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

Percentage Accurate: 90.4% → 97.7%

Time: 3.6s

Alternatives: 7

Speedup: 1.0×

• 48.6% 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: 90.4% 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: 97.7% accurate, 0.9× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 5.1 \cdot 10^{+148}:\\ \;\;\;\;\mathsf{fma}\left(\mathsf{fma}\left(z\_m, z\_m, -t\right), -4 \cdot y, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\left(y \cdot -4\right) \cdot z\_m, z\_m, x \cdot x\right)\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 5.1e+148)
   (fma (fma z_m z_m (- t)) (* -4.0 y) (* x x))
   (fma (* (* y -4.0) z_m) z_m (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 5.1e+148) {
		tmp = fma(fma(z_m, z_m, -t), (-4.0 * y), (x * x));
	} else {
		tmp = fma(((y * -4.0) * z_m), z_m, (x * x));
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 5.1e+148)
		tmp = fma(fma(z_m, z_m, Float64(-t)), Float64(-4.0 * y), Float64(x * x));
	else
		tmp = fma(Float64(Float64(y * -4.0) * z_m), z_m, 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, 5.1e+148], N[(N[(z$95$m * z$95$m + (-t)), $MachinePrecision] * N[(-4.0 * y), $MachinePrecision] + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y * -4.0), $MachinePrecision] * z$95$m), $MachinePrecision] * z$95$m + N[(x * x), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 5.09999999999999985e148

   1. Initial program 97.7%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 98.1%

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

   if 5.09999999999999985e148 < z

   1. Initial program 71.5%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 71.5%

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

      1. lift-*.f64 N/A

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

      2. lift-fma.f64 N/A

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

      3. lift-neg.f64 N/A

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

      4. lift-fma.f64 N/A

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

      5. lift-*.f64 N/A

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

      6. *-commutative N/A

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

      7. lift-*.f64 N/A

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

      8. lift-fma.f64 N/A

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

      9. lift-neg.f64 N/A

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

      10. lift-*.f64 N/A

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

      11. lift-neg.f64 N/A

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

      12. lift-fma.f64 N/A

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

      13. pow2 N/A

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

      14. distribute-lft-in N/A

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

      15. associate-*r* N/A

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

      16. pow2 N/A

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

      17. associate-+l+ N/A

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

   6. Applied rewrites 80.4%

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

   7. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 95.0

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

   9. Applied rewrites 95.0%

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

Alternative 2: 61.9% accurate, 0.4× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} t_1 := z\_m \cdot z\_m - t\\ t_2 := \left(t \cdot y\right) \cdot 4\\ \mathbf{if}\;t\_1 \leq -4 \cdot 10^{-13}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 50000000:\\ \;\;\;\;x \cdot x\\ \mathbf{elif}\;t\_1 \leq 10^{+169}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 5 \cdot 10^{+203}:\\ \;\;\;\;x \cdot x\\ \mathbf{else}:\\ \;\;\;\;\left(\left(y \cdot z\_m\right) \cdot z\_m\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (let* ((t_1 (- (* z_m z_m) t)) (t_2 (* (* t y) 4.0)))
   (if (<= t_1 -4e-13)
     t_2
     (if (<= t_1 50000000.0)
       (* x x)
       (if (<= t_1 1e+169)
         t_2
         (if (<= t_1 5e+203) (* 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 t_1 = (z_m * z_m) - t;
	double t_2 = (t * y) * 4.0;
	double tmp;
	if (t_1 <= -4e-13) {
		tmp = t_2;
	} else if (t_1 <= 50000000.0) {
		tmp = x * x;
	} else if (t_1 <= 1e+169) {
		tmp = t_2;
	} else if (t_1 <= 5e+203) {
		tmp = x * x;
	} else {
		tmp = ((y * z_m) * z_m) * -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) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_1 = (z_m * z_m) - t
    t_2 = (t * y) * 4.0d0
    if (t_1 <= (-4d-13)) then
        tmp = t_2
    else if (t_1 <= 50000000.0d0) then
        tmp = x * x
    else if (t_1 <= 1d+169) then
        tmp = t_2
    else if (t_1 <= 5d+203) then
        tmp = x * x
    else
        tmp = ((y * z_m) * z_m) * (-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 t_1 = (z_m * z_m) - t;
	double t_2 = (t * y) * 4.0;
	double tmp;
	if (t_1 <= -4e-13) {
		tmp = t_2;
	} else if (t_1 <= 50000000.0) {
		tmp = x * x;
	} else if (t_1 <= 1e+169) {
		tmp = t_2;
	} else if (t_1 <= 5e+203) {
		tmp = x * x;
	} else {
		tmp = ((y * z_m) * z_m) * -4.0;
	}
	return tmp;
}

Python

z_m = math.fabs(z)
def code(x, y, z_m, t):
	t_1 = (z_m * z_m) - t
	t_2 = (t * y) * 4.0
	tmp = 0
	if t_1 <= -4e-13:
		tmp = t_2
	elif t_1 <= 50000000.0:
		tmp = x * x
	elif t_1 <= 1e+169:
		tmp = t_2
	elif t_1 <= 5e+203:
		tmp = 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)
	t_1 = Float64(Float64(z_m * z_m) - t)
	t_2 = Float64(Float64(t * y) * 4.0)
	tmp = 0.0
	if (t_1 <= -4e-13)
		tmp = t_2;
	elseif (t_1 <= 50000000.0)
		tmp = Float64(x * x);
	elseif (t_1 <= 1e+169)
		tmp = t_2;
	elseif (t_1 <= 5e+203)
		tmp = Float64(x * x);
	else
		tmp = Float64(Float64(Float64(y * z_m) * z_m) * -4.0);
	end
	return tmp
end

MATLAB

z_m = abs(z);
function tmp_2 = code(x, y, z_m, t)
	t_1 = (z_m * z_m) - t;
	t_2 = (t * y) * 4.0;
	tmp = 0.0;
	if (t_1 <= -4e-13)
		tmp = t_2;
	elseif (t_1 <= 50000000.0)
		tmp = x * x;
	elseif (t_1 <= 1e+169)
		tmp = t_2;
	elseif (t_1 <= 5e+203)
		tmp = x * x;
	else
		tmp = ((y * z_m) * z_m) * -4.0;
	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[(z$95$m * z$95$m), $MachinePrecision] - t), $MachinePrecision]}, Block[{t$95$2 = N[(N[(t * y), $MachinePrecision] * 4.0), $MachinePrecision]}, If[LessEqual[t$95$1, -4e-13], t$95$2, If[LessEqual[t$95$1, 50000000.0], N[(x * x), $MachinePrecision], If[LessEqual[t$95$1, 1e+169], t$95$2, If[LessEqual[t$95$1, 5e+203], N[(x * x), $MachinePrecision], N[(N[(N[(y * z$95$m), $MachinePrecision] * z$95$m), $MachinePrecision] * -4.0), $MachinePrecision]]]]]]]

Derivation

1. Split input into 3 regimes

2. if (-.f64 (*.f64 z z) t) < -4.0000000000000001e-13 or 5e7 < (-.f64 (*.f64 z z) t) < 9.99999999999999934e168

   1. Initial program 98.8%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in t around inf

      \[\leadsto \color{blue}{4 \cdot \left(t \cdot y\right)} \]
   4. 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 58.7

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

   5. Applied rewrites 58.7%

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

   if -4.0000000000000001e-13 < (-.f64 (*.f64 z z) t) < 5e7 or 9.99999999999999934e168 < (-.f64 (*.f64 z z) t) < 4.99999999999999994e203

   1. Initial program 98.6%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 78.4

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

   5. Applied rewrites 78.4%

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

   if 4.99999999999999994e203 < (-.f64 (*.f64 z z) t)

   1. Initial program 84.6%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot {z}^{2}\right)} \]
   4. 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 73.8

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

   5. Applied rewrites 73.8%

      \[\leadsto \color{blue}{\left(\left(z \cdot z\right) \cdot y\right) \cdot -4} \]
   6. 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 79.1

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

   7. Applied rewrites 79.1%

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

Alternative 3: 87.0% accurate, 0.9× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 4.1 \cdot 10^{+30}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot y, t, x \cdot x\right)\\ \mathbf{elif}\;z\_m \leq 4.2 \cdot 10^{+156}:\\ \;\;\;\;\left(-4 \cdot y\right) \cdot \mathsf{fma}\left(z\_m, z\_m, -t\right)\\ \mathbf{else}:\\ \;\;\;\;\left(\left(y \cdot z\_m\right) \cdot z\_m\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 4.1e+30)
   (fma (* 4.0 y) t (* x x))
   (if (<= z_m 4.2e+156)
     (* (* -4.0 y) (fma z_m z_m (- t)))
     (* (* (* 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 <= 4.1e+30) {
		tmp = fma((4.0 * y), t, (x * x));
	} else if (z_m <= 4.2e+156) {
		tmp = (-4.0 * y) * fma(z_m, z_m, -t);
	} 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 <= 4.1e+30)
		tmp = fma(Float64(4.0 * y), t, Float64(x * x));
	elseif (z_m <= 4.2e+156)
		tmp = Float64(Float64(-4.0 * y) * fma(z_m, z_m, Float64(-t)));
	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, 4.1e+30], N[(N[(4.0 * y), $MachinePrecision] * t + N[(x * x), $MachinePrecision]), $MachinePrecision], If[LessEqual[z$95$m, 4.2e+156], N[(N[(-4.0 * y), $MachinePrecision] * N[(z$95$m * z$95$m + (-t)), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y * z$95$m), $MachinePrecision] * z$95$m), $MachinePrecision] * -4.0), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if z < 4.10000000000000005e30

   1. Initial program 97.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 97.9%

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

   5. Taylor expanded in z around 0

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

      1. pow2 N/A

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

      2. +-commutative N/A

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

      3. *-commutative N/A

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

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

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

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

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

      6. metadata-eval N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. mul-1-neg N/A

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

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

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

      11. pow2 N/A

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

      12. metadata-eval N/A

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

      13. *-lft-identity N/A

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

      14. pow2 N/A

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

      15. *-commutative N/A

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

      16. lower-fma.f64 N/A

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

   7. Applied rewrites 79.9%

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

      1. lift-*.f64 N/A

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

      2. lift-fma.f64 N/A

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

      3. lift-*.f64 N/A

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

      4. associate-*l* N/A

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

      5. *-commutative N/A

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

      6. associate-*r* N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. lower-fma.f64 N/A

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

      10. lower-*.f64 N/A

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

      11. pow2 N/A

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

      12. lift-*.f64 80.4

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

   9. Applied rewrites 80.4%

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

   if 4.10000000000000005e30 < z < 4.19999999999999963e156

   1. Initial program 96.3%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in x around 0

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot \left({z}^{2} - t\right)\right)} \]
   4. 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 75.3

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

   5. Applied rewrites 75.3%

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

   if 4.19999999999999963e156 < z

   1. Initial program 70.1%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot {z}^{2}\right)} \]
   4. 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 75.2

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

   5. Applied rewrites 75.2%

      \[\leadsto \color{blue}{\left(\left(z \cdot z\right) \cdot y\right) \cdot -4} \]
   6. 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 83.3

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

   7. Applied rewrites 83.3%

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

Alternative 4: 91.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 2.85 \cdot 10^{+45}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot y, t, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(\left(y \cdot -4\right) \cdot z\_m, z\_m, x \cdot x\right)\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 2.85e+45)
   (fma (* 4.0 y) t (* x x))
   (fma (* (* y -4.0) z_m) z_m (* x x))))

C

z_m = fabs(z);
double code(double x, double y, double z_m, double t) {
	double tmp;
	if (z_m <= 2.85e+45) {
		tmp = fma((4.0 * y), t, (x * x));
	} else {
		tmp = fma(((y * -4.0) * z_m), z_m, (x * x));
	}
	return tmp;
}

Julia

z_m = abs(z)
function code(x, y, z_m, t)
	tmp = 0.0
	if (z_m <= 2.85e+45)
		tmp = fma(Float64(4.0 * y), t, Float64(x * x));
	else
		tmp = fma(Float64(Float64(y * -4.0) * z_m), z_m, 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, 2.85e+45], N[(N[(4.0 * y), $MachinePrecision] * t + N[(x * x), $MachinePrecision]), $MachinePrecision], N[(N[(N[(y * -4.0), $MachinePrecision] * z$95$m), $MachinePrecision] * z$95$m + N[(x * x), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if z < 2.85000000000000013e45

   1. Initial program 97.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 97.9%

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

   5. Taylor expanded in z around 0

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

      1. pow2 N/A

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

      2. +-commutative N/A

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

      3. *-commutative N/A

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

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

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

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

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

      6. metadata-eval N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. mul-1-neg N/A

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

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

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

      11. pow2 N/A

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

      12. metadata-eval N/A

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

      13. *-lft-identity N/A

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

      14. pow2 N/A

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

      15. *-commutative N/A

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

      16. lower-fma.f64 N/A

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

   7. Applied rewrites 79.6%

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

      1. lift-*.f64 N/A

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

      2. lift-fma.f64 N/A

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

      3. lift-*.f64 N/A

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

      4. associate-*l* N/A

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

      5. *-commutative N/A

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

      6. associate-*r* N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. lower-fma.f64 N/A

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

      10. lower-*.f64 N/A

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

      11. pow2 N/A

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

      12. lift-*.f64 80.1

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

   9. Applied rewrites 80.1%

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

   if 2.85000000000000013e45 < z

   1. Initial program 80.5%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 82.0%

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

      1. lift-*.f64 N/A

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

      2. lift-fma.f64 N/A

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

      3. lift-neg.f64 N/A

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

      4. lift-fma.f64 N/A

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

      5. lift-*.f64 N/A

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

      6. *-commutative N/A

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

      7. lift-*.f64 N/A

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

      8. lift-fma.f64 N/A

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

      9. lift-neg.f64 N/A

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

      10. lift-*.f64 N/A

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

      11. lift-neg.f64 N/A

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

      12. lift-fma.f64 N/A

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

      13. pow2 N/A

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

      14. distribute-lft-in N/A

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

      15. associate-*r* N/A

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

      16. pow2 N/A

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

      17. associate-+l+ N/A

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

   6. Applied rewrites 86.1%

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

   7. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 89.9

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

   9. Applied rewrites 89.9%

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

Alternative 5: 85.4% accurate, 1.2× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;z\_m \leq 6.2 \cdot 10^{+101}:\\ \;\;\;\;\mathsf{fma}\left(4 \cdot y, t, x \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\left(\left(y \cdot z\_m\right) \cdot z\_m\right) \cdot -4\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= z_m 6.2e+101) (fma (* 4.0 y) t (* 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 <= 6.2e+101) {
		tmp = fma((4.0 * y), t, (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 <= 6.2e+101)
		tmp = fma(Float64(4.0 * y), t, 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, 6.2e+101], N[(N[(4.0 * y), $MachinePrecision] * t + 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 < 6.19999999999999998e101

   1. Initial program 97.6%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing
   3. 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

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

   4. Applied rewrites 98.1%

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

   5. Taylor expanded in z around 0

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

      1. pow2 N/A

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

      2. +-commutative N/A

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

      3. *-commutative N/A

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

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

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

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

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

      6. metadata-eval N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. mul-1-neg N/A

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

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

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

      11. pow2 N/A

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

      12. metadata-eval N/A

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

      13. *-lft-identity N/A

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

      14. pow2 N/A

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

      15. *-commutative N/A

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

      16. lower-fma.f64 N/A

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

   7. Applied rewrites 78.2%

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

      1. lift-*.f64 N/A

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

      2. lift-fma.f64 N/A

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

      3. lift-*.f64 N/A

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

      4. associate-*l* N/A

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

      5. *-commutative N/A

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

      6. associate-*r* N/A

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

      7. *-commutative N/A

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

      8. pow2 N/A

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

      9. lower-fma.f64 N/A

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

      10. lower-*.f64 N/A

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

      11. pow2 N/A

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

      12. lift-*.f64 78.7

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

   9. Applied rewrites 78.7%

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

   if 6.19999999999999998e101 < z

   1. Initial program 76.6%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-4 \cdot \left(y \cdot {z}^{2}\right)} \]
   4. 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 73.7

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

   5. Applied rewrites 73.7%

      \[\leadsto \color{blue}{\left(\left(z \cdot z\right) \cdot y\right) \cdot -4} \]
   6. 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 80.0

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

   7. Applied rewrites 80.0%

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

Alternative 6: 57.8% accurate, 1.2× speedup

Math

\[\begin{array}{l} z_m = \left|z\right| \\ \begin{array}{l} \mathbf{if}\;x \cdot x \leq 1.2 \cdot 10^{-76}:\\ \;\;\;\;\left(t \cdot y\right) \cdot 4\\ \mathbf{else}:\\ \;\;\;\;x \cdot x\\ \end{array} \end{array} \]

FPCore

z_m = (fabs.f64 z)
(FPCore (x y z_m t)
 :precision binary64
 (if (<= (* x x) 1.2e-76) (* (* 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) <= 1.2e-76) {
		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) <= 1.2d-76) 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) <= 1.2e-76) {
		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) <= 1.2e-76:
		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) <= 1.2e-76)
		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) <= 1.2e-76)
		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], 1.2e-76], N[(N[(t * y), $MachinePrecision] * 4.0), $MachinePrecision], N[(x * x), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 x x) < 1.20000000000000007e-76

   1. Initial program 95.5%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in t around inf

      \[\leadsto \color{blue}{4 \cdot \left(t \cdot y\right)} \]
   4. 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 54.4

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

   5. Applied rewrites 54.4%

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

   if 1.20000000000000007e-76 < (*.f64 x x)

   1. Initial program 91.9%

      \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
   2. Add Preprocessing

   3. Taylor expanded in x around inf

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

      1. pow2 N/A

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

      2. lift-*.f64 68.1

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

   5. Applied rewrites 68.1%

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

Alternative 7: 40.5% 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 93.5%

   \[x \cdot x - \left(y \cdot 4\right) \cdot \left(z \cdot z - t\right) \]
2. Add Preprocessing

3. Taylor expanded in x around inf

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

   1. pow2 N/A

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

   2. lift-*.f64 41.3

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

5. Applied rewrites 41.3%

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

Developer Target 1: 90.4% 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 2025051 
(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))))