Graphics.Rasterific.Shading:$sradialGradientWithFocusShader from Rasterific-0.6.1, B

Percentage Accurate: 90.9% → 96.8%

Time: 3.2s

Alternatives: 7

Speedup: 0.8×

• 49.2% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \end{array} \]

FPCore

(FPCore (x y z t) :precision binary64 (- (* x x) (* (* y 4.0) (- (* z z) t))))

C

double code(double x, double y, double z, double t) {
	return (x * x) - ((y * 4.0) * ((z * z) - t));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z, t)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = (x * x) - ((y * 4.0d0) * ((z * z) - t))
end function

Java

public static double code(double x, double y, double z, double t) {
	return (x * x) - ((y * 4.0) * ((z * z) - t));
}

Python

def code(x, y, z, t):
	return (x * x) - ((y * 4.0) * ((z * z) - t))

Julia

function code(x, y, z, t)
	return Float64(Float64(x * x) - Float64(Float64(y * 4.0) * Float64(Float64(z * z) - t)))
end

MATLAB

function tmp = code(x, y, z, t)
	tmp = (x * x) - ((y * 4.0) * ((z * z) - t));
end

Wolfram

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

Initial Program: 90.9% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \end{array} \]

FPCore

(FPCore (x y z t) :precision binary64 (- (* x x) (* (* y 4.0) (- (* z z) t))))

C

double code(double x, double y, double z, double t) {
	return (x * x) - ((y * 4.0) * ((z * z) - t));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z, t)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    code = (x * x) - ((y * 4.0d0) * ((z * z) - t))
end function

Java

public static double code(double x, double y, double z, double t) {
	return (x * x) - ((y * 4.0) * ((z * z) - t));
}

Python

def code(x, y, z, t):
	return (x * x) - ((y * 4.0) * ((z * z) - t))

Julia

function code(x, y, z, t)
	return Float64(Float64(x * x) - Float64(Float64(y * 4.0) * Float64(Float64(z * z) - t)))
end

MATLAB

function tmp = code(x, y, z, t)
	tmp = (x * x) - ((y * 4.0) * ((z * z) - t));
end

Wolfram

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

Alternative 1: 96.8% accurate, 0.8× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 4.8 \cdot 10^{+151}:\\ \;\;\;\;\mathsf{fma}\left(z\_m \cdot z\_m - t, -4 \cdot y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(z\_m \cdot \left(z\_m \cdot y\right), -4, x \cdot x\right)\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 4.8e+151)
   (fma (- (* z_m z_m) t) (* -4.0 y) (* x x))
   (fma (* z_m (* z_m y)) -4.0 (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 4.8e+151) {
		tmp = fma(((z_m * z_m) - t), (-4.0 * y), (x * x));
	} else {
		tmp = fma((z_m * (z_m * y)), -4.0, (x * x));
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 4.8e+151)
		tmp = fma(Float64(Float64(z_m * z_m) - t), Float64(-4.0 * y), Float64(x * x));
	else
		tmp = fma(Float64(z_m * Float64(z_m * y)), -4.0, Float64(x * x));
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[z$95$m, 4.8e+151], N[(N[(N[(z$95$m * z$95$m), $MachinePrecision] - t), $MachinePrecision] * N[(-4.0 * y), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(N[(z$95$m * N[(z$95$m * y), $MachinePrecision]), $MachinePrecision] * -4.0 + N[(x * x), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 4.8000000000000002e151

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. lift--.f64 N/A

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

      3. pow2 N/A

         \[\leadsto \color{blue}{{x}^{2}} - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

      4. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right)} \cdot \left(z \cdot z - t\right) \]

      5. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right) \cdot \left(z \cdot z - t\right)} \]

      6. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \left(\color{blue}{z \cdot z} - t\right) \]

      7. lift--.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \color{blue}{\left(z \cdot z - t\right)} \]

      8. *-commutative N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(4 \cdot y\right)} \cdot \left(z \cdot z - t\right) \]

      9. pow2 N/A

         \[\leadsto {x}^{2} - \left(4 \cdot y\right) \cdot \left(\color{blue}{{z}^{2}} - t\right) \]

      10. associate-*r* N/A

          \[\leadsto {x}^{2} - \color{blue}{4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]

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

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

      12. metadata-eval N/A

          \[\leadsto {x}^{2} + \color{blue}{-4} \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      13. +-commutative N/A

          \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) + {x}^{2}} \]

      14. associate-*r* N/A

          \[\leadsto \color{blue}{\left(-4 \cdot y\right) \cdot \left({z}^{2} - t\right)} + {x}^{2} \]

      15. pow2 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \left(\color{blue}{z \cdot z} - t\right) + {x}^{2} \]

      16. *-commutative N/A

          \[\leadsto \color{blue}{\left(z \cdot z - t\right) \cdot \left(-4 \cdot y\right)} + {x}^{2} \]

      17. lower-fma.f64 N/A

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

   3. Applied rewrites 91.9%

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

   if 4.8000000000000002e151 < z

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{{x}^{2} - 4 \cdot \left(y \cdot {z}^{2}\right)} \]
   3. Step-by-step derivation

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

         \[\leadsto {x}^{2} + \color{blue}{\left(\mathsf{neg}\left(4\right)\right) \cdot \left(y \cdot {z}^{2}\right)} \]

      2. metadata-eval N/A

         \[\leadsto {x}^{2} + -4 \cdot \left(\color{blue}{y} \cdot {z}^{2}\right) \]

      3. +-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) + \color{blue}{{x}^{2}} \]

      4. *-commutative N/A

         \[\leadsto \left(y \cdot {z}^{2}\right) \cdot -4 + {\color{blue}{x}}^{2} \]

      5. lower-fma.f64 N/A

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

      6. *-commutative N/A

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

      7. lower-*.f64 N/A

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

      8. pow2 N/A

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

      9. lift-*.f64 N/A

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

      10. pow2 N/A

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

      11. lift-*.f64 67.0

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

   4. Applied rewrites 67.0%

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

      1. lift-*.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. associate-*l* N/A

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

      4. lower-*.f64 N/A

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

      5. lower-*.f64 71.9

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

   6. Applied rewrites 71.9%

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

Alternative 2: 90.7% accurate, 1.0× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 2.2 \cdot 10^{+31}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot t, y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(z\_m \cdot \left(z\_m \cdot y\right), -4, x \cdot x\right)\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 2.2e+31)
   (fma (* 4.0 t) y (* x x))
   (fma (* z_m (* z_m y)) -4.0 (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 2.2e+31) {
		tmp = fma((4.0 * t), y, (x * x));
	} else {
		tmp = fma((z_m * (z_m * y)), -4.0, (x * x));
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 2.2e+31)
		tmp = fma(Float64(4.0 * t), y, Float64(x * x));
	else
		tmp = fma(Float64(z_m * Float64(z_m * y)), -4.0, Float64(x * x));
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[z$95$m, 2.2e+31], N[(N[(4.0 * t), $MachinePrecision] * y + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(N[(z$95$m * N[(z$95$m * y), $MachinePrecision]), $MachinePrecision] * -4.0 + N[(x * x), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 2.2000000000000001e31

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in z around 0

      \[\leadsto \color{blue}{{x}^{2} - -4 \cdot \left(t \cdot y\right)} \]
   3. Step-by-step derivation

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

         \[\leadsto {x}^{2} + \color{blue}{\left(\mathsf{neg}\left(-4\right)\right) \cdot \left(t \cdot y\right)} \]

      2. metadata-eval N/A

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

      3. +-commutative N/A

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

      4. *-commutative N/A

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

      5. lower-fma.f64 N/A

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

      6. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, {x}^{2}\right) \]

      7. pow2 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      8. lift-*.f64 66.5

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

   4. Applied rewrites 66.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(t \cdot y, 4, x \cdot x\right)} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      2. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      3. lift-fma.f64 N/A

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

      4. *-commutative N/A

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

      5. associate-*r* N/A

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

      6. lower-fma.f64 N/A

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

      7. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

      8. lift-*.f64 67.3

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

   6. Applied rewrites 67.3%

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

   if 2.2000000000000001e31 < z

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in t around 0

      \[\leadsto \color{blue}{{x}^{2} - 4 \cdot \left(y \cdot {z}^{2}\right)} \]
   3. Step-by-step derivation

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

         \[\leadsto {x}^{2} + \color{blue}{\left(\mathsf{neg}\left(4\right)\right) \cdot \left(y \cdot {z}^{2}\right)} \]

      2. metadata-eval N/A

         \[\leadsto {x}^{2} + -4 \cdot \left(\color{blue}{y} \cdot {z}^{2}\right) \]

      3. +-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) + \color{blue}{{x}^{2}} \]

      4. *-commutative N/A

         \[\leadsto \left(y \cdot {z}^{2}\right) \cdot -4 + {\color{blue}{x}}^{2} \]

      5. lower-fma.f64 N/A

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

      6. *-commutative N/A

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

      7. lower-*.f64 N/A

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

      8. pow2 N/A

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

      9. lift-*.f64 N/A

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

      10. pow2 N/A

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

      11. lift-*.f64 67.0

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

   4. Applied rewrites 67.0%

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

      1. lift-*.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. associate-*l* N/A

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

      4. lower-*.f64 N/A

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

      5. lower-*.f64 71.9

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

   6. Applied rewrites 71.9%

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

Alternative 3: 86.3% accurate, 1.1× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \leq 0.023:\\ \;\;\;\;\left(-4 \cdot y\right) \cdot \left(z\_m \cdot z\_m - t\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot t, y, x \cdot x\right)\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= x 0.023) (* (* -4.0 y) (- (* z_m z_m) t)) (fma (* 4.0 t) y (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 0.023) {
		tmp = (-4.0 * y) * ((z_m * z_m) - t);
	} else {
		tmp = fma((4.0 * t), y, (x * x));
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (x <= 0.023)
		tmp = Float64(Float64(-4.0 * y) * Float64(Float64(z_m * z_m) - t));
	else
		tmp = fma(Float64(4.0 * t), y, Float64(x * x));
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[x, 0.023], N[(N[(-4.0 * y), $MachinePrecision] * N[(N[(z$95$m * z$95$m), $MachinePrecision] - t), $MachinePrecision]), $MachinePrecision], N[(N[(4.0 * t), $MachinePrecision] * y + N[(x * x), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < 0.023

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in x around 0

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]
   3. Step-by-step derivation

      1. associate-*r* N/A

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

      2. pow2 N/A

         \[\leadsto \left(-4 \cdot y\right) \cdot \left(z \cdot z - t\right) \]

      3. lower-*.f64 N/A

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

      4. lower-*.f64 N/A

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

      5. lift--.f64 N/A

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

      6. lift-*.f64 63.0

         \[\leadsto \left(-4 \cdot y\right) \cdot \left(z \cdot z - t\right) \]

   4. Applied rewrites 63.0%

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

   if 0.023 < x

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in z around 0

      \[\leadsto \color{blue}{{x}^{2} - -4 \cdot \left(t \cdot y\right)} \]
   3. Step-by-step derivation

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

         \[\leadsto {x}^{2} + \color{blue}{\left(\mathsf{neg}\left(-4\right)\right) \cdot \left(t \cdot y\right)} \]

      2. metadata-eval N/A

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

      3. +-commutative N/A

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

      4. *-commutative N/A

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

      5. lower-fma.f64 N/A

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

      6. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, {x}^{2}\right) \]

      7. pow2 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      8. lift-*.f64 66.5

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

   4. Applied rewrites 66.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(t \cdot y, 4, x \cdot x\right)} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      2. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      3. lift-fma.f64 N/A

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

      4. *-commutative N/A

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

      5. associate-*r* N/A

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

      6. lower-fma.f64 N/A

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

      7. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

      8. lift-*.f64 67.3

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

   6. Applied rewrites 67.3%

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

Alternative 4: 73.6% accurate, 1.2× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 2.4 \cdot 10^{+72}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot t, y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\left(\left(y \cdot z\_m\right) \cdot z\_m\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 2.4e+72) (fma (* 4.0 t) y (* x x)) (* (* (* y z_m) z_m) -4.0)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 2.4e+72) {
		tmp = fma((4.0 * t), y, (x * x));
	} else {
		tmp = ((y * z_m) * z_m) * -4.0;
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 2.4e+72)
		tmp = fma(Float64(4.0 * t), y, Float64(x * x));
	else
		tmp = Float64(Float64(Float64(y * z_m) * z_m) * -4.0);
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[z$95$m, 2.4e+72], N[(N[(4.0 * t), $MachinePrecision] * y + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y * z$95$m), $MachinePrecision] * z$95$m), $MachinePrecision] * -4.0), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 2.4000000000000001e72

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in z around 0

      \[\leadsto \color{blue}{{x}^{2} - -4 \cdot \left(t \cdot y\right)} \]
   3. Step-by-step derivation

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

         \[\leadsto {x}^{2} + \color{blue}{\left(\mathsf{neg}\left(-4\right)\right) \cdot \left(t \cdot y\right)} \]

      2. metadata-eval N/A

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

      3. +-commutative N/A

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

      4. *-commutative N/A

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

      5. lower-fma.f64 N/A

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

      6. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, {x}^{2}\right) \]

      7. pow2 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      8. lift-*.f64 66.5

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

   4. Applied rewrites 66.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(t \cdot y, 4, x \cdot x\right)} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      2. lift-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(t \cdot y, 4, x \cdot x\right) \]

      3. lift-fma.f64 N/A

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

      4. *-commutative N/A

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

      5. associate-*r* N/A

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

      6. lower-fma.f64 N/A

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

      7. lower-*.f64 N/A

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

      8. lift-*.f64 67.3

         \[\leadsto \mathsf{fma}\left(4 \cdot t, y, x \cdot x\right) \]

   6. Applied rewrites 67.3%

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

   if 2.4000000000000001e72 < z

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot {z}^{2}\right)} \]
   3. Step-by-step derivation

      1. *-commutative N/A

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

      2. lower-*.f64 N/A

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

      3. *-commutative N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      4. lower-*.f64 N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      5. pow2 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      6. lift-*.f64 37.5

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

   4. Applied rewrites 37.5%

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

      1. lift-*.f64 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      2. lift-*.f64 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      3. pow2 N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      4. *-commutative N/A

         \[\leadsto \left(y \cdot {z}^{2}\right) \cdot -4 \]

      5. pow2 N/A

         \[\leadsto \left(y \cdot \left(z \cdot z\right)\right) \cdot -4 \]

      6. associate-*r* N/A

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

      7. lower-*.f64 N/A

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

      8. lower-*.f64 40.4

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

   6. Applied rewrites 40.4%

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

Alternative 5: 45.6% accurate, 0.7× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} t_1 := \left(\left(y \cdot z\_m\right) \cdot z\_m\right) \cdot -4\\ t_2 := \left(4 \cdot t\right) \cdot y\\ \mathbf{if}\;x \leq 2.1 \cdot 10^{-281}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;x \leq 9.4 \cdot 10^{-243}:\\ \;\;\;\;t\_1\\ \mathbf{elif}\;x \leq 2.15 \cdot 10^{-39}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;x \leq 0.5:\\ \;\;\;\;t\_1\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (let* ((t_1 (* (* (* y z_m) z_m) -4.0)) (t_2 (* (* 4.0 t) y)))
   (if (<= x 2.1e-281)
     t_2
     (if (<= x 9.4e-243)
       t_1
       (if (<= x 2.15e-39) t_2 (if (<= x 0.5) t_1 (* x x)))))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double t_1 = ((y * z_m) * z_m) * -4.0;
	double t_2 = (4.0 * t) * y;
	double tmp;
	if (x <= 2.1e-281) {
		tmp = t_2;
	} else if (x <= 9.4e-243) {
		tmp = t_1;
	} else if (x <= 2.15e-39) {
		tmp = t_2;
	} else if (x <= 0.5) {
		tmp = t_1;
	} else {
		tmp = x * x;
	}
	return tmp;
}

Fortran

z_m =     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, y, z_m, t)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z_m
    real(8), intent (in) :: t
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = ((y * z_m) * z_m) * (-4.0d0)
    t_2 = (4.0d0 * t) * y
    if (x <= 2.1d-281) then
        tmp = t_2
    else if (x <= 9.4d-243) then
        tmp = t_1
    else if (x <= 2.15d-39) then
        tmp = t_2
    else if (x <= 0.5d0) then
        tmp = t_1
    else
        tmp = x * x
    end if
    code = tmp
end function

Java

z_m = Math.abs(z);
public static double code(double x, double y, double z_m, double t) {
	double t_1 = ((y * z_m) * z_m) * -4.0;
	double t_2 = (4.0 * t) * y;
	double tmp;
	if (x <= 2.1e-281) {
		tmp = t_2;
	} else if (x <= 9.4e-243) {
		tmp = t_1;
	} else if (x <= 2.15e-39) {
		tmp = t_2;
	} else if (x <= 0.5) {
		tmp = t_1;
	} else {
		tmp = x * x;
	}
	return tmp;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	t_1 = ((y * z_m) * z_m) * -4.0
	t_2 = (4.0 * t) * y
	tmp = 0
	if x <= 2.1e-281:
		tmp = t_2
	elif x <= 9.4e-243:
		tmp = t_1
	elif x <= 2.15e-39:
		tmp = t_2
	elif x <= 0.5:
		tmp = t_1
	else:
		tmp = x * x
	return tmp

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	t_1 = Float64(Float64(Float64(y * z_m) * z_m) * -4.0)
	t_2 = Float64(Float64(4.0 * t) * y)
	tmp = 0.0
	if (x <= 2.1e-281)
		tmp = t_2;
	elseif (x <= 9.4e-243)
		tmp = t_1;
	elseif (x <= 2.15e-39)
		tmp = t_2;
	elseif (x <= 0.5)
		tmp = t_1;
	else
		tmp = Float64(x * x);
	end
	return tmp
end

MATLAB

z_m = abs(z);
function tmp_2 = code(x, y, z_m, t)
	t_1 = ((y * z_m) * z_m) * -4.0;
	t_2 = (4.0 * t) * y;
	tmp = 0.0;
	if (x <= 2.1e-281)
		tmp = t_2;
	elseif (x <= 9.4e-243)
		tmp = t_1;
	elseif (x <= 2.15e-39)
		tmp = t_2;
	elseif (x <= 0.5)
		tmp = t_1;
	else
		tmp = x * x;
	end
	tmp_2 = tmp;
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := Block[{t$95$1 = N[(N[(N[(y * z$95$m), $MachinePrecision] * z$95$m), $MachinePrecision] * -4.0), $MachinePrecision]}, Block[{t$95$2 = N[(N[(4.0 * t), $MachinePrecision] * y), $MachinePrecision]}, If[LessEqual[x, 2.1e-281], t$95$2, If[LessEqual[x, 9.4e-243], t$95$1, If[LessEqual[x, 2.15e-39], t$95$2, If[LessEqual[x, 0.5], t$95$1, N[(x * x), $MachinePrecision]]]]]]]

Derivation

1. Split input into 3 regimes

2. if x < 2.0999999999999999e-281 or 9.4000000000000007e-243 < x < 2.15e-39

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in t around inf

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

      1. *-commutative N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      3. lower-*.f64 31.7

         \[\leadsto \left(t \cdot y\right) \cdot 4 \]

   4. Applied rewrites 31.7%

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

      1. lift-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot 4 \]

      2. lift-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      3. *-commutative N/A

         \[\leadsto 4 \cdot \color{blue}{\left(t \cdot y\right)} \]

      4. associate-*r* N/A

         \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

      5. lower-*.f64 N/A

         \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

      6. lower-*.f64 31.7

         \[\leadsto \left(4 \cdot t\right) \cdot y \]

   6. Applied rewrites 31.7%

      \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

   if 2.0999999999999999e-281 < x < 9.4000000000000007e-243 or 2.15e-39 < x < 0.5

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot {z}^{2}\right)} \]
   3. Step-by-step derivation

      1. *-commutative N/A

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

      2. lower-*.f64 N/A

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

      3. *-commutative N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      4. lower-*.f64 N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      5. pow2 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      6. lift-*.f64 37.5

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

   4. Applied rewrites 37.5%

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

      1. lift-*.f64 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      2. lift-*.f64 N/A

         \[\leadsto \left(\left(z \cdot z\right) \cdot y\right) \cdot -4 \]

      3. pow2 N/A

         \[\leadsto \left({z}^{2} \cdot y\right) \cdot -4 \]

      4. *-commutative N/A

         \[\leadsto \left(y \cdot {z}^{2}\right) \cdot -4 \]

      5. pow2 N/A

         \[\leadsto \left(y \cdot \left(z \cdot z\right)\right) \cdot -4 \]

      6. associate-*r* N/A

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

      7. lower-*.f64 N/A

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

      8. lower-*.f64 40.4

         \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

   6. Applied rewrites 40.4%

      \[\leadsto \left(\left(y \cdot z\right) \cdot z\right) \cdot -4 \]

   if 0.5 < x

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. lift--.f64 N/A

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

      3. pow2 N/A

         \[\leadsto \color{blue}{{x}^{2}} - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

      4. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right)} \cdot \left(z \cdot z - t\right) \]

      5. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right) \cdot \left(z \cdot z - t\right)} \]

      6. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \left(\color{blue}{z \cdot z} - t\right) \]

      7. lift--.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \color{blue}{\left(z \cdot z - t\right)} \]

      8. *-commutative N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(4 \cdot y\right)} \cdot \left(z \cdot z - t\right) \]

      9. pow2 N/A

         \[\leadsto {x}^{2} - \left(4 \cdot y\right) \cdot \left(\color{blue}{{z}^{2}} - t\right) \]

      10. associate-*r* N/A

          \[\leadsto {x}^{2} - \color{blue}{4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]

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

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

      12. metadata-eval N/A

          \[\leadsto {x}^{2} + \color{blue}{-4} \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      13. +-commutative N/A

          \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) + {x}^{2}} \]

      14. associate-*r* N/A

          \[\leadsto \color{blue}{\left(-4 \cdot y\right) \cdot \left({z}^{2} - t\right)} + {x}^{2} \]

      15. pow2 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \left(\color{blue}{z \cdot z} - t\right) + {x}^{2} \]

      16. *-commutative N/A

          \[\leadsto \color{blue}{\left(z \cdot z - t\right) \cdot \left(-4 \cdot y\right)} + {x}^{2} \]

      17. lower-fma.f64 N/A

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

   3. Applied rewrites 91.9%

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

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]
   5. Step-by-step derivation

      1. +-commutative N/A

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

      2. *-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      3. pow2 N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      4. associate-*r* N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

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

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

      6. metadata-eval N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      7. associate-*r* N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      8. *-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      9. pow2 N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      10. associate-*r* N/A

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

      11. pow2 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \left(z \cdot z - t\right) \]

      12. lower-*.f64 N/A

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

      13. *-commutative N/A

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

      14. lower-*.f64 N/A

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

      15. lift--.f64 N/A

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

      16. lift-*.f64 63.0

          \[\leadsto \left(y \cdot -4\right) \cdot \left(z \cdot z - t\right) \]

   6. Applied rewrites 63.0%

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

   7. Taylor expanded in z around 0

      \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) + \color{blue}{4 \cdot \left(t \cdot y\right)} \]
   8. Step-by-step derivation

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

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

      2. metadata-eval N/A

         \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) - -4 \cdot \left(t \cdot y\right) \]

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

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

      4. lower-*.f64 N/A

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

      5. lower--.f64 N/A

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

      6. *-commutative N/A

         \[\leadsto -4 \cdot \left({z}^{2} \cdot y - t \cdot y\right) \]

      7. pow2 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      8. lift-*.f64 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      9. lift-*.f64 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      10. lower-*.f64 60.8

          \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

   9. Applied rewrites 60.8%

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

   10. Taylor expanded in x around inf

       \[\leadsto \color{blue}{{x}^{2}} \]
   11. Step-by-step derivation

       1. pow2 N/A

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

       2. lower-*.f64 41.2

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

   12. Applied rewrites 41.2%

       \[\leadsto \color{blue}{x \cdot x} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 6: 45.3% accurate, 1.7× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \leq 2100:\\ \;\;\;\;\left(4 \cdot t\right) \cdot y\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= x 2100.0) (* (* 4.0 t) y) (* x x)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 2100.0) {
		tmp = (4.0 * t) * y;
	} else {
		tmp = x * x;
	}
	return tmp;
}

Fortran

z_m =     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, y, z_m, t)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z_m
    real(8), intent (in) :: t
    real(8) :: tmp
    if (x <= 2100.0d0) then
        tmp = (4.0d0 * t) * y
    else
        tmp = x * x
    end if
    code = tmp
end function

Java

z_m = Math.abs(z);
public static double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 2100.0) {
		tmp = (4.0 * t) * y;
	} else {
		tmp = x * x;
	}
	return tmp;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	tmp = 0
	if x <= 2100.0:
		tmp = (4.0 * t) * y
	else:
		tmp = x * x
	return tmp

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (x <= 2100.0)
		tmp = Float64(Float64(4.0 * t) * y);
	else
		tmp = Float64(x * x);
	end
	return tmp
end

MATLAB

z_m = abs(z);
function tmp_2 = code(x, y, z_m, t)
	tmp = 0.0;
	if (x <= 2100.0)
		tmp = (4.0 * t) * y;
	else
		tmp = x * x;
	end
	tmp_2 = tmp;
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[x, 2100.0], N[(N[(4.0 * t), $MachinePrecision] * y), $MachinePrecision], N[(x * x), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < 2100

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   2. Taylor expanded in t around inf

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

      1. *-commutative N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      3. lower-*.f64 31.7

         \[\leadsto \left(t \cdot y\right) \cdot 4 \]

   4. Applied rewrites 31.7%

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

      1. lift-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot 4 \]

      2. lift-*.f64 N/A

         \[\leadsto \left(t \cdot y\right) \cdot \color{blue}{4} \]

      3. *-commutative N/A

         \[\leadsto 4 \cdot \color{blue}{\left(t \cdot y\right)} \]

      4. associate-*r* N/A

         \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

      5. lower-*.f64 N/A

         \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

      6. lower-*.f64 31.7

         \[\leadsto \left(4 \cdot t\right) \cdot y \]

   6. Applied rewrites 31.7%

      \[\leadsto \left(4 \cdot t\right) \cdot \color{blue}{y} \]

   if 2100 < x

   1. Initial program 90.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. lift--.f64 N/A

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

      3. pow2 N/A

         \[\leadsto \color{blue}{{x}^{2}} - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

      4. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right)} \cdot \left(z \cdot z - t\right) \]

      5. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right) \cdot \left(z \cdot z - t\right)} \]

      6. lift-*.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \left(\color{blue}{z \cdot z} - t\right) \]

      7. lift--.f64 N/A

         \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \color{blue}{\left(z \cdot z - t\right)} \]

      8. *-commutative N/A

         \[\leadsto {x}^{2} - \color{blue}{\left(4 \cdot y\right)} \cdot \left(z \cdot z - t\right) \]

      9. pow2 N/A

         \[\leadsto {x}^{2} - \left(4 \cdot y\right) \cdot \left(\color{blue}{{z}^{2}} - t\right) \]

      10. associate-*r* N/A

          \[\leadsto {x}^{2} - \color{blue}{4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]

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

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

      12. metadata-eval N/A

          \[\leadsto {x}^{2} + \color{blue}{-4} \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      13. +-commutative N/A

          \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) + {x}^{2}} \]

      14. associate-*r* N/A

          \[\leadsto \color{blue}{\left(-4 \cdot y\right) \cdot \left({z}^{2} - t\right)} + {x}^{2} \]

      15. pow2 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \left(\color{blue}{z \cdot z} - t\right) + {x}^{2} \]

      16. *-commutative N/A

          \[\leadsto \color{blue}{\left(z \cdot z - t\right) \cdot \left(-4 \cdot y\right)} + {x}^{2} \]

      17. lower-fma.f64 N/A

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

   3. Applied rewrites 91.9%

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

   4. Taylor expanded in x around 0

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]
   5. Step-by-step derivation

      1. +-commutative N/A

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

      2. *-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      3. pow2 N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      4. associate-*r* N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

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

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

      6. metadata-eval N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      7. associate-*r* N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      8. *-commutative N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      9. pow2 N/A

         \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

      10. associate-*r* N/A

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

      11. pow2 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \left(z \cdot z - t\right) \]

      12. lower-*.f64 N/A

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

      13. *-commutative N/A

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

      14. lower-*.f64 N/A

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

      15. lift--.f64 N/A

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

      16. lift-*.f64 63.0

          \[\leadsto \left(y \cdot -4\right) \cdot \left(z \cdot z - t\right) \]

   6. Applied rewrites 63.0%

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

   7. Taylor expanded in z around 0

      \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) + \color{blue}{4 \cdot \left(t \cdot y\right)} \]
   8. Step-by-step derivation

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

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

      2. metadata-eval N/A

         \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) - -4 \cdot \left(t \cdot y\right) \]

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

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

      4. lower-*.f64 N/A

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

      5. lower--.f64 N/A

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

      6. *-commutative N/A

         \[\leadsto -4 \cdot \left({z}^{2} \cdot y - t \cdot y\right) \]

      7. pow2 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      8. lift-*.f64 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      9. lift-*.f64 N/A

         \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

      10. lower-*.f64 60.8

          \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

   9. Applied rewrites 60.8%

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

   10. Taylor expanded in x around inf

       \[\leadsto \color{blue}{{x}^{2}} \]
   11. Step-by-step derivation

       1. pow2 N/A

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

       2. lower-*.f64 41.2

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

   12. Applied rewrites 41.2%

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

Alternative 7: 41.2% accurate, 4.6× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ x \cdot x \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t) :precision binary64 (* x x))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	return x * x;
}

Fortran

z_m =     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, y, z_m, t)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z_m
    real(8), intent (in) :: t
    code = x * x
end function

Java

z_m = Math.abs(z);
public static double code(double x, double y, double z_m, double t) {
	return x * x;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	return x * x

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	return Float64(x * x)
end

MATLAB

z_m = abs(z);
function tmp = code(x, y, z_m, t)
	tmp = x * x;
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := N[(x * x), $MachinePrecision]

Derivation

1. Initial program 90.9%

   \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
2. Step-by-step derivation

   1. lift-*.f64 N/A

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

   2. lift--.f64 N/A

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

   3. pow2 N/A

      \[\leadsto \color{blue}{{x}^{2}} - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]

   4. lift-*.f64 N/A

      \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right)} \cdot \left(z \cdot z - t\right) \]

   5. lift-*.f64 N/A

      \[\leadsto {x}^{2} - \color{blue}{\left(y \cdot 4\right) \cdot \left(z \cdot z - t\right)} \]

   6. lift-*.f64 N/A

      \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \left(\color{blue}{z \cdot z} - t\right) \]

   7. lift--.f64 N/A

      \[\leadsto {x}^{2} - \left(y \cdot 4\right) \cdot \color{blue}{\left(z \cdot z - t\right)} \]

   8. *-commutative N/A

      \[\leadsto {x}^{2} - \color{blue}{\left(4 \cdot y\right)} \cdot \left(z \cdot z - t\right) \]

   9. pow2 N/A

      \[\leadsto {x}^{2} - \left(4 \cdot y\right) \cdot \left(\color{blue}{{z}^{2}} - t\right) \]

   10. associate-*r* N/A

       \[\leadsto {x}^{2} - \color{blue}{4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]

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

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

   12. metadata-eval N/A

       \[\leadsto {x}^{2} + \color{blue}{-4} \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   13. +-commutative N/A

       \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) + {x}^{2}} \]

   14. associate-*r* N/A

       \[\leadsto \color{blue}{\left(-4 \cdot y\right) \cdot \left({z}^{2} - t\right)} + {x}^{2} \]

   15. pow2 N/A

       \[\leadsto \left(-4 \cdot y\right) \cdot \left(\color{blue}{z \cdot z} - t\right) + {x}^{2} \]

   16. *-commutative N/A

       \[\leadsto \color{blue}{\left(z \cdot z - t\right) \cdot \left(-4 \cdot y\right)} + {x}^{2} \]

   17. lower-fma.f64 N/A

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

3. Applied rewrites 91.9%

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

4. Taylor expanded in x around 0

   \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]
5. Step-by-step derivation

   1. +-commutative N/A

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

   2. *-commutative N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   3. pow2 N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   4. associate-*r* N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

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

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

   6. metadata-eval N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   7. associate-*r* N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   8. *-commutative N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   9. pow2 N/A

      \[\leadsto -4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right) \]

   10. associate-*r* N/A

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

   11. pow2 N/A

       \[\leadsto \left(-4 \cdot y\right) \cdot \left(z \cdot z - t\right) \]

   12. lower-*.f64 N/A

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

   13. *-commutative N/A

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

   14. lower-*.f64 N/A

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

   15. lift--.f64 N/A

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

   16. lift-*.f64 63.0

       \[\leadsto \left(y \cdot -4\right) \cdot \left(z \cdot z - t\right) \]

6. Applied rewrites 63.0%

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

7. Taylor expanded in z around 0

   \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) + \color{blue}{4 \cdot \left(t \cdot y\right)} \]
8. Step-by-step derivation

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

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

   2. metadata-eval N/A

      \[\leadsto -4 \cdot \left(y \cdot {z}^{2}\right) - -4 \cdot \left(t \cdot y\right) \]

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

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

   4. lower-*.f64 N/A

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

   5. lower--.f64 N/A

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

   6. *-commutative N/A

      \[\leadsto -4 \cdot \left({z}^{2} \cdot y - t \cdot y\right) \]

   7. pow2 N/A

      \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

   8. lift-*.f64 N/A

      \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

   9. lift-*.f64 N/A

      \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

   10. lower-*.f64 60.8

       \[\leadsto -4 \cdot \left(\left(z \cdot z\right) \cdot y - t \cdot y\right) \]

9. Applied rewrites 60.8%

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

10. Taylor expanded in x around inf

    \[\leadsto \color{blue}{{x}^{2}} \]
11. Step-by-step derivation

    1. pow2 N/A

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

    2. lower-*.f64 41.2

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

12. Applied rewrites 41.2%

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

Reproduce

herbie shell --seed 2025142 
(FPCore (x y z t)
  :name "Graphics.Rasterific.Shading:$sradialGradientWithFocusShader from Rasterific-0.6.1, B"
  :precision binary64
  (- (* x x) (* (* y 4.0) (- (* z z) t))))