Data.Array.Repa.Algorithms.ColorRamp:rampColorHotToCold from repa-algorithms-3.4.0.1, C

Percentage Accurate: 99.9% → 100.0%

Time: 5.2s

Alternatives: 8

Speedup: 1.5×

• 21.5% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ 1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y)))

C

double code(double x, double y, double z) {
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / 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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = 1.0d0 + ((4.0d0 * ((x + (y * 0.25d0)) - z)) / y)
end function

Java

public static double code(double x, double y, double z) {
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
}

Python

def code(x, y, z):
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y)

Julia

function code(x, y, z)
	return Float64(1.0 + Float64(Float64(4.0 * Float64(Float64(x + Float64(y * 0.25)) - z)) / y))
end

MATLAB

function tmp = code(x, y, z)
	tmp = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
end

Wolfram

code[x_, y_, z_] := N[(1.0 + N[(N[(4.0 * N[(N[(x + N[(y * 0.25), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]

Initial Program: 99.9% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ 1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y)))

C

double code(double x, double y, double z) {
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / 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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = 1.0d0 + ((4.0d0 * ((x + (y * 0.25d0)) - z)) / y)
end function

Java

public static double code(double x, double y, double z) {
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
}

Python

def code(x, y, z):
	return 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y)

Julia

function code(x, y, z)
	return Float64(1.0 + Float64(Float64(4.0 * Float64(Float64(x + Float64(y * 0.25)) - z)) / y))
end

MATLAB

function tmp = code(x, y, z)
	tmp = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
end

Wolfram

code[x_, y_, z_] := N[(1.0 + N[(N[(4.0 * N[(N[(x + N[(y * 0.25), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]

Alternative 1: 100.0% accurate, 1.5× speedup

Math

\[\begin{array}{l} \\ \mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right) \end{array} \]

FPCore

(FPCore (x y z) :precision binary64 (fma (/ (- x z) y) 4.0 2.0))

C

double code(double x, double y, double z) {
	return fma(((x - z) / y), 4.0, 2.0);
}

Julia

function code(x, y, z)
	return fma(Float64(Float64(x - z) / y), 4.0, 2.0)
end

Wolfram

code[x_, y_, z_] := N[(N[(N[(x - z), $MachinePrecision] / y), $MachinePrecision] * 4.0 + 2.0), $MachinePrecision]

Derivation

1. Initial program 100.0%

   \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
2. Add Preprocessing

3. Taylor expanded in x around 0

   \[\leadsto \color{blue}{1 + \left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

5. Applied rewrites 100.0%

   \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right)} \]
6. Add Preprocessing

Alternative 2: 67.0% accurate, 0.2× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := 1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y}\\ \mathbf{if}\;t\_0 \leq -5 \cdot 10^{+138}:\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{elif}\;t\_0 \leq -10 \lor \neg \left(t\_0 \leq 4\right):\\ \;\;\;\;\frac{x}{y} \cdot 4\\ \mathbf{else}:\\ \;\;\;\;2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y))))
   (if (<= t_0 -5e+138)
     (* (/ z y) -4.0)
     (if (or (<= t_0 -10.0) (not (<= t_0 4.0))) (* (/ x y) 4.0) 2.0))))

C

double code(double x, double y, double z) {
	double t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	double tmp;
	if (t_0 <= -5e+138) {
		tmp = (z / y) * -4.0;
	} else if ((t_0 <= -10.0) || !(t_0 <= 4.0)) {
		tmp = (x / y) * 4.0;
	} else {
		tmp = 2.0;
	}
	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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = 1.0d0 + ((4.0d0 * ((x + (y * 0.25d0)) - z)) / y)
    if (t_0 <= (-5d+138)) then
        tmp = (z / y) * (-4.0d0)
    else if ((t_0 <= (-10.0d0)) .or. (.not. (t_0 <= 4.0d0))) then
        tmp = (x / y) * 4.0d0
    else
        tmp = 2.0d0
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	double tmp;
	if (t_0 <= -5e+138) {
		tmp = (z / y) * -4.0;
	} else if ((t_0 <= -10.0) || !(t_0 <= 4.0)) {
		tmp = (x / y) * 4.0;
	} else {
		tmp = 2.0;
	}
	return tmp;
}

Python

def code(x, y, z):
	t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y)
	tmp = 0
	if t_0 <= -5e+138:
		tmp = (z / y) * -4.0
	elif (t_0 <= -10.0) or not (t_0 <= 4.0):
		tmp = (x / y) * 4.0
	else:
		tmp = 2.0
	return tmp

Julia

function code(x, y, z)
	t_0 = Float64(1.0 + Float64(Float64(4.0 * Float64(Float64(x + Float64(y * 0.25)) - z)) / y))
	tmp = 0.0
	if (t_0 <= -5e+138)
		tmp = Float64(Float64(z / y) * -4.0);
	elseif ((t_0 <= -10.0) || !(t_0 <= 4.0))
		tmp = Float64(Float64(x / y) * 4.0);
	else
		tmp = 2.0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	tmp = 0.0;
	if (t_0 <= -5e+138)
		tmp = (z / y) * -4.0;
	elseif ((t_0 <= -10.0) || ~((t_0 <= 4.0)))
		tmp = (x / y) * 4.0;
	else
		tmp = 2.0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(1.0 + N[(N[(4.0 * N[(N[(x + N[(y * 0.25), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$0, -5e+138], N[(N[(z / y), $MachinePrecision] * -4.0), $MachinePrecision], If[Or[LessEqual[t$95$0, -10.0], N[Not[LessEqual[t$95$0, 4.0]], $MachinePrecision]], N[(N[(x / y), $MachinePrecision] * 4.0), $MachinePrecision], 2.0]]]

Derivation

1. Split input into 3 regimes

2. if (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < -5.00000000000000016e138

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}} \]
   4. Step-by-step derivation

      1. metadata-eval N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4}} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y} \]

      2. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

      3. *-commutative N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      5. div-sub N/A

         \[\leadsto \left(\frac{1}{4} + \color{blue}{\left(\frac{\frac{1}{4} \cdot y}{y} - \frac{z}{y}\right)}\right) \cdot 4 \]

      6. associate-/l* N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4} \cdot \frac{y}{y}} - \frac{z}{y}\right)\right) \cdot 4 \]

      7. *-inverses N/A

         \[\leadsto \left(\frac{1}{4} + \left(\frac{1}{4} \cdot \color{blue}{1} - \frac{z}{y}\right)\right) \cdot 4 \]

      8. metadata-eval N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4}} - \frac{z}{y}\right)\right) \cdot 4 \]

      9. associate-+r- N/A

         \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      10. lower--.f64 N/A

          \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      11. metadata-eval N/A

          \[\leadsto \left(\color{blue}{\frac{1}{2}} - \frac{z}{y}\right) \cdot 4 \]

      12. lower-/.f64 60.7

          \[\leadsto \left(0.5 - \color{blue}{\frac{z}{y}}\right) \cdot 4 \]

   5. Applied rewrites 60.7%

      \[\leadsto \color{blue}{\left(0.5 - \frac{z}{y}\right) \cdot 4} \]

   6. Taylor expanded in y around 0

      \[\leadsto -4 \cdot \color{blue}{\frac{z}{y}} \]
   7. Step-by-step derivation

   8. Applied rewrites 60.8%

      \[\leadsto \frac{z}{y} \cdot \color{blue}{-4} \]

   if -5.00000000000000016e138 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < -10 or 4 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y))

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around inf

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

      1. *-commutative N/A

         \[\leadsto \color{blue}{\frac{x}{y} \cdot 4} \]

      2. lower-*.f64 N/A

         \[\leadsto \color{blue}{\frac{x}{y} \cdot 4} \]

      3. lower-/.f64 59.2

         \[\leadsto \color{blue}{\frac{x}{y}} \cdot 4 \]

   5. Applied rewrites 59.2%

      \[\leadsto \color{blue}{\frac{x}{y} \cdot 4} \]

   if -10 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < 4

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in y around inf

      \[\leadsto \color{blue}{2} \]
   4. Step-by-step derivation

   5. Applied rewrites 97.2%

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

4. Final simplification 72.3%

   \[\leadsto \begin{array}{l} \mathbf{if}\;1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq -5 \cdot 10^{+138}:\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{elif}\;1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq -10 \lor \neg \left(1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq 4\right):\\ \;\;\;\;\frac{x}{y} \cdot 4\\ \mathbf{else}:\\ \;\;\;\;2\\ \end{array} \]
5. Add Preprocessing

Alternative 3: 98.6% accurate, 0.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := 1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y}\\ \mathbf{if}\;t\_0 \leq -5000000000000 \lor \neg \left(t\_0 \leq 50000000000\right):\\ \;\;\;\;\frac{x - z}{y} \cdot 4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y))))
   (if (or (<= t_0 -5000000000000.0) (not (<= t_0 50000000000.0)))
     (* (/ (- x z) y) 4.0)
     (fma (/ x y) 4.0 2.0))))

C

double code(double x, double y, double z) {
	double t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	double tmp;
	if ((t_0 <= -5000000000000.0) || !(t_0 <= 50000000000.0)) {
		tmp = ((x - z) / y) * 4.0;
	} else {
		tmp = fma((x / y), 4.0, 2.0);
	}
	return tmp;
}

Julia

function code(x, y, z)
	t_0 = Float64(1.0 + Float64(Float64(4.0 * Float64(Float64(x + Float64(y * 0.25)) - z)) / y))
	tmp = 0.0
	if ((t_0 <= -5000000000000.0) || !(t_0 <= 50000000000.0))
		tmp = Float64(Float64(Float64(x - z) / y) * 4.0);
	else
		tmp = fma(Float64(x / y), 4.0, 2.0);
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(1.0 + N[(N[(4.0 * N[(N[(x + N[(y * 0.25), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, -5000000000000.0], N[Not[LessEqual[t$95$0, 50000000000.0]], $MachinePrecision]], N[(N[(N[(x - z), $MachinePrecision] / y), $MachinePrecision] * 4.0), $MachinePrecision], N[(N[(x / y), $MachinePrecision] * 4.0 + 2.0), $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < -5e12 or 5e10 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y))

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in y around 0

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

      1. *-commutative N/A

         \[\leadsto \color{blue}{\frac{x - z}{y} \cdot 4} \]

      2. lower-*.f64 N/A

         \[\leadsto \color{blue}{\frac{x - z}{y} \cdot 4} \]

      3. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{x - z}{y}} \cdot 4 \]

      4. lower--.f64 99.7

         \[\leadsto \frac{\color{blue}{x - z}}{y} \cdot 4 \]

   5. Applied rewrites 99.7%

      \[\leadsto \color{blue}{\frac{x - z}{y} \cdot 4} \]

   if -5e12 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < 5e10

   1. Initial program 99.9%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + \left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

   5. Applied rewrites 100.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right)} \]
   6. Step-by-step derivation

   7. Applied rewrites 100.0%

      \[\leadsto \mathsf{fma}\left(\frac{x}{y} - \frac{z}{y}, 4, 2\right) \]

   8. Taylor expanded in z around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{x + \frac{1}{4} \cdot y}{y}} \]

   10. Applied rewrites 98.8%

       \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 99.4%

   \[\leadsto \begin{array}{l} \mathbf{if}\;1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq -5000000000000 \lor \neg \left(1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq 50000000000\right):\\ \;\;\;\;\frac{x - z}{y} \cdot 4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \end{array} \]
5. Add Preprocessing

Alternative 4: 65.4% accurate, 0.3× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := 1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y}\\ \mathbf{if}\;t\_0 \leq -10 \lor \neg \left(t\_0 \leq 50000000000\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;2\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y))))
   (if (or (<= t_0 -10.0) (not (<= t_0 50000000000.0))) (* (/ z y) -4.0) 2.0)))

C

double code(double x, double y, double z) {
	double t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	double tmp;
	if ((t_0 <= -10.0) || !(t_0 <= 50000000000.0)) {
		tmp = (z / y) * -4.0;
	} else {
		tmp = 2.0;
	}
	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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = 1.0d0 + ((4.0d0 * ((x + (y * 0.25d0)) - z)) / y)
    if ((t_0 <= (-10.0d0)) .or. (.not. (t_0 <= 50000000000.0d0))) then
        tmp = (z / y) * (-4.0d0)
    else
        tmp = 2.0d0
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	double tmp;
	if ((t_0 <= -10.0) || !(t_0 <= 50000000000.0)) {
		tmp = (z / y) * -4.0;
	} else {
		tmp = 2.0;
	}
	return tmp;
}

Python

def code(x, y, z):
	t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y)
	tmp = 0
	if (t_0 <= -10.0) or not (t_0 <= 50000000000.0):
		tmp = (z / y) * -4.0
	else:
		tmp = 2.0
	return tmp

Julia

function code(x, y, z)
	t_0 = Float64(1.0 + Float64(Float64(4.0 * Float64(Float64(x + Float64(y * 0.25)) - z)) / y))
	tmp = 0.0
	if ((t_0 <= -10.0) || !(t_0 <= 50000000000.0))
		tmp = Float64(Float64(z / y) * -4.0);
	else
		tmp = 2.0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	t_0 = 1.0 + ((4.0 * ((x + (y * 0.25)) - z)) / y);
	tmp = 0.0;
	if ((t_0 <= -10.0) || ~((t_0 <= 50000000000.0)))
		tmp = (z / y) * -4.0;
	else
		tmp = 2.0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(1.0 + N[(N[(4.0 * N[(N[(x + N[(y * 0.25), $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]}, If[Or[LessEqual[t$95$0, -10.0], N[Not[LessEqual[t$95$0, 50000000000.0]], $MachinePrecision]], N[(N[(z / y), $MachinePrecision] * -4.0), $MachinePrecision], 2.0]]

Derivation

1. Split input into 2 regimes

2. if (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < -10 or 5e10 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y))

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}} \]
   4. Step-by-step derivation

      1. metadata-eval N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4}} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y} \]

      2. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

      3. *-commutative N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      5. div-sub N/A

         \[\leadsto \left(\frac{1}{4} + \color{blue}{\left(\frac{\frac{1}{4} \cdot y}{y} - \frac{z}{y}\right)}\right) \cdot 4 \]

      6. associate-/l* N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4} \cdot \frac{y}{y}} - \frac{z}{y}\right)\right) \cdot 4 \]

      7. *-inverses N/A

         \[\leadsto \left(\frac{1}{4} + \left(\frac{1}{4} \cdot \color{blue}{1} - \frac{z}{y}\right)\right) \cdot 4 \]

      8. metadata-eval N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4}} - \frac{z}{y}\right)\right) \cdot 4 \]

      9. associate-+r- N/A

         \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      10. lower--.f64 N/A

          \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      11. metadata-eval N/A

          \[\leadsto \left(\color{blue}{\frac{1}{2}} - \frac{z}{y}\right) \cdot 4 \]

      12. lower-/.f64 49.4

          \[\leadsto \left(0.5 - \color{blue}{\frac{z}{y}}\right) \cdot 4 \]

   5. Applied rewrites 49.4%

      \[\leadsto \color{blue}{\left(0.5 - \frac{z}{y}\right) \cdot 4} \]

   6. Taylor expanded in y around 0

      \[\leadsto -4 \cdot \color{blue}{\frac{z}{y}} \]
   7. Step-by-step derivation

   8. Applied rewrites 49.0%

      \[\leadsto \frac{z}{y} \cdot \color{blue}{-4} \]

   if -10 < (+.f64 #s(literal 1 binary64) (/.f64 (*.f64 #s(literal 4 binary64) (-.f64 (+.f64 x (*.f64 y #s(literal 1/4 binary64))) z)) y)) < 5e10

   1. Initial program 99.9%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in y around inf

      \[\leadsto \color{blue}{2} \]
   4. Step-by-step derivation

   5. Applied rewrites 95.3%

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

4. Final simplification 64.7%

   \[\leadsto \begin{array}{l} \mathbf{if}\;1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq -10 \lor \neg \left(1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \leq 50000000000\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;2\\ \end{array} \]
5. Add Preprocessing

Alternative 5: 86.8% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;x \leq -2.1 \cdot 10^{+51} \lor \neg \left(x \leq 3.1 \cdot 10^{+43}\right):\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{z}{y}, -4, 2\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (or (<= x -2.1e+51) (not (<= x 3.1e+43)))
   (fma (/ x y) 4.0 2.0)
   (fma (/ z y) -4.0 2.0)))

C

double code(double x, double y, double z) {
	double tmp;
	if ((x <= -2.1e+51) || !(x <= 3.1e+43)) {
		tmp = fma((x / y), 4.0, 2.0);
	} else {
		tmp = fma((z / y), -4.0, 2.0);
	}
	return tmp;
}

Julia

function code(x, y, z)
	tmp = 0.0
	if ((x <= -2.1e+51) || !(x <= 3.1e+43))
		tmp = fma(Float64(x / y), 4.0, 2.0);
	else
		tmp = fma(Float64(z / y), -4.0, 2.0);
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := If[Or[LessEqual[x, -2.1e+51], N[Not[LessEqual[x, 3.1e+43]], $MachinePrecision]], N[(N[(x / y), $MachinePrecision] * 4.0 + 2.0), $MachinePrecision], N[(N[(z / y), $MachinePrecision] * -4.0 + 2.0), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < -2.1000000000000001e51 or 3.1000000000000002e43 < x

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + \left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

   5. Applied rewrites 100.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right)} \]
   6. Step-by-step derivation

   7. Applied rewrites 97.4%

      \[\leadsto \mathsf{fma}\left(\frac{x}{y} - \frac{z}{y}, 4, 2\right) \]

   8. Taylor expanded in z around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{x + \frac{1}{4} \cdot y}{y}} \]

   10. Applied rewrites 87.6%

       \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)} \]

   if -2.1000000000000001e51 < x < 3.1000000000000002e43

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + \left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

   5. Applied rewrites 100.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right)} \]

   6. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}} \]
   7. Step-by-step derivation

      1. metadata-eval N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4}} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y} \]

      2. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

      3. div-sub N/A

         \[\leadsto 4 \cdot \left(\frac{1}{4} + \color{blue}{\left(\frac{\frac{1}{4} \cdot y}{y} - \frac{z}{y}\right)}\right) \]

      4. associate-/l* N/A

         \[\leadsto 4 \cdot \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4} \cdot \frac{y}{y}} - \frac{z}{y}\right)\right) \]

      5. *-inverses N/A

         \[\leadsto 4 \cdot \left(\frac{1}{4} + \left(\frac{1}{4} \cdot \color{blue}{1} - \frac{z}{y}\right)\right) \]

      6. metadata-eval N/A

         \[\leadsto 4 \cdot \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4}} - \frac{z}{y}\right)\right) \]

      7. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4} + 4 \cdot \left(\frac{1}{4} - \frac{z}{y}\right)} \]

      8. metadata-eval N/A

         \[\leadsto \color{blue}{1} + 4 \cdot \left(\frac{1}{4} - \frac{z}{y}\right) \]

      9. distribute-lft-out-- N/A

         \[\leadsto 1 + \color{blue}{\left(4 \cdot \frac{1}{4} - 4 \cdot \frac{z}{y}\right)} \]

      10. metadata-eval N/A

          \[\leadsto 1 + \left(\color{blue}{1} - 4 \cdot \frac{z}{y}\right) \]

      11. metadata-eval N/A

          \[\leadsto 1 + \left(1 - \color{blue}{\left(\mathsf{neg}\left(-4\right)\right)} \cdot \frac{z}{y}\right) \]

      12. associate--l+ N/A

          \[\leadsto \color{blue}{\left(1 + 1\right) - \left(\mathsf{neg}\left(-4\right)\right) \cdot \frac{z}{y}} \]

      13. metadata-eval N/A

          \[\leadsto \color{blue}{2} - \left(\mathsf{neg}\left(-4\right)\right) \cdot \frac{z}{y} \]

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

          \[\leadsto \color{blue}{2 + -4 \cdot \frac{z}{y}} \]

      15. +-commutative N/A

          \[\leadsto \color{blue}{-4 \cdot \frac{z}{y} + 2} \]

      16. *-commutative N/A

          \[\leadsto \color{blue}{\frac{z}{y} \cdot -4} + 2 \]

      17. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{z}{y}, -4, 2\right)} \]

      18. lower-/.f64 91.2

          \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{z}{y}}, -4, 2\right) \]

   8. Applied rewrites 91.2%

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

4. Final simplification 89.6%

   \[\leadsto \begin{array}{l} \mathbf{if}\;x \leq -2.1 \cdot 10^{+51} \lor \neg \left(x \leq 3.1 \cdot 10^{+43}\right):\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{z}{y}, -4, 2\right)\\ \end{array} \]
5. Add Preprocessing

Alternative 6: 81.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;z \leq -4.2 \cdot 10^{+133} \lor \neg \left(z \leq 2.6 \cdot 10^{+141}\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (or (<= z -4.2e+133) (not (<= z 2.6e+141)))
   (* (/ z y) -4.0)
   (fma (/ x y) 4.0 2.0)))

C

double code(double x, double y, double z) {
	double tmp;
	if ((z <= -4.2e+133) || !(z <= 2.6e+141)) {
		tmp = (z / y) * -4.0;
	} else {
		tmp = fma((x / y), 4.0, 2.0);
	}
	return tmp;
}

Julia

function code(x, y, z)
	tmp = 0.0
	if ((z <= -4.2e+133) || !(z <= 2.6e+141))
		tmp = Float64(Float64(z / y) * -4.0);
	else
		tmp = fma(Float64(x / y), 4.0, 2.0);
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := If[Or[LessEqual[z, -4.2e+133], N[Not[LessEqual[z, 2.6e+141]], $MachinePrecision]], N[(N[(z / y), $MachinePrecision] * -4.0), $MachinePrecision], N[(N[(x / y), $MachinePrecision] * 4.0 + 2.0), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < -4.2e133 or 2.5999999999999999e141 < z

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}} \]
   4. Step-by-step derivation

      1. metadata-eval N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4}} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y} \]

      2. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

      3. *-commutative N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      5. div-sub N/A

         \[\leadsto \left(\frac{1}{4} + \color{blue}{\left(\frac{\frac{1}{4} \cdot y}{y} - \frac{z}{y}\right)}\right) \cdot 4 \]

      6. associate-/l* N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4} \cdot \frac{y}{y}} - \frac{z}{y}\right)\right) \cdot 4 \]

      7. *-inverses N/A

         \[\leadsto \left(\frac{1}{4} + \left(\frac{1}{4} \cdot \color{blue}{1} - \frac{z}{y}\right)\right) \cdot 4 \]

      8. metadata-eval N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4}} - \frac{z}{y}\right)\right) \cdot 4 \]

      9. associate-+r- N/A

         \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      10. lower--.f64 N/A

          \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      11. metadata-eval N/A

          \[\leadsto \left(\color{blue}{\frac{1}{2}} - \frac{z}{y}\right) \cdot 4 \]

      12. lower-/.f64 88.8

          \[\leadsto \left(0.5 - \color{blue}{\frac{z}{y}}\right) \cdot 4 \]

   5. Applied rewrites 88.8%

      \[\leadsto \color{blue}{\left(0.5 - \frac{z}{y}\right) \cdot 4} \]

   6. Taylor expanded in y around 0

      \[\leadsto -4 \cdot \color{blue}{\frac{z}{y}} \]
   7. Step-by-step derivation

   8. Applied rewrites 75.9%

      \[\leadsto \frac{z}{y} \cdot \color{blue}{-4} \]

   if -4.2e133 < z < 2.5999999999999999e141

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + \left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

   5. Applied rewrites 100.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x - z}{y}, 4, 2\right)} \]
   6. Step-by-step derivation

   7. Applied rewrites 98.9%

      \[\leadsto \mathsf{fma}\left(\frac{x}{y} - \frac{z}{y}, 4, 2\right) \]

   8. Taylor expanded in z around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{x + \frac{1}{4} \cdot y}{y}} \]

   10. Applied rewrites 85.8%

       \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 83.1%

   \[\leadsto \begin{array}{l} \mathbf{if}\;z \leq -4.2 \cdot 10^{+133} \lor \neg \left(z \leq 2.6 \cdot 10^{+141}\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{x}{y}, 4, 2\right)\\ \end{array} \]
5. Add Preprocessing

Alternative 7: 81.4% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;z \leq -4.2 \cdot 10^{+133} \lor \neg \left(z \leq 2.6 \cdot 10^{+141}\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{4}{y}, x, 2\right)\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (or (<= z -4.2e+133) (not (<= z 2.6e+141)))
   (* (/ z y) -4.0)
   (fma (/ 4.0 y) x 2.0)))

C

double code(double x, double y, double z) {
	double tmp;
	if ((z <= -4.2e+133) || !(z <= 2.6e+141)) {
		tmp = (z / y) * -4.0;
	} else {
		tmp = fma((4.0 / y), x, 2.0);
	}
	return tmp;
}

Julia

function code(x, y, z)
	tmp = 0.0
	if ((z <= -4.2e+133) || !(z <= 2.6e+141))
		tmp = Float64(Float64(z / y) * -4.0);
	else
		tmp = fma(Float64(4.0 / y), x, 2.0);
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := If[Or[LessEqual[z, -4.2e+133], N[Not[LessEqual[z, 2.6e+141]], $MachinePrecision]], N[(N[(z / y), $MachinePrecision] * -4.0), $MachinePrecision], N[(N[(4.0 / y), $MachinePrecision] * x + 2.0), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < -4.2e133 or 2.5999999999999999e141 < z

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y}} \]
   4. Step-by-step derivation

      1. metadata-eval N/A

         \[\leadsto \color{blue}{4 \cdot \frac{1}{4}} + 4 \cdot \frac{\frac{1}{4} \cdot y - z}{y} \]

      2. distribute-lft-out N/A

         \[\leadsto \color{blue}{4 \cdot \left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right)} \]

      3. *-commutative N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      4. lower-*.f64 N/A

         \[\leadsto \color{blue}{\left(\frac{1}{4} + \frac{\frac{1}{4} \cdot y - z}{y}\right) \cdot 4} \]

      5. div-sub N/A

         \[\leadsto \left(\frac{1}{4} + \color{blue}{\left(\frac{\frac{1}{4} \cdot y}{y} - \frac{z}{y}\right)}\right) \cdot 4 \]

      6. associate-/l* N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4} \cdot \frac{y}{y}} - \frac{z}{y}\right)\right) \cdot 4 \]

      7. *-inverses N/A

         \[\leadsto \left(\frac{1}{4} + \left(\frac{1}{4} \cdot \color{blue}{1} - \frac{z}{y}\right)\right) \cdot 4 \]

      8. metadata-eval N/A

         \[\leadsto \left(\frac{1}{4} + \left(\color{blue}{\frac{1}{4}} - \frac{z}{y}\right)\right) \cdot 4 \]

      9. associate-+r- N/A

         \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      10. lower--.f64 N/A

          \[\leadsto \color{blue}{\left(\left(\frac{1}{4} + \frac{1}{4}\right) - \frac{z}{y}\right)} \cdot 4 \]

      11. metadata-eval N/A

          \[\leadsto \left(\color{blue}{\frac{1}{2}} - \frac{z}{y}\right) \cdot 4 \]

      12. lower-/.f64 88.8

          \[\leadsto \left(0.5 - \color{blue}{\frac{z}{y}}\right) \cdot 4 \]

   5. Applied rewrites 88.8%

      \[\leadsto \color{blue}{\left(0.5 - \frac{z}{y}\right) \cdot 4} \]

   6. Taylor expanded in y around 0

      \[\leadsto -4 \cdot \color{blue}{\frac{z}{y}} \]
   7. Step-by-step derivation

   8. Applied rewrites 75.9%

      \[\leadsto \frac{z}{y} \cdot \color{blue}{-4} \]

   if -4.2e133 < z < 2.5999999999999999e141

   1. Initial program 100.0%

      \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
   2. Add Preprocessing

   3. Taylor expanded in z around 0

      \[\leadsto \color{blue}{1 + 4 \cdot \frac{x + \frac{1}{4} \cdot y}{y}} \]
   4. Step-by-step derivation

      1. +-commutative N/A

         \[\leadsto \color{blue}{4 \cdot \frac{x + \frac{1}{4} \cdot y}{y} + 1} \]

      2. div-add N/A

         \[\leadsto 4 \cdot \color{blue}{\left(\frac{x}{y} + \frac{\frac{1}{4} \cdot y}{y}\right)} + 1 \]

      3. distribute-lft-in N/A

         \[\leadsto \color{blue}{\left(4 \cdot \frac{x}{y} + 4 \cdot \frac{\frac{1}{4} \cdot y}{y}\right)} + 1 \]

      4. associate-/l* N/A

         \[\leadsto \left(4 \cdot \frac{x}{y} + 4 \cdot \color{blue}{\left(\frac{1}{4} \cdot \frac{y}{y}\right)}\right) + 1 \]

      5. *-inverses N/A

         \[\leadsto \left(4 \cdot \frac{x}{y} + 4 \cdot \left(\frac{1}{4} \cdot \color{blue}{1}\right)\right) + 1 \]

      6. metadata-eval N/A

         \[\leadsto \left(4 \cdot \frac{x}{y} + 4 \cdot \color{blue}{\frac{1}{4}}\right) + 1 \]

      7. metadata-eval N/A

         \[\leadsto \left(4 \cdot \frac{x}{y} + \color{blue}{1}\right) + 1 \]

      8. associate-+l+ N/A

         \[\leadsto \color{blue}{4 \cdot \frac{x}{y} + \left(1 + 1\right)} \]

      9. associate-*r/ N/A

         \[\leadsto \color{blue}{\frac{4 \cdot x}{y}} + \left(1 + 1\right) \]

      10. associate-*l/ N/A

          \[\leadsto \color{blue}{\frac{4}{y} \cdot x} + \left(1 + 1\right) \]

      11. metadata-eval N/A

          \[\leadsto \frac{\color{blue}{4 \cdot 1}}{y} \cdot x + \left(1 + 1\right) \]

      12. associate-*r/ N/A

          \[\leadsto \color{blue}{\left(4 \cdot \frac{1}{y}\right)} \cdot x + \left(1 + 1\right) \]

      13. metadata-eval N/A

          \[\leadsto \left(4 \cdot \frac{1}{y}\right) \cdot x + \color{blue}{2} \]

      14. lower-fma.f64 N/A

          \[\leadsto \color{blue}{\mathsf{fma}\left(4 \cdot \frac{1}{y}, x, 2\right)} \]

      15. associate-*r/ N/A

          \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{4 \cdot 1}{y}}, x, 2\right) \]

      16. metadata-eval N/A

          \[\leadsto \mathsf{fma}\left(\frac{\color{blue}{4}}{y}, x, 2\right) \]

      17. lower-/.f64 85.7

          \[\leadsto \mathsf{fma}\left(\color{blue}{\frac{4}{y}}, x, 2\right) \]

   5. Applied rewrites 85.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(\frac{4}{y}, x, 2\right)} \]
3. Recombined 2 regimes into one program.

4. Final simplification 83.0%

   \[\leadsto \begin{array}{l} \mathbf{if}\;z \leq -4.2 \cdot 10^{+133} \lor \neg \left(z \leq 2.6 \cdot 10^{+141}\right):\\ \;\;\;\;\frac{z}{y} \cdot -4\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\frac{4}{y}, x, 2\right)\\ \end{array} \]
5. Add Preprocessing

Alternative 8: 34.0% accurate, 31.0× speedup

Math

\[\begin{array}{l} \\ 2 \end{array} \]

FPCore

(FPCore (x y z) :precision binary64 2.0)

C

double code(double x, double y, double z) {
	return 2.0;
}

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 = 2.0d0
end function

Java

public static double code(double x, double y, double z) {
	return 2.0;
}

Python

def code(x, y, z):
	return 2.0

Julia

function code(x, y, z)
	return 2.0
end

MATLAB

function tmp = code(x, y, z)
	tmp = 2.0;
end

Wolfram

code[x_, y_, z_] := 2.0

Derivation

1. Initial program 100.0%

   \[1 + \frac{4 \cdot \left(\left(x + y \cdot 0.25\right) - z\right)}{y} \]
2. Add Preprocessing

3. Taylor expanded in y around inf

   \[\leadsto \color{blue}{2} \]
4. Step-by-step derivation

5. Applied rewrites 34.2%

   \[\leadsto \color{blue}{2} \]
6. Add Preprocessing

Reproduce

herbie shell --seed 2025016 
(FPCore (x y z)
  :name "Data.Array.Repa.Algorithms.ColorRamp:rampColorHotToCold from repa-algorithms-3.4.0.1, C"
  :precision binary64
  (+ 1.0 (/ (* 4.0 (- (+ x (* y 0.25)) z)) y)))