Numeric.Signal:interpolate from hsignal-0.2.7.1

Percentage Accurate: 79.5% → 93.7%

Time: 5.5s

Alternatives: 21

Speedup: 0.3×

Specification

Math

\[\begin{array}{l} \\ x + \left(y - z\right) \cdot \frac{t - x}{a - z} \end{array} \]

FPCore

(FPCore (x y z t a) :precision binary64 (+ x (* (- y z) (/ (- t x) (- a z)))))

C

double code(double x, double y, double z, double t, double a) {
	return x + ((y - z) * ((t - x) / (a - z)));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = x + ((y - z) * ((t - x) / (a - z)))
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	return x + ((y - z) * ((t - x) / (a - z)));
}

Python

def code(x, y, z, t, a):
	return x + ((y - z) * ((t - x) / (a - z)))

Julia

function code(x, y, z, t, a)
	return Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
end

MATLAB

function tmp = code(x, y, z, t, a)
	tmp = x + ((y - z) * ((t - x) / (a - z)));
end

Wolfram

code[x_, y_, z_, t_, a_] := N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Initial Program: 79.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ x + \left(y - z\right) \cdot \frac{t - x}{a - z} \end{array} \]

FPCore

(FPCore (x y z t a) :precision binary64 (+ x (* (- y z) (/ (- t x) (- a z)))))

C

double code(double x, double y, double z, double t, double a) {
	return x + ((y - z) * ((t - x) / (a - z)));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = x + ((y - z) * ((t - x) / (a - z)))
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	return x + ((y - z) * ((t - x) / (a - z)));
}

Python

def code(x, y, z, t, a):
	return x + ((y - z) * ((t - x) / (a - z)))

Julia

function code(x, y, z, t, a)
	return Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
end

MATLAB

function tmp = code(x, y, z, t, a)
	tmp = x + ((y - z) * ((t - x) / (a - z)));
end

Wolfram

code[x_, y_, z_, t_, a_] := N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Alternative 1: 93.7% accurate, 0.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)\\ t_2 := x + \left(y - z\right) \cdot \frac{t - x}{a - z}\\ \mathbf{if}\;t\_2 \leq -2 \cdot 10^{+36}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_2 \leq 5 \cdot 10^{-126}:\\ \;\;\;\;\frac{\mathsf{fma}\left(-1, t \cdot \left(y - z\right), x \cdot \left(y - a\right)\right)}{z - a}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (fma (/ (- z y) (- a z)) (- x t) x))
        (t_2 (+ x (* (- y z) (/ (- t x) (- a z))))))
   (if (<= t_2 -2e+36)
     t_1
     (if (<= t_2 5e-126)
       (/ (fma -1.0 (* t (- y z)) (* x (- y a))) (- z a))
       t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = fma(((z - y) / (a - z)), (x - t), x);
	double t_2 = x + ((y - z) * ((t - x) / (a - z)));
	double tmp;
	if (t_2 <= -2e+36) {
		tmp = t_1;
	} else if (t_2 <= 5e-126) {
		tmp = fma(-1.0, (t * (y - z)), (x * (y - a))) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	t_1 = fma(Float64(Float64(z - y) / Float64(a - z)), Float64(x - t), x)
	t_2 = Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
	tmp = 0.0
	if (t_2 <= -2e+36)
		tmp = t_1;
	elseif (t_2 <= 5e-126)
		tmp = Float64(fma(-1.0, Float64(t * Float64(y - z)), Float64(x * Float64(y - a))) / Float64(z - a));
	else
		tmp = t_1;
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(N[(z - y), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * N[(x - t), $MachinePrecision] + x), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -2e+36], t$95$1, If[LessEqual[t$95$2, 5e-126], N[(N[(-1.0 * N[(t * N[(y - z), $MachinePrecision]), $MachinePrecision] + N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 2 regimes

2. if (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -2.00000000000000008e36 or 5.00000000000000006e-126 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z))))

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]
   4. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \frac{z - y}{\frac{z - a}{t - x}}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}} + x} \]

      3. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} + x \]

      4. lift-/.f64 N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{z - a}{t - x}}} + x \]

      5. frac-2neg N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(z - a\right)\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}}} + x \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(z - a\right)}\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      8. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      9. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{a - z}{\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)}} + x \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      11. lift--.f64 N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      12. associate-/r/ N/A

          \[\leadsto \color{blue}{\frac{z - y}{a - z} \cdot \left(x - t\right)} + x \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\color{blue}{z - y}}{a - z} \cdot \left(x - t\right) + x \]

      14. sub-div N/A

          \[\leadsto \color{blue}{\left(\frac{z}{a - z} - \frac{y}{a - z}\right)} \cdot \left(x - t\right) + x \]

      15. lift-/.f64 N/A

          \[\leadsto \left(\color{blue}{\frac{z}{a - z}} - \frac{y}{a - z}\right) \cdot \left(x - t\right) + x \]

      16. lift-/.f64 N/A

          \[\leadsto \left(\frac{z}{a - z} - \color{blue}{\frac{y}{a - z}}\right) \cdot \left(x - t\right) + x \]

      17. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z}{a - z} - \frac{y}{a - z}, x - t, x\right)} \]

   5. Applied rewrites 83.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)} \]

   if -2.00000000000000008e36 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 5.00000000000000006e-126

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \frac{\color{blue}{-1 \cdot \left(t \cdot \left(y - z\right)\right) + x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-fma.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-1, \color{blue}{t \cdot \left(y - z\right)}, x \cdot \left(y - a\right)\right)}{z - a} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-1, t \cdot \color{blue}{\left(y - z\right)}, x \cdot \left(y - a\right)\right)}{z - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-1, t \cdot \left(y - \color{blue}{z}\right), x \cdot \left(y - a\right)\right)}{z - a} \]

      4. lower-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-1, t \cdot \left(y - z\right), x \cdot \left(y - a\right)\right)}{z - a} \]

      5. lower--.f64 74.0

         \[\leadsto \frac{\mathsf{fma}\left(-1, t \cdot \left(y - z\right), x \cdot \left(y - a\right)\right)}{z - a} \]

   6. Applied rewrites 74.0%

      \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(-1, t \cdot \left(y - z\right), x \cdot \left(y - a\right)\right)}}{z - a} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 2: 88.3% accurate, 0.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)\\ t_2 := x + \left(y - z\right) \cdot \frac{t - x}{a - z}\\ \mathbf{if}\;t\_2 \leq -1 \cdot 10^{-231}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_2 \leq 0:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (fma (/ (- z y) (- a z)) (- x t) x))
        (t_2 (+ x (* (- y z) (/ (- t x) (- a z))))))
   (if (<= t_2 -1e-231) t_1 (if (<= t_2 0.0) (/ (* x (- y a)) (- z a)) t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = fma(((z - y) / (a - z)), (x - t), x);
	double t_2 = x + ((y - z) * ((t - x) / (a - z)));
	double tmp;
	if (t_2 <= -1e-231) {
		tmp = t_1;
	} else if (t_2 <= 0.0) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	t_1 = fma(Float64(Float64(z - y) / Float64(a - z)), Float64(x - t), x)
	t_2 = Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
	tmp = 0.0
	if (t_2 <= -1e-231)
		tmp = t_1;
	elseif (t_2 <= 0.0)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	else
		tmp = t_1;
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(N[(z - y), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * N[(x - t), $MachinePrecision] + x), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -1e-231], t$95$1, If[LessEqual[t$95$2, 0.0], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 2 regimes

2. if (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -9.9999999999999999e-232 or 0.0 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z))))

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]
   4. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \frac{z - y}{\frac{z - a}{t - x}}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}} + x} \]

      3. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} + x \]

      4. lift-/.f64 N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{z - a}{t - x}}} + x \]

      5. frac-2neg N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(z - a\right)\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}}} + x \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(z - a\right)}\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      8. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      9. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{a - z}{\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)}} + x \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      11. lift--.f64 N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      12. associate-/r/ N/A

          \[\leadsto \color{blue}{\frac{z - y}{a - z} \cdot \left(x - t\right)} + x \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\color{blue}{z - y}}{a - z} \cdot \left(x - t\right) + x \]

      14. sub-div N/A

          \[\leadsto \color{blue}{\left(\frac{z}{a - z} - \frac{y}{a - z}\right)} \cdot \left(x - t\right) + x \]

      15. lift-/.f64 N/A

          \[\leadsto \left(\color{blue}{\frac{z}{a - z}} - \frac{y}{a - z}\right) \cdot \left(x - t\right) + x \]

      16. lift-/.f64 N/A

          \[\leadsto \left(\frac{z}{a - z} - \color{blue}{\frac{y}{a - z}}\right) \cdot \left(x - t\right) + x \]

      17. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z}{a - z} - \frac{y}{a - z}, x - t, x\right)} \]

   5. Applied rewrites 83.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)} \]

   if -9.9999999999999999e-232 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 0.0

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 3: 84.3% accurate, 0.2× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \mathsf{fma}\left(\frac{x - t}{z - a}, y - z, x\right)\\ t_2 := x + \left(y - z\right) \cdot \frac{t - x}{a - z}\\ \mathbf{if}\;t\_2 \leq -2 \cdot 10^{-137}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_2 \leq 10^{-182}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{elif}\;t\_2 \leq 5 \cdot 10^{+306}:\\ \;\;\;\;t\_1\\ \mathbf{else}:\\ \;\;\;\;x + \frac{y \cdot \left(t - x\right)}{a - z}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (fma (/ (- x t) (- z a)) (- y z) x))
        (t_2 (+ x (* (- y z) (/ (- t x) (- a z))))))
   (if (<= t_2 -2e-137)
     t_1
     (if (<= t_2 1e-182)
       (/ (* x (- y a)) (- z a))
       (if (<= t_2 5e+306) t_1 (+ x (/ (* y (- t x)) (- a z))))))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = fma(((x - t) / (z - a)), (y - z), x);
	double t_2 = x + ((y - z) * ((t - x) / (a - z)));
	double tmp;
	if (t_2 <= -2e-137) {
		tmp = t_1;
	} else if (t_2 <= 1e-182) {
		tmp = (x * (y - a)) / (z - a);
	} else if (t_2 <= 5e+306) {
		tmp = t_1;
	} else {
		tmp = x + ((y * (t - x)) / (a - z));
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	t_1 = fma(Float64(Float64(x - t) / Float64(z - a)), Float64(y - z), x)
	t_2 = Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
	tmp = 0.0
	if (t_2 <= -2e-137)
		tmp = t_1;
	elseif (t_2 <= 1e-182)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	elseif (t_2 <= 5e+306)
		tmp = t_1;
	else
		tmp = Float64(x + Float64(Float64(y * Float64(t - x)) / Float64(a - z)));
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(N[(x - t), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision] * N[(y - z), $MachinePrecision] + x), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -2e-137], t$95$1, If[LessEqual[t$95$2, 1e-182], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$2, 5e+306], t$95$1, N[(x + N[(N[(y * N[(t - x), $MachinePrecision]), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]]]

Derivation

1. Split input into 3 regimes

2. if (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -1.99999999999999996e-137 or 1e-182 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 4.99999999999999993e306

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z} + x} \]

      3. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} + x \]

      4. *-commutative N/A

         \[\leadsto \color{blue}{\frac{t - x}{a - z} \cdot \left(y - z\right)} + x \]

      5. lower-fma.f64 79.5

         \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{t - x}{a - z}, y - z, x\right)} \]

      6. lift-/.f64 N/A

         \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{t - x}{a - z}}, y - z, x\right) \]

      7. frac-2neg N/A

         \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}}, y - z, x\right) \]

      8. lower-/.f64 N/A

         \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}}, y - z, x\right) \]

      9. lift--.f64 N/A

         \[\leadsto \mathsf{fma}\left(\frac{\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}, y - z, x\right) \]

      10. sub-negate-rev N/A

          \[\leadsto \mathsf{fma}\left(\frac{\color{blue}{x - t}}{\mathsf{neg}\left(\left(a - z\right)\right)}, y - z, x\right) \]

      11. lower--.f64 N/A

          \[\leadsto \mathsf{fma}\left(\frac{\color{blue}{x - t}}{\mathsf{neg}\left(\left(a - z\right)\right)}, y - z, x\right) \]

      12. lift--.f64 N/A

          \[\leadsto \mathsf{fma}\left(\frac{x - t}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}, y - z, x\right) \]

      13. sub-negate-rev N/A

          \[\leadsto \mathsf{fma}\left(\frac{x - t}{\color{blue}{z - a}}, y - z, x\right) \]

      14. lower--.f64 79.5

          \[\leadsto \mathsf{fma}\left(\frac{x - t}{\color{blue}{z - a}}, y - z, x\right) \]

   3. Applied rewrites 79.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - t}{z - a}, y - z, x\right)} \]

   if -1.99999999999999996e-137 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 1e-182

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if 4.99999999999999993e306 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z))))

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in y around inf

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a - z}} \]
   3. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a - z}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a} - z} \]

      3. lower--.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a - z} \]

      4. lower--.f64 54.4

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a - \color{blue}{z}} \]

   4. Applied rewrites 54.4%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a - z}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 4: 71.3% accurate, 0.8× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;t \leq -7 \cdot 10^{-91}:\\ \;\;\;\;x + \left(y - z\right) \cdot \frac{t}{a - z}\\ \mathbf{elif}\;t \leq 9 \cdot 10^{-51}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{z - y}{\frac{z - a}{t}}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= t -7e-91)
   (+ x (* (- y z) (/ t (- a z))))
   (if (<= t 9e-51)
     (/ (* x (- y a)) (- z a))
     (+ x (/ (- z y) (/ (- z a) t))))))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (t <= -7e-91) {
		tmp = x + ((y - z) * (t / (a - z)));
	} else if (t <= 9e-51) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = x + ((z - y) / ((z - a) / t));
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: tmp
    if (t <= (-7d-91)) then
        tmp = x + ((y - z) * (t / (a - z)))
    else if (t <= 9d-51) then
        tmp = (x * (y - a)) / (z - a)
    else
        tmp = x + ((z - y) / ((z - a) / t))
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (t <= -7e-91) {
		tmp = x + ((y - z) * (t / (a - z)));
	} else if (t <= 9e-51) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = x + ((z - y) / ((z - a) / t));
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	tmp = 0
	if t <= -7e-91:
		tmp = x + ((y - z) * (t / (a - z)))
	elif t <= 9e-51:
		tmp = (x * (y - a)) / (z - a)
	else:
		tmp = x + ((z - y) / ((z - a) / t))
	return tmp

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (t <= -7e-91)
		tmp = Float64(x + Float64(Float64(y - z) * Float64(t / Float64(a - z))));
	elseif (t <= 9e-51)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	else
		tmp = Float64(x + Float64(Float64(z - y) / Float64(Float64(z - a) / t)));
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	tmp = 0.0;
	if (t <= -7e-91)
		tmp = x + ((y - z) * (t / (a - z)));
	elseif (t <= 9e-51)
		tmp = (x * (y - a)) / (z - a);
	else
		tmp = x + ((z - y) / ((z - a) / t));
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[t, -7e-91], N[(x + N[(N[(y - z), $MachinePrecision] * N[(t / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[t, 9e-51], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], N[(x + N[(N[(z - y), $MachinePrecision] / N[(N[(z - a), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if t < -6.9999999999999997e-91

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in x around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a - z} \]
   3. Step-by-step derivation

   4. Applied rewrites 63.7%

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a - z} \]

   if -6.9999999999999997e-91 < t < 8.99999999999999948e-51

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if 8.99999999999999948e-51 < t

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around inf

      \[\leadsto x + \frac{z - y}{\color{blue}{\frac{z}{t - x}}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{z - y}{\frac{z}{\color{blue}{t - x}}} \]

      2. lower--.f64 36.9

         \[\leadsto x + \frac{z - y}{\frac{z}{t - \color{blue}{x}}} \]

   6. Applied rewrites 36.9%

      \[\leadsto x + \frac{z - y}{\color{blue}{\frac{z}{t - x}}} \]

   7. Taylor expanded in x around 0

      \[\leadsto x + \frac{z - y}{\color{blue}{\frac{z - a}{t}}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{z - y}{\frac{z - a}{\color{blue}{t}}} \]

      2. lower--.f64 63.6

         \[\leadsto x + \frac{z - y}{\frac{z - a}{t}} \]

   9. Applied rewrites 63.6%

      \[\leadsto x + \frac{z - y}{\color{blue}{\frac{z - a}{t}}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 5: 71.3% accurate, 0.8× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x + \left(y - z\right) \cdot \frac{t}{a - z}\\ \mathbf{if}\;t \leq -7 \cdot 10^{-91}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t \leq 9 \cdot 10^{-51}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (+ x (* (- y z) (/ t (- a z))))))
   (if (<= t -7e-91) t_1 (if (<= t 9e-51) (/ (* x (- y a)) (- z a)) t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((y - z) * (t / (a - z)));
	double tmp;
	if (t <= -7e-91) {
		tmp = t_1;
	} else if (t <= 9e-51) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = x + ((y - z) * (t / (a - z)))
    if (t <= (-7d-91)) then
        tmp = t_1
    else if (t <= 9d-51) then
        tmp = (x * (y - a)) / (z - a)
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((y - z) * (t / (a - z)));
	double tmp;
	if (t <= -7e-91) {
		tmp = t_1;
	} else if (t <= 9e-51) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = x + ((y - z) * (t / (a - z)))
	tmp = 0
	if t <= -7e-91:
		tmp = t_1
	elif t <= 9e-51:
		tmp = (x * (y - a)) / (z - a)
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(x + Float64(Float64(y - z) * Float64(t / Float64(a - z))))
	tmp = 0.0
	if (t <= -7e-91)
		tmp = t_1;
	elseif (t <= 9e-51)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = x + ((y - z) * (t / (a - z)));
	tmp = 0.0;
	if (t <= -7e-91)
		tmp = t_1;
	elseif (t <= 9e-51)
		tmp = (x * (y - a)) / (z - a);
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(x + N[(N[(y - z), $MachinePrecision] * N[(t / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t, -7e-91], t$95$1, If[LessEqual[t, 9e-51], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if t < -6.9999999999999997e-91 or 8.99999999999999948e-51 < t

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in x around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a - z} \]
   3. Step-by-step derivation

   4. Applied rewrites 63.7%

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a - z} \]

   if -6.9999999999999997e-91 < t < 8.99999999999999948e-51

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 67.5% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;a \leq -4.2 \cdot 10^{-9}:\\ \;\;\;\;\mathsf{fma}\left(\frac{z - y}{a}, x - t, x\right)\\ \mathbf{elif}\;a \leq -1.92 \cdot 10^{-174}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{elif}\;a \leq 1.7 \cdot 10^{-27}:\\ \;\;\;\;\frac{y - z}{a - z} \cdot t\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= a -4.2e-9)
   (fma (/ (- z y) a) (- x t) x)
   (if (<= a -1.92e-174)
     (/ (* x (- y a)) (- z a))
     (if (<= a 1.7e-27)
       (* (/ (- y z) (- a z)) t)
       (fma (/ (- t x) a) (- y z) x)))))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (a <= -4.2e-9) {
		tmp = fma(((z - y) / a), (x - t), x);
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.7e-27) {
		tmp = ((y - z) / (a - z)) * t;
	} else {
		tmp = fma(((t - x) / a), (y - z), x);
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (a <= -4.2e-9)
		tmp = fma(Float64(Float64(z - y) / a), Float64(x - t), x);
	elseif (a <= -1.92e-174)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	elseif (a <= 1.7e-27)
		tmp = Float64(Float64(Float64(y - z) / Float64(a - z)) * t);
	else
		tmp = fma(Float64(Float64(t - x) / a), Float64(y - z), x);
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[a, -4.2e-9], N[(N[(N[(z - y), $MachinePrecision] / a), $MachinePrecision] * N[(x - t), $MachinePrecision] + x), $MachinePrecision], If[LessEqual[a, -1.92e-174], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 1.7e-27], N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision], N[(N[(N[(t - x), $MachinePrecision] / a), $MachinePrecision] * N[(y - z), $MachinePrecision] + x), $MachinePrecision]]]]

Derivation

1. Split input into 4 regimes

2. if a < -4.20000000000000039e-9

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]
   4. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \frac{z - y}{\frac{z - a}{t - x}}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}} + x} \]

      3. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} + x \]

      4. lift-/.f64 N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{z - a}{t - x}}} + x \]

      5. frac-2neg N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(z - a\right)\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}}} + x \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(z - a\right)}\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      8. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      9. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{a - z}{\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)}} + x \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      11. lift--.f64 N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      12. associate-/r/ N/A

          \[\leadsto \color{blue}{\frac{z - y}{a - z} \cdot \left(x - t\right)} + x \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\color{blue}{z - y}}{a - z} \cdot \left(x - t\right) + x \]

      14. sub-div N/A

          \[\leadsto \color{blue}{\left(\frac{z}{a - z} - \frac{y}{a - z}\right)} \cdot \left(x - t\right) + x \]

      15. lift-/.f64 N/A

          \[\leadsto \left(\color{blue}{\frac{z}{a - z}} - \frac{y}{a - z}\right) \cdot \left(x - t\right) + x \]

      16. lift-/.f64 N/A

          \[\leadsto \left(\frac{z}{a - z} - \color{blue}{\frac{y}{a - z}}\right) \cdot \left(x - t\right) + x \]

      17. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z}{a - z} - \frac{y}{a - z}, x - t, x\right)} \]

   5. Applied rewrites 83.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)} \]

   6. Taylor expanded in z around 0

      \[\leadsto \mathsf{fma}\left(\frac{z - y}{\color{blue}{a}}, x - t, x\right) \]
   7. Step-by-step derivation

   8. Applied rewrites 52.6%

      \[\leadsto \mathsf{fma}\left(\frac{z - y}{\color{blue}{a}}, x - t, x\right) \]

   if -4.20000000000000039e-9 < a < -1.92e-174

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if -1.92e-174 < a < 1.69999999999999985e-27

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]

   if 1.69999999999999985e-27 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]
   3. Step-by-step derivation

   4. Applied rewrites 51.1%

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]
   5. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a} + x} \]

      3. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a}} + x \]

      4. *-commutative N/A

         \[\leadsto \color{blue}{\frac{t - x}{a} \cdot \left(y - z\right)} + x \]

      5. lower-fma.f64 51.1

         \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)} \]

   6. Applied rewrites 51.1%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)} \]
3. Recombined 4 regimes into one program.
4. Add Preprocessing

Alternative 7: 65.9% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)\\ \mathbf{if}\;a \leq -4.2 \cdot 10^{-9}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq -1.92 \cdot 10^{-174}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{elif}\;a \leq 1.7 \cdot 10^{-27}:\\ \;\;\;\;\frac{y - z}{a - z} \cdot t\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (fma (/ (- t x) a) (- y z) x)))
   (if (<= a -4.2e-9)
     t_1
     (if (<= a -1.92e-174)
       (/ (* x (- y a)) (- z a))
       (if (<= a 1.7e-27) (* (/ (- y z) (- a z)) t) t_1)))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = fma(((t - x) / a), (y - z), x);
	double tmp;
	if (a <= -4.2e-9) {
		tmp = t_1;
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.7e-27) {
		tmp = ((y - z) / (a - z)) * t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	t_1 = fma(Float64(Float64(t - x) / a), Float64(y - z), x)
	tmp = 0.0
	if (a <= -4.2e-9)
		tmp = t_1;
	elseif (a <= -1.92e-174)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	elseif (a <= 1.7e-27)
		tmp = Float64(Float64(Float64(y - z) / Float64(a - z)) * t);
	else
		tmp = t_1;
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(N[(t - x), $MachinePrecision] / a), $MachinePrecision] * N[(y - z), $MachinePrecision] + x), $MachinePrecision]}, If[LessEqual[a, -4.2e-9], t$95$1, If[LessEqual[a, -1.92e-174], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 1.7e-27], N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 3 regimes

2. if a < -4.20000000000000039e-9 or 1.69999999999999985e-27 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]
   3. Step-by-step derivation

   4. Applied rewrites 51.1%

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]
   5. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a} + x} \]

      3. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a}} + x \]

      4. *-commutative N/A

         \[\leadsto \color{blue}{\frac{t - x}{a} \cdot \left(y - z\right)} + x \]

      5. lower-fma.f64 51.1

         \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)} \]

   6. Applied rewrites 51.1%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{t - x}{a}, y - z, x\right)} \]

   if -4.20000000000000039e-9 < a < -1.92e-174

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if -1.92e-174 < a < 1.69999999999999985e-27

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 8: 64.9% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;a \leq -1.42 \cdot 10^{-8}:\\ \;\;\;\;x + \left(t - x\right) \cdot \frac{y}{a}\\ \mathbf{elif}\;a \leq -1.92 \cdot 10^{-174}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{elif}\;a \leq 1.6 \cdot 10^{-30}:\\ \;\;\;\;\frac{y - z}{a - z} \cdot t\\ \mathbf{elif}\;a \leq 6.1 \cdot 10^{+35}:\\ \;\;\;\;y \cdot \frac{t - x}{a - z}\\ \mathbf{else}:\\ \;\;\;\;x + \left(y - z\right) \cdot \frac{t}{a}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= a -1.42e-8)
   (+ x (* (- t x) (/ y a)))
   (if (<= a -1.92e-174)
     (/ (* x (- y a)) (- z a))
     (if (<= a 1.6e-30)
       (* (/ (- y z) (- a z)) t)
       (if (<= a 6.1e+35)
         (* y (/ (- t x) (- a z)))
         (+ x (* (- y z) (/ t a))))))))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (a <= -1.42e-8) {
		tmp = x + ((t - x) * (y / a));
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.6e-30) {
		tmp = ((y - z) / (a - z)) * t;
	} else if (a <= 6.1e+35) {
		tmp = y * ((t - x) / (a - z));
	} else {
		tmp = x + ((y - z) * (t / a));
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: tmp
    if (a <= (-1.42d-8)) then
        tmp = x + ((t - x) * (y / a))
    else if (a <= (-1.92d-174)) then
        tmp = (x * (y - a)) / (z - a)
    else if (a <= 1.6d-30) then
        tmp = ((y - z) / (a - z)) * t
    else if (a <= 6.1d+35) then
        tmp = y * ((t - x) / (a - z))
    else
        tmp = x + ((y - z) * (t / a))
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (a <= -1.42e-8) {
		tmp = x + ((t - x) * (y / a));
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.6e-30) {
		tmp = ((y - z) / (a - z)) * t;
	} else if (a <= 6.1e+35) {
		tmp = y * ((t - x) / (a - z));
	} else {
		tmp = x + ((y - z) * (t / a));
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	tmp = 0
	if a <= -1.42e-8:
		tmp = x + ((t - x) * (y / a))
	elif a <= -1.92e-174:
		tmp = (x * (y - a)) / (z - a)
	elif a <= 1.6e-30:
		tmp = ((y - z) / (a - z)) * t
	elif a <= 6.1e+35:
		tmp = y * ((t - x) / (a - z))
	else:
		tmp = x + ((y - z) * (t / a))
	return tmp

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (a <= -1.42e-8)
		tmp = Float64(x + Float64(Float64(t - x) * Float64(y / a)));
	elseif (a <= -1.92e-174)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	elseif (a <= 1.6e-30)
		tmp = Float64(Float64(Float64(y - z) / Float64(a - z)) * t);
	elseif (a <= 6.1e+35)
		tmp = Float64(y * Float64(Float64(t - x) / Float64(a - z)));
	else
		tmp = Float64(x + Float64(Float64(y - z) * Float64(t / a)));
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	tmp = 0.0;
	if (a <= -1.42e-8)
		tmp = x + ((t - x) * (y / a));
	elseif (a <= -1.92e-174)
		tmp = (x * (y - a)) / (z - a);
	elseif (a <= 1.6e-30)
		tmp = ((y - z) / (a - z)) * t;
	elseif (a <= 6.1e+35)
		tmp = y * ((t - x) / (a - z));
	else
		tmp = x + ((y - z) * (t / a));
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[a, -1.42e-8], N[(x + N[(N[(t - x), $MachinePrecision] * N[(y / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, -1.92e-174], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 1.6e-30], N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision], If[LessEqual[a, 6.1e+35], N[(y * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(x + N[(N[(y - z), $MachinePrecision] * N[(t / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]]

Derivation

1. Split input into 5 regimes

2. if a < -1.41999999999999998e-8

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. *-commutative N/A

         \[\leadsto x + \frac{\left(t - x\right) \cdot y}{a} \]

      4. associate-/l* N/A

         \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

      5. lower-*.f64 N/A

         \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

      6. lower-/.f64 48.3

         \[\leadsto x + \left(t - x\right) \cdot \frac{y}{\color{blue}{a}} \]

   8. Applied rewrites 48.3%

      \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

   if -1.41999999999999998e-8 < a < -1.92e-174

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if -1.92e-174 < a < 1.6e-30

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]

   if 1.6e-30 < a < 6.09999999999999977e35

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. mul-1-neg N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      3. lift-/.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      4. lift-*.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      5. lift--.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      6. associate-/l* N/A

         \[\leadsto \mathsf{neg}\left(y \cdot \frac{t - x}{z - a}\right) \]

      7. distribute-rgt-neg-in N/A

         \[\leadsto y \cdot \color{blue}{\left(\mathsf{neg}\left(\frac{t - x}{z - a}\right)\right)} \]

      8. distribute-frac-neg2 N/A

         \[\leadsto y \cdot \frac{t - x}{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}} \]

      9. lift--.f64 N/A

         \[\leadsto y \cdot \frac{t - x}{\mathsf{neg}\left(\left(z - a\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      11. lower-*.f64 N/A

          \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

      12. lift--.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      13. lower-/.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a - z}} \]

      14. lift--.f64 41.3

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a} - z} \]

   8. Applied rewrites 41.3%

      \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

   if 6.09999999999999977e35 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]
   3. Step-by-step derivation

   4. Applied rewrites 51.1%

      \[\leadsto x + \left(y - z\right) \cdot \frac{t - x}{\color{blue}{a}} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a} \]
   6. Step-by-step derivation

   7. Applied rewrites 43.3%

      \[\leadsto x + \left(y - z\right) \cdot \frac{\color{blue}{t}}{a} \]
3. Recombined 5 regimes into one program.
4. Add Preprocessing

Alternative 9: 64.6% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x + \left(t - x\right) \cdot \frac{y}{a}\\ \mathbf{if}\;a \leq -1.42 \cdot 10^{-8}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq -1.92 \cdot 10^{-174}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{elif}\;a \leq 1.7 \cdot 10^{-27}:\\ \;\;\;\;\frac{y - z}{a - z} \cdot t\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (+ x (* (- t x) (/ y a)))))
   (if (<= a -1.42e-8)
     t_1
     (if (<= a -1.92e-174)
       (/ (* x (- y a)) (- z a))
       (if (<= a 1.7e-27) (* (/ (- y z) (- a z)) t) t_1)))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t - x) * (y / a));
	double tmp;
	if (a <= -1.42e-8) {
		tmp = t_1;
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.7e-27) {
		tmp = ((y - z) / (a - z)) * t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = x + ((t - x) * (y / a))
    if (a <= (-1.42d-8)) then
        tmp = t_1
    else if (a <= (-1.92d-174)) then
        tmp = (x * (y - a)) / (z - a)
    else if (a <= 1.7d-27) then
        tmp = ((y - z) / (a - z)) * t
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t - x) * (y / a));
	double tmp;
	if (a <= -1.42e-8) {
		tmp = t_1;
	} else if (a <= -1.92e-174) {
		tmp = (x * (y - a)) / (z - a);
	} else if (a <= 1.7e-27) {
		tmp = ((y - z) / (a - z)) * t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = x + ((t - x) * (y / a))
	tmp = 0
	if a <= -1.42e-8:
		tmp = t_1
	elif a <= -1.92e-174:
		tmp = (x * (y - a)) / (z - a)
	elif a <= 1.7e-27:
		tmp = ((y - z) / (a - z)) * t
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(x + Float64(Float64(t - x) * Float64(y / a)))
	tmp = 0.0
	if (a <= -1.42e-8)
		tmp = t_1;
	elseif (a <= -1.92e-174)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	elseif (a <= 1.7e-27)
		tmp = Float64(Float64(Float64(y - z) / Float64(a - z)) * t);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = x + ((t - x) * (y / a));
	tmp = 0.0;
	if (a <= -1.42e-8)
		tmp = t_1;
	elseif (a <= -1.92e-174)
		tmp = (x * (y - a)) / (z - a);
	elseif (a <= 1.7e-27)
		tmp = ((y - z) / (a - z)) * t;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(x + N[(N[(t - x), $MachinePrecision] * N[(y / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[a, -1.42e-8], t$95$1, If[LessEqual[a, -1.92e-174], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 1.7e-27], N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 3 regimes

2. if a < -1.41999999999999998e-8 or 1.69999999999999985e-27 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. *-commutative N/A

         \[\leadsto x + \frac{\left(t - x\right) \cdot y}{a} \]

      4. associate-/l* N/A

         \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

      5. lower-*.f64 N/A

         \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

      6. lower-/.f64 48.3

         \[\leadsto x + \left(t - x\right) \cdot \frac{y}{\color{blue}{a}} \]

   8. Applied rewrites 48.3%

      \[\leadsto x + \left(t - x\right) \cdot \color{blue}{\frac{y}{a}} \]

   if -1.41999999999999998e-8 < a < -1.92e-174

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]

   if -1.92e-174 < a < 1.69999999999999985e-27

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 10: 61.1% accurate, 0.8× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := -\frac{y}{z - a} \cdot \left(t - x\right)\\ \mathbf{if}\;y \leq -5.4 \cdot 10^{+116}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;y \leq 8.5 \cdot 10^{+60}:\\ \;\;\;\;\mathsf{fma}\left(\frac{z}{a - z}, x - t, x\right)\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (- (* (/ y (- z a)) (- t x)))))
   (if (<= y -5.4e+116)
     t_1
     (if (<= y 8.5e+60) (fma (/ z (- a z)) (- x t) x) t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = -((y / (z - a)) * (t - x));
	double tmp;
	if (y <= -5.4e+116) {
		tmp = t_1;
	} else if (y <= 8.5e+60) {
		tmp = fma((z / (a - z)), (x - t), x);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a)
	t_1 = Float64(-Float64(Float64(y / Float64(z - a)) * Float64(t - x)))
	tmp = 0.0
	if (y <= -5.4e+116)
		tmp = t_1;
	elseif (y <= 8.5e+60)
		tmp = fma(Float64(z / Float64(a - z)), Float64(x - t), x);
	else
		tmp = t_1;
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = (-N[(N[(y / N[(z - a), $MachinePrecision]), $MachinePrecision] * N[(t - x), $MachinePrecision]), $MachinePrecision])}, If[LessEqual[y, -5.4e+116], t$95$1, If[LessEqual[y, 8.5e+60], N[(N[(z / N[(a - z), $MachinePrecision]), $MachinePrecision] * N[(x - t), $MachinePrecision] + x), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if y < -5.3999999999999999e116 or 8.50000000000000064e60 < y

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. mul-1-neg N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      3. lift-/.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      4. div-flip N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{z - a}{y \cdot \left(t - x\right)}}\right) \]

      5. lift-*.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{z - a}{y \cdot \left(t - x\right)}}\right) \]

      6. lift--.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{z - a}{y \cdot \left(t - x\right)}}\right) \]

      7. *-commutative N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{z - a}{\left(t - x\right) \cdot y}}\right) \]

      8. associate-/r* N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{\frac{z - a}{t - x}}{y}}\right) \]

      9. lift--.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{1}{\frac{\frac{z - a}{t - x}}{y}}\right) \]

      10. div-flip N/A

          \[\leadsto \mathsf{neg}\left(\frac{y}{\frac{z - a}{t - x}}\right) \]

      11. lower-neg.f64 N/A

          \[\leadsto -\frac{y}{\frac{z - a}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto -\frac{y}{\frac{z - a}{t - x}} \]

      13. associate-/r/ N/A

          \[\leadsto -\frac{y}{z - a} \cdot \left(t - x\right) \]

      14. lower-*.f64 N/A

          \[\leadsto -\frac{y}{z - a} \cdot \left(t - x\right) \]

      15. lower-/.f64 N/A

          \[\leadsto -\frac{y}{z - a} \cdot \left(t - x\right) \]

      16. lift--.f64 42.8

          \[\leadsto -\frac{y}{z - a} \cdot \left(t - x\right) \]

   8. Applied rewrites 42.8%

      \[\leadsto -\frac{y}{z - a} \cdot \left(t - x\right) \]

   if -5.3999999999999999e116 < y < 8.50000000000000064e60

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]
   4. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \frac{z - y}{\frac{z - a}{t - x}}} \]

      2. +-commutative N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}} + x} \]

      3. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} + x \]

      4. lift-/.f64 N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{z - a}{t - x}}} + x \]

      5. frac-2neg N/A

         \[\leadsto \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(z - a\right)\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}}} + x \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(z - a\right)}\right)}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      8. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{\color{blue}{a - z}}{\mathsf{neg}\left(\left(t - x\right)\right)}} + x \]

      9. lift--.f64 N/A

         \[\leadsto \frac{z - y}{\frac{a - z}{\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)}} + x \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      11. lift--.f64 N/A

          \[\leadsto \frac{z - y}{\frac{a - z}{\color{blue}{x - t}}} + x \]

      12. associate-/r/ N/A

          \[\leadsto \color{blue}{\frac{z - y}{a - z} \cdot \left(x - t\right)} + x \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\color{blue}{z - y}}{a - z} \cdot \left(x - t\right) + x \]

      14. sub-div N/A

          \[\leadsto \color{blue}{\left(\frac{z}{a - z} - \frac{y}{a - z}\right)} \cdot \left(x - t\right) + x \]

      15. lift-/.f64 N/A

          \[\leadsto \left(\color{blue}{\frac{z}{a - z}} - \frac{y}{a - z}\right) \cdot \left(x - t\right) + x \]

      16. lift-/.f64 N/A

          \[\leadsto \left(\frac{z}{a - z} - \color{blue}{\frac{y}{a - z}}\right) \cdot \left(x - t\right) + x \]

      17. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z}{a - z} - \frac{y}{a - z}, x - t, x\right)} \]

   5. Applied rewrites 83.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z - y}{a - z}, x - t, x\right)} \]

   6. Taylor expanded in y around 0

      \[\leadsto \mathsf{fma}\left(\frac{\color{blue}{z}}{a - z}, x - t, x\right) \]
   7. Step-by-step derivation

   8. Applied rewrites 47.1%

      \[\leadsto \mathsf{fma}\left(\frac{\color{blue}{z}}{a - z}, x - t, x\right) \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 11: 60.7% accurate, 0.9× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{y - z}{a - z} \cdot t\\ \mathbf{if}\;t \leq -7.9 \cdot 10^{-75}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t \leq 1.4 \cdot 10^{-39}:\\ \;\;\;\;\frac{x \cdot \left(y - a\right)}{z - a}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (* (/ (- y z) (- a z)) t)))
   (if (<= t -7.9e-75) t_1 (if (<= t 1.4e-39) (/ (* x (- y a)) (- z a)) t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = ((y - z) / (a - z)) * t;
	double tmp;
	if (t <= -7.9e-75) {
		tmp = t_1;
	} else if (t <= 1.4e-39) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = ((y - z) / (a - z)) * t
    if (t <= (-7.9d-75)) then
        tmp = t_1
    else if (t <= 1.4d-39) then
        tmp = (x * (y - a)) / (z - a)
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = ((y - z) / (a - z)) * t;
	double tmp;
	if (t <= -7.9e-75) {
		tmp = t_1;
	} else if (t <= 1.4e-39) {
		tmp = (x * (y - a)) / (z - a);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = ((y - z) / (a - z)) * t
	tmp = 0
	if t <= -7.9e-75:
		tmp = t_1
	elif t <= 1.4e-39:
		tmp = (x * (y - a)) / (z - a)
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(Float64(Float64(y - z) / Float64(a - z)) * t)
	tmp = 0.0
	if (t <= -7.9e-75)
		tmp = t_1;
	elseif (t <= 1.4e-39)
		tmp = Float64(Float64(x * Float64(y - a)) / Float64(z - a));
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = ((y - z) / (a - z)) * t;
	tmp = 0.0;
	if (t <= -7.9e-75)
		tmp = t_1;
	elseif (t <= 1.4e-39)
		tmp = (x * (y - a)) / (z - a);
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision]}, If[LessEqual[t, -7.9e-75], t$95$1, If[LessEqual[t, 1.4e-39], N[(N[(x * N[(y - a), $MachinePrecision]), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if t < -7.9e-75 or 1.4000000000000001e-39 < t

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]

   if -7.9e-75 < t < 1.4000000000000001e-39

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \color{blue}{x + \left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      3. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      4. frac-2neg N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{\mathsf{neg}\left(\left(t - x\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      5. associate-*r/ N/A

         \[\leadsto x + \color{blue}{\frac{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      6. add-to-fraction N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot \left(\mathsf{neg}\left(\left(a - z\right)\right)\right) + \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)}} \]

      8. lower-fma.f64 N/A

         \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(x, \mathsf{neg}\left(\left(a - z\right)\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(x, \mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right), \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      11. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, \color{blue}{z - a}, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \color{blue}{\left(y - z\right) \cdot \left(\mathsf{neg}\left(\left(t - x\right)\right)\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      13. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(\mathsf{neg}\left(\color{blue}{\left(t - x\right)}\right)\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      14. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      15. lower--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \color{blue}{\left(x - t\right)}\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \]

      16. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)} \]

      17. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

      18. lower--.f64 63.2

          \[\leadsto \frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{\color{blue}{z - a}} \]

   3. Applied rewrites 63.2%

      \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(x, z - a, \left(y - z\right) \cdot \left(x - t\right)\right)}{z - a}} \]

   4. Taylor expanded in x around inf

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot \color{blue}{\left(y - a\right)}}{z - a} \]

      2. lower--.f64 39.4

         \[\leadsto \frac{x \cdot \left(y - \color{blue}{a}\right)}{z - a} \]

   6. Applied rewrites 39.4%

      \[\leadsto \frac{\color{blue}{x \cdot \left(y - a\right)}}{z - a} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 12: 56.3% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := y \cdot \frac{t - x}{a - z}\\ t_2 := x + \frac{t \cdot y}{a}\\ \mathbf{if}\;a \leq -0.0021:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;a \leq -5 \cdot 10^{-173}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq 1.6 \cdot 10^{-30}:\\ \;\;\;\;\frac{y - z}{a - z} \cdot t\\ \mathbf{elif}\;a \leq 6.2 \cdot 10^{+35}:\\ \;\;\;\;t\_1\\ \mathbf{else}:\\ \;\;\;\;t\_2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (* y (/ (- t x) (- a z)))) (t_2 (+ x (/ (* t y) a))))
   (if (<= a -0.0021)
     t_2
     (if (<= a -5e-173)
       t_1
       (if (<= a 1.6e-30)
         (* (/ (- y z) (- a z)) t)
         (if (<= a 6.2e+35) t_1 t_2))))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = y * ((t - x) / (a - z));
	double t_2 = x + ((t * y) / a);
	double tmp;
	if (a <= -0.0021) {
		tmp = t_2;
	} else if (a <= -5e-173) {
		tmp = t_1;
	} else if (a <= 1.6e-30) {
		tmp = ((y - z) / (a - z)) * t;
	} else if (a <= 6.2e+35) {
		tmp = t_1;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = y * ((t - x) / (a - z))
    t_2 = x + ((t * y) / a)
    if (a <= (-0.0021d0)) then
        tmp = t_2
    else if (a <= (-5d-173)) then
        tmp = t_1
    else if (a <= 1.6d-30) then
        tmp = ((y - z) / (a - z)) * t
    else if (a <= 6.2d+35) then
        tmp = t_1
    else
        tmp = t_2
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = y * ((t - x) / (a - z));
	double t_2 = x + ((t * y) / a);
	double tmp;
	if (a <= -0.0021) {
		tmp = t_2;
	} else if (a <= -5e-173) {
		tmp = t_1;
	} else if (a <= 1.6e-30) {
		tmp = ((y - z) / (a - z)) * t;
	} else if (a <= 6.2e+35) {
		tmp = t_1;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = y * ((t - x) / (a - z))
	t_2 = x + ((t * y) / a)
	tmp = 0
	if a <= -0.0021:
		tmp = t_2
	elif a <= -5e-173:
		tmp = t_1
	elif a <= 1.6e-30:
		tmp = ((y - z) / (a - z)) * t
	elif a <= 6.2e+35:
		tmp = t_1
	else:
		tmp = t_2
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(y * Float64(Float64(t - x) / Float64(a - z)))
	t_2 = Float64(x + Float64(Float64(t * y) / a))
	tmp = 0.0
	if (a <= -0.0021)
		tmp = t_2;
	elseif (a <= -5e-173)
		tmp = t_1;
	elseif (a <= 1.6e-30)
		tmp = Float64(Float64(Float64(y - z) / Float64(a - z)) * t);
	elseif (a <= 6.2e+35)
		tmp = t_1;
	else
		tmp = t_2;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = y * ((t - x) / (a - z));
	t_2 = x + ((t * y) / a);
	tmp = 0.0;
	if (a <= -0.0021)
		tmp = t_2;
	elseif (a <= -5e-173)
		tmp = t_1;
	elseif (a <= 1.6e-30)
		tmp = ((y - z) / (a - z)) * t;
	elseif (a <= 6.2e+35)
		tmp = t_1;
	else
		tmp = t_2;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(y * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(t * y), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[a, -0.0021], t$95$2, If[LessEqual[a, -5e-173], t$95$1, If[LessEqual[a, 1.6e-30], N[(N[(N[(y - z), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision] * t), $MachinePrecision], If[LessEqual[a, 6.2e+35], t$95$1, t$95$2]]]]]]

Derivation

1. Split input into 3 regimes

2. if a < -0.00209999999999999987 or 6.19999999999999973e35 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]

   7. Taylor expanded in x around 0

      \[\leadsto x + \frac{t \cdot y}{a} \]
   8. Step-by-step derivation

      1. lower-*.f64 37.8

         \[\leadsto x + \frac{t \cdot y}{a} \]

   9. Applied rewrites 37.8%

      \[\leadsto x + \frac{t \cdot y}{a} \]

   if -0.00209999999999999987 < a < -5.0000000000000002e-173 or 1.6e-30 < a < 6.19999999999999973e35

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. mul-1-neg N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      3. lift-/.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      4. lift-*.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      5. lift--.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      6. associate-/l* N/A

         \[\leadsto \mathsf{neg}\left(y \cdot \frac{t - x}{z - a}\right) \]

      7. distribute-rgt-neg-in N/A

         \[\leadsto y \cdot \color{blue}{\left(\mathsf{neg}\left(\frac{t - x}{z - a}\right)\right)} \]

      8. distribute-frac-neg2 N/A

         \[\leadsto y \cdot \frac{t - x}{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}} \]

      9. lift--.f64 N/A

         \[\leadsto y \cdot \frac{t - x}{\mathsf{neg}\left(\left(z - a\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      11. lower-*.f64 N/A

          \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

      12. lift--.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      13. lower-/.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a - z}} \]

      14. lift--.f64 41.3

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a} - z} \]

   8. Applied rewrites 41.3%

      \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

   if -5.0000000000000002e-173 < a < 1.6e-30

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. associate-/l* N/A

         \[\leadsto t \cdot \color{blue}{\frac{z - y}{z - a}} \]

      4. *-commutative N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot \color{blue}{t} \]

      6. lift--.f64 N/A

         \[\leadsto \frac{z - y}{z - a} \cdot t \]

      7. sub-negate-rev N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      8. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      9. lift--.f64 N/A

         \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{z - a} \cdot t \]

      10. sub-negate-rev N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      11. lift--.f64 N/A

          \[\leadsto \frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\mathsf{neg}\left(\left(a - z\right)\right)} \cdot t \]

      12. frac-2neg-rev N/A

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

      13. lower-/.f64 51.6

          \[\leadsto \frac{y - z}{a - z} \cdot t \]

   8. Applied rewrites 51.6%

      \[\leadsto \frac{y - z}{a - z} \cdot \color{blue}{t} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 13: 55.6% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := y \cdot \frac{t - x}{a - z}\\ t_2 := x + \frac{t \cdot y}{a}\\ \mathbf{if}\;a \leq -0.0021:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;a \leq -5 \cdot 10^{-173}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq 1.55 \cdot 10^{-30}:\\ \;\;\;\;t \cdot \left(\frac{y}{a - z} - -1\right)\\ \mathbf{elif}\;a \leq 6.2 \cdot 10^{+35}:\\ \;\;\;\;t\_1\\ \mathbf{else}:\\ \;\;\;\;t\_2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (* y (/ (- t x) (- a z)))) (t_2 (+ x (/ (* t y) a))))
   (if (<= a -0.0021)
     t_2
     (if (<= a -5e-173)
       t_1
       (if (<= a 1.55e-30)
         (* t (- (/ y (- a z)) -1.0))
         (if (<= a 6.2e+35) t_1 t_2))))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = y * ((t - x) / (a - z));
	double t_2 = x + ((t * y) / a);
	double tmp;
	if (a <= -0.0021) {
		tmp = t_2;
	} else if (a <= -5e-173) {
		tmp = t_1;
	} else if (a <= 1.55e-30) {
		tmp = t * ((y / (a - z)) - -1.0);
	} else if (a <= 6.2e+35) {
		tmp = t_1;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = y * ((t - x) / (a - z))
    t_2 = x + ((t * y) / a)
    if (a <= (-0.0021d0)) then
        tmp = t_2
    else if (a <= (-5d-173)) then
        tmp = t_1
    else if (a <= 1.55d-30) then
        tmp = t * ((y / (a - z)) - (-1.0d0))
    else if (a <= 6.2d+35) then
        tmp = t_1
    else
        tmp = t_2
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = y * ((t - x) / (a - z));
	double t_2 = x + ((t * y) / a);
	double tmp;
	if (a <= -0.0021) {
		tmp = t_2;
	} else if (a <= -5e-173) {
		tmp = t_1;
	} else if (a <= 1.55e-30) {
		tmp = t * ((y / (a - z)) - -1.0);
	} else if (a <= 6.2e+35) {
		tmp = t_1;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = y * ((t - x) / (a - z))
	t_2 = x + ((t * y) / a)
	tmp = 0
	if a <= -0.0021:
		tmp = t_2
	elif a <= -5e-173:
		tmp = t_1
	elif a <= 1.55e-30:
		tmp = t * ((y / (a - z)) - -1.0)
	elif a <= 6.2e+35:
		tmp = t_1
	else:
		tmp = t_2
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(y * Float64(Float64(t - x) / Float64(a - z)))
	t_2 = Float64(x + Float64(Float64(t * y) / a))
	tmp = 0.0
	if (a <= -0.0021)
		tmp = t_2;
	elseif (a <= -5e-173)
		tmp = t_1;
	elseif (a <= 1.55e-30)
		tmp = Float64(t * Float64(Float64(y / Float64(a - z)) - -1.0));
	elseif (a <= 6.2e+35)
		tmp = t_1;
	else
		tmp = t_2;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = y * ((t - x) / (a - z));
	t_2 = x + ((t * y) / a);
	tmp = 0.0;
	if (a <= -0.0021)
		tmp = t_2;
	elseif (a <= -5e-173)
		tmp = t_1;
	elseif (a <= 1.55e-30)
		tmp = t * ((y / (a - z)) - -1.0);
	elseif (a <= 6.2e+35)
		tmp = t_1;
	else
		tmp = t_2;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(y * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(t * y), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[a, -0.0021], t$95$2, If[LessEqual[a, -5e-173], t$95$1, If[LessEqual[a, 1.55e-30], N[(t * N[(N[(y / N[(a - z), $MachinePrecision]), $MachinePrecision] - -1.0), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 6.2e+35], t$95$1, t$95$2]]]]]]

Derivation

1. Split input into 3 regimes

2. if a < -0.00209999999999999987 or 6.19999999999999973e35 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]

   7. Taylor expanded in x around 0

      \[\leadsto x + \frac{t \cdot y}{a} \]
   8. Step-by-step derivation

      1. lower-*.f64 37.8

         \[\leadsto x + \frac{t \cdot y}{a} \]

   9. Applied rewrites 37.8%

      \[\leadsto x + \frac{t \cdot y}{a} \]

   if -0.00209999999999999987 < a < -5.0000000000000002e-173 or 1.54999999999999995e-30 < a < 6.19999999999999973e35

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   7. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. mul-1-neg N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      3. lift-/.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      4. lift-*.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      5. lift--.f64 N/A

         \[\leadsto \mathsf{neg}\left(\frac{y \cdot \left(t - x\right)}{z - a}\right) \]

      6. associate-/l* N/A

         \[\leadsto \mathsf{neg}\left(y \cdot \frac{t - x}{z - a}\right) \]

      7. distribute-rgt-neg-in N/A

         \[\leadsto y \cdot \color{blue}{\left(\mathsf{neg}\left(\frac{t - x}{z - a}\right)\right)} \]

      8. distribute-frac-neg2 N/A

         \[\leadsto y \cdot \frac{t - x}{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}} \]

      9. lift--.f64 N/A

         \[\leadsto y \cdot \frac{t - x}{\mathsf{neg}\left(\left(z - a\right)\right)} \]

      10. sub-negate-rev N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      11. lower-*.f64 N/A

          \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

      12. lift--.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{a - \color{blue}{z}} \]

      13. lower-/.f64 N/A

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a - z}} \]

      14. lift--.f64 41.3

          \[\leadsto y \cdot \frac{t - x}{\color{blue}{a} - z} \]

   8. Applied rewrites 41.3%

      \[\leadsto y \cdot \color{blue}{\frac{t - x}{a - z}} \]

   if -5.0000000000000002e-173 < a < 1.54999999999999995e-30

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in z around inf

      \[\leadsto t \cdot \left(\frac{y}{a - z} - -1\right) \]
   6. Step-by-step derivation

   7. Applied rewrites 42.5%

      \[\leadsto t \cdot \left(\frac{y}{a - z} - -1\right) \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 14: 52.1% accurate, 0.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x + \frac{t \cdot y}{a}\\ \mathbf{if}\;a \leq -2.5 \cdot 10^{-38}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq -1.25 \cdot 10^{-172}:\\ \;\;\;\;\frac{x \cdot y}{z - a}\\ \mathbf{elif}\;a \leq 1.15 \cdot 10^{-29}:\\ \;\;\;\;t \cdot \left(\frac{y}{a - z} - -1\right)\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (+ x (/ (* t y) a))))
   (if (<= a -2.5e-38)
     t_1
     (if (<= a -1.25e-172)
       (/ (* x y) (- z a))
       (if (<= a 1.15e-29) (* t (- (/ y (- a z)) -1.0)) t_1)))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t * y) / a);
	double tmp;
	if (a <= -2.5e-38) {
		tmp = t_1;
	} else if (a <= -1.25e-172) {
		tmp = (x * y) / (z - a);
	} else if (a <= 1.15e-29) {
		tmp = t * ((y / (a - z)) - -1.0);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = x + ((t * y) / a)
    if (a <= (-2.5d-38)) then
        tmp = t_1
    else if (a <= (-1.25d-172)) then
        tmp = (x * y) / (z - a)
    else if (a <= 1.15d-29) then
        tmp = t * ((y / (a - z)) - (-1.0d0))
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t * y) / a);
	double tmp;
	if (a <= -2.5e-38) {
		tmp = t_1;
	} else if (a <= -1.25e-172) {
		tmp = (x * y) / (z - a);
	} else if (a <= 1.15e-29) {
		tmp = t * ((y / (a - z)) - -1.0);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = x + ((t * y) / a)
	tmp = 0
	if a <= -2.5e-38:
		tmp = t_1
	elif a <= -1.25e-172:
		tmp = (x * y) / (z - a)
	elif a <= 1.15e-29:
		tmp = t * ((y / (a - z)) - -1.0)
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(x + Float64(Float64(t * y) / a))
	tmp = 0.0
	if (a <= -2.5e-38)
		tmp = t_1;
	elseif (a <= -1.25e-172)
		tmp = Float64(Float64(x * y) / Float64(z - a));
	elseif (a <= 1.15e-29)
		tmp = Float64(t * Float64(Float64(y / Float64(a - z)) - -1.0));
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = x + ((t * y) / a);
	tmp = 0.0;
	if (a <= -2.5e-38)
		tmp = t_1;
	elseif (a <= -1.25e-172)
		tmp = (x * y) / (z - a);
	elseif (a <= 1.15e-29)
		tmp = t * ((y / (a - z)) - -1.0);
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(x + N[(N[(t * y), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[a, -2.5e-38], t$95$1, If[LessEqual[a, -1.25e-172], N[(N[(x * y), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 1.15e-29], N[(t * N[(N[(y / N[(a - z), $MachinePrecision]), $MachinePrecision] - -1.0), $MachinePrecision]), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 3 regimes

2. if a < -2.50000000000000017e-38 or 1.14999999999999996e-29 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]

   7. Taylor expanded in x around 0

      \[\leadsto x + \frac{t \cdot y}{a} \]
   8. Step-by-step derivation

      1. lower-*.f64 37.8

         \[\leadsto x + \frac{t \cdot y}{a} \]

   9. Applied rewrites 37.8%

      \[\leadsto x + \frac{t \cdot y}{a} \]

   if -2.50000000000000017e-38 < a < -1.25e-172

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]

   7. Taylor expanded in x around inf

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - \color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - a} \]

      3. lower--.f64 21.3

         \[\leadsto \frac{x \cdot y}{z - a} \]

   9. Applied rewrites 21.3%

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]

   if -1.25e-172 < a < 1.14999999999999996e-29

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in z around inf

      \[\leadsto t \cdot \left(\frac{y}{a - z} - -1\right) \]
   6. Step-by-step derivation

   7. Applied rewrites 42.5%

      \[\leadsto t \cdot \left(\frac{y}{a - z} - -1\right) \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 15: 44.8% accurate, 0.8× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x + \frac{t \cdot y}{a}\\ \mathbf{if}\;a \leq -2.5 \cdot 10^{-38}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;a \leq 9 \cdot 10^{-297}:\\ \;\;\;\;\frac{x \cdot y}{z - a}\\ \mathbf{elif}\;a \leq 2.35 \cdot 10^{-36}:\\ \;\;\;\;\frac{t \cdot \left(z - y\right)}{z}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (+ x (/ (* t y) a))))
   (if (<= a -2.5e-38)
     t_1
     (if (<= a 9e-297)
       (/ (* x y) (- z a))
       (if (<= a 2.35e-36) (/ (* t (- z y)) z) t_1)))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t * y) / a);
	double tmp;
	if (a <= -2.5e-38) {
		tmp = t_1;
	} else if (a <= 9e-297) {
		tmp = (x * y) / (z - a);
	} else if (a <= 2.35e-36) {
		tmp = (t * (z - y)) / z;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = x + ((t * y) / a)
    if (a <= (-2.5d-38)) then
        tmp = t_1
    else if (a <= 9d-297) then
        tmp = (x * y) / (z - a)
    else if (a <= 2.35d-36) then
        tmp = (t * (z - y)) / z
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = x + ((t * y) / a);
	double tmp;
	if (a <= -2.5e-38) {
		tmp = t_1;
	} else if (a <= 9e-297) {
		tmp = (x * y) / (z - a);
	} else if (a <= 2.35e-36) {
		tmp = (t * (z - y)) / z;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = x + ((t * y) / a)
	tmp = 0
	if a <= -2.5e-38:
		tmp = t_1
	elif a <= 9e-297:
		tmp = (x * y) / (z - a)
	elif a <= 2.35e-36:
		tmp = (t * (z - y)) / z
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(x + Float64(Float64(t * y) / a))
	tmp = 0.0
	if (a <= -2.5e-38)
		tmp = t_1;
	elseif (a <= 9e-297)
		tmp = Float64(Float64(x * y) / Float64(z - a));
	elseif (a <= 2.35e-36)
		tmp = Float64(Float64(t * Float64(z - y)) / z);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = x + ((t * y) / a);
	tmp = 0.0;
	if (a <= -2.5e-38)
		tmp = t_1;
	elseif (a <= 9e-297)
		tmp = (x * y) / (z - a);
	elseif (a <= 2.35e-36)
		tmp = (t * (z - y)) / z;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(x + N[(N[(t * y), $MachinePrecision] / a), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[a, -2.5e-38], t$95$1, If[LessEqual[a, 9e-297], N[(N[(x * y), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[a, 2.35e-36], N[(N[(t * N[(z - y), $MachinePrecision]), $MachinePrecision] / z), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 3 regimes

2. if a < -2.50000000000000017e-38 or 2.3500000000000001e-36 < a

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in z around 0

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{\color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

      3. lower--.f64 44.1

         \[\leadsto x + \frac{y \cdot \left(t - x\right)}{a} \]

   6. Applied rewrites 44.1%

      \[\leadsto x + \color{blue}{\frac{y \cdot \left(t - x\right)}{a}} \]

   7. Taylor expanded in x around 0

      \[\leadsto x + \frac{t \cdot y}{a} \]
   8. Step-by-step derivation

      1. lower-*.f64 37.8

         \[\leadsto x + \frac{t \cdot y}{a} \]

   9. Applied rewrites 37.8%

      \[\leadsto x + \frac{t \cdot y}{a} \]

   if -2.50000000000000017e-38 < a < 8.99999999999999951e-297

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]

   7. Taylor expanded in x around inf

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - \color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - a} \]

      3. lower--.f64 21.3

         \[\leadsto \frac{x \cdot y}{z - a} \]

   9. Applied rewrites 21.3%

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]

   if 8.99999999999999951e-297 < a < 2.3500000000000001e-36

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]

   7. Taylor expanded in a around 0

      \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

      3. lower--.f64 27.7

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

   9. Applied rewrites 27.7%

      \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 16: 41.8% accurate, 0.2× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{x \cdot y}{z - a}\\ t_2 := x + \left(y - z\right) \cdot \frac{t - x}{a - z}\\ \mathbf{if}\;t\_2 \leq -9.37 \cdot 10^{+236}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_2 \leq -1 \cdot 10^{-7}:\\ \;\;\;\;x + t\\ \mathbf{elif}\;t\_2 \leq -1 \cdot 10^{-191}:\\ \;\;\;\;\frac{t \cdot \left(y - z\right)}{a}\\ \mathbf{elif}\;t\_2 \leq 10^{-182}:\\ \;\;\;\;\frac{t \cdot \left(z - y\right)}{z}\\ \mathbf{elif}\;t\_2 \leq 5 \cdot 10^{+306}:\\ \;\;\;\;x + t\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (/ (* x y) (- z a))) (t_2 (+ x (* (- y z) (/ (- t x) (- a z))))))
   (if (<= t_2 -9.37e+236)
     t_1
     (if (<= t_2 -1e-7)
       (+ x t)
       (if (<= t_2 -1e-191)
         (/ (* t (- y z)) a)
         (if (<= t_2 1e-182)
           (/ (* t (- z y)) z)
           (if (<= t_2 5e+306) (+ x t) t_1)))))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = (x * y) / (z - a);
	double t_2 = x + ((y - z) * ((t - x) / (a - z)));
	double tmp;
	if (t_2 <= -9.37e+236) {
		tmp = t_1;
	} else if (t_2 <= -1e-7) {
		tmp = x + t;
	} else if (t_2 <= -1e-191) {
		tmp = (t * (y - z)) / a;
	} else if (t_2 <= 1e-182) {
		tmp = (t * (z - y)) / z;
	} else if (t_2 <= 5e+306) {
		tmp = x + t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = (x * y) / (z - a)
    t_2 = x + ((y - z) * ((t - x) / (a - z)))
    if (t_2 <= (-9.37d+236)) then
        tmp = t_1
    else if (t_2 <= (-1d-7)) then
        tmp = x + t
    else if (t_2 <= (-1d-191)) then
        tmp = (t * (y - z)) / a
    else if (t_2 <= 1d-182) then
        tmp = (t * (z - y)) / z
    else if (t_2 <= 5d+306) then
        tmp = x + t
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = (x * y) / (z - a);
	double t_2 = x + ((y - z) * ((t - x) / (a - z)));
	double tmp;
	if (t_2 <= -9.37e+236) {
		tmp = t_1;
	} else if (t_2 <= -1e-7) {
		tmp = x + t;
	} else if (t_2 <= -1e-191) {
		tmp = (t * (y - z)) / a;
	} else if (t_2 <= 1e-182) {
		tmp = (t * (z - y)) / z;
	} else if (t_2 <= 5e+306) {
		tmp = x + t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = (x * y) / (z - a)
	t_2 = x + ((y - z) * ((t - x) / (a - z)))
	tmp = 0
	if t_2 <= -9.37e+236:
		tmp = t_1
	elif t_2 <= -1e-7:
		tmp = x + t
	elif t_2 <= -1e-191:
		tmp = (t * (y - z)) / a
	elif t_2 <= 1e-182:
		tmp = (t * (z - y)) / z
	elif t_2 <= 5e+306:
		tmp = x + t
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(Float64(x * y) / Float64(z - a))
	t_2 = Float64(x + Float64(Float64(y - z) * Float64(Float64(t - x) / Float64(a - z))))
	tmp = 0.0
	if (t_2 <= -9.37e+236)
		tmp = t_1;
	elseif (t_2 <= -1e-7)
		tmp = Float64(x + t);
	elseif (t_2 <= -1e-191)
		tmp = Float64(Float64(t * Float64(y - z)) / a);
	elseif (t_2 <= 1e-182)
		tmp = Float64(Float64(t * Float64(z - y)) / z);
	elseif (t_2 <= 5e+306)
		tmp = Float64(x + t);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = (x * y) / (z - a);
	t_2 = x + ((y - z) * ((t - x) / (a - z)));
	tmp = 0.0;
	if (t_2 <= -9.37e+236)
		tmp = t_1;
	elseif (t_2 <= -1e-7)
		tmp = x + t;
	elseif (t_2 <= -1e-191)
		tmp = (t * (y - z)) / a;
	elseif (t_2 <= 1e-182)
		tmp = (t * (z - y)) / z;
	elseif (t_2 <= 5e+306)
		tmp = x + t;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(x * y), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - z), $MachinePrecision] * N[(N[(t - x), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$2, -9.37e+236], t$95$1, If[LessEqual[t$95$2, -1e-7], N[(x + t), $MachinePrecision], If[LessEqual[t$95$2, -1e-191], N[(N[(t * N[(y - z), $MachinePrecision]), $MachinePrecision] / a), $MachinePrecision], If[LessEqual[t$95$2, 1e-182], N[(N[(t * N[(z - y), $MachinePrecision]), $MachinePrecision] / z), $MachinePrecision], If[LessEqual[t$95$2, 5e+306], N[(x + t), $MachinePrecision], t$95$1]]]]]]]

Derivation

1. Split input into 4 regimes

2. if (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -9.36999999999999961e236 or 4.99999999999999993e306 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z))))

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]

   7. Taylor expanded in x around inf

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - \color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - a} \]

      3. lower--.f64 21.3

         \[\leadsto \frac{x \cdot y}{z - a} \]

   9. Applied rewrites 21.3%

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]

   if -9.36999999999999961e236 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -9.9999999999999995e-8 or 1e-182 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 4.99999999999999993e306

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around inf

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]
   3. Step-by-step derivation

      1. lower--.f64 20.2

         \[\leadsto x + \left(t - \color{blue}{x}\right) \]

   4. Applied rewrites 20.2%

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + t \]
   6. Step-by-step derivation

   7. Applied rewrites 35.4%

      \[\leadsto x + t \]

   if -9.9999999999999995e-8 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < -1e-191

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in a around inf

      \[\leadsto \frac{t \cdot \left(y - z\right)}{\color{blue}{a}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(y - z\right)}{a} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(y - z\right)}{a} \]

      3. lower--.f64 19.6

         \[\leadsto \frac{t \cdot \left(y - z\right)}{a} \]

   7. Applied rewrites 19.6%

      \[\leadsto \frac{t \cdot \left(y - z\right)}{\color{blue}{a}} \]

   if -1e-191 < (+.f64 x (*.f64 (-.f64 y z) (/.f64 (-.f64 t x) (-.f64 a z)))) < 1e-182

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z - a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z} - a} \]

      3. lower--.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - a} \]

      4. lower--.f64 39.6

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 39.6%

      \[\leadsto \color{blue}{\frac{t \cdot \left(z - y\right)}{z - a}} \]

   7. Taylor expanded in a around 0

      \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

      3. lower--.f64 27.7

         \[\leadsto \frac{t \cdot \left(z - y\right)}{z} \]

   9. Applied rewrites 27.7%

      \[\leadsto \frac{t \cdot \left(z - y\right)}{\color{blue}{z}} \]
3. Recombined 4 regimes into one program.
4. Add Preprocessing

Alternative 17: 41.6% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq -8.8 \cdot 10^{+119}:\\ \;\;\;\;\frac{x \cdot y}{z - a}\\ \mathbf{elif}\;y \leq 1.42 \cdot 10^{+76}:\\ \;\;\;\;x + t\\ \mathbf{else}:\\ \;\;\;\;\frac{t \cdot y}{a - z}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= y -8.8e+119)
   (/ (* x y) (- z a))
   (if (<= y 1.42e+76) (+ x t) (/ (* t y) (- a z)))))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= -8.8e+119) {
		tmp = (x * y) / (z - a);
	} else if (y <= 1.42e+76) {
		tmp = x + t;
	} else {
		tmp = (t * y) / (a - z);
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: tmp
    if (y <= (-8.8d+119)) then
        tmp = (x * y) / (z - a)
    else if (y <= 1.42d+76) then
        tmp = x + t
    else
        tmp = (t * y) / (a - z)
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= -8.8e+119) {
		tmp = (x * y) / (z - a);
	} else if (y <= 1.42e+76) {
		tmp = x + t;
	} else {
		tmp = (t * y) / (a - z);
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	tmp = 0
	if y <= -8.8e+119:
		tmp = (x * y) / (z - a)
	elif y <= 1.42e+76:
		tmp = x + t
	else:
		tmp = (t * y) / (a - z)
	return tmp

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (y <= -8.8e+119)
		tmp = Float64(Float64(x * y) / Float64(z - a));
	elseif (y <= 1.42e+76)
		tmp = Float64(x + t);
	else
		tmp = Float64(Float64(t * y) / Float64(a - z));
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	tmp = 0.0;
	if (y <= -8.8e+119)
		tmp = (x * y) / (z - a);
	elseif (y <= 1.42e+76)
		tmp = x + t;
	else
		tmp = (t * y) / (a - z);
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[y, -8.8e+119], N[(N[(x * y), $MachinePrecision] / N[(z - a), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 1.42e+76], N[(x + t), $MachinePrecision], N[(N[(t * y), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if y < -8.8000000000000005e119

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto x + \color{blue}{\left(y - z\right) \cdot \frac{t - x}{a - z}} \]

      2. lift-/.f64 N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{t - x}{a - z}} \]

      3. div-flip N/A

         \[\leadsto x + \left(y - z\right) \cdot \color{blue}{\frac{1}{\frac{a - z}{t - x}}} \]

      4. mult-flip-rev N/A

         \[\leadsto x + \color{blue}{\frac{y - z}{\frac{a - z}{t - x}}} \]

      5. lift--.f64 N/A

         \[\leadsto x + \frac{\color{blue}{y - z}}{\frac{a - z}{t - x}} \]

      6. sub-negate-rev N/A

         \[\leadsto x + \frac{\color{blue}{\mathsf{neg}\left(\left(z - y\right)\right)}}{\frac{a - z}{t - x}} \]

      7. sub-negate-rev N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)}\right)}{\frac{a - z}{t - x}} \]

      8. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)\right)\right)}{\frac{a - z}{t - x}} \]

      9. lift--.f64 N/A

         \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{a - z}}{t - x}} \]

      10. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\color{blue}{\mathsf{neg}\left(\left(z - a\right)\right)}}{t - x}} \]

      11. sub-negate-rev N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\color{blue}{\left(\mathsf{neg}\left(\left(a - z\right)\right)\right)}\right)}{t - x}} \]

      12. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)\right)\right)}{t - x}} \]

      13. distribute-frac-neg N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\left(\mathsf{neg}\left(\left(y - z\right)\right)\right)\right)}{\color{blue}{\mathsf{neg}\left(\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}\right)}} \]

      14. frac-2neg-rev N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      15. lower-/.f64 N/A

          \[\leadsto x + \color{blue}{\frac{\mathsf{neg}\left(\left(y - z\right)\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      16. lift--.f64 N/A

          \[\leadsto x + \frac{\mathsf{neg}\left(\color{blue}{\left(y - z\right)}\right)}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      17. sub-negate-rev N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      18. lower--.f64 N/A

          \[\leadsto x + \frac{\color{blue}{z - y}}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}} \]

      19. lower-/.f64 N/A

          \[\leadsto x + \frac{z - y}{\color{blue}{\frac{\mathsf{neg}\left(\left(a - z\right)\right)}{t - x}}} \]

      20. lift--.f64 N/A

          \[\leadsto x + \frac{z - y}{\frac{\mathsf{neg}\left(\color{blue}{\left(a - z\right)}\right)}{t - x}} \]

      21. sub-negate-rev N/A

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

      22. lower--.f64 79.5

          \[\leadsto x + \frac{z - y}{\frac{\color{blue}{z - a}}{t - x}} \]

   3. Applied rewrites 79.5%

      \[\leadsto x + \color{blue}{\frac{z - y}{\frac{z - a}{t - x}}} \]

   4. Taylor expanded in y around inf

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]
   5. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{\frac{y \cdot \left(t - x\right)}{z - a}} \]

      2. lower-/.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z - a}} \]

      3. lower-*.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{\color{blue}{z} - a} \]

      4. lower--.f64 N/A

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - a} \]

      5. lower--.f64 37.5

         \[\leadsto -1 \cdot \frac{y \cdot \left(t - x\right)}{z - \color{blue}{a}} \]

   6. Applied rewrites 37.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{y \cdot \left(t - x\right)}{z - a}} \]

   7. Taylor expanded in x around inf

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]
   8. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - \color{blue}{a}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot y}{z - a} \]

      3. lower--.f64 21.3

         \[\leadsto \frac{x \cdot y}{z - a} \]

   9. Applied rewrites 21.3%

      \[\leadsto \frac{x \cdot y}{\color{blue}{z - a}} \]

   if -8.8000000000000005e119 < y < 1.41999999999999996e76

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around inf

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]
   3. Step-by-step derivation

      1. lower--.f64 20.2

         \[\leadsto x + \left(t - \color{blue}{x}\right) \]

   4. Applied rewrites 20.2%

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + t \]
   6. Step-by-step derivation

   7. Applied rewrites 35.4%

      \[\leadsto x + t \]

   if 1.41999999999999996e76 < y

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in y around inf

      \[\leadsto \frac{t \cdot y}{\color{blue}{a - z}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot y}{a - \color{blue}{z}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot y}{a - z} \]

      3. lower--.f64 20.8

         \[\leadsto \frac{t \cdot y}{a - z} \]

   7. Applied rewrites 20.8%

      \[\leadsto \frac{t \cdot y}{\color{blue}{a - z}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 18: 41.0% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{t \cdot y}{a - z}\\ \mathbf{if}\;y \leq -1.25 \cdot 10^{+208}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;y \leq 1.42 \cdot 10^{+76}:\\ \;\;\;\;x + t\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (let* ((t_1 (/ (* t y) (- a z))))
   (if (<= y -1.25e+208) t_1 (if (<= y 1.42e+76) (+ x t) t_1))))

C

double code(double x, double y, double z, double t, double a) {
	double t_1 = (t * y) / (a - z);
	double tmp;
	if (y <= -1.25e+208) {
		tmp = t_1;
	} else if (y <= 1.42e+76) {
		tmp = x + t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: t_1
    real(8) :: tmp
    t_1 = (t * y) / (a - z)
    if (y <= (-1.25d+208)) then
        tmp = t_1
    else if (y <= 1.42d+76) then
        tmp = x + t
    else
        tmp = t_1
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double t_1 = (t * y) / (a - z);
	double tmp;
	if (y <= -1.25e+208) {
		tmp = t_1;
	} else if (y <= 1.42e+76) {
		tmp = x + t;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	t_1 = (t * y) / (a - z)
	tmp = 0
	if y <= -1.25e+208:
		tmp = t_1
	elif y <= 1.42e+76:
		tmp = x + t
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a)
	t_1 = Float64(Float64(t * y) / Float64(a - z))
	tmp = 0.0
	if (y <= -1.25e+208)
		tmp = t_1;
	elseif (y <= 1.42e+76)
		tmp = Float64(x + t);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	t_1 = (t * y) / (a - z);
	tmp = 0.0;
	if (y <= -1.25e+208)
		tmp = t_1;
	elseif (y <= 1.42e+76)
		tmp = x + t;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(t * y), $MachinePrecision] / N[(a - z), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[y, -1.25e+208], t$95$1, If[LessEqual[y, 1.42e+76], N[(x + t), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if y < -1.2500000000000001e208 or 1.41999999999999996e76 < y

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in y around inf

      \[\leadsto \frac{t \cdot y}{\color{blue}{a - z}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot y}{a - \color{blue}{z}} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{t \cdot y}{a - z} \]

      3. lower--.f64 20.8

         \[\leadsto \frac{t \cdot y}{a - z} \]

   7. Applied rewrites 20.8%

      \[\leadsto \frac{t \cdot y}{\color{blue}{a - z}} \]

   if -1.2500000000000001e208 < y < 1.41999999999999996e76

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around inf

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]
   3. Step-by-step derivation

      1. lower--.f64 20.2

         \[\leadsto x + \left(t - \color{blue}{x}\right) \]

   4. Applied rewrites 20.2%

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + t \]
   6. Step-by-step derivation

   7. Applied rewrites 35.4%

      \[\leadsto x + t \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 19: 38.6% accurate, 1.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq 3.1 \cdot 10^{+127}:\\ \;\;\;\;x + t\\ \mathbf{else}:\\ \;\;\;\;t \cdot \frac{y}{a}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= y 3.1e+127) (+ x t) (* t (/ y a))))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= 3.1e+127) {
		tmp = x + t;
	} else {
		tmp = t * (y / a);
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: tmp
    if (y <= 3.1d+127) then
        tmp = x + t
    else
        tmp = t * (y / a)
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= 3.1e+127) {
		tmp = x + t;
	} else {
		tmp = t * (y / a);
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	tmp = 0
	if y <= 3.1e+127:
		tmp = x + t
	else:
		tmp = t * (y / a)
	return tmp

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (y <= 3.1e+127)
		tmp = Float64(x + t);
	else
		tmp = Float64(t * Float64(y / a));
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	tmp = 0.0;
	if (y <= 3.1e+127)
		tmp = x + t;
	else
		tmp = t * (y / a);
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[y, 3.1e+127], N[(x + t), $MachinePrecision], N[(t * N[(y / a), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if y < 3.1000000000000002e127

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around inf

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]
   3. Step-by-step derivation

      1. lower--.f64 20.2

         \[\leadsto x + \left(t - \color{blue}{x}\right) \]

   4. Applied rewrites 20.2%

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + t \]
   6. Step-by-step derivation

   7. Applied rewrites 35.4%

      \[\leadsto x + t \]

   if 3.1000000000000002e127 < y

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in z around 0

      \[\leadsto t \cdot \frac{y}{\color{blue}{a}} \]
   6. Step-by-step derivation

      1. lower-/.f64 18.7

         \[\leadsto t \cdot \frac{y}{a} \]

   7. Applied rewrites 18.7%

      \[\leadsto t \cdot \frac{y}{\color{blue}{a}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 20: 37.7% accurate, 1.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;y \leq 4.6 \cdot 10^{+128}:\\ \;\;\;\;x + t\\ \mathbf{else}:\\ \;\;\;\;\frac{t \cdot y}{a}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a)
 :precision binary64
 (if (<= y 4.6e+128) (+ x t) (/ (* t y) a)))

C

double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= 4.6e+128) {
		tmp = x + t;
	} else {
		tmp = (t * y) / a;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8) :: tmp
    if (y <= 4.6d+128) then
        tmp = x + t
    else
        tmp = (t * y) / a
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	double tmp;
	if (y <= 4.6e+128) {
		tmp = x + t;
	} else {
		tmp = (t * y) / a;
	}
	return tmp;
}

Python

def code(x, y, z, t, a):
	tmp = 0
	if y <= 4.6e+128:
		tmp = x + t
	else:
		tmp = (t * y) / a
	return tmp

Julia

function code(x, y, z, t, a)
	tmp = 0.0
	if (y <= 4.6e+128)
		tmp = Float64(x + t);
	else
		tmp = Float64(Float64(t * y) / a);
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a)
	tmp = 0.0;
	if (y <= 4.6e+128)
		tmp = x + t;
	else
		tmp = (t * y) / a;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_] := If[LessEqual[y, 4.6e+128], N[(x + t), $MachinePrecision], N[(N[(t * y), $MachinePrecision] / a), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if y < 4.59999999999999996e128

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in z around inf

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]
   3. Step-by-step derivation

      1. lower--.f64 20.2

         \[\leadsto x + \left(t - \color{blue}{x}\right) \]

   4. Applied rewrites 20.2%

      \[\leadsto x + \color{blue}{\left(t - x\right)} \]

   5. Taylor expanded in x around 0

      \[\leadsto x + t \]
   6. Step-by-step derivation

   7. Applied rewrites 35.4%

      \[\leadsto x + t \]

   if 4.59999999999999996e128 < y

   1. Initial program 79.5%

      \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

   2. Taylor expanded in t around inf

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto t \cdot \color{blue}{\left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

      2. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \color{blue}{\frac{z}{a - z}}\right) \]

      3. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{\color{blue}{z}}{a - z}\right) \]

      4. lower--.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right) \]

      5. lower-/.f64 N/A

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{\color{blue}{a - z}}\right) \]

      6. lower--.f64 51.6

         \[\leadsto t \cdot \left(\frac{y}{a - z} - \frac{z}{a - \color{blue}{z}}\right) \]

   4. Applied rewrites 51.6%

      \[\leadsto \color{blue}{t \cdot \left(\frac{y}{a - z} - \frac{z}{a - z}\right)} \]

   5. Taylor expanded in z around 0

      \[\leadsto \frac{t \cdot y}{\color{blue}{a}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{t \cdot y}{a} \]

      2. lower-*.f64 16.4

         \[\leadsto \frac{t \cdot y}{a} \]

   7. Applied rewrites 16.4%

      \[\leadsto \frac{t \cdot y}{\color{blue}{a}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 21: 35.4% accurate, 4.8× speedup

Math

\[\begin{array}{l} \\ x + t \end{array} \]

FPCore

(FPCore (x y z t a) :precision binary64 (+ x t))

C

double code(double x, double y, double z, double t, double a) {
	return x + t;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(x, y, z, t, a)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = x + t
end function

Java

public static double code(double x, double y, double z, double t, double a) {
	return x + t;
}

Python

def code(x, y, z, t, a):
	return x + t

Julia

function code(x, y, z, t, a)
	return Float64(x + t)
end

MATLAB

function tmp = code(x, y, z, t, a)
	tmp = x + t;
end

Wolfram

code[x_, y_, z_, t_, a_] := N[(x + t), $MachinePrecision]

Derivation

1. Initial program 79.5%

   \[x + \left(y - z\right) \cdot \frac{t - x}{a - z} \]

2. Taylor expanded in z around inf

   \[\leadsto x + \color{blue}{\left(t - x\right)} \]
3. Step-by-step derivation

   1. lower--.f64 20.2

      \[\leadsto x + \left(t - \color{blue}{x}\right) \]

4. Applied rewrites 20.2%

   \[\leadsto x + \color{blue}{\left(t - x\right)} \]

5. Taylor expanded in x around 0

   \[\leadsto x + t \]
6. Step-by-step derivation

7. Applied rewrites 35.4%

   \[\leadsto x + t \]
8. Add Preprocessing

Reproduce

herbie shell --seed 2025156 
(FPCore (x y z t a)
  :name "Numeric.Signal:interpolate   from hsignal-0.2.7.1"
  :precision binary64
  (+ x (* (- y z) (/ (- t x) (- a z)))))