Numeric.SpecFunctions:stirlingError from math-functions-0.1.5.2

Percentage Accurate: 99.8% → 99.9%

Time: 3.7s

Alternatives: 12

Speedup: 1.0×

Specification

Math

\[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

FPCore

(FPCore (x y z) :precision binary64 (- (+ (- x (* (+ y 0.5) (log y))) y) z))

C

double code(double x, double y, double z) {
	return ((x - ((y + 0.5) * log(y))) + y) - z;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = ((x - ((y + 0.5d0) * log(y))) + y) - z
end function

Java

public static double code(double x, double y, double z) {
	return ((x - ((y + 0.5) * Math.log(y))) + y) - z;
}

Python

def code(x, y, z):
	return ((x - ((y + 0.5) * math.log(y))) + y) - z

Julia

function code(x, y, z)
	return Float64(Float64(Float64(x - Float64(Float64(y + 0.5) * log(y))) + y) - z)
end

MATLAB

function tmp = code(x, y, z)
	tmp = ((x - ((y + 0.5) * log(y))) + y) - z;
end

Wolfram

code[x_, y_, z_] := N[(N[(N[(x - N[(N[(y + 0.5), $MachinePrecision] * N[Log[y], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + y), $MachinePrecision] - z), $MachinePrecision]

Initial Program: 99.8% accurate, 1.0× speedup

Math

\[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

FPCore

(FPCore (x y z) :precision binary64 (- (+ (- x (* (+ y 0.5) (log y))) y) z))

C

double code(double x, double y, double z) {
	return ((x - ((y + 0.5) * log(y))) + y) - z;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    code = ((x - ((y + 0.5d0) * log(y))) + y) - z
end function

Java

public static double code(double x, double y, double z) {
	return ((x - ((y + 0.5) * Math.log(y))) + y) - z;
}

Python

def code(x, y, z):
	return ((x - ((y + 0.5) * math.log(y))) + y) - z

Julia

function code(x, y, z)
	return Float64(Float64(Float64(x - Float64(Float64(y + 0.5) * log(y))) + y) - z)
end

MATLAB

function tmp = code(x, y, z)
	tmp = ((x - ((y + 0.5) * log(y))) + y) - z;
end

Wolfram

code[x_, y_, z_] := N[(N[(N[(x - N[(N[(y + 0.5), $MachinePrecision] * N[Log[y], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + y), $MachinePrecision] - z), $MachinePrecision]

Alternative 1: 99.9% accurate, 1.0× speedup

Math

\[\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right) \]

FPCore

(FPCore (x y z) :precision binary64 (fma (- -0.5 y) (log y) (- y (- z x))))

C

double code(double x, double y, double z) {
	return fma((-0.5 - y), log(y), (y - (z - x)));
}

Julia

function code(x, y, z)
	return fma(Float64(-0.5 - y), log(y), Float64(y - Float64(z - x)))
end

Wolfram

code[x_, y_, z_] := N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(y - N[(z - x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 99.8%

   \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
2. Step-by-step derivation

   1. lift--.f64 N/A

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

   2. lift-+.f64 N/A

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

   3. associate--l+ N/A

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

   4. lift--.f64 N/A

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

   5. lift-*.f64 N/A

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

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

      \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

   7. associate-+l+ N/A

      \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

   8. +-commutative N/A

      \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

   9. associate-+l+ N/A

      \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

   10. lower-fma.f64 N/A

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

   11. lift-+.f64 N/A

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

   12. add-flip N/A

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

   13. sub-negate N/A

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

   14. lower--.f64 N/A

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

   15. metadata-eval N/A

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

   16. associate-+l- N/A

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

   17. lower--.f64 N/A

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

   18. lower--.f64 99.9%

       \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

3. Applied rewrites 99.9%

   \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]
4. Add Preprocessing

Alternative 2: 99.8% accurate, 1.0× speedup

Math

\[\mathsf{fma}\left(-0.5 - y, \log y, x\right) - \left(z - y\right) \]

FPCore

(FPCore (x y z) :precision binary64 (- (fma (- -0.5 y) (log y) x) (- z y)))

C

double code(double x, double y, double z) {
	return fma((-0.5 - y), log(y), x) - (z - y);
}

Julia

function code(x, y, z)
	return Float64(fma(Float64(-0.5 - y), log(y), x) - Float64(z - y))
end

Wolfram

code[x_, y_, z_] := N[(N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + x), $MachinePrecision] - N[(z - y), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 99.8%

   \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
2. Step-by-step derivation

   1. lift--.f64 N/A

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

   2. lift-+.f64 N/A

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

   3. associate--l+ N/A

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

   4. sub-negate-rev N/A

      \[\leadsto \left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + \color{blue}{\left(\mathsf{neg}\left(\left(z - y\right)\right)\right)} \]

   5. sub-flip-reverse N/A

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

   6. lower--.f64 N/A

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

   7. lift--.f64 N/A

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

   8. lift-*.f64 N/A

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

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

      \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} - \left(z - y\right) \]

   10. +-commutative N/A

       \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + x\right)} - \left(z - y\right) \]

   11. lower-fma.f64 N/A

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

   12. lift-+.f64 N/A

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

   13. add-flip N/A

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

   14. sub-negate N/A

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

   15. lower--.f64 N/A

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

   16. metadata-eval N/A

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

   17. lower--.f64 99.8%

       \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x\right) - \color{blue}{\left(z - y\right)} \]

3. Applied rewrites 99.8%

   \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, x\right) - \left(z - y\right)} \]
4. Add Preprocessing

Alternative 3: 92.0% accurate, 0.8× speedup

Math

\[\begin{array}{l} \mathbf{if}\;x \leq -3.3 \cdot 10^{+41}:\\ \;\;\;\;\mathsf{fma}\left(-0.5 - y, \log y, y + x\right)\\ \mathbf{elif}\;x \leq 2.5 \cdot 10^{+39}:\\ \;\;\;\;\mathsf{fma}\left(-0.5 - y, \log y, y - z\right)\\ \mathbf{else}:\\ \;\;\;\;\mathsf{fma}\left(-0.5 - y, \log y, x - z\right)\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (<= x -3.3e+41)
   (fma (- -0.5 y) (log y) (+ y x))
   (if (<= x 2.5e+39)
     (fma (- -0.5 y) (log y) (- y z))
     (fma (- -0.5 y) (log y) (- x z)))))

C

double code(double x, double y, double z) {
	double tmp;
	if (x <= -3.3e+41) {
		tmp = fma((-0.5 - y), log(y), (y + x));
	} else if (x <= 2.5e+39) {
		tmp = fma((-0.5 - y), log(y), (y - z));
	} else {
		tmp = fma((-0.5 - y), log(y), (x - z));
	}
	return tmp;
}

Julia

function code(x, y, z)
	tmp = 0.0
	if (x <= -3.3e+41)
		tmp = fma(Float64(-0.5 - y), log(y), Float64(y + x));
	elseif (x <= 2.5e+39)
		tmp = fma(Float64(-0.5 - y), log(y), Float64(y - z));
	else
		tmp = fma(Float64(-0.5 - y), log(y), Float64(x - z));
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := If[LessEqual[x, -3.3e+41], N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(y + x), $MachinePrecision]), $MachinePrecision], If[LessEqual[x, 2.5e+39], N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(y - z), $MachinePrecision]), $MachinePrecision], N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(x - z), $MachinePrecision]), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if x < -3.3e41

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-1 \cdot z} \]
   3. Step-by-step derivation

      1. lower-*.f64 30.1%

         \[\leadsto -1 \cdot \color{blue}{z} \]

   4. Applied rewrites 30.1%

      \[\leadsto \color{blue}{-1 \cdot z} \]

   5. Taylor expanded in z around 0

      \[\leadsto \color{blue}{\left(x + y\right) - \log y \cdot \left(\frac{1}{2} + y\right)} \]
   6. Step-by-step derivation

      1. lower--.f64 N/A

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

      2. lower-+.f64 N/A

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

      3. lower-*.f64 N/A

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

      4. lower-log.f64 N/A

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

      5. lower-+.f64 70.8%

         \[\leadsto \left(x + y\right) - \log y \cdot \left(0.5 + \color{blue}{y}\right) \]

   7. Applied rewrites 70.8%

      \[\leadsto \color{blue}{\left(x + y\right) - \log y \cdot \left(0.5 + y\right)} \]
   8. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. +-commutative N/A

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

      4. lower-*.f64 N/A

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

      5. *-commutative N/A

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

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

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

      7. add-flip N/A

         \[\leadsto \left(x + y\right) + \left(\mathsf{neg}\left(\left(y - \left(\mathsf{neg}\left(\frac{1}{2}\right)\right)\right)\right)\right) \cdot \log y \]

      8. metadata-eval N/A

         \[\leadsto \left(x + y\right) + \left(\mathsf{neg}\left(\left(y - \frac{-1}{2}\right)\right)\right) \cdot \log y \]

      9. sub-negate-rev N/A

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

      10. lift-log.f64 N/A

          \[\leadsto \left(x + y\right) + \left(\frac{-1}{2} - y\right) \cdot \log y \]

      11. +-commutative N/A

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

      12. lift--.f64 N/A

          \[\leadsto \left(\frac{-1}{2} - y\right) \cdot \log y + \left(x + y\right) \]

      13. lift-log.f64 N/A

          \[\leadsto \left(\frac{-1}{2} - y\right) \cdot \log y + \left(x + y\right) \]

      14. lower-fma.f64 70.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \color{blue}{\log y}, x + y\right) \]

      15. lift-+.f64 N/A

          \[\leadsto \mathsf{fma}\left(\frac{-1}{2} - y, \log y, x + y\right) \]

      16. +-commutative N/A

          \[\leadsto \mathsf{fma}\left(\frac{-1}{2} - y, \log y, y + x\right) \]

      17. lower-+.f64 70.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y + x\right) \]

   9. Applied rewrites 70.9%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \color{blue}{\log y}, y + x\right) \]

   if -3.3e41 < x < 2.50000000000000008e39

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. lift--.f64 N/A

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

      5. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

      7. associate-+l+ N/A

         \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

      8. +-commutative N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

      9. associate-+l+ N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

      10. lower-fma.f64 N/A

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

      11. lift-+.f64 N/A

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

      12. add-flip N/A

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

      13. sub-negate N/A

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

      14. lower--.f64 N/A

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

      15. metadata-eval N/A

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

      16. associate-+l- N/A

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

      17. lower--.f64 N/A

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

      18. lower--.f64 99.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]

   4. Taylor expanded in x around 0

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{z}\right) \]
   5. Step-by-step derivation

   6. Applied rewrites 71.1%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{z}\right) \]

   if 2.50000000000000008e39 < x

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. lift--.f64 N/A

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

      5. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

      7. associate-+l+ N/A

         \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

      8. +-commutative N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

      9. associate-+l+ N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

      10. lower-fma.f64 N/A

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

      11. lift-+.f64 N/A

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

      12. add-flip N/A

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

      13. sub-negate N/A

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

      14. lower--.f64 N/A

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

      15. metadata-eval N/A

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

      16. associate-+l- N/A

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

      17. lower--.f64 N/A

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

      18. lower--.f64 99.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]

   4. Taylor expanded in y around 0

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]
   5. Step-by-step derivation

      1. lower--.f64 79.1%

         \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x - \color{blue}{z}\right) \]

   6. Applied rewrites 79.1%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 4: 90.7% accurate, 0.8× speedup

Math

\[\begin{array}{l} t_0 := \mathsf{fma}\left(-0.5 - y, \log y, x - z\right)\\ \mathbf{if}\;x \leq -3.3 \cdot 10^{+41}:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;x \leq 2.5 \cdot 10^{+39}:\\ \;\;\;\;\mathsf{fma}\left(-0.5 - y, \log y, y - z\right)\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (fma (- -0.5 y) (log y) (- x z))))
   (if (<= x -3.3e+41)
     t_0
     (if (<= x 2.5e+39) (fma (- -0.5 y) (log y) (- y z)) t_0))))

C

double code(double x, double y, double z) {
	double t_0 = fma((-0.5 - y), log(y), (x - z));
	double tmp;
	if (x <= -3.3e+41) {
		tmp = t_0;
	} else if (x <= 2.5e+39) {
		tmp = fma((-0.5 - y), log(y), (y - z));
	} else {
		tmp = t_0;
	}
	return tmp;
}

Julia

function code(x, y, z)
	t_0 = fma(Float64(-0.5 - y), log(y), Float64(x - z))
	tmp = 0.0
	if (x <= -3.3e+41)
		tmp = t_0;
	elseif (x <= 2.5e+39)
		tmp = fma(Float64(-0.5 - y), log(y), Float64(y - z));
	else
		tmp = t_0;
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(x - z), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[x, -3.3e+41], t$95$0, If[LessEqual[x, 2.5e+39], N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(y - z), $MachinePrecision]), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if x < -3.3e41 or 2.50000000000000008e39 < x

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. lift--.f64 N/A

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

      5. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

      7. associate-+l+ N/A

         \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

      8. +-commutative N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

      9. associate-+l+ N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

      10. lower-fma.f64 N/A

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

      11. lift-+.f64 N/A

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

      12. add-flip N/A

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

      13. sub-negate N/A

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

      14. lower--.f64 N/A

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

      15. metadata-eval N/A

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

      16. associate-+l- N/A

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

      17. lower--.f64 N/A

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

      18. lower--.f64 99.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]

   4. Taylor expanded in y around 0

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]
   5. Step-by-step derivation

      1. lower--.f64 79.1%

         \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x - \color{blue}{z}\right) \]

   6. Applied rewrites 79.1%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]

   if -3.3e41 < x < 2.50000000000000008e39

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. lift--.f64 N/A

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

      5. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

      7. associate-+l+ N/A

         \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

      8. +-commutative N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

      9. associate-+l+ N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

      10. lower-fma.f64 N/A

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

      11. lift-+.f64 N/A

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

      12. add-flip N/A

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

      13. sub-negate N/A

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

      14. lower--.f64 N/A

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

      15. metadata-eval N/A

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

      16. associate-+l- N/A

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

      17. lower--.f64 N/A

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

      18. lower--.f64 99.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]

   4. Taylor expanded in x around 0

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{z}\right) \]
   5. Step-by-step derivation

   6. Applied rewrites 71.1%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{z}\right) \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 5: 90.0% accurate, 1.0× speedup

Math

\[\begin{array}{l} \mathbf{if}\;y \leq 1.4 \cdot 10^{+53}:\\ \;\;\;\;\mathsf{fma}\left(-0.5 - y, \log y, x - z\right)\\ \mathbf{else}:\\ \;\;\;\;\left(-\log y\right) \cdot y - \left(z - y\right)\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (<= y 1.4e+53)
   (fma (- -0.5 y) (log y) (- x z))
   (- (* (- (log y)) y) (- z y))))

C

double code(double x, double y, double z) {
	double tmp;
	if (y <= 1.4e+53) {
		tmp = fma((-0.5 - y), log(y), (x - z));
	} else {
		tmp = (-log(y) * y) - (z - y);
	}
	return tmp;
}

Julia

function code(x, y, z)
	tmp = 0.0
	if (y <= 1.4e+53)
		tmp = fma(Float64(-0.5 - y), log(y), Float64(x - z));
	else
		tmp = Float64(Float64(Float64(-log(y)) * y) - Float64(z - y));
	end
	return tmp
end

Wolfram

code[x_, y_, z_] := If[LessEqual[y, 1.4e+53], N[(N[(-0.5 - y), $MachinePrecision] * N[Log[y], $MachinePrecision] + N[(x - z), $MachinePrecision]), $MachinePrecision], N[(N[((-N[Log[y], $MachinePrecision]) * y), $MachinePrecision] - N[(z - y), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if y < 1.4e53

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. lift--.f64 N/A

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

      5. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} + \left(y - z\right) \]

      7. associate-+l+ N/A

         \[\leadsto \color{blue}{x + \left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right)} \]

      8. +-commutative N/A

         \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(y - z\right)\right) + x} \]

      9. associate-+l+ N/A

         \[\leadsto \color{blue}{\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + \left(\left(y - z\right) + x\right)} \]

      10. lower-fma.f64 N/A

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

      11. lift-+.f64 N/A

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

      12. add-flip N/A

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

      13. sub-negate N/A

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

      14. lower--.f64 N/A

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

      15. metadata-eval N/A

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

      16. associate-+l- N/A

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

      17. lower--.f64 N/A

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

      18. lower--.f64 99.9%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, y - \color{blue}{\left(z - x\right)}\right) \]

   3. Applied rewrites 99.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, y - \left(z - x\right)\right)} \]

   4. Taylor expanded in y around 0

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]
   5. Step-by-step derivation

      1. lower--.f64 79.1%

         \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x - \color{blue}{z}\right) \]

   6. Applied rewrites 79.1%

      \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, \color{blue}{x - z}\right) \]

   if 1.4e53 < y

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. sub-negate-rev N/A

         \[\leadsto \left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + \color{blue}{\left(\mathsf{neg}\left(\left(z - y\right)\right)\right)} \]

      5. sub-flip-reverse N/A

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

      6. lower--.f64 N/A

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

      7. lift--.f64 N/A

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

      8. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} - \left(z - y\right) \]

      10. +-commutative N/A

          \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + x\right)} - \left(z - y\right) \]

      11. lower-fma.f64 N/A

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

      12. lift-+.f64 N/A

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

      13. add-flip N/A

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

      14. sub-negate N/A

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

      15. lower--.f64 N/A

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

      16. metadata-eval N/A

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

      17. lower--.f64 99.8%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x\right) - \color{blue}{\left(z - y\right)} \]

   3. Applied rewrites 99.8%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, x\right) - \left(z - y\right)} \]

   4. Taylor expanded in y around inf

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

      1. lower-*.f64 N/A

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

      2. lower-log.f64 N/A

         \[\leadsto y \cdot \log \left(\frac{1}{y}\right) - \left(z - y\right) \]

      3. lower-/.f64 58.9%

         \[\leadsto y \cdot \log \left(\frac{1}{y}\right) - \left(z - y\right) \]

   6. Applied rewrites 58.9%

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

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lower-*.f64 58.9%

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

      4. lift-log.f64 N/A

         \[\leadsto \log \left(\frac{1}{y}\right) \cdot y - \left(z - y\right) \]

      5. lift-/.f64 N/A

         \[\leadsto \log \left(\frac{1}{y}\right) \cdot y - \left(z - y\right) \]

      6. log-rec N/A

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

      7. lift-log.f64 N/A

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

      8. lower-neg.f64 59.0%

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

   8. Applied rewrites 59.0%

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

Alternative 6: 89.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \mathbf{if}\;y \leq 1.4 \cdot 10^{+53}:\\ \;\;\;\;\left(x - \log \left(\sqrt{y}\right)\right) - z\\ \mathbf{else}:\\ \;\;\;\;\left(-\log y\right) \cdot y - \left(z - y\right)\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (<= y 1.4e+53) (- (- x (log (sqrt y))) z) (- (* (- (log y)) y) (- z y))))

C

double code(double x, double y, double z) {
	double tmp;
	if (y <= 1.4e+53) {
		tmp = (x - log(sqrt(y))) - z;
	} else {
		tmp = (-log(y) * y) - (z - y);
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: tmp
    if (y <= 1.4d+53) then
        tmp = (x - log(sqrt(y))) - z
    else
        tmp = (-log(y) * y) - (z - y)
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double tmp;
	if (y <= 1.4e+53) {
		tmp = (x - Math.log(Math.sqrt(y))) - z;
	} else {
		tmp = (-Math.log(y) * y) - (z - y);
	}
	return tmp;
}

Python

def code(x, y, z):
	tmp = 0
	if y <= 1.4e+53:
		tmp = (x - math.log(math.sqrt(y))) - z
	else:
		tmp = (-math.log(y) * y) - (z - y)
	return tmp

Julia

function code(x, y, z)
	tmp = 0.0
	if (y <= 1.4e+53)
		tmp = Float64(Float64(x - log(sqrt(y))) - z);
	else
		tmp = Float64(Float64(Float64(-log(y)) * y) - Float64(z - y));
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= 1.4e+53)
		tmp = (x - log(sqrt(y))) - z;
	else
		tmp = (-log(y) * y) - (z - y);
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := If[LessEqual[y, 1.4e+53], N[(N[(x - N[Log[N[Sqrt[y], $MachinePrecision]], $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision], N[(N[((-N[Log[y], $MachinePrecision]) * y), $MachinePrecision] - N[(z - y), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if y < 1.4e53

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around 0

      \[\leadsto \color{blue}{\left(x - \frac{1}{2} \cdot \log y\right)} - z \]
   3. Step-by-step derivation

      1. lower--.f64 N/A

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

      2. lower-*.f64 N/A

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

      3. lower-log.f64 70.3%

         \[\leadsto \left(x - 0.5 \cdot \log y\right) - z \]

   4. Applied rewrites 70.3%

      \[\leadsto \color{blue}{\left(x - 0.5 \cdot \log y\right)} - z \]
   5. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-*.f64 N/A

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

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

         \[\leadsto \left(x + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{2}\right)\right) \cdot \log y}\right) - z \]

      4. add-flip N/A

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

      5. lower--.f64 N/A

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

      6. metadata-eval N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\frac{-1}{2} \cdot \log y\right)\right)\right) - z \]

      7. lift-log.f64 N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\frac{-1}{2} \cdot \log y\right)\right)\right) - z \]

      8. log-pow-rev N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\log \left({y}^{\frac{-1}{2}}\right)\right)\right)\right) - z \]

      9. neg-log N/A

         \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      10. lower-pow.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      11. lower-unsound-pow.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      12. lower-/.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      13. lower-unsound-/.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      14. pow-neg N/A

          \[\leadsto \left(x - \log \left({y}^{\left(\mathsf{neg}\left(\frac{-1}{2}\right)\right)}\right)\right) - z \]

      15. metadata-eval N/A

          \[\leadsto \left(x - \log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      16. lower-log.f64 N/A

          \[\leadsto \left(x - \log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      17. unpow1/2 N/A

          \[\leadsto \left(x - \log \left(\sqrt{y}\right)\right) - z \]

      18. lower-sqrt.f64 70.3%

          \[\leadsto \left(x - \log \left(\sqrt{y}\right)\right) - z \]

   6. Applied rewrites 70.3%

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

   if 1.4e53 < y

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-+.f64 N/A

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

      3. associate--l+ N/A

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

      4. sub-negate-rev N/A

         \[\leadsto \left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + \color{blue}{\left(\mathsf{neg}\left(\left(z - y\right)\right)\right)} \]

      5. sub-flip-reverse N/A

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

      6. lower--.f64 N/A

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

      7. lift--.f64 N/A

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

      8. lift-*.f64 N/A

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

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

         \[\leadsto \color{blue}{\left(x + \left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y\right)} - \left(z - y\right) \]

      10. +-commutative N/A

          \[\leadsto \color{blue}{\left(\left(\mathsf{neg}\left(\left(y + \frac{1}{2}\right)\right)\right) \cdot \log y + x\right)} - \left(z - y\right) \]

      11. lower-fma.f64 N/A

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

      12. lift-+.f64 N/A

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

      13. add-flip N/A

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

      14. sub-negate N/A

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

      15. lower--.f64 N/A

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

      16. metadata-eval N/A

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

      17. lower--.f64 99.8%

          \[\leadsto \mathsf{fma}\left(-0.5 - y, \log y, x\right) - \color{blue}{\left(z - y\right)} \]

   3. Applied rewrites 99.8%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-0.5 - y, \log y, x\right) - \left(z - y\right)} \]

   4. Taylor expanded in y around inf

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

      1. lower-*.f64 N/A

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

      2. lower-log.f64 N/A

         \[\leadsto y \cdot \log \left(\frac{1}{y}\right) - \left(z - y\right) \]

      3. lower-/.f64 58.9%

         \[\leadsto y \cdot \log \left(\frac{1}{y}\right) - \left(z - y\right) \]

   6. Applied rewrites 58.9%

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

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lower-*.f64 58.9%

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

      4. lift-log.f64 N/A

         \[\leadsto \log \left(\frac{1}{y}\right) \cdot y - \left(z - y\right) \]

      5. lift-/.f64 N/A

         \[\leadsto \log \left(\frac{1}{y}\right) \cdot y - \left(z - y\right) \]

      6. log-rec N/A

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

      7. lift-log.f64 N/A

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

      8. lower-neg.f64 59.0%

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

   8. Applied rewrites 59.0%

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

Alternative 7: 83.7% accurate, 1.2× speedup

Math

\[\begin{array}{l} \mathbf{if}\;y \leq 4.6 \cdot 10^{+79}:\\ \;\;\;\;\left(x - \log \left(\sqrt{y}\right)\right) - z\\ \mathbf{else}:\\ \;\;\;\;\left(1 - \log y\right) \cdot y\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (<= y 4.6e+79) (- (- x (log (sqrt y))) z) (* (- 1.0 (log y)) y)))

C

double code(double x, double y, double z) {
	double tmp;
	if (y <= 4.6e+79) {
		tmp = (x - log(sqrt(y))) - z;
	} else {
		tmp = (1.0 - log(y)) * y;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: tmp
    if (y <= 4.6d+79) then
        tmp = (x - log(sqrt(y))) - z
    else
        tmp = (1.0d0 - log(y)) * y
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double tmp;
	if (y <= 4.6e+79) {
		tmp = (x - Math.log(Math.sqrt(y))) - z;
	} else {
		tmp = (1.0 - Math.log(y)) * y;
	}
	return tmp;
}

Python

def code(x, y, z):
	tmp = 0
	if y <= 4.6e+79:
		tmp = (x - math.log(math.sqrt(y))) - z
	else:
		tmp = (1.0 - math.log(y)) * y
	return tmp

Julia

function code(x, y, z)
	tmp = 0.0
	if (y <= 4.6e+79)
		tmp = Float64(Float64(x - log(sqrt(y))) - z);
	else
		tmp = Float64(Float64(1.0 - log(y)) * y);
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (y <= 4.6e+79)
		tmp = (x - log(sqrt(y))) - z;
	else
		tmp = (1.0 - log(y)) * y;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := If[LessEqual[y, 4.6e+79], N[(N[(x - N[Log[N[Sqrt[y], $MachinePrecision]], $MachinePrecision]), $MachinePrecision] - z), $MachinePrecision], N[(N[(1.0 - N[Log[y], $MachinePrecision]), $MachinePrecision] * y), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if y < 4.6000000000000001e79

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around 0

      \[\leadsto \color{blue}{\left(x - \frac{1}{2} \cdot \log y\right)} - z \]
   3. Step-by-step derivation

      1. lower--.f64 N/A

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

      2. lower-*.f64 N/A

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

      3. lower-log.f64 70.3%

         \[\leadsto \left(x - 0.5 \cdot \log y\right) - z \]

   4. Applied rewrites 70.3%

      \[\leadsto \color{blue}{\left(x - 0.5 \cdot \log y\right)} - z \]
   5. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. lift-*.f64 N/A

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

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

         \[\leadsto \left(x + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{2}\right)\right) \cdot \log y}\right) - z \]

      4. add-flip N/A

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

      5. lower--.f64 N/A

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

      6. metadata-eval N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\frac{-1}{2} \cdot \log y\right)\right)\right) - z \]

      7. lift-log.f64 N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\frac{-1}{2} \cdot \log y\right)\right)\right) - z \]

      8. log-pow-rev N/A

         \[\leadsto \left(x - \left(\mathsf{neg}\left(\log \left({y}^{\frac{-1}{2}}\right)\right)\right)\right) - z \]

      9. neg-log N/A

         \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      10. lower-pow.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      11. lower-unsound-pow.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      12. lower-/.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      13. lower-unsound-/.f32 N/A

          \[\leadsto \left(x - \log \left(\frac{1}{{y}^{\frac{-1}{2}}}\right)\right) - z \]

      14. pow-neg N/A

          \[\leadsto \left(x - \log \left({y}^{\left(\mathsf{neg}\left(\frac{-1}{2}\right)\right)}\right)\right) - z \]

      15. metadata-eval N/A

          \[\leadsto \left(x - \log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      16. lower-log.f64 N/A

          \[\leadsto \left(x - \log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      17. unpow1/2 N/A

          \[\leadsto \left(x - \log \left(\sqrt{y}\right)\right) - z \]

      18. lower-sqrt.f64 70.3%

          \[\leadsto \left(x - \log \left(\sqrt{y}\right)\right) - z \]

   6. Applied rewrites 70.3%

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

   if 4.6000000000000001e79 < y

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around -inf

      \[\leadsto \color{blue}{y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

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

      2. lower-+.f64 N/A

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

      3. lower-log.f64 N/A

         \[\leadsto y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right) \]

      4. lower-/.f64 31.0%

         \[\leadsto y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right) \]

   4. Applied rewrites 31.0%

      \[\leadsto \color{blue}{y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right)} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lower-*.f64 31.0%

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

      4. lift-+.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      5. lift-log.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      6. lift-/.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      7. log-rec N/A

         \[\leadsto \left(1 + \left(\mathsf{neg}\left(\log y\right)\right)\right) \cdot y \]

      8. lift-log.f64 N/A

         \[\leadsto \left(1 + \left(\mathsf{neg}\left(\log y\right)\right)\right) \cdot y \]

      9. sub-flip-reverse N/A

         \[\leadsto \left(1 - \log y\right) \cdot y \]

      10. lower--.f64 31.0%

          \[\leadsto \left(1 - \log y\right) \cdot y \]

   6. Applied rewrites 31.0%

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

Alternative 8: 72.2% accurate, 0.2× speedup

Math

\[\begin{array}{l} t_0 := \left(1 - \frac{z}{x}\right) \cdot x\\ t_1 := \left(x - \left(y + 0.5\right) \cdot \log y\right) + y\\ t_2 := \left(1 - \log y\right) \cdot y\\ \mathbf{if}\;t\_1 \leq -2 \cdot 10^{+238}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq -2 \cdot 10^{+201}:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;t\_1 \leq -5 \cdot 10^{+58}:\\ \;\;\;\;t\_2\\ \mathbf{elif}\;t\_1 \leq 500:\\ \;\;\;\;\left(-\log \left(\sqrt{y}\right)\right) - z\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (* (- 1.0 (/ z x)) x))
        (t_1 (+ (- x (* (+ y 0.5) (log y))) y))
        (t_2 (* (- 1.0 (log y)) y)))
   (if (<= t_1 -2e+238)
     t_2
     (if (<= t_1 -2e+201)
       t_0
       (if (<= t_1 -5e+58)
         t_2
         (if (<= t_1 500.0) (- (- (log (sqrt y))) z) t_0))))))

C

double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double t_1 = (x - ((y + 0.5) * log(y))) + y;
	double t_2 = (1.0 - log(y)) * y;
	double tmp;
	if (t_1 <= -2e+238) {
		tmp = t_2;
	} else if (t_1 <= -2e+201) {
		tmp = t_0;
	} else if (t_1 <= -5e+58) {
		tmp = t_2;
	} else if (t_1 <= 500.0) {
		tmp = -log(sqrt(y)) - z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: t_2
    real(8) :: tmp
    t_0 = (1.0d0 - (z / x)) * x
    t_1 = (x - ((y + 0.5d0) * log(y))) + y
    t_2 = (1.0d0 - log(y)) * y
    if (t_1 <= (-2d+238)) then
        tmp = t_2
    else if (t_1 <= (-2d+201)) then
        tmp = t_0
    else if (t_1 <= (-5d+58)) then
        tmp = t_2
    else if (t_1 <= 500.0d0) then
        tmp = -log(sqrt(y)) - z
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double t_1 = (x - ((y + 0.5) * Math.log(y))) + y;
	double t_2 = (1.0 - Math.log(y)) * y;
	double tmp;
	if (t_1 <= -2e+238) {
		tmp = t_2;
	} else if (t_1 <= -2e+201) {
		tmp = t_0;
	} else if (t_1 <= -5e+58) {
		tmp = t_2;
	} else if (t_1 <= 500.0) {
		tmp = -Math.log(Math.sqrt(y)) - z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

def code(x, y, z):
	t_0 = (1.0 - (z / x)) * x
	t_1 = (x - ((y + 0.5) * math.log(y))) + y
	t_2 = (1.0 - math.log(y)) * y
	tmp = 0
	if t_1 <= -2e+238:
		tmp = t_2
	elif t_1 <= -2e+201:
		tmp = t_0
	elif t_1 <= -5e+58:
		tmp = t_2
	elif t_1 <= 500.0:
		tmp = -math.log(math.sqrt(y)) - z
	else:
		tmp = t_0
	return tmp

Julia

function code(x, y, z)
	t_0 = Float64(Float64(1.0 - Float64(z / x)) * x)
	t_1 = Float64(Float64(x - Float64(Float64(y + 0.5) * log(y))) + y)
	t_2 = Float64(Float64(1.0 - log(y)) * y)
	tmp = 0.0
	if (t_1 <= -2e+238)
		tmp = t_2;
	elseif (t_1 <= -2e+201)
		tmp = t_0;
	elseif (t_1 <= -5e+58)
		tmp = t_2;
	elseif (t_1 <= 500.0)
		tmp = Float64(Float64(-log(sqrt(y))) - z);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	t_0 = (1.0 - (z / x)) * x;
	t_1 = (x - ((y + 0.5) * log(y))) + y;
	t_2 = (1.0 - log(y)) * y;
	tmp = 0.0;
	if (t_1 <= -2e+238)
		tmp = t_2;
	elseif (t_1 <= -2e+201)
		tmp = t_0;
	elseif (t_1 <= -5e+58)
		tmp = t_2;
	elseif (t_1 <= 500.0)
		tmp = -log(sqrt(y)) - z;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(N[(1.0 - N[(z / x), $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]}, Block[{t$95$1 = N[(N[(x - N[(N[(y + 0.5), $MachinePrecision] * N[Log[y], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + y), $MachinePrecision]}, Block[{t$95$2 = N[(N[(1.0 - N[Log[y], $MachinePrecision]), $MachinePrecision] * y), $MachinePrecision]}, If[LessEqual[t$95$1, -2e+238], t$95$2, If[LessEqual[t$95$1, -2e+201], t$95$0, If[LessEqual[t$95$1, -5e+58], t$95$2, If[LessEqual[t$95$1, 500.0], N[((-N[Log[N[Sqrt[y], $MachinePrecision]], $MachinePrecision]) - z), $MachinePrecision], t$95$0]]]]]]]

Derivation

1. Split input into 3 regimes

2. if (+.f64 (-.f64 x (*.f64 (+.f64 y #s(literal 1/2 binary64)) (log.f64 y))) y) < -2.0000000000000001e238 or -2.00000000000000008e201 < (+.f64 (-.f64 x (*.f64 (+.f64 y #s(literal 1/2 binary64)) (log.f64 y))) y) < -4.99999999999999986e58

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around -inf

      \[\leadsto \color{blue}{y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right)} \]
   3. Step-by-step derivation

      1. lower-*.f64 N/A

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

      2. lower-+.f64 N/A

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

      3. lower-log.f64 N/A

         \[\leadsto y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right) \]

      4. lower-/.f64 31.0%

         \[\leadsto y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right) \]

   4. Applied rewrites 31.0%

      \[\leadsto \color{blue}{y \cdot \left(1 + \log \left(\frac{1}{y}\right)\right)} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

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

      2. *-commutative N/A

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

      3. lower-*.f64 31.0%

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

      4. lift-+.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      5. lift-log.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      6. lift-/.f64 N/A

         \[\leadsto \left(1 + \log \left(\frac{1}{y}\right)\right) \cdot y \]

      7. log-rec N/A

         \[\leadsto \left(1 + \left(\mathsf{neg}\left(\log y\right)\right)\right) \cdot y \]

      8. lift-log.f64 N/A

         \[\leadsto \left(1 + \left(\mathsf{neg}\left(\log y\right)\right)\right) \cdot y \]

      9. sub-flip-reverse N/A

         \[\leadsto \left(1 - \log y\right) \cdot y \]

      10. lower--.f64 31.0%

          \[\leadsto \left(1 - \log y\right) \cdot y \]

   6. Applied rewrites 31.0%

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

   if -2.0000000000000001e238 < (+.f64 (-.f64 x (*.f64 (+.f64 y #s(literal 1/2 binary64)) (log.f64 y))) y) < -2.00000000000000008e201 or 500 < (+.f64 (-.f64 x (*.f64 (+.f64 y #s(literal 1/2 binary64)) (log.f64 y))) y)

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. sub-flip N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right) + \left(\mathsf{neg}\left(z\right)\right)} \]

      3. lift-+.f64 N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      4. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right)} + y\right) + \left(\mathsf{neg}\left(z\right)\right) \]

      5. associate-+l- N/A

         \[\leadsto \color{blue}{\left(x - \left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right)\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      6. associate-+l- N/A

         \[\leadsto \color{blue}{x - \left(\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)\right)} \]

      7. sub-to-mult N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

      8. lower-unsound-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

   3. Applied rewrites 79.9%

      \[\leadsto \color{blue}{\left(1 - \frac{z - \mathsf{fma}\left(-0.5 - y, \log y, y\right)}{x}\right) \cdot x} \]

   4. Taylor expanded in z around inf

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

      1. lower-/.f64 48.3%

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

   6. Applied rewrites 48.3%

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

   if -4.99999999999999986e58 < (+.f64 (-.f64 x (*.f64 (+.f64 y #s(literal 1/2 binary64)) (log.f64 y))) y) < 500

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around 0

      \[\leadsto \color{blue}{\left(x - \frac{1}{2} \cdot \log y\right)} - z \]
   3. Step-by-step derivation

      1. lower--.f64 N/A

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

      2. lower-*.f64 N/A

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

      3. lower-log.f64 70.3%

         \[\leadsto \left(x - 0.5 \cdot \log y\right) - z \]

   4. Applied rewrites 70.3%

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

   5. Taylor expanded in x around 0

      \[\leadsto \frac{-1}{2} \cdot \color{blue}{\log y} - z \]
   6. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{-1}{2} \cdot \log y - z \]

      2. lower-log.f64 42.5%

         \[\leadsto -0.5 \cdot \log y - z \]

   7. Applied rewrites 42.5%

      \[\leadsto -0.5 \cdot \color{blue}{\log y} - z \]
   8. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \frac{-1}{2} \cdot \log y - z \]

      2. metadata-eval N/A

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2}\right)\right) \cdot \log y - z \]

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

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2} \cdot \log y\right)\right) - z \]

      4. lift-log.f64 N/A

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2} \cdot \log y\right)\right) - z \]

      5. lower-neg.f64 N/A

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

      6. log-pow-rev N/A

         \[\leadsto \left(-\log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      7. lower-log.f64 N/A

         \[\leadsto \left(-\log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      8. unpow1/2 N/A

         \[\leadsto \left(-\log \left(\sqrt{y}\right)\right) - z \]

      9. lower-sqrt.f64 42.5%

         \[\leadsto \left(-\log \left(\sqrt{y}\right)\right) - z \]

   9. Applied rewrites 42.5%

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

Alternative 9: 69.8% accurate, 1.0× speedup

Math

\[\begin{array}{l} t_0 := \left(1 - \frac{z}{x}\right) \cdot x\\ \mathbf{if}\;x \leq -3450:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;x \leq 42000000:\\ \;\;\;\;\left(-\log \left(\sqrt{y}\right)\right) - z\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (* (- 1.0 (/ z x)) x)))
   (if (<= x -3450.0)
     t_0
     (if (<= x 42000000.0) (- (- (log (sqrt y))) z) t_0))))

C

double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double tmp;
	if (x <= -3450.0) {
		tmp = t_0;
	} else if (x <= 42000000.0) {
		tmp = -log(sqrt(y)) - z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = (1.0d0 - (z / x)) * x
    if (x <= (-3450.0d0)) then
        tmp = t_0
    else if (x <= 42000000.0d0) then
        tmp = -log(sqrt(y)) - z
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double tmp;
	if (x <= -3450.0) {
		tmp = t_0;
	} else if (x <= 42000000.0) {
		tmp = -Math.log(Math.sqrt(y)) - z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

def code(x, y, z):
	t_0 = (1.0 - (z / x)) * x
	tmp = 0
	if x <= -3450.0:
		tmp = t_0
	elif x <= 42000000.0:
		tmp = -math.log(math.sqrt(y)) - z
	else:
		tmp = t_0
	return tmp

Julia

function code(x, y, z)
	t_0 = Float64(Float64(1.0 - Float64(z / x)) * x)
	tmp = 0.0
	if (x <= -3450.0)
		tmp = t_0;
	elseif (x <= 42000000.0)
		tmp = Float64(Float64(-log(sqrt(y))) - z);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	t_0 = (1.0 - (z / x)) * x;
	tmp = 0.0;
	if (x <= -3450.0)
		tmp = t_0;
	elseif (x <= 42000000.0)
		tmp = -log(sqrt(y)) - z;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(N[(1.0 - N[(z / x), $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]}, If[LessEqual[x, -3450.0], t$95$0, If[LessEqual[x, 42000000.0], N[((-N[Log[N[Sqrt[y], $MachinePrecision]], $MachinePrecision]) - z), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if x < -3450 or 4.2e7 < x

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. sub-flip N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right) + \left(\mathsf{neg}\left(z\right)\right)} \]

      3. lift-+.f64 N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      4. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right)} + y\right) + \left(\mathsf{neg}\left(z\right)\right) \]

      5. associate-+l- N/A

         \[\leadsto \color{blue}{\left(x - \left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right)\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      6. associate-+l- N/A

         \[\leadsto \color{blue}{x - \left(\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)\right)} \]

      7. sub-to-mult N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

      8. lower-unsound-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

   3. Applied rewrites 79.9%

      \[\leadsto \color{blue}{\left(1 - \frac{z - \mathsf{fma}\left(-0.5 - y, \log y, y\right)}{x}\right) \cdot x} \]

   4. Taylor expanded in z around inf

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

      1. lower-/.f64 48.3%

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

   6. Applied rewrites 48.3%

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

   if -3450 < x < 4.2e7

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in y around 0

      \[\leadsto \color{blue}{\left(x - \frac{1}{2} \cdot \log y\right)} - z \]
   3. Step-by-step derivation

      1. lower--.f64 N/A

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

      2. lower-*.f64 N/A

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

      3. lower-log.f64 70.3%

         \[\leadsto \left(x - 0.5 \cdot \log y\right) - z \]

   4. Applied rewrites 70.3%

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

   5. Taylor expanded in x around 0

      \[\leadsto \frac{-1}{2} \cdot \color{blue}{\log y} - z \]
   6. Step-by-step derivation

      1. lower-*.f64 N/A

         \[\leadsto \frac{-1}{2} \cdot \log y - z \]

      2. lower-log.f64 42.5%

         \[\leadsto -0.5 \cdot \log y - z \]

   7. Applied rewrites 42.5%

      \[\leadsto -0.5 \cdot \color{blue}{\log y} - z \]
   8. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \frac{-1}{2} \cdot \log y - z \]

      2. metadata-eval N/A

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2}\right)\right) \cdot \log y - z \]

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

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2} \cdot \log y\right)\right) - z \]

      4. lift-log.f64 N/A

         \[\leadsto \left(\mathsf{neg}\left(\frac{1}{2} \cdot \log y\right)\right) - z \]

      5. lower-neg.f64 N/A

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

      6. log-pow-rev N/A

         \[\leadsto \left(-\log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      7. lower-log.f64 N/A

         \[\leadsto \left(-\log \left({y}^{\frac{1}{2}}\right)\right) - z \]

      8. unpow1/2 N/A

         \[\leadsto \left(-\log \left(\sqrt{y}\right)\right) - z \]

      9. lower-sqrt.f64 42.5%

         \[\leadsto \left(-\log \left(\sqrt{y}\right)\right) - z \]

   9. Applied rewrites 42.5%

      \[\leadsto \color{blue}{\left(-\log \left(\sqrt{y}\right)\right)} - z \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 10: 57.4% accurate, 1.2× speedup

Math

\[\begin{array}{l} t_0 := \left(1 - \frac{z}{x}\right) \cdot x\\ \mathbf{if}\;x \leq -1520:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;x \leq 7.5 \cdot 10^{-75}:\\ \;\;\;\;-z\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (let* ((t_0 (* (- 1.0 (/ z x)) x)))
   (if (<= x -1520.0) t_0 (if (<= x 7.5e-75) (- z) t_0))))

C

double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double tmp;
	if (x <= -1520.0) {
		tmp = t_0;
	} else if (x <= 7.5e-75) {
		tmp = -z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: t_0
    real(8) :: tmp
    t_0 = (1.0d0 - (z / x)) * x
    if (x <= (-1520.0d0)) then
        tmp = t_0
    else if (x <= 7.5d-75) then
        tmp = -z
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double t_0 = (1.0 - (z / x)) * x;
	double tmp;
	if (x <= -1520.0) {
		tmp = t_0;
	} else if (x <= 7.5e-75) {
		tmp = -z;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

def code(x, y, z):
	t_0 = (1.0 - (z / x)) * x
	tmp = 0
	if x <= -1520.0:
		tmp = t_0
	elif x <= 7.5e-75:
		tmp = -z
	else:
		tmp = t_0
	return tmp

Julia

function code(x, y, z)
	t_0 = Float64(Float64(1.0 - Float64(z / x)) * x)
	tmp = 0.0
	if (x <= -1520.0)
		tmp = t_0;
	elseif (x <= 7.5e-75)
		tmp = Float64(-z);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	t_0 = (1.0 - (z / x)) * x;
	tmp = 0.0;
	if (x <= -1520.0)
		tmp = t_0;
	elseif (x <= 7.5e-75)
		tmp = -z;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := Block[{t$95$0 = N[(N[(1.0 - N[(z / x), $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]}, If[LessEqual[x, -1520.0], t$95$0, If[LessEqual[x, 7.5e-75], (-z), t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if x < -1520 or 7.50000000000000017e-75 < x

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. sub-flip N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right) + \left(\mathsf{neg}\left(z\right)\right)} \]

      3. lift-+.f64 N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      4. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right)} + y\right) + \left(\mathsf{neg}\left(z\right)\right) \]

      5. associate-+l- N/A

         \[\leadsto \color{blue}{\left(x - \left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right)\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      6. associate-+l- N/A

         \[\leadsto \color{blue}{x - \left(\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)\right)} \]

      7. sub-to-mult N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

      8. lower-unsound-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

   3. Applied rewrites 79.9%

      \[\leadsto \color{blue}{\left(1 - \frac{z - \mathsf{fma}\left(-0.5 - y, \log y, y\right)}{x}\right) \cdot x} \]

   4. Taylor expanded in z around inf

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

      1. lower-/.f64 48.3%

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

   6. Applied rewrites 48.3%

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

   if -1520 < x < 7.50000000000000017e-75

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-1 \cdot z} \]
   3. Step-by-step derivation

      1. lower-*.f64 30.1%

         \[\leadsto -1 \cdot \color{blue}{z} \]

   4. Applied rewrites 30.1%

      \[\leadsto \color{blue}{-1 \cdot z} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{z} \]

      2. mul-1-neg N/A

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

      3. lift-neg.f64 30.1%

         \[\leadsto -z \]

   6. Applied rewrites 30.1%

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

Alternative 11: 48.3% accurate, 1.8× speedup

Math

\[\begin{array}{l} \mathbf{if}\;x \leq -6 \cdot 10^{+39}:\\ \;\;\;\;1 \cdot x\\ \mathbf{elif}\;x \leq 2.65 \cdot 10^{+42}:\\ \;\;\;\;-z\\ \mathbf{else}:\\ \;\;\;\;1 \cdot x\\ \end{array} \]

FPCore

(FPCore (x y z)
 :precision binary64
 (if (<= x -6e+39) (* 1.0 x) (if (<= x 2.65e+42) (- z) (* 1.0 x))))

C

double code(double x, double y, double z) {
	double tmp;
	if (x <= -6e+39) {
		tmp = 1.0 * x;
	} else if (x <= 2.65e+42) {
		tmp = -z;
	} else {
		tmp = 1.0 * x;
	}
	return tmp;
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x, y, z)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8) :: tmp
    if (x <= (-6d+39)) then
        tmp = 1.0d0 * x
    else if (x <= 2.65d+42) then
        tmp = -z
    else
        tmp = 1.0d0 * x
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z) {
	double tmp;
	if (x <= -6e+39) {
		tmp = 1.0 * x;
	} else if (x <= 2.65e+42) {
		tmp = -z;
	} else {
		tmp = 1.0 * x;
	}
	return tmp;
}

Python

def code(x, y, z):
	tmp = 0
	if x <= -6e+39:
		tmp = 1.0 * x
	elif x <= 2.65e+42:
		tmp = -z
	else:
		tmp = 1.0 * x
	return tmp

Julia

function code(x, y, z)
	tmp = 0.0
	if (x <= -6e+39)
		tmp = Float64(1.0 * x);
	elseif (x <= 2.65e+42)
		tmp = Float64(-z);
	else
		tmp = Float64(1.0 * x);
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z)
	tmp = 0.0;
	if (x <= -6e+39)
		tmp = 1.0 * x;
	elseif (x <= 2.65e+42)
		tmp = -z;
	else
		tmp = 1.0 * x;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_] := If[LessEqual[x, -6e+39], N[(1.0 * x), $MachinePrecision], If[LessEqual[x, 2.65e+42], (-z), N[(1.0 * x), $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if x < -5.9999999999999999e39 or 2.65000000000000014e42 < x

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]
   2. Step-by-step derivation

      1. lift--.f64 N/A

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

      2. sub-flip N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right) + \left(\mathsf{neg}\left(z\right)\right)} \]

      3. lift-+.f64 N/A

         \[\leadsto \color{blue}{\left(\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right) + y\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      4. lift--.f64 N/A

         \[\leadsto \left(\color{blue}{\left(x - \left(y + \frac{1}{2}\right) \cdot \log y\right)} + y\right) + \left(\mathsf{neg}\left(z\right)\right) \]

      5. associate-+l- N/A

         \[\leadsto \color{blue}{\left(x - \left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right)\right)} + \left(\mathsf{neg}\left(z\right)\right) \]

      6. associate-+l- N/A

         \[\leadsto \color{blue}{x - \left(\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)\right)} \]

      7. sub-to-mult N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

      8. lower-unsound-*.f64 N/A

         \[\leadsto \color{blue}{\left(1 - \frac{\left(\left(y + \frac{1}{2}\right) \cdot \log y - y\right) - \left(\mathsf{neg}\left(z\right)\right)}{x}\right) \cdot x} \]

   3. Applied rewrites 79.9%

      \[\leadsto \color{blue}{\left(1 - \frac{z - \mathsf{fma}\left(-0.5 - y, \log y, y\right)}{x}\right) \cdot x} \]

   4. Taylor expanded in x around inf

      \[\leadsto \color{blue}{1} \cdot x \]
   5. Step-by-step derivation

   6. Applied rewrites 29.7%

      \[\leadsto \color{blue}{1} \cdot x \]

   if -5.9999999999999999e39 < x < 2.65000000000000014e42

   1. Initial program 99.8%

      \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

   2. Taylor expanded in z around inf

      \[\leadsto \color{blue}{-1 \cdot z} \]
   3. Step-by-step derivation

      1. lower-*.f64 30.1%

         \[\leadsto -1 \cdot \color{blue}{z} \]

   4. Applied rewrites 30.1%

      \[\leadsto \color{blue}{-1 \cdot z} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto -1 \cdot \color{blue}{z} \]

      2. mul-1-neg N/A

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

      3. lift-neg.f64 30.1%

         \[\leadsto -z \]

   6. Applied rewrites 30.1%

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

Alternative 12: 30.1% accurate, 10.4× speedup

Math

\[-z \]

FPCore

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

C

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

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

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

Java

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

Python

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

Julia

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

MATLAB

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

Wolfram

code[x_, y_, z_] := (-z)

Derivation

1. Initial program 99.8%

   \[\left(\left(x - \left(y + 0.5\right) \cdot \log y\right) + y\right) - z \]

2. Taylor expanded in z around inf

   \[\leadsto \color{blue}{-1 \cdot z} \]
3. Step-by-step derivation

   1. lower-*.f64 30.1%

      \[\leadsto -1 \cdot \color{blue}{z} \]

4. Applied rewrites 30.1%

   \[\leadsto \color{blue}{-1 \cdot z} \]
5. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto -1 \cdot \color{blue}{z} \]

   2. mul-1-neg N/A

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

   3. lift-neg.f64 30.1%

      \[\leadsto -z \]

6. Applied rewrites 30.1%

   \[\leadsto \color{blue}{-z} \]
7. Add Preprocessing

Reproduce

herbie shell --seed 2025181 
(FPCore (x y z)
  :name "Numeric.SpecFunctions:stirlingError from math-functions-0.1.5.2"
  :precision binary64
  (- (+ (- x (* (+ y 0.5) (log y))) y) z))