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

Percentage Accurate: 90.9% → 96.2%

Time: 2.6s

Alternatives: 7

Speedup: 0.9×

• 49.7% 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: 96.2% accurate, 0.9× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 5.4 \cdot 10^{+150}:\\ \;\;\;\;\mathsf{fma}\left(\mathsf{fma}\left(z\_m, z\_m, -t\right), -4 \cdot y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\left(z\_m \cdot \left(z\_m \cdot y\right)\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 5.4e+150)
   (fma (fma z_m z_m (- t)) (* -4.0 y) (* x x))
   (* (* z_m (* z_m y)) -4.0)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 5.4e+150) {
		tmp = fma(fma(z_m, z_m, -t), (-4.0 * y), (x * x));
	} else {
		tmp = (z_m * (z_m * y)) * -4.0;
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 5.4e+150)
		tmp = fma(fma(z_m, z_m, Float64(-t)), Float64(-4.0 * y), Float64(x * x));
	else
		tmp = Float64(Float64(z_m * Float64(z_m * y)) * -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, 5.4e+150], N[(N[(z$95$m * z$95$m + (-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), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 5.40000000000000015e150

   1. Initial program 97.6%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   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. lift-*.f64 N/A

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

      4. lift-*.f64 N/A

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

      5. lift--.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. pow2 N/A

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

      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 99.1%

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

   if 5.40000000000000015e150 < z

   1. Initial program 71.2%

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

   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 77.4

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

   4. Applied rewrites 77.4%

      \[\leadsto \color{blue}{\left(\left(z \cdot z\right) \cdot y\right) \cdot -4} \]
   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. associate-*l* N/A

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

      4. lower-*.f64 N/A

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

      5. lower-*.f64 87.7

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

   6. Applied rewrites 87.7%

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

Alternative 2: 74.4% accurate, 0.8× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \leq 1.1 \cdot 10^{-37}:\\ \;\;\;\;\left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z\_m, z\_m, -t\right)\\ \mathbf{elif}\;x \leq 3.2 \cdot 10^{+151}:\\ \;\;\;\;\mathsf{fma}\left(z\_m \cdot z\_m, -4 \cdot y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= x 1.1e-37)
   (* (* -4.0 y) (fma z_m z_m (- t)))
   (if (<= x 3.2e+151) (fma (* z_m z_m) (* -4.0 y) (* x x)) (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 1.1e-37) {
		tmp = (-4.0 * y) * fma(z_m, z_m, -t);
	} else if (x <= 3.2e+151) {
		tmp = fma((z_m * z_m), (-4.0 * y), (x * x));
	} else {
		tmp = x * x;
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (x <= 1.1e-37)
		tmp = Float64(Float64(-4.0 * y) * fma(z_m, z_m, Float64(-t)));
	elseif (x <= 3.2e+151)
		tmp = fma(Float64(z_m * z_m), Float64(-4.0 * y), Float64(x * x));
	else
		tmp = Float64(x * x);
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[x, 1.1e-37], N[(N[(-4.0 * y), $MachinePrecision] * N[(z$95$m * z$95$m + (-t)), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 3.2e+151], N[(N[(z$95$m * z$95$m), $MachinePrecision] * N[(-4.0 * y), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(x * x), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if x < 1.10000000000000001e-37

   1. Initial program 92.1%

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

   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. pow2 N/A

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

      6. *-lft-identity N/A

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

      7. metadata-eval N/A

         \[\leadsto \left(-4 \cdot y\right) \cdot \left({z}^{2} - \left(\mathsf{neg}\left(-1\right)\right) \cdot t\right) \]

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

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

      9. pow2 N/A

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

      10. lower-fma.f64 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z, \color{blue}{z}, -1 \cdot t\right) \]

      11. mul-1-neg N/A

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

      12. lower-neg.f64 71.4

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

   4. Applied rewrites 71.4%

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

   if 1.10000000000000001e-37 < x < 3.19999999999999994e151

   1. Initial program 93.5%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   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. lift-*.f64 N/A

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

      4. lift-*.f64 N/A

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

      5. lift--.f64 N/A

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

      6. lift-*.f64 N/A

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

      7. pow2 N/A

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

      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 93.5%

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

   4. Taylor expanded in z around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 73.9

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

   6. Applied rewrites 73.9%

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

   if 3.19999999999999994e151 < x

   1. Initial program 80.9%

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

   2. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 91.2

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

   4. Applied rewrites 91.2%

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

Alternative 3: 74.4% accurate, 0.8× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \leq 1.1 \cdot 10^{-37}:\\ \;\;\;\;\left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z\_m, z\_m, -t\right)\\ \mathbf{elif}\;x \leq 3.2 \cdot 10^{+151}:\\ \;\;\;\;\mathsf{fma}\left(\left(z\_m \cdot z\_m\right) \cdot y, -4, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= x 1.1e-37)
   (* (* -4.0 y) (fma z_m z_m (- t)))
   (if (<= x 3.2e+151) (fma (* (* z_m z_m) y) -4.0 (* x x)) (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 1.1e-37) {
		tmp = (-4.0 * y) * fma(z_m, z_m, -t);
	} else if (x <= 3.2e+151) {
		tmp = fma(((z_m * z_m) * y), -4.0, (x * x));
	} else {
		tmp = x * x;
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (x <= 1.1e-37)
		tmp = Float64(Float64(-4.0 * y) * fma(z_m, z_m, Float64(-t)));
	elseif (x <= 3.2e+151)
		tmp = fma(Float64(Float64(z_m * z_m) * y), -4.0, Float64(x * x));
	else
		tmp = Float64(x * x);
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[x, 1.1e-37], N[(N[(-4.0 * y), $MachinePrecision] * N[(z$95$m * z$95$m + (-t)), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 3.2e+151], N[(N[(N[(z$95$m * z$95$m), $MachinePrecision] * y), $MachinePrecision] * -4.0 + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(x * x), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if x < 1.10000000000000001e-37

   1. Initial program 92.1%

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

   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. pow2 N/A

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

      6. *-lft-identity N/A

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

      7. metadata-eval N/A

         \[\leadsto \left(-4 \cdot y\right) \cdot \left({z}^{2} - \left(\mathsf{neg}\left(-1\right)\right) \cdot t\right) \]

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

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

      9. pow2 N/A

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

      10. lower-fma.f64 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z, \color{blue}{z}, -1 \cdot t\right) \]

      11. mul-1-neg N/A

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

      12. lower-neg.f64 71.4

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

   4. Applied rewrites 71.4%

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

   if 1.10000000000000001e-37 < x < 3.19999999999999994e151

   1. Initial program 93.5%

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

   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 73.9

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

   4. Applied rewrites 73.9%

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

   if 3.19999999999999994e151 < x

   1. Initial program 80.9%

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

   2. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 91.2

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

   4. Applied rewrites 91.2%

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

Alternative 4: 71.4% accurate, 1.1× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \leq 29000000000000:\\ \;\;\;\;\left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z\_m, z\_m, -t\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= x 29000000000000.0) (* (* -4.0 y) (fma z_m z_m (- t))) (* x x)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (x <= 29000000000000.0) {
		tmp = (-4.0 * y) * fma(z_m, z_m, -t);
	} else {
		tmp = x * x;
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (x <= 29000000000000.0)
		tmp = Float64(Float64(-4.0 * y) * fma(z_m, z_m, Float64(-t)));
	else
		tmp = Float64(x * x);
	end
	return tmp
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[x, 29000000000000.0], N[(N[(-4.0 * y), $MachinePrecision] * N[(z$95$m * z$95$m + (-t)), $MachinePrecision]), $MachinePrecision], N[(x * x), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < 2.9e13

   1. Initial program 92.2%

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

   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. pow2 N/A

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

      6. *-lft-identity N/A

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

      7. metadata-eval N/A

         \[\leadsto \left(-4 \cdot y\right) \cdot \left({z}^{2} - \left(\mathsf{neg}\left(-1\right)\right) \cdot t\right) \]

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

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

      9. pow2 N/A

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

      10. lower-fma.f64 N/A

          \[\leadsto \left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z, \color{blue}{z}, -1 \cdot t\right) \]

      11. mul-1-neg N/A

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

      12. lower-neg.f64 71.1

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

   4. Applied rewrites 71.1%

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

   if 2.9e13 < x

   1. Initial program 86.6%

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

   2. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 72.4

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

   4. Applied rewrites 72.4%

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

Alternative 5: 61.4% accurate, 1.2× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 1.6 \cdot 10^{+85}:\\ \;\;\;\;x \cdot x\\ \mathbf{else}:\\ \;\;\;\;\left(z\_m \cdot \left(z\_m \cdot y\right)\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 1.6e+85) (* x x) (* (* z_m (* z_m y)) -4.0)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 1.6e+85) {
		tmp = x * x;
	} else {
		tmp = (z_m * (z_m * y)) * -4.0;
	}
	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 (z_m <= 1.6d+85) then
        tmp = x * x
    else
        tmp = (z_m * (z_m * y)) * (-4.0d0)
    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 (z_m <= 1.6e+85) {
		tmp = x * x;
	} else {
		tmp = (z_m * (z_m * y)) * -4.0;
	}
	return tmp;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	tmp = 0
	if z_m <= 1.6e+85:
		tmp = x * x
	else:
		tmp = (z_m * (z_m * y)) * -4.0
	return tmp

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 1.6e+85)
		tmp = Float64(x * x);
	else
		tmp = Float64(Float64(z_m * Float64(z_m * y)) * -4.0);
	end
	return tmp
end

MATLAB

z_m = abs(z);
function tmp_2 = code(x, y, z_m, t)
	tmp = 0.0;
	if (z_m <= 1.6e+85)
		tmp = x * x;
	else
		tmp = (z_m * (z_m * y)) * -4.0;
	end
	tmp_2 = tmp;
end

Wolfram

z_m = N[Abs[z], $MachinePrecision]
code[x_, y_, z$95$m_, t_] := If[LessEqual[z$95$m, 1.6e+85], N[(x * x), $MachinePrecision], N[(N[(z$95$m * N[(z$95$m * y), $MachinePrecision]), $MachinePrecision] * -4.0), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 1.60000000000000009e85

   1. Initial program 98.1%

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

   2. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 50.1

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

   4. Applied rewrites 50.1%

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

   if 1.60000000000000009e85 < z

   1. Initial program 77.9%

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

   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 74.4

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

   4. Applied rewrites 74.4%

      \[\leadsto \color{blue}{\left(\left(z \cdot z\right) \cdot y\right) \cdot -4} \]
   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. associate-*l* N/A

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

      4. lower-*.f64 N/A

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

      5. lower-*.f64 81.7

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

   6. Applied rewrites 81.7%

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

Alternative 6: 59.4% accurate, 1.2× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \cdot x \leq 1.4 \cdot 10^{-74}:\\ \;\;\;\;\left(t \cdot y\right) \cdot 4\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= (* x x) 1.4e-74) (* (* t y) 4.0) (* x x)))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if ((x * x) <= 1.4e-74) {
		tmp = (t * y) * 4.0;
	} 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 * x) <= 1.4d-74) then
        tmp = (t * y) * 4.0d0
    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 * x) <= 1.4e-74) {
		tmp = (t * y) * 4.0;
	} else {
		tmp = x * x;
	}
	return tmp;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	tmp = 0
	if (x * x) <= 1.4e-74:
		tmp = (t * y) * 4.0
	else:
		tmp = x * x
	return tmp

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (Float64(x * x) <= 1.4e-74)
		tmp = Float64(Float64(t * y) * 4.0);
	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 * x) <= 1.4e-74)
		tmp = (t * y) * 4.0;
	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[N[(x * x), $MachinePrecision], 1.4e-74], N[(N[(t * y), $MachinePrecision] * 4.0), $MachinePrecision], N[(x * x), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 x x) < 1.39999999999999994e-74

   1. Initial program 95.0%

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

   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 50.2

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

   4. Applied rewrites 50.2%

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

   if 1.39999999999999994e-74 < (*.f64 x x)

   1. Initial program 87.7%

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

   2. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 66.5

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

   4. Applied rewrites 66.5%

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

Alternative 7: 41.7% accurate, 4.5× 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. Taylor expanded in x around inf

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

   1. pow2 N/A

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

   2. lift-*.f64 41.7

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

4. Applied rewrites 41.7%

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

Developer Target 1: 90.9% accurate, 1.0× speedup

Math

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

FPCore

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

C

double code(double x, double y, double z, double t) {
	return (x * x) - (4.0 * (y * ((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) - (4.0d0 * (y * ((z * z) - t)))
end function

Java

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

Python

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

Julia

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

MATLAB

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

Wolfram

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

Reproduce

herbie shell --seed 2025095 
(FPCore (x y z t)
  :name "Graphics.Rasterific.Shading:$sradialGradientWithFocusShader from Rasterific-0.6.1, B"
  :precision binary64

  :alt
  (! :herbie-platform default (- (* x x) (* 4 (* y (- (* z z) t)))))

  (- (* x x) (* (* y 4.0) (- (* z z) t))))