Data.Colour.RGBSpace.HSV:hsv from colour-2.3.3, I

Percentage Accurate: 95.8% → 97.8%

Time: 9.4s

Alternatives: 6

Speedup: 0.4×

Specification

Math

\[\begin{array}{l} \\ x \cdot \left(1 - y \cdot z\right) \end{array} \]

FPCore

(FPCore (x y z) :precision binary64 (* x (- 1.0 (* y z))))

C

double code(double x, double y, double z) {
	return x * (1.0 - (y * z));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = x * (1.0d0 - (y * z))
end function

Java

public static double code(double x, double y, double z) {
	return x * (1.0 - (y * z));
}

Python

def code(x, y, z):
	return x * (1.0 - (y * z))

Julia

function code(x, y, z)
	return Float64(x * Float64(1.0 - Float64(y * z)))
end

MATLAB

function tmp = code(x, y, z)
	tmp = x * (1.0 - (y * z));
end

Wolfram

code[x_, y_, z_] := N[(x * N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Initial Program: 95.8% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ x \cdot \left(1 - y \cdot z\right) \end{array} \]

FPCore

(FPCore (x y z) :precision binary64 (* x (- 1.0 (* y z))))

C

double code(double x, double y, double z) {
	return x * (1.0 - (y * z));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = x * (1.0d0 - (y * z))
end function

Java

public static double code(double x, double y, double z) {
	return x * (1.0 - (y * z));
}

Python

def code(x, y, z):
	return x * (1.0 - (y * z))

Julia

function code(x, y, z)
	return Float64(x * Float64(1.0 - Float64(y * z)))
end

MATLAB

function tmp = code(x, y, z)
	tmp = x * (1.0 - (y * z));
end

Wolfram

code[x_, y_, z_] := N[(x * N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Alternative 1: 97.8% accurate, 0.4× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ x\_s \cdot \begin{array}{l} \mathbf{if}\;x\_m \cdot \left(1 - y \cdot z\right) \leq -\infty:\\ \;\;\;\;\left(x\_m \cdot z\right) \cdot \left(-y\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(x\_m, 1, x\_m \cdot \left(\left(-y\right) \cdot z\right)\right)\\ \end{array} \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z)
 :precision binary64
 (*
  x_s
  (if (<= (* x_m (- 1.0 (* y z))) (- INFINITY))
    (* (* x_m z) (- y))
    (fma x_m 1.0 (* x_m (* (- y) z))))))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	double tmp;
	if ((x_m * (1.0 - (y * z))) <= -((double) INFINITY)) {
		tmp = (x_m * z) * -y;
	} else {
		tmp = fma(x_m, 1.0, (x_m * (-y * z)));
	}
	return x_s * tmp;
}

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	tmp = 0.0
	if (Float64(x_m * Float64(1.0 - Float64(y * z))) <= Float64(-Inf))
		tmp = Float64(Float64(x_m * z) * Float64(-y));
	else
		tmp = fma(x_m, 1.0, Float64(x_m * Float64(Float64(-y) * z)));
	end
	return Float64(x_s * tmp)
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := N[(x$95$s * If[LessEqual[N[(x$95$m * N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], (-Infinity)], N[(N[(x$95$m * z), $MachinePrecision] * (-y)), $MachinePrecision], N[(x$95$m * 1.0 + N[(x$95$m * N[((-y) * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]), $MachinePrecision]

Derivation

1. Split input into 2 regimes

2. if (*.f64 x (-.f64 #s(literal 1 binary64) (*.f64 y z))) < -inf.0

   1. Initial program 80.3%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 0.0%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 0.0

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 0.0%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 99.9

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 99.9%

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

       1. lift-*.f64 N/A

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

       2. lift-*.f64 N/A

          \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

       3. associate-*l* N/A

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

       4. *-commutative N/A

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

       5. lower-*.f64 N/A

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

       6. lower-*.f64 100.0

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

   11. Applied rewrites 100.0%

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

   if -inf.0 < (*.f64 x (-.f64 #s(literal 1 binary64) (*.f64 y z)))

   1. Initial program 98.2%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. lift--.f64 N/A

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

      3. lift-*.f64 N/A

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

      4. fp-cancel-sub-sign-inv N/A

         \[\leadsto x \cdot \color{blue}{\left(1 + \left(\mathsf{neg}\left(y\right)\right) \cdot z\right)} \]

      5. distribute-lft-in N/A

         \[\leadsto \color{blue}{x \cdot 1 + x \cdot \left(\left(\mathsf{neg}\left(y\right)\right) \cdot z\right)} \]

      6. lower-fma.f64 N/A

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

      7. lower-*.f64 N/A

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

      8. lower-*.f64 N/A

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

      9. lower-neg.f64 98.2

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

   4. Applied rewrites 98.2%

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

Alternative 2: 94.4% accurate, 0.3× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ \begin{array}{l} t_0 := 1 - y \cdot z\\ t_1 := \left(\left(-y\right) \cdot x\_m\right) \cdot z\\ x\_s \cdot \begin{array}{l} \mathbf{if}\;t\_0 \leq -10:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;t\_0 \leq 2:\\ \;\;\;\;x\_m\\ \mathbf{elif}\;t\_0 \leq 2 \cdot 10^{+79}:\\ \;\;\;\;t\_1\\ \mathbf{else}:\\ \;\;\;\;\left(x\_m \cdot z\right) \cdot \left(-y\right)\\ \end{array} \end{array} \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z)
 :precision binary64
 (let* ((t_0 (- 1.0 (* y z))) (t_1 (* (* (- y) x_m) z)))
   (*
    x_s
    (if (<= t_0 -10.0)
      t_1
      (if (<= t_0 2.0) x_m (if (<= t_0 2e+79) t_1 (* (* x_m z) (- y))))))))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double t_1 = (-y * x_m) * z;
	double tmp;
	if (t_0 <= -10.0) {
		tmp = t_1;
	} else if (t_0 <= 2.0) {
		tmp = x_m;
	} else if (t_0 <= 2e+79) {
		tmp = t_1;
	} else {
		tmp = (x_m * z) * -y;
	}
	return x_s * tmp;
}

Fortran

x\_m =     private
x\_s =     private
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_s, x_m, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x_s
    real(8), intent (in) :: x_m
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = 1.0d0 - (y * z)
    t_1 = (-y * x_m) * z
    if (t_0 <= (-10.0d0)) then
        tmp = t_1
    else if (t_0 <= 2.0d0) then
        tmp = x_m
    else if (t_0 <= 2d+79) then
        tmp = t_1
    else
        tmp = (x_m * z) * -y
    end if
    code = x_s * tmp
end function

Java

x\_m = Math.abs(x);
x\_s = Math.copySign(1.0, x);
public static double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double t_1 = (-y * x_m) * z;
	double tmp;
	if (t_0 <= -10.0) {
		tmp = t_1;
	} else if (t_0 <= 2.0) {
		tmp = x_m;
	} else if (t_0 <= 2e+79) {
		tmp = t_1;
	} else {
		tmp = (x_m * z) * -y;
	}
	return x_s * tmp;
}

Python

x\_m = math.fabs(x)
x\_s = math.copysign(1.0, x)
def code(x_s, x_m, y, z):
	t_0 = 1.0 - (y * z)
	t_1 = (-y * x_m) * z
	tmp = 0
	if t_0 <= -10.0:
		tmp = t_1
	elif t_0 <= 2.0:
		tmp = x_m
	elif t_0 <= 2e+79:
		tmp = t_1
	else:
		tmp = (x_m * z) * -y
	return x_s * tmp

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	t_0 = Float64(1.0 - Float64(y * z))
	t_1 = Float64(Float64(Float64(-y) * x_m) * z)
	tmp = 0.0
	if (t_0 <= -10.0)
		tmp = t_1;
	elseif (t_0 <= 2.0)
		tmp = x_m;
	elseif (t_0 <= 2e+79)
		tmp = t_1;
	else
		tmp = Float64(Float64(x_m * z) * Float64(-y));
	end
	return Float64(x_s * tmp)
end

MATLAB

x\_m = abs(x);
x\_s = sign(x) * abs(1.0);
function tmp_2 = code(x_s, x_m, y, z)
	t_0 = 1.0 - (y * z);
	t_1 = (-y * x_m) * z;
	tmp = 0.0;
	if (t_0 <= -10.0)
		tmp = t_1;
	elseif (t_0 <= 2.0)
		tmp = x_m;
	elseif (t_0 <= 2e+79)
		tmp = t_1;
	else
		tmp = (x_m * z) * -y;
	end
	tmp_2 = x_s * tmp;
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := Block[{t$95$0 = N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(N[((-y) * x$95$m), $MachinePrecision] * z), $MachinePrecision]}, N[(x$95$s * If[LessEqual[t$95$0, -10.0], t$95$1, If[LessEqual[t$95$0, 2.0], x$95$m, If[LessEqual[t$95$0, 2e+79], t$95$1, N[(N[(x$95$m * z), $MachinePrecision] * (-y)), $MachinePrecision]]]]), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if (-.f64 #s(literal 1 binary64) (*.f64 y z)) < -10 or 2 < (-.f64 #s(literal 1 binary64) (*.f64 y z)) < 1.99999999999999993e79

   1. Initial program 92.5%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 41.3%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 36.4

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 36.4%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 78.4

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 78.4%

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

   if -10 < (-.f64 #s(literal 1 binary64) (*.f64 y z)) < 2

   1. Initial program 100.0%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing

   3. Taylor expanded in y around 0

      \[\leadsto \color{blue}{x} \]
   4. Step-by-step derivation

   5. Applied rewrites 96.5%

      \[\leadsto \color{blue}{x} \]

   if 1.99999999999999993e79 < (-.f64 #s(literal 1 binary64) (*.f64 y z))

   1. Initial program 93.5%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 5.4%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 3.3

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 3.3%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 95.5

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 95.5%

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

       1. lift-*.f64 N/A

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

       2. lift-*.f64 N/A

          \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

       3. associate-*l* N/A

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

       4. *-commutative N/A

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

       5. lower-*.f64 N/A

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

       6. lower-*.f64 92.1

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

   11. Applied rewrites 92.1%

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

Alternative 3: 94.2% accurate, 0.3× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ \begin{array}{l} t_0 := 1 - y \cdot z\\ x\_s \cdot \begin{array}{l} \mathbf{if}\;t\_0 \leq -10 \lor \neg \left(t\_0 \leq 2\right):\\ \;\;\;\;\left(x\_m \cdot z\right) \cdot \left(-y\right)\\ \mathbf{else}:\\ \;\;\;\;x\_m\\ \end{array} \end{array} \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z)
 :precision binary64
 (let* ((t_0 (- 1.0 (* y z))))
   (*
    x_s
    (if (or (<= t_0 -10.0) (not (<= t_0 2.0))) (* (* x_m z) (- y)) x_m))))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double tmp;
	if ((t_0 <= -10.0) || !(t_0 <= 2.0)) {
		tmp = (x_m * z) * -y;
	} else {
		tmp = x_m;
	}
	return x_s * tmp;
}

Fortran

x\_m =     private
x\_s =     private
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_s, x_m, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x_s
    real(8), intent (in) :: x_m
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = 1.0d0 - (y * z)
    if ((t_0 <= (-10.0d0)) .or. (.not. (t_0 <= 2.0d0))) then
        tmp = (x_m * z) * -y
    else
        tmp = x_m
    end if
    code = x_s * tmp
end function

Java

x\_m = Math.abs(x);
x\_s = Math.copySign(1.0, x);
public static double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double tmp;
	if ((t_0 <= -10.0) || !(t_0 <= 2.0)) {
		tmp = (x_m * z) * -y;
	} else {
		tmp = x_m;
	}
	return x_s * tmp;
}

Python

x\_m = math.fabs(x)
x\_s = math.copysign(1.0, x)
def code(x_s, x_m, y, z):
	t_0 = 1.0 - (y * z)
	tmp = 0
	if (t_0 <= -10.0) or not (t_0 <= 2.0):
		tmp = (x_m * z) * -y
	else:
		tmp = x_m
	return x_s * tmp

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	t_0 = Float64(1.0 - Float64(y * z))
	tmp = 0.0
	if ((t_0 <= -10.0) || !(t_0 <= 2.0))
		tmp = Float64(Float64(x_m * z) * Float64(-y));
	else
		tmp = x_m;
	end
	return Float64(x_s * tmp)
end

MATLAB

x\_m = abs(x);
x\_s = sign(x) * abs(1.0);
function tmp_2 = code(x_s, x_m, y, z)
	t_0 = 1.0 - (y * z);
	tmp = 0.0;
	if ((t_0 <= -10.0) || ~((t_0 <= 2.0)))
		tmp = (x_m * z) * -y;
	else
		tmp = x_m;
	end
	tmp_2 = x_s * tmp;
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := Block[{t$95$0 = N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]}, N[(x$95$s * If[Or[LessEqual[t$95$0, -10.0], N[Not[LessEqual[t$95$0, 2.0]], $MachinePrecision]], N[(N[(x$95$m * z), $MachinePrecision] * (-y)), $MachinePrecision], x$95$m]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (-.f64 #s(literal 1 binary64) (*.f64 y z)) < -10 or 2 < (-.f64 #s(literal 1 binary64) (*.f64 y z))

   1. Initial program 92.9%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 28.0%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 24.1

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 24.1%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 84.7

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 84.7%

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

       1. lift-*.f64 N/A

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

       2. lift-*.f64 N/A

          \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

       3. associate-*l* N/A

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

       4. *-commutative N/A

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

       5. lower-*.f64 N/A

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

       6. lower-*.f64 87.1

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

   11. Applied rewrites 87.1%

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

   if -10 < (-.f64 #s(literal 1 binary64) (*.f64 y z)) < 2

   1. Initial program 100.0%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing

   3. Taylor expanded in y around 0

      \[\leadsto \color{blue}{x} \]
   4. Step-by-step derivation

   5. Applied rewrites 96.5%

      \[\leadsto \color{blue}{x} \]
3. Recombined 2 regimes into one program.

4. Final simplification 92.0%

   \[\leadsto \begin{array}{l} \mathbf{if}\;1 - y \cdot z \leq -10 \lor \neg \left(1 - y \cdot z \leq 2\right):\\ \;\;\;\;\left(x \cdot z\right) \cdot \left(-y\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]
5. Add Preprocessing

Alternative 4: 93.9% accurate, 0.3× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ \begin{array}{l} t_0 := 1 - y \cdot z\\ x\_s \cdot \begin{array}{l} \mathbf{if}\;t\_0 \leq -10:\\ \;\;\;\;\left(\left(-y\right) \cdot x\_m\right) \cdot z\\ \mathbf{elif}\;t\_0 \leq 2:\\ \;\;\;\;x\_m\\ \mathbf{else}:\\ \;\;\;\;x\_m \cdot \left(\left(-y\right) \cdot z\right)\\ \end{array} \end{array} \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z)
 :precision binary64
 (let* ((t_0 (- 1.0 (* y z))))
   (*
    x_s
    (if (<= t_0 -10.0)
      (* (* (- y) x_m) z)
      (if (<= t_0 2.0) x_m (* x_m (* (- y) z)))))))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double tmp;
	if (t_0 <= -10.0) {
		tmp = (-y * x_m) * z;
	} else if (t_0 <= 2.0) {
		tmp = x_m;
	} else {
		tmp = x_m * (-y * z);
	}
	return x_s * tmp;
}

Fortran

x\_m =     private
x\_s =     private
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_s, x_m, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x_s
    real(8), intent (in) :: x_m
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = 1.0d0 - (y * z)
    if (t_0 <= (-10.0d0)) then
        tmp = (-y * x_m) * z
    else if (t_0 <= 2.0d0) then
        tmp = x_m
    else
        tmp = x_m * (-y * z)
    end if
    code = x_s * tmp
end function

Java

x\_m = Math.abs(x);
x\_s = Math.copySign(1.0, x);
public static double code(double x_s, double x_m, double y, double z) {
	double t_0 = 1.0 - (y * z);
	double tmp;
	if (t_0 <= -10.0) {
		tmp = (-y * x_m) * z;
	} else if (t_0 <= 2.0) {
		tmp = x_m;
	} else {
		tmp = x_m * (-y * z);
	}
	return x_s * tmp;
}

Python

x\_m = math.fabs(x)
x\_s = math.copysign(1.0, x)
def code(x_s, x_m, y, z):
	t_0 = 1.0 - (y * z)
	tmp = 0
	if t_0 <= -10.0:
		tmp = (-y * x_m) * z
	elif t_0 <= 2.0:
		tmp = x_m
	else:
		tmp = x_m * (-y * z)
	return x_s * tmp

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	t_0 = Float64(1.0 - Float64(y * z))
	tmp = 0.0
	if (t_0 <= -10.0)
		tmp = Float64(Float64(Float64(-y) * x_m) * z);
	elseif (t_0 <= 2.0)
		tmp = x_m;
	else
		tmp = Float64(x_m * Float64(Float64(-y) * z));
	end
	return Float64(x_s * tmp)
end

MATLAB

x\_m = abs(x);
x\_s = sign(x) * abs(1.0);
function tmp_2 = code(x_s, x_m, y, z)
	t_0 = 1.0 - (y * z);
	tmp = 0.0;
	if (t_0 <= -10.0)
		tmp = (-y * x_m) * z;
	elseif (t_0 <= 2.0)
		tmp = x_m;
	else
		tmp = x_m * (-y * z);
	end
	tmp_2 = x_s * tmp;
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := Block[{t$95$0 = N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]}, N[(x$95$s * If[LessEqual[t$95$0, -10.0], N[(N[((-y) * x$95$m), $MachinePrecision] * z), $MachinePrecision], If[LessEqual[t$95$0, 2.0], x$95$m, N[(x$95$m * N[((-y) * z), $MachinePrecision]), $MachinePrecision]]]), $MachinePrecision]]

Derivation

1. Split input into 3 regimes

2. if (-.f64 #s(literal 1 binary64) (*.f64 y z)) < -10

   1. Initial program 90.2%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 27.5%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 24.2

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 24.2%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 87.0

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 87.0%

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

   if -10 < (-.f64 #s(literal 1 binary64) (*.f64 y z)) < 2

   1. Initial program 100.0%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing

   3. Taylor expanded in y around 0

      \[\leadsto \color{blue}{x} \]
   4. Step-by-step derivation

   5. Applied rewrites 96.5%

      \[\leadsto \color{blue}{x} \]

   if 2 < (-.f64 #s(literal 1 binary64) (*.f64 y z))

   1. Initial program 95.2%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing

   3. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. lower-*.f64 N/A

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

      3. mul-1-neg N/A

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

      4. lower-neg.f64 91.0

         \[\leadsto x \cdot \left(\left(-y\right) \cdot z\right) \]

   5. Applied rewrites 91.0%

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

Alternative 5: 97.8% accurate, 0.4× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ \begin{array}{l} t_0 := x\_m \cdot \left(1 - y \cdot z\right)\\ x\_s \cdot \begin{array}{l} \mathbf{if}\;t\_0 \leq -\infty:\\ \;\;\;\;\left(x\_m \cdot z\right) \cdot \left(-y\right)\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z)
 :precision binary64
 (let* ((t_0 (* x_m (- 1.0 (* y z)))))
   (* x_s (if (<= t_0 (- INFINITY)) (* (* x_m z) (- y)) t_0))))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	double t_0 = x_m * (1.0 - (y * z));
	double tmp;
	if (t_0 <= -((double) INFINITY)) {
		tmp = (x_m * z) * -y;
	} else {
		tmp = t_0;
	}
	return x_s * tmp;
}

Java

x\_m = Math.abs(x);
x\_s = Math.copySign(1.0, x);
public static double code(double x_s, double x_m, double y, double z) {
	double t_0 = x_m * (1.0 - (y * z));
	double tmp;
	if (t_0 <= -Double.POSITIVE_INFINITY) {
		tmp = (x_m * z) * -y;
	} else {
		tmp = t_0;
	}
	return x_s * tmp;
}

Python

x\_m = math.fabs(x)
x\_s = math.copysign(1.0, x)
def code(x_s, x_m, y, z):
	t_0 = x_m * (1.0 - (y * z))
	tmp = 0
	if t_0 <= -math.inf:
		tmp = (x_m * z) * -y
	else:
		tmp = t_0
	return x_s * tmp

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	t_0 = Float64(x_m * Float64(1.0 - Float64(y * z)))
	tmp = 0.0
	if (t_0 <= Float64(-Inf))
		tmp = Float64(Float64(x_m * z) * Float64(-y));
	else
		tmp = t_0;
	end
	return Float64(x_s * tmp)
end

MATLAB

x\_m = abs(x);
x\_s = sign(x) * abs(1.0);
function tmp_2 = code(x_s, x_m, y, z)
	t_0 = x_m * (1.0 - (y * z));
	tmp = 0.0;
	if (t_0 <= -Inf)
		tmp = (x_m * z) * -y;
	else
		tmp = t_0;
	end
	tmp_2 = x_s * tmp;
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := Block[{t$95$0 = N[(x$95$m * N[(1.0 - N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, N[(x$95$s * If[LessEqual[t$95$0, (-Infinity)], N[(N[(x$95$m * z), $MachinePrecision] * (-y)), $MachinePrecision], t$95$0]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 x (-.f64 #s(literal 1 binary64) (*.f64 y z))) < -inf.0

   1. Initial program 80.3%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
   3. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lift--.f64 N/A

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

      4. flip3-- N/A

         \[\leadsto \color{blue}{\frac{{1}^{3} - {\left(y \cdot z\right)}^{3}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \cdot x \]

      5. associate-*l/ N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      6. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)}} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\color{blue}{\left({1}^{3} - {\left(y \cdot z\right)}^{3}\right) \cdot x}}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      8. metadata-eval N/A

         \[\leadsto \frac{\left(\color{blue}{1} - {\left(y \cdot z\right)}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      9. lower--.f64 N/A

         \[\leadsto \frac{\color{blue}{\left(1 - {\left(y \cdot z\right)}^{3}\right)} \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      10. lower-pow.f64 N/A

          \[\leadsto \frac{\left(1 - \color{blue}{{\left(y \cdot z\right)}^{3}}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      11. lift-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(y \cdot z\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      12. *-commutative N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\left(1 - {\color{blue}{\left(z \cdot y\right)}}^{3}\right) \cdot x}{1 \cdot 1 + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      14. metadata-eval N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{1} + \left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right)} \]

      15. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(\left(y \cdot z\right) \cdot \left(y \cdot z\right) + 1 \cdot \left(y \cdot z\right)\right) + 1}} \]

      16. distribute-rgt-out N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\left(y \cdot z\right) \cdot \left(y \cdot z + 1\right)} + 1} \]

      17. +-commutative N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\left(y \cdot z\right) \cdot \color{blue}{\left(1 + y \cdot z\right)} + 1} \]

      18. lower-fma.f64 N/A

          \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\color{blue}{\mathsf{fma}\left(y \cdot z, 1 + y \cdot z, 1\right)}} \]

   4. Applied rewrites 0.0%

      \[\leadsto \color{blue}{\frac{\left(1 - {\left(z \cdot y\right)}^{3}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)}} \]
   5. Step-by-step derivation

      1. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{3}}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      2. unpow3 N/A

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

      3. unpow2 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{{\left(z \cdot y\right)}^{2}} \cdot \left(z \cdot y\right)\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\left(1 - {\left(z \cdot y\right)}^{2} \cdot \color{blue}{\left(z \cdot y\right)}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      6. associate-*r* N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

      8. lower-*.f64 0.0

         \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right)} \cdot y\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   6. Applied rewrites 0.0%

      \[\leadsto \frac{\left(1 - \color{blue}{\left({\left(z \cdot y\right)}^{2} \cdot z\right) \cdot y}\right) \cdot x}{\mathsf{fma}\left(z \cdot y, \mathsf{fma}\left(z, y, 1\right), 1\right)} \]

   7. Taylor expanded in y around inf

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

      1. associate-*r* N/A

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

      2. associate-*r* N/A

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

      3. lower-*.f64 N/A

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

      4. mul-1-neg N/A

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

      5. *-commutative N/A

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

      6. distribute-lft-neg-out N/A

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

      7. lower-*.f64 N/A

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

      8. lower-neg.f64 99.9

         \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

   9. Applied rewrites 99.9%

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

       1. lift-*.f64 N/A

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

       2. lift-*.f64 N/A

          \[\leadsto \left(\left(-y\right) \cdot x\right) \cdot z \]

       3. associate-*l* N/A

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

       4. *-commutative N/A

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

       5. lower-*.f64 N/A

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

       6. lower-*.f64 100.0

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

   11. Applied rewrites 100.0%

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

   if -inf.0 < (*.f64 x (-.f64 #s(literal 1 binary64) (*.f64 y z)))

   1. Initial program 98.2%

      \[x \cdot \left(1 - y \cdot z\right) \]
   2. Add Preprocessing
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 50.4% accurate, 14.0× speedup

Math

\[\begin{array}{l} x\_m = \left|x\right| \\ x\_s = \mathsf{copysign}\left(1, x\right) \\ x\_s \cdot x\_m \end{array} \]

FPCore

x\_m = (fabs.f64 x)
x\_s = (copysign.f64 #s(literal 1 binary64) x)
(FPCore (x_s x_m y z) :precision binary64 (* x_s x_m))

C

x\_m = fabs(x);
x\_s = copysign(1.0, x);
double code(double x_s, double x_m, double y, double z) {
	return x_s * x_m;
}

Fortran

x\_m =     private
x\_s =     private
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_s, x_m, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x_s
    real(8), intent (in) :: x_m
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = x_s * x_m
end function

Java

x\_m = Math.abs(x);
x\_s = Math.copySign(1.0, x);
public static double code(double x_s, double x_m, double y, double z) {
	return x_s * x_m;
}

Python

x\_m = math.fabs(x)
x\_s = math.copysign(1.0, x)
def code(x_s, x_m, y, z):
	return x_s * x_m

Julia

x\_m = abs(x)
x\_s = copysign(1.0, x)
function code(x_s, x_m, y, z)
	return Float64(x_s * x_m)
end

MATLAB

x\_m = abs(x);
x\_s = sign(x) * abs(1.0);
function tmp = code(x_s, x_m, y, z)
	tmp = x_s * x_m;
end

Wolfram

x\_m = N[Abs[x], $MachinePrecision]
x\_s = N[With[{TMP1 = Abs[1.0], TMP2 = Sign[x]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision]
code[x$95$s_, x$95$m_, y_, z_] := N[(x$95$s * x$95$m), $MachinePrecision]

Derivation

1. Initial program 96.5%

   \[x \cdot \left(1 - y \cdot z\right) \]
2. Add Preprocessing

3. Taylor expanded in y around 0

   \[\leadsto \color{blue}{x} \]
4. Step-by-step derivation

5. Applied rewrites 51.6%

   \[\leadsto \color{blue}{x} \]
6. Add Preprocessing

Reproduce

herbie shell --seed 2025026 
(FPCore (x y z)
  :name "Data.Colour.RGBSpace.HSV:hsv from colour-2.3.3, I"
  :precision binary64
  (* x (- 1.0 (* y z))))