Numeric.SpecFunctions:incompleteBetaWorker from math-functions-0.1.5.2, A

Percentage Accurate: 98.5% → 98.5%

Time: 5.4s

Alternatives: 10

Speedup: 1.0×

• 45.7% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (/ (* x (exp (- (+ (* y (log z)) (* (- t 1.0) (log a))) b))) y))

C

double code(double x, double y, double z, double t, double a, double b) {
	return (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
}

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, b)
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), intent (in) :: b
    code = (x * exp((((y * log(z)) + ((t - 1.0d0) * log(a))) - b))) / y
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return (x * Math.exp((((y * Math.log(z)) + ((t - 1.0) * Math.log(a))) - b))) / y;
}

Python

def code(x, y, z, t, a, b):
	return (x * math.exp((((y * math.log(z)) + ((t - 1.0) * math.log(a))) - b))) / y

Julia

function code(x, y, z, t, a, b)
	return Float64(Float64(x * exp(Float64(Float64(Float64(y * log(z)) + Float64(Float64(t - 1.0) * log(a))) - b))) / y)
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(N[(x * N[Exp[N[(N[(N[(y * N[Log[z], $MachinePrecision]), $MachinePrecision] + N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]

Initial Program: 98.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (/ (* x (exp (- (+ (* y (log z)) (* (- t 1.0) (log a))) b))) y))

C

double code(double x, double y, double z, double t, double a, double b) {
	return (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
}

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, b)
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), intent (in) :: b
    code = (x * exp((((y * log(z)) + ((t - 1.0d0) * log(a))) - b))) / y
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return (x * Math.exp((((y * Math.log(z)) + ((t - 1.0) * Math.log(a))) - b))) / y;
}

Python

def code(x, y, z, t, a, b):
	return (x * math.exp((((y * math.log(z)) + ((t - 1.0) * math.log(a))) - b))) / y

Julia

function code(x, y, z, t, a, b)
	return Float64(Float64(x * exp(Float64(Float64(Float64(y * log(z)) + Float64(Float64(t - 1.0) * log(a))) - b))) / y)
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(N[(x * N[Exp[N[(N[(N[(y * N[Log[z], $MachinePrecision]), $MachinePrecision] + N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]

Alternative 1: 98.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (/ (* x (exp (- (+ (* y (log z)) (* (- t 1.0) (log a))) b))) y))

C

double code(double x, double y, double z, double t, double a, double b) {
	return (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
}

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, b)
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), intent (in) :: b
    code = (x * exp((((y * log(z)) + ((t - 1.0d0) * log(a))) - b))) / y
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return (x * Math.exp((((y * Math.log(z)) + ((t - 1.0) * Math.log(a))) - b))) / y;
}

Python

def code(x, y, z, t, a, b):
	return (x * math.exp((((y * math.log(z)) + ((t - 1.0) * math.log(a))) - b))) / y

Julia

function code(x, y, z, t, a, b)
	return Float64(Float64(x * exp(Float64(Float64(Float64(y * log(z)) + Float64(Float64(t - 1.0) * log(a))) - b))) / y)
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = (x * exp((((y * log(z)) + ((t - 1.0) * log(a))) - b))) / y;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(N[(x * N[Exp[N[(N[(N[(y * N[Log[z], $MachinePrecision]), $MachinePrecision] + N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]

Derivation

1. Initial program 98.5%

   \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
2. Add Preprocessing

Alternative 2: 90.7% accurate, 0.9× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;t \leq -3.1 \cdot 10^{+49}:\\ \;\;\;\;\frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{elif}\;t \leq 1.52 \cdot 10^{+78}:\\ \;\;\;\;x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y}\\ \mathbf{else}:\\ \;\;\;\;\frac{x \cdot e^{\log a \cdot \left(t - 1\right) - b}}{y}\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (if (<= t -3.1e+49)
   (/ (* x (exp (* (log a) t))) y)
   (if (<= t 1.52e+78)
     (* x (/ (exp (- (fma (log z) y (- (log a))) b)) y))
     (/ (* x (exp (- (* (log a) (- t 1.0)) b))) y))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double tmp;
	if (t <= -3.1e+49) {
		tmp = (x * exp((log(a) * t))) / y;
	} else if (t <= 1.52e+78) {
		tmp = x * (exp((fma(log(z), y, -log(a)) - b)) / y);
	} else {
		tmp = (x * exp(((log(a) * (t - 1.0)) - b))) / y;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a, b)
	tmp = 0.0
	if (t <= -3.1e+49)
		tmp = Float64(Float64(x * exp(Float64(log(a) * t))) / y);
	elseif (t <= 1.52e+78)
		tmp = Float64(x * Float64(exp(Float64(fma(log(z), y, Float64(-log(a))) - b)) / y));
	else
		tmp = Float64(Float64(x * exp(Float64(Float64(log(a) * Float64(t - 1.0)) - b))) / y);
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := If[LessEqual[t, -3.1e+49], N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision], If[LessEqual[t, 1.52e+78], N[(x * N[(N[Exp[N[(N[(N[Log[z], $MachinePrecision] * y + (-N[Log[a], $MachinePrecision])), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], N[(N[(x * N[Exp[N[(N[(N[Log[a], $MachinePrecision] * N[(t - 1.0), $MachinePrecision]), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if t < -3.09999999999999992e49

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -3.09999999999999992e49 < t < 1.52e78

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{\frac{x \cdot e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y}} \]
   3. Step-by-step derivation

      1. associate-/l* N/A

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

      2. lower-*.f64 N/A

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

      3. lower-/.f64 N/A

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

      4. lower-exp.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      5. lower--.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      6. +-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(y \cdot \log z + -1 \cdot \log a\right) - b}}{y} \]

      7. *-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(\log z \cdot y + -1 \cdot \log a\right) - b}}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. mul-1-neg N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, \mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      11. lower-neg.f64 N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

      12. lift-log.f64 80.2

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

   4. Applied rewrites 80.2%

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

   if 1.52e78 < t

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in y around 0

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot \left(t - 1\right)} - b}}{y} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

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

      2. lift-log.f64 N/A

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

      3. lift--.f64 80.9

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

   4. Applied rewrites 80.9%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot \left(t - 1\right)} - b}}{y} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 3: 87.6% accurate, 1.1× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{e^{\log z \cdot y} \cdot x}{y}\\ \mathbf{if}\;y \leq -150000000000:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;y \leq 5.2 \cdot 10^{+215}:\\ \;\;\;\;\frac{x \cdot e^{\log a \cdot \left(t - 1\right) - b}}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (/ (* (exp (* (log z) y)) x) y)))
   (if (<= y -150000000000.0)
     t_1
     (if (<= y 5.2e+215) (/ (* x (exp (- (* (log a) (- t 1.0)) b))) y) t_1))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (exp((log(z) * y)) * x) / y;
	double tmp;
	if (y <= -150000000000.0) {
		tmp = t_1;
	} else if (y <= 5.2e+215) {
		tmp = (x * exp(((log(a) * (t - 1.0)) - b))) / y;
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: tmp
    t_1 = (exp((log(z) * y)) * x) / y
    if (y <= (-150000000000.0d0)) then
        tmp = t_1
    else if (y <= 5.2d+215) then
        tmp = (x * exp(((log(a) * (t - 1.0d0)) - b))) / y
    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 b) {
	double t_1 = (Math.exp((Math.log(z) * y)) * x) / y;
	double tmp;
	if (y <= -150000000000.0) {
		tmp = t_1;
	} else if (y <= 5.2e+215) {
		tmp = (x * Math.exp(((Math.log(a) * (t - 1.0)) - b))) / y;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (math.exp((math.log(z) * y)) * x) / y
	tmp = 0
	if y <= -150000000000.0:
		tmp = t_1
	elif y <= 5.2e+215:
		tmp = (x * math.exp(((math.log(a) * (t - 1.0)) - b))) / y
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(exp(Float64(log(z) * y)) * x) / y)
	tmp = 0.0
	if (y <= -150000000000.0)
		tmp = t_1;
	elseif (y <= 5.2e+215)
		tmp = Float64(Float64(x * exp(Float64(Float64(log(a) * Float64(t - 1.0)) - b))) / y);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (exp((log(z) * y)) * x) / y;
	tmp = 0.0;
	if (y <= -150000000000.0)
		tmp = t_1;
	elseif (y <= 5.2e+215)
		tmp = (x * exp(((log(a) * (t - 1.0)) - b))) / y;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(N[Exp[N[(N[Log[z], $MachinePrecision] * y), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[y, -150000000000.0], t$95$1, If[LessEqual[y, 5.2e+215], N[(N[(x * N[Exp[N[(N[(N[Log[a], $MachinePrecision] * N[(t - 1.0), $MachinePrecision]), $MachinePrecision] - b), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if y < -1.5e11 or 5.2000000000000001e215 < y

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
   2. Step-by-step derivation

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-exp.f64 N/A

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

      4. lift--.f64 N/A

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

      5. lift-+.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. lift-log.f64 N/A

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

      8. lift-*.f64 N/A

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

      9. lift--.f64 N/A

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

      10. lift-log.f64 N/A

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

      11. mult-flip N/A

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

      12. lower-*.f64 N/A

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

   3. Applied rewrites 98.5%

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

   4. Taylor expanded in y around inf

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

      1. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      2. +-commutative N/A

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

      3. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      4. *-commutative N/A

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

      5. lower-*.f64 N/A

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

      6. +-commutative N/A

         \[\leadsto \left(e^{\left(\frac{\log a \cdot \left(t - 1\right)}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      7. associate-/l* N/A

         \[\leadsto \left(e^{\left(\log a \cdot \frac{t - 1}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. lower-/.f64 N/A

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

      11. lift--.f64 N/A

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

      12. lift-log.f64 97.2

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

   6. Applied rewrites 97.2%

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

   7. Taylor expanded in y around inf

      \[\leadsto \left(e^{\color{blue}{y \cdot \log z}} \cdot x\right) \cdot \frac{1}{y} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      3. lift-log.f64 47.6

         \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y} \]

   9. Applied rewrites 47.6%

      \[\leadsto \left(e^{\color{blue}{\log z \cdot y}} \cdot x\right) \cdot \frac{1}{y} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \color{blue}{\left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y}} \]

       2. lift-/.f64 N/A

          \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \color{blue}{\frac{1}{y}} \]

       3. mult-flip-rev N/A

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

       4. lower-/.f64 47.6

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   11. Applied rewrites 47.6%

       \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   if -1.5e11 < y < 5.2000000000000001e215

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in y around 0

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot \left(t - 1\right)} - b}}{y} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

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

      2. lift-log.f64 N/A

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

      3. lift--.f64 80.9

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

   4. Applied rewrites 80.9%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot \left(t - 1\right)} - b}}{y} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 4: 73.2% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \left(t - 1\right) \cdot \log a\\ t_2 := \frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{if}\;t\_1 \leq -1 \cdot 10^{+42}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 130:\\ \;\;\;\;x \cdot \frac{e^{\left(-\log a\right) - b}}{y}\\ \mathbf{elif}\;t\_1 \leq 50000:\\ \;\;\;\;\frac{e^{\log z \cdot y} \cdot x}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (* (- t 1.0) (log a))) (t_2 (/ (* x (exp (* (log a) t))) y)))
   (if (<= t_1 -1e+42)
     t_2
     (if (<= t_1 130.0)
       (* x (/ (exp (- (- (log a)) b)) y))
       (if (<= t_1 50000.0) (/ (* (exp (* (log z) y)) x) y) t_2)))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (t - 1.0) * log(a);
	double t_2 = (x * exp((log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = x * (exp((-log(a) - b)) / y);
	} else if (t_1 <= 50000.0) {
		tmp = (exp((log(z) * y)) * x) / y;
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = (t - 1.0d0) * log(a)
    t_2 = (x * exp((log(a) * t))) / y
    if (t_1 <= (-1d+42)) then
        tmp = t_2
    else if (t_1 <= 130.0d0) then
        tmp = x * (exp((-log(a) - b)) / y)
    else if (t_1 <= 50000.0d0) then
        tmp = (exp((log(z) * y)) * x) / y
    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 b) {
	double t_1 = (t - 1.0) * Math.log(a);
	double t_2 = (x * Math.exp((Math.log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = x * (Math.exp((-Math.log(a) - b)) / y);
	} else if (t_1 <= 50000.0) {
		tmp = (Math.exp((Math.log(z) * y)) * x) / y;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (t - 1.0) * math.log(a)
	t_2 = (x * math.exp((math.log(a) * t))) / y
	tmp = 0
	if t_1 <= -1e+42:
		tmp = t_2
	elif t_1 <= 130.0:
		tmp = x * (math.exp((-math.log(a) - b)) / y)
	elif t_1 <= 50000.0:
		tmp = (math.exp((math.log(z) * y)) * x) / y
	else:
		tmp = t_2
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(t - 1.0) * log(a))
	t_2 = Float64(Float64(x * exp(Float64(log(a) * t))) / y)
	tmp = 0.0
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = Float64(x * Float64(exp(Float64(Float64(-log(a)) - b)) / y));
	elseif (t_1 <= 50000.0)
		tmp = Float64(Float64(exp(Float64(log(z) * y)) * x) / y);
	else
		tmp = t_2;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (t - 1.0) * log(a);
	t_2 = (x * exp((log(a) * t))) / y;
	tmp = 0.0;
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = x * (exp((-log(a) - b)) / y);
	elseif (t_1 <= 50000.0)
		tmp = (exp((log(z) * y)) * x) / y;
	else
		tmp = t_2;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[t$95$1, -1e+42], t$95$2, If[LessEqual[t$95$1, 130.0], N[(x * N[(N[Exp[N[((-N[Log[a], $MachinePrecision]) - b), $MachinePrecision]], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$1, 50000.0], N[(N[(N[Exp[N[(N[Log[z], $MachinePrecision] * y), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision], t$95$2]]]]]

Derivation

1. Split input into 3 regimes

2. if (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < -1.00000000000000004e42 or 5e4 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a))

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -1.00000000000000004e42 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 130

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{\frac{x \cdot e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y}} \]
   3. Step-by-step derivation

      1. associate-/l* N/A

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

      2. lower-*.f64 N/A

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

      3. lower-/.f64 N/A

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

      4. lower-exp.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      5. lower--.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      6. +-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(y \cdot \log z + -1 \cdot \log a\right) - b}}{y} \]

      7. *-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(\log z \cdot y + -1 \cdot \log a\right) - b}}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. mul-1-neg N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, \mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      11. lower-neg.f64 N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

      12. lift-log.f64 80.2

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

   4. Applied rewrites 80.2%

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

   5. Taylor expanded in y around 0

      \[\leadsto x \cdot \frac{e^{-1 \cdot \log a - b}}{y} \]
   6. Step-by-step derivation

      1. mul-1-neg N/A

         \[\leadsto x \cdot \frac{e^{\left(\mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      2. lift-neg.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-\log a\right) - b}}{y} \]

      3. lift-log.f64 59.1

         \[\leadsto x \cdot \frac{e^{\left(-\log a\right) - b}}{y} \]

   7. Applied rewrites 59.1%

      \[\leadsto x \cdot \frac{e^{\left(-\log a\right) - b}}{y} \]

   if 130 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 5e4

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
   2. Step-by-step derivation

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-exp.f64 N/A

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

      4. lift--.f64 N/A

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

      5. lift-+.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. lift-log.f64 N/A

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

      8. lift-*.f64 N/A

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

      9. lift--.f64 N/A

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

      10. lift-log.f64 N/A

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

      11. mult-flip N/A

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

      12. lower-*.f64 N/A

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

   3. Applied rewrites 98.5%

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

   4. Taylor expanded in y around inf

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

      1. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      2. +-commutative N/A

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

      3. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      4. *-commutative N/A

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

      5. lower-*.f64 N/A

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

      6. +-commutative N/A

         \[\leadsto \left(e^{\left(\frac{\log a \cdot \left(t - 1\right)}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      7. associate-/l* N/A

         \[\leadsto \left(e^{\left(\log a \cdot \frac{t - 1}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. lower-/.f64 N/A

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

      11. lift--.f64 N/A

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

      12. lift-log.f64 97.2

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

   6. Applied rewrites 97.2%

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

   7. Taylor expanded in y around inf

      \[\leadsto \left(e^{\color{blue}{y \cdot \log z}} \cdot x\right) \cdot \frac{1}{y} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      3. lift-log.f64 47.6

         \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y} \]

   9. Applied rewrites 47.6%

      \[\leadsto \left(e^{\color{blue}{\log z \cdot y}} \cdot x\right) \cdot \frac{1}{y} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \color{blue}{\left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y}} \]

       2. lift-/.f64 N/A

          \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \color{blue}{\frac{1}{y}} \]

       3. mult-flip-rev N/A

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

       4. lower-/.f64 47.6

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   11. Applied rewrites 47.6%

       \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 5: 72.6% accurate, 1.1× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{if}\;t \leq -7.6 \cdot 10^{+48}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t \leq -5.9 \cdot 10^{-95}:\\ \;\;\;\;\frac{e^{\log z \cdot y} \cdot x}{y}\\ \mathbf{elif}\;t \leq 5.2 \cdot 10^{+38}:\\ \;\;\;\;\frac{e^{\left(-b\right) - \log a} \cdot x}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (/ (* x (exp (* (log a) t))) y)))
   (if (<= t -7.6e+48)
     t_1
     (if (<= t -5.9e-95)
       (/ (* (exp (* (log z) y)) x) y)
       (if (<= t 5.2e+38) (/ (* (exp (- (- b) (log a))) x) y) t_1)))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (x * exp((log(a) * t))) / y;
	double tmp;
	if (t <= -7.6e+48) {
		tmp = t_1;
	} else if (t <= -5.9e-95) {
		tmp = (exp((log(z) * y)) * x) / y;
	} else if (t <= 5.2e+38) {
		tmp = (exp((-b - log(a))) * x) / y;
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: tmp
    t_1 = (x * exp((log(a) * t))) / y
    if (t <= (-7.6d+48)) then
        tmp = t_1
    else if (t <= (-5.9d-95)) then
        tmp = (exp((log(z) * y)) * x) / y
    else if (t <= 5.2d+38) then
        tmp = (exp((-b - log(a))) * x) / y
    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 b) {
	double t_1 = (x * Math.exp((Math.log(a) * t))) / y;
	double tmp;
	if (t <= -7.6e+48) {
		tmp = t_1;
	} else if (t <= -5.9e-95) {
		tmp = (Math.exp((Math.log(z) * y)) * x) / y;
	} else if (t <= 5.2e+38) {
		tmp = (Math.exp((-b - Math.log(a))) * x) / y;
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (x * math.exp((math.log(a) * t))) / y
	tmp = 0
	if t <= -7.6e+48:
		tmp = t_1
	elif t <= -5.9e-95:
		tmp = (math.exp((math.log(z) * y)) * x) / y
	elif t <= 5.2e+38:
		tmp = (math.exp((-b - math.log(a))) * x) / y
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(x * exp(Float64(log(a) * t))) / y)
	tmp = 0.0
	if (t <= -7.6e+48)
		tmp = t_1;
	elseif (t <= -5.9e-95)
		tmp = Float64(Float64(exp(Float64(log(z) * y)) * x) / y);
	elseif (t <= 5.2e+38)
		tmp = Float64(Float64(exp(Float64(Float64(-b) - log(a))) * x) / y);
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (x * exp((log(a) * t))) / y;
	tmp = 0.0;
	if (t <= -7.6e+48)
		tmp = t_1;
	elseif (t <= -5.9e-95)
		tmp = (exp((log(z) * y)) * x) / y;
	elseif (t <= 5.2e+38)
		tmp = (exp((-b - log(a))) * x) / y;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[t, -7.6e+48], t$95$1, If[LessEqual[t, -5.9e-95], N[(N[(N[Exp[N[(N[Log[z], $MachinePrecision] * y), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision], If[LessEqual[t, 5.2e+38], N[(N[(N[Exp[N[((-b) - N[Log[a], $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision], t$95$1]]]]

Derivation

1. Split input into 3 regimes

2. if t < -7.60000000000000001e48 or 5.1999999999999998e38 < t

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -7.60000000000000001e48 < t < -5.8999999999999998e-95

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
   2. Step-by-step derivation

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-exp.f64 N/A

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

      4. lift--.f64 N/A

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

      5. lift-+.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. lift-log.f64 N/A

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

      8. lift-*.f64 N/A

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

      9. lift--.f64 N/A

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

      10. lift-log.f64 N/A

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

      11. mult-flip N/A

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

      12. lower-*.f64 N/A

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

   3. Applied rewrites 98.5%

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

   4. Taylor expanded in y around inf

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

      1. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      2. +-commutative N/A

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

      3. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      4. *-commutative N/A

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

      5. lower-*.f64 N/A

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

      6. +-commutative N/A

         \[\leadsto \left(e^{\left(\frac{\log a \cdot \left(t - 1\right)}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      7. associate-/l* N/A

         \[\leadsto \left(e^{\left(\log a \cdot \frac{t - 1}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. lower-/.f64 N/A

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

      11. lift--.f64 N/A

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

      12. lift-log.f64 97.2

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

   6. Applied rewrites 97.2%

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

   7. Taylor expanded in y around inf

      \[\leadsto \left(e^{\color{blue}{y \cdot \log z}} \cdot x\right) \cdot \frac{1}{y} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      3. lift-log.f64 47.6

         \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y} \]

   9. Applied rewrites 47.6%

      \[\leadsto \left(e^{\color{blue}{\log z \cdot y}} \cdot x\right) \cdot \frac{1}{y} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \color{blue}{\left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y}} \]

       2. lift-/.f64 N/A

          \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \color{blue}{\frac{1}{y}} \]

       3. mult-flip-rev N/A

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

       4. lower-/.f64 47.6

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   11. Applied rewrites 47.6%

       \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   if -5.8999999999999998e-95 < t < 5.1999999999999998e38

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{\frac{x \cdot e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y}} \]
   3. Step-by-step derivation

      1. associate-/l* N/A

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

      2. lower-*.f64 N/A

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

      3. lower-/.f64 N/A

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

      4. lower-exp.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      5. lower--.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      6. +-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(y \cdot \log z + -1 \cdot \log a\right) - b}}{y} \]

      7. *-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(\log z \cdot y + -1 \cdot \log a\right) - b}}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. mul-1-neg N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, \mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      11. lower-neg.f64 N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

      12. lift-log.f64 80.2

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

   4. Applied rewrites 80.2%

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

   5. Taylor expanded in y around 0

      \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{\color{blue}{y}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{y} \]

      2. *-commutative N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      3. lower-*.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      4. lower-exp.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      5. add-negate N/A

         \[\leadsto \frac{e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot x}{y} \]

      6. lift-neg.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      7. lower--.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      8. lift-log.f64 59.5

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

   7. Applied rewrites 59.5%

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

Alternative 6: 69.6% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \left(t - 1\right) \cdot \log a\\ t_2 := \frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{if}\;t\_1 \leq -1 \cdot 10^{+42}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 130:\\ \;\;\;\;e^{\left(-b\right) - \log a} \cdot \frac{x}{y}\\ \mathbf{elif}\;t\_1 \leq 50000:\\ \;\;\;\;\frac{e^{\log z \cdot y} \cdot x}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (* (- t 1.0) (log a))) (t_2 (/ (* x (exp (* (log a) t))) y)))
   (if (<= t_1 -1e+42)
     t_2
     (if (<= t_1 130.0)
       (* (exp (- (- b) (log a))) (/ x y))
       (if (<= t_1 50000.0) (/ (* (exp (* (log z) y)) x) y) t_2)))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (t - 1.0) * log(a);
	double t_2 = (x * exp((log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = exp((-b - log(a))) * (x / y);
	} else if (t_1 <= 50000.0) {
		tmp = (exp((log(z) * y)) * x) / y;
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = (t - 1.0d0) * log(a)
    t_2 = (x * exp((log(a) * t))) / y
    if (t_1 <= (-1d+42)) then
        tmp = t_2
    else if (t_1 <= 130.0d0) then
        tmp = exp((-b - log(a))) * (x / y)
    else if (t_1 <= 50000.0d0) then
        tmp = (exp((log(z) * y)) * x) / y
    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 b) {
	double t_1 = (t - 1.0) * Math.log(a);
	double t_2 = (x * Math.exp((Math.log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = Math.exp((-b - Math.log(a))) * (x / y);
	} else if (t_1 <= 50000.0) {
		tmp = (Math.exp((Math.log(z) * y)) * x) / y;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (t - 1.0) * math.log(a)
	t_2 = (x * math.exp((math.log(a) * t))) / y
	tmp = 0
	if t_1 <= -1e+42:
		tmp = t_2
	elif t_1 <= 130.0:
		tmp = math.exp((-b - math.log(a))) * (x / y)
	elif t_1 <= 50000.0:
		tmp = (math.exp((math.log(z) * y)) * x) / y
	else:
		tmp = t_2
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(t - 1.0) * log(a))
	t_2 = Float64(Float64(x * exp(Float64(log(a) * t))) / y)
	tmp = 0.0
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = Float64(exp(Float64(Float64(-b) - log(a))) * Float64(x / y));
	elseif (t_1 <= 50000.0)
		tmp = Float64(Float64(exp(Float64(log(z) * y)) * x) / y);
	else
		tmp = t_2;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (t - 1.0) * log(a);
	t_2 = (x * exp((log(a) * t))) / y;
	tmp = 0.0;
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = exp((-b - log(a))) * (x / y);
	elseif (t_1 <= 50000.0)
		tmp = (exp((log(z) * y)) * x) / y;
	else
		tmp = t_2;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[t$95$1, -1e+42], t$95$2, If[LessEqual[t$95$1, 130.0], N[(N[Exp[N[((-b) - N[Log[a], $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * N[(x / y), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$1, 50000.0], N[(N[(N[Exp[N[(N[Log[z], $MachinePrecision] * y), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision], t$95$2]]]]]

Derivation

1. Split input into 3 regimes

2. if (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < -1.00000000000000004e42 or 5e4 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a))

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -1.00000000000000004e42 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 130

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{\frac{x \cdot e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y}} \]
   3. Step-by-step derivation

      1. associate-/l* N/A

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

      2. lower-*.f64 N/A

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

      3. lower-/.f64 N/A

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

      4. lower-exp.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      5. lower--.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      6. +-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(y \cdot \log z + -1 \cdot \log a\right) - b}}{y} \]

      7. *-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(\log z \cdot y + -1 \cdot \log a\right) - b}}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. mul-1-neg N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, \mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      11. lower-neg.f64 N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

      12. lift-log.f64 80.2

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

   4. Applied rewrites 80.2%

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

   5. Taylor expanded in y around 0

      \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{\color{blue}{y}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{y} \]

      2. *-commutative N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      3. lower-*.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      4. lower-exp.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      5. add-negate N/A

         \[\leadsto \frac{e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot x}{y} \]

      6. lift-neg.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      7. lower--.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      8. lift-log.f64 59.5

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

   7. Applied rewrites 59.5%

      \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{\color{blue}{y}} \]
   8. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      3. lift-exp.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      4. lift--.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      5. lift-neg.f64 N/A

         \[\leadsto \frac{e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot x}{y} \]

      6. lift-log.f64 N/A

         \[\leadsto \frac{e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot x}{y} \]

      7. associate-/l* N/A

         \[\leadsto e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot \frac{x}{\color{blue}{y}} \]

      8. lower-*.f64 N/A

         \[\leadsto e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot \frac{x}{\color{blue}{y}} \]

      9. lift-neg.f64 N/A

         \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{y} \]

      10. lift-log.f64 N/A

          \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{y} \]

      11. lift--.f64 N/A

          \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{y} \]

      12. lift-exp.f64 N/A

          \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{y} \]

      13. lower-/.f64 54.9

          \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{y} \]

   9. Applied rewrites 54.9%

      \[\leadsto e^{\left(-b\right) - \log a} \cdot \frac{x}{\color{blue}{y}} \]

   if 130 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 5e4

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
   2. Step-by-step derivation

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-exp.f64 N/A

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

      4. lift--.f64 N/A

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

      5. lift-+.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. lift-log.f64 N/A

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

      8. lift-*.f64 N/A

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

      9. lift--.f64 N/A

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

      10. lift-log.f64 N/A

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

      11. mult-flip N/A

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

      12. lower-*.f64 N/A

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

   3. Applied rewrites 98.5%

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

   4. Taylor expanded in y around inf

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

      1. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      2. +-commutative N/A

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

      3. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      4. *-commutative N/A

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

      5. lower-*.f64 N/A

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

      6. +-commutative N/A

         \[\leadsto \left(e^{\left(\frac{\log a \cdot \left(t - 1\right)}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      7. associate-/l* N/A

         \[\leadsto \left(e^{\left(\log a \cdot \frac{t - 1}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. lower-/.f64 N/A

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

      11. lift--.f64 N/A

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

      12. lift-log.f64 97.2

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

   6. Applied rewrites 97.2%

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

   7. Taylor expanded in y around inf

      \[\leadsto \left(e^{\color{blue}{y \cdot \log z}} \cdot x\right) \cdot \frac{1}{y} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      3. lift-log.f64 47.6

         \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y} \]

   9. Applied rewrites 47.6%

      \[\leadsto \left(e^{\color{blue}{\log z \cdot y}} \cdot x\right) \cdot \frac{1}{y} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \color{blue}{\left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y}} \]

       2. lift-/.f64 N/A

          \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \color{blue}{\frac{1}{y}} \]

       3. mult-flip-rev N/A

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

       4. lower-/.f64 47.6

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   11. Applied rewrites 47.6%

       \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 7: 65.9% accurate, 0.6× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \left(t - 1\right) \cdot \log a\\ t_2 := \frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{if}\;t\_1 \leq -1 \cdot 10^{+42}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 130:\\ \;\;\;\;x \cdot \frac{e^{-b}}{y}\\ \mathbf{elif}\;t\_1 \leq 50000:\\ \;\;\;\;\frac{e^{\log z \cdot y} \cdot x}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (* (- t 1.0) (log a))) (t_2 (/ (* x (exp (* (log a) t))) y)))
   (if (<= t_1 -1e+42)
     t_2
     (if (<= t_1 130.0)
       (* x (/ (exp (- b)) y))
       (if (<= t_1 50000.0) (/ (* (exp (* (log z) y)) x) y) t_2)))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (t - 1.0) * log(a);
	double t_2 = (x * exp((log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = x * (exp(-b) / y);
	} else if (t_1 <= 50000.0) {
		tmp = (exp((log(z) * y)) * x) / y;
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = (t - 1.0d0) * log(a)
    t_2 = (x * exp((log(a) * t))) / y
    if (t_1 <= (-1d+42)) then
        tmp = t_2
    else if (t_1 <= 130.0d0) then
        tmp = x * (exp(-b) / y)
    else if (t_1 <= 50000.0d0) then
        tmp = (exp((log(z) * y)) * x) / y
    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 b) {
	double t_1 = (t - 1.0) * Math.log(a);
	double t_2 = (x * Math.exp((Math.log(a) * t))) / y;
	double tmp;
	if (t_1 <= -1e+42) {
		tmp = t_2;
	} else if (t_1 <= 130.0) {
		tmp = x * (Math.exp(-b) / y);
	} else if (t_1 <= 50000.0) {
		tmp = (Math.exp((Math.log(z) * y)) * x) / y;
	} else {
		tmp = t_2;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (t - 1.0) * math.log(a)
	t_2 = (x * math.exp((math.log(a) * t))) / y
	tmp = 0
	if t_1 <= -1e+42:
		tmp = t_2
	elif t_1 <= 130.0:
		tmp = x * (math.exp(-b) / y)
	elif t_1 <= 50000.0:
		tmp = (math.exp((math.log(z) * y)) * x) / y
	else:
		tmp = t_2
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(t - 1.0) * log(a))
	t_2 = Float64(Float64(x * exp(Float64(log(a) * t))) / y)
	tmp = 0.0
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = Float64(x * Float64(exp(Float64(-b)) / y));
	elseif (t_1 <= 50000.0)
		tmp = Float64(Float64(exp(Float64(log(z) * y)) * x) / y);
	else
		tmp = t_2;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (t - 1.0) * log(a);
	t_2 = (x * exp((log(a) * t))) / y;
	tmp = 0.0;
	if (t_1 <= -1e+42)
		tmp = t_2;
	elseif (t_1 <= 130.0)
		tmp = x * (exp(-b) / y);
	elseif (t_1 <= 50000.0)
		tmp = (exp((log(z) * y)) * x) / y;
	else
		tmp = t_2;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(t - 1.0), $MachinePrecision] * N[Log[a], $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[t$95$1, -1e+42], t$95$2, If[LessEqual[t$95$1, 130.0], N[(x * N[(N[Exp[(-b)], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], If[LessEqual[t$95$1, 50000.0], N[(N[(N[Exp[N[(N[Log[z], $MachinePrecision] * y), $MachinePrecision]], $MachinePrecision] * x), $MachinePrecision] / y), $MachinePrecision], t$95$2]]]]]

Derivation

1. Split input into 3 regimes

2. if (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < -1.00000000000000004e42 or 5e4 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a))

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -1.00000000000000004e42 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 130

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in b around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{-1 \cdot b}}}{y} \]
   3. Step-by-step derivation

      1. mul-1-neg N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(b\right)}}{y} \]

      2. lower-neg.f64 48.7

         \[\leadsto \frac{x \cdot e^{-b}}{y} \]

   4. Applied rewrites 48.7%

      \[\leadsto \frac{x \cdot e^{\color{blue}{-b}}}{y} \]
   5. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot e^{-b}}{y}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\color{blue}{x \cdot e^{-b}}}{y} \]

      3. associate-/l* N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      5. lower-/.f64 48.6

         \[\leadsto x \cdot \color{blue}{\frac{e^{-b}}{y}} \]

   6. Applied rewrites 48.6%

      \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

   if 130 < (*.f64 (-.f64 t #s(literal 1 binary64)) (log.f64 a)) < 5e4

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]
   2. Step-by-step derivation

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-exp.f64 N/A

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

      4. lift--.f64 N/A

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

      5. lift-+.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. lift-log.f64 N/A

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

      8. lift-*.f64 N/A

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

      9. lift--.f64 N/A

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

      10. lift-log.f64 N/A

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

      11. mult-flip N/A

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

      12. lower-*.f64 N/A

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

   3. Applied rewrites 98.5%

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

   4. Taylor expanded in y around inf

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

      1. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      2. +-commutative N/A

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

      3. *-commutative N/A

         \[\leadsto \left(e^{y \cdot \left(\log z + \frac{\log a \cdot \left(t - 1\right)}{y}\right) - b} \cdot x\right) \cdot \frac{1}{y} \]

      4. *-commutative N/A

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

      5. lower-*.f64 N/A

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

      6. +-commutative N/A

         \[\leadsto \left(e^{\left(\frac{\log a \cdot \left(t - 1\right)}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      7. associate-/l* N/A

         \[\leadsto \left(e^{\left(\log a \cdot \frac{t - 1}{y} + \log z\right) \cdot y - b} \cdot x\right) \cdot \frac{1}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. lower-/.f64 N/A

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

      11. lift--.f64 N/A

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

      12. lift-log.f64 97.2

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

   6. Applied rewrites 97.2%

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

   7. Taylor expanded in y around inf

      \[\leadsto \left(e^{\color{blue}{y \cdot \log z}} \cdot x\right) \cdot \frac{1}{y} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(e^{\log z \cdot \color{blue}{y}} \cdot x\right) \cdot \frac{1}{y} \]

      3. lift-log.f64 47.6

         \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y} \]

   9. Applied rewrites 47.6%

      \[\leadsto \left(e^{\color{blue}{\log z \cdot y}} \cdot x\right) \cdot \frac{1}{y} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \color{blue}{\left(e^{\log z \cdot y} \cdot x\right) \cdot \frac{1}{y}} \]

       2. lift-/.f64 N/A

          \[\leadsto \left(e^{\log z \cdot y} \cdot x\right) \cdot \color{blue}{\frac{1}{y}} \]

       3. mult-flip-rev N/A

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

       4. lower-/.f64 47.6

          \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]

   11. Applied rewrites 47.6%

       \[\leadsto \color{blue}{\frac{e^{\log z \cdot y} \cdot x}{y}} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 8: 65.8% accurate, 1.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \frac{x \cdot e^{\log a \cdot t}}{y}\\ \mathbf{if}\;t \leq -22:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t \leq 5.2 \cdot 10^{+38}:\\ \;\;\;\;x \cdot \frac{e^{-b}}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (/ (* x (exp (* (log a) t))) y)))
   (if (<= t -22.0) t_1 (if (<= t 5.2e+38) (* x (/ (exp (- b)) y)) t_1))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = (x * exp((log(a) * t))) / y;
	double tmp;
	if (t <= -22.0) {
		tmp = t_1;
	} else if (t <= 5.2e+38) {
		tmp = x * (exp(-b) / y);
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: tmp
    t_1 = (x * exp((log(a) * t))) / y
    if (t <= (-22.0d0)) then
        tmp = t_1
    else if (t <= 5.2d+38) then
        tmp = x * (exp(-b) / y)
    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 b) {
	double t_1 = (x * Math.exp((Math.log(a) * t))) / y;
	double tmp;
	if (t <= -22.0) {
		tmp = t_1;
	} else if (t <= 5.2e+38) {
		tmp = x * (Math.exp(-b) / y);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = (x * math.exp((math.log(a) * t))) / y
	tmp = 0
	if t <= -22.0:
		tmp = t_1
	elif t <= 5.2e+38:
		tmp = x * (math.exp(-b) / y)
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(Float64(x * exp(Float64(log(a) * t))) / y)
	tmp = 0.0
	if (t <= -22.0)
		tmp = t_1;
	elseif (t <= 5.2e+38)
		tmp = Float64(x * Float64(exp(Float64(-b)) / y));
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = (x * exp((log(a) * t))) / y;
	tmp = 0.0;
	if (t <= -22.0)
		tmp = t_1;
	elseif (t <= 5.2e+38)
		tmp = x * (exp(-b) / y);
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(N[(x * N[Exp[N[(N[Log[a], $MachinePrecision] * t), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]}, If[LessEqual[t, -22.0], t$95$1, If[LessEqual[t, 5.2e+38], N[(x * N[(N[Exp[(-b)], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if t < -22 or 5.1999999999999998e38 < t

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{t \cdot \log a}}}{y} \]
   3. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{x \cdot e^{\log a \cdot \color{blue}{t}}}{y} \]

      3. lift-log.f64 48.1

         \[\leadsto \frac{x \cdot e^{\log a \cdot t}}{y} \]

   4. Applied rewrites 48.1%

      \[\leadsto \frac{x \cdot e^{\color{blue}{\log a \cdot t}}}{y} \]

   if -22 < t < 5.1999999999999998e38

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in b around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{-1 \cdot b}}}{y} \]
   3. Step-by-step derivation

      1. mul-1-neg N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(b\right)}}{y} \]

      2. lower-neg.f64 48.7

         \[\leadsto \frac{x \cdot e^{-b}}{y} \]

   4. Applied rewrites 48.7%

      \[\leadsto \frac{x \cdot e^{\color{blue}{-b}}}{y} \]
   5. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot e^{-b}}{y}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\color{blue}{x \cdot e^{-b}}}{y} \]

      3. associate-/l* N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      5. lower-/.f64 48.6

         \[\leadsto x \cdot \color{blue}{\frac{e^{-b}}{y}} \]

   6. Applied rewrites 48.6%

      \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 9: 59.0% accurate, 1.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x \cdot \frac{e^{-b}}{y}\\ \mathbf{if}\;b \leq -410:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;b \leq 4.2 \cdot 10^{-12}:\\ \;\;\;\;e^{-\log a} \cdot \frac{x}{y}\\ \mathbf{else}:\\ \;\;\;\;t\_1\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (* x (/ (exp (- b)) y))))
   (if (<= b -410.0)
     t_1
     (if (<= b 4.2e-12) (* (exp (- (log a))) (/ x y)) t_1))))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = x * (exp(-b) / y);
	double tmp;
	if (b <= -410.0) {
		tmp = t_1;
	} else if (b <= 4.2e-12) {
		tmp = exp(-log(a)) * (x / y);
	} 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, b)
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), intent (in) :: b
    real(8) :: t_1
    real(8) :: tmp
    t_1 = x * (exp(-b) / y)
    if (b <= (-410.0d0)) then
        tmp = t_1
    else if (b <= 4.2d-12) then
        tmp = exp(-log(a)) * (x / y)
    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 b) {
	double t_1 = x * (Math.exp(-b) / y);
	double tmp;
	if (b <= -410.0) {
		tmp = t_1;
	} else if (b <= 4.2e-12) {
		tmp = Math.exp(-Math.log(a)) * (x / y);
	} else {
		tmp = t_1;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	t_1 = x * (math.exp(-b) / y)
	tmp = 0
	if b <= -410.0:
		tmp = t_1
	elif b <= 4.2e-12:
		tmp = math.exp(-math.log(a)) * (x / y)
	else:
		tmp = t_1
	return tmp

Julia

function code(x, y, z, t, a, b)
	t_1 = Float64(x * Float64(exp(Float64(-b)) / y))
	tmp = 0.0
	if (b <= -410.0)
		tmp = t_1;
	elseif (b <= 4.2e-12)
		tmp = Float64(exp(Float64(-log(a))) * Float64(x / y));
	else
		tmp = t_1;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	t_1 = x * (exp(-b) / y);
	tmp = 0.0;
	if (b <= -410.0)
		tmp = t_1;
	elseif (b <= 4.2e-12)
		tmp = exp(-log(a)) * (x / y);
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[(x * N[(N[Exp[(-b)], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[b, -410.0], t$95$1, If[LessEqual[b, 4.2e-12], N[(N[Exp[(-N[Log[a], $MachinePrecision])], $MachinePrecision] * N[(x / y), $MachinePrecision]), $MachinePrecision], t$95$1]]]

Derivation

1. Split input into 2 regimes

2. if b < -410 or 4.19999999999999988e-12 < b

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in b around inf

      \[\leadsto \frac{x \cdot e^{\color{blue}{-1 \cdot b}}}{y} \]
   3. Step-by-step derivation

      1. mul-1-neg N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(b\right)}}{y} \]

      2. lower-neg.f64 48.7

         \[\leadsto \frac{x \cdot e^{-b}}{y} \]

   4. Applied rewrites 48.7%

      \[\leadsto \frac{x \cdot e^{\color{blue}{-b}}}{y} \]
   5. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x \cdot e^{-b}}{y}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\color{blue}{x \cdot e^{-b}}}{y} \]

      3. associate-/l* N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

      5. lower-/.f64 48.6

         \[\leadsto x \cdot \color{blue}{\frac{e^{-b}}{y}} \]

   6. Applied rewrites 48.6%

      \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

   if -410 < b < 4.19999999999999988e-12

   1. Initial program 98.5%

      \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{\frac{x \cdot e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y}} \]
   3. Step-by-step derivation

      1. associate-/l* N/A

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

      2. lower-*.f64 N/A

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

      3. lower-/.f64 N/A

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

      4. lower-exp.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      5. lower--.f64 N/A

         \[\leadsto x \cdot \frac{e^{\left(-1 \cdot \log a + y \cdot \log z\right) - b}}{y} \]

      6. +-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(y \cdot \log z + -1 \cdot \log a\right) - b}}{y} \]

      7. *-commutative N/A

         \[\leadsto x \cdot \frac{e^{\left(\log z \cdot y + -1 \cdot \log a\right) - b}}{y} \]

      8. lower-fma.f64 N/A

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

      9. lift-log.f64 N/A

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

      10. mul-1-neg N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, \mathsf{neg}\left(\log a\right)\right) - b}}{y} \]

      11. lower-neg.f64 N/A

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

      12. lift-log.f64 80.2

          \[\leadsto x \cdot \frac{e^{\mathsf{fma}\left(\log z, y, -\log a\right) - b}}{y} \]

   4. Applied rewrites 80.2%

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

   5. Taylor expanded in y around 0

      \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{\color{blue}{y}} \]
   6. Step-by-step derivation

      1. lower-/.f64 N/A

         \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(\left(b + \log a\right)\right)}}{y} \]

      2. *-commutative N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      3. lower-*.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      4. lower-exp.f64 N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\left(b + \log a\right)\right)} \cdot x}{y} \]

      5. add-negate N/A

         \[\leadsto \frac{e^{\left(\mathsf{neg}\left(b\right)\right) - \log a} \cdot x}{y} \]

      6. lift-neg.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      7. lower--.f64 N/A

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

      8. lift-log.f64 59.5

         \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{y} \]

   7. Applied rewrites 59.5%

      \[\leadsto \frac{e^{\left(-b\right) - \log a} \cdot x}{\color{blue}{y}} \]

   8. Taylor expanded in b around 0

      \[\leadsto \frac{e^{\mathsf{neg}\left(\log a\right)} \cdot x}{y} \]
   9. Step-by-step derivation

      1. neg-log N/A

         \[\leadsto \frac{e^{\log \left(\frac{1}{a}\right)} \cdot x}{y} \]

      2. lower-exp.f64 N/A

         \[\leadsto \frac{e^{\log \left(\frac{1}{a}\right)} \cdot x}{y} \]

      3. neg-log N/A

         \[\leadsto \frac{e^{\mathsf{neg}\left(\log a\right)} \cdot x}{y} \]

      4. lower-neg.f64 N/A

         \[\leadsto \frac{e^{-\log a} \cdot x}{y} \]

      5. lift-log.f64 30.8

         \[\leadsto \frac{e^{-\log a} \cdot x}{y} \]

   10. Applied rewrites 30.8%

       \[\leadsto \frac{e^{-\log a} \cdot x}{y} \]
   11. Step-by-step derivation

       1. lift-/.f64 N/A

          \[\leadsto \frac{e^{-\log a} \cdot x}{y} \]

       2. lift-*.f64 N/A

          \[\leadsto \frac{e^{-\log a} \cdot x}{y} \]

       3. associate-/l* N/A

          \[\leadsto e^{-\log a} \cdot \frac{x}{\color{blue}{y}} \]

       4. lift-/.f64 N/A

          \[\leadsto e^{-\log a} \cdot \frac{x}{y} \]

       5. lower-*.f64 30.5

          \[\leadsto e^{-\log a} \cdot \frac{x}{\color{blue}{y}} \]

   12. Applied rewrites 30.5%

       \[\leadsto e^{-\log a} \cdot \frac{x}{\color{blue}{y}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 10: 48.6% accurate, 2.3× speedup

Math

\[\begin{array}{l} \\ x \cdot \frac{e^{-b}}{y} \end{array} \]

FPCore

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

C

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

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, b)
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), intent (in) :: b
    code = x * (exp(-b) / y)
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return x * (Math.exp(-b) / y);
}

Python

def code(x, y, z, t, a, b):
	return x * (math.exp(-b) / y)

Julia

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

MATLAB

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

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(x * N[(N[Exp[(-b)], $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 98.5%

   \[\frac{x \cdot e^{\left(y \cdot \log z + \left(t - 1\right) \cdot \log a\right) - b}}{y} \]

2. Taylor expanded in b around inf

   \[\leadsto \frac{x \cdot e^{\color{blue}{-1 \cdot b}}}{y} \]
3. Step-by-step derivation

   1. mul-1-neg N/A

      \[\leadsto \frac{x \cdot e^{\mathsf{neg}\left(b\right)}}{y} \]

   2. lower-neg.f64 48.7

      \[\leadsto \frac{x \cdot e^{-b}}{y} \]

4. Applied rewrites 48.7%

   \[\leadsto \frac{x \cdot e^{\color{blue}{-b}}}{y} \]
5. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{x \cdot e^{-b}}{y}} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{\color{blue}{x \cdot e^{-b}}}{y} \]

   3. associate-/l* N/A

      \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

   4. lower-*.f64 N/A

      \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]

   5. lower-/.f64 48.6

      \[\leadsto x \cdot \color{blue}{\frac{e^{-b}}{y}} \]

6. Applied rewrites 48.6%

   \[\leadsto \color{blue}{x \cdot \frac{e^{-b}}{y}} \]
7. Add Preprocessing

Reproduce

herbie shell --seed 2025134 
(FPCore (x y z t a b)
  :name "Numeric.SpecFunctions:incompleteBetaWorker from math-functions-0.1.5.2, A"
  :precision binary64
  (/ (* x (exp (- (+ (* y (log z)) (* (- t 1.0) (log a))) b))) y))