expfmod (used to be hard to sample)

Percentage Accurate: 9.3% → 39.4%

Time: 16.8s

Alternatives: 12

Speedup: 1.9×

• could not determine a ground truth

  1. x = -869291272819.833

Specification

Math

\[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod (exp x) (sqrt (cos x))) (exp (- x))))

C

double code(double x) {
	return fmod(exp(x), sqrt(cos(x))) * exp(-x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod(exp(x), sqrt(cos(x))) * exp(-x)
end function

Python

def code(x):
	return math.fmod(math.exp(x), math.sqrt(math.cos(x))) * math.exp(-x)

Julia

function code(x)
	return Float64(rem(exp(x), sqrt(cos(x))) * exp(Float64(-x)))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = N[Exp[x], $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]

Initial Program: 9.3% accurate, 1.0× speedup

Math

\[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod (exp x) (sqrt (cos x))) (exp (- x))))

C

double code(double x) {
	return fmod(exp(x), sqrt(cos(x))) * exp(-x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod(exp(x), sqrt(cos(x))) * exp(-x)
end function

Python

def code(x):
	return math.fmod(math.exp(x), math.sqrt(math.cos(x))) * math.exp(-x)

Julia

function code(x)
	return Float64(rem(exp(x), sqrt(cos(x))) * exp(Float64(-x)))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = N[Exp[x], $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]

Alternative 1: 39.4% accurate, 1.7× speedup

Math

\[\begin{array}{l} \mathbf{if}\;x \leq 0.27:\\ \;\;\;\;\frac{1}{\frac{1 + x}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}\\ \mathbf{else}:\\ \;\;\;\;\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x}\\ \end{array} \]

FPCore

(FPCore (x)
  :precision binary64
  (if (<= x 0.27)
  (/ 1.0 (/ (+ 1.0 x) (fmod (- x -1.0) (sqrt (cos x)))))
  (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) (exp (- x)))))

C

double code(double x) {
	double tmp;
	if (x <= 0.27) {
		tmp = 1.0 / ((1.0 + x) / fmod((x - -1.0), sqrt(cos(x))));
	} else {
		tmp = fmod(1.0, (((x * x) * -0.25) - -1.0)) * exp(-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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8) :: tmp
    if (x <= 0.27d0) then
        tmp = 1.0d0 / ((1.0d0 + x) / mod((x - (-1.0d0)), sqrt(cos(x))))
    else
        tmp = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * exp(-x)
    end if
    code = tmp
end function

Python

def code(x):
	tmp = 0
	if x <= 0.27:
		tmp = 1.0 / ((1.0 + x) / math.fmod((x - -1.0), math.sqrt(math.cos(x))))
	else:
		tmp = math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * math.exp(-x)
	return tmp

Julia

function code(x)
	tmp = 0.0
	if (x <= 0.27)
		tmp = Float64(1.0 / Float64(Float64(1.0 + x) / rem(Float64(x - -1.0), sqrt(cos(x)))));
	else
		tmp = Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * exp(Float64(-x)));
	end
	return tmp
end

Wolfram

code[x_] := If[LessEqual[x, 0.27], N[(1.0 / N[(N[(1.0 + x), $MachinePrecision] / N[With[{TMP1 = N[(x - -1.0), $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < 0.27000000000000002

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

      1. lower-+.f64 38.5%

         \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   4. Applied rewrites 38.5%

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   5. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \color{blue}{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x}} \]

      2. lift-exp.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{e^{-x}} \]

      3. lift-neg.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{\color{blue}{\mathsf{neg}\left(x\right)}} \]

      4. exp-neg N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\frac{1}{e^{x}}} \]

      5. lift-exp.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \frac{1}{\color{blue}{e^{x}}} \]

      6. mult-flip-rev N/A

         \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

      7. lower-/.f64 38.5%

         \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

      8. lift-+.f64 N/A

         \[\leadsto \frac{\left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

      9. +-commutative N/A

         \[\leadsto \frac{\left(\left(x + \color{blue}{1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

      10. add-flip N/A

          \[\leadsto \frac{\left(\left(x - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

      11. metadata-eval N/A

          \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

      12. lower--.f64 38.5%

          \[\leadsto \frac{\left(\left(x - \color{blue}{-1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   6. Applied rewrites 38.5%

      \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]
   7. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

      2. div-flip N/A

         \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

      3. lower-unsound-/.f64 N/A

         \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

      4. lower-unsound-/.f64 38.5%

         \[\leadsto \frac{1}{\color{blue}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

   8. Applied rewrites 38.5%

      \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

   9. Taylor expanded in x around 0

      \[\leadsto \frac{1}{\frac{\color{blue}{1 + x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}} \]
   10. Step-by-step derivation

       1. lower-+.f64 10.2%

          \[\leadsto \frac{1}{\frac{1 + \color{blue}{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}} \]

   11. Applied rewrites 10.2%

       \[\leadsto \frac{1}{\frac{\color{blue}{1 + x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}} \]

   if 0.27000000000000002 < x

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

   4. Applied rewrites 34.9%

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 34.9%

         \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      5. lower--.f64 34.9%

         \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 34.9%

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

      9. lift-pow.f64 N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      10. unpow2 N/A

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      11. lower-*.f64 34.9%

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 2: 39.0% accurate, 0.6× speedup

Math

\[\begin{array}{l} t_0 := e^{-x}\\ \mathbf{if}\;\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot t\_0 \leq 2:\\ \;\;\;\;\left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - 0.25 \cdot \left(x \cdot x\right)\right)\right) \cdot t\_0\\ \mathbf{else}:\\ \;\;\;\;\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot t\_0\\ \end{array} \]

FPCore

(FPCore (x)
  :precision binary64
  (let* ((t_0 (exp (- x))))
  (if (<= (* (fmod (exp x) (sqrt (cos x))) t_0) 2.0)
    (*
     (fmod (- (* (- (* 0.5 x) -1.0) x) -1.0) (- 1.0 (* 0.25 (* x x))))
     t_0)
    (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) t_0))))

C

double code(double x) {
	double t_0 = exp(-x);
	double tmp;
	if ((fmod(exp(x), sqrt(cos(x))) * t_0) <= 2.0) {
		tmp = fmod(((((0.5 * x) - -1.0) * x) - -1.0), (1.0 - (0.25 * (x * x)))) * t_0;
	} else {
		tmp = fmod(1.0, (((x * x) * -0.25) - -1.0)) * 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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: tmp
    t_0 = exp(-x)
    if ((mod(exp(x), sqrt(cos(x))) * t_0) <= 2.0d0) then
        tmp = mod(((((0.5d0 * x) - (-1.0d0)) * x) - (-1.0d0)), (1.0d0 - (0.25d0 * (x * x)))) * t_0
    else
        tmp = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * t_0
    end if
    code = tmp
end function

Python

def code(x):
	t_0 = math.exp(-x)
	tmp = 0
	if (math.fmod(math.exp(x), math.sqrt(math.cos(x))) * t_0) <= 2.0:
		tmp = math.fmod(((((0.5 * x) - -1.0) * x) - -1.0), (1.0 - (0.25 * (x * x)))) * t_0
	else:
		tmp = math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * t_0
	return tmp

Julia

function code(x)
	t_0 = exp(Float64(-x))
	tmp = 0.0
	if (Float64(rem(exp(x), sqrt(cos(x))) * t_0) <= 2.0)
		tmp = Float64(rem(Float64(Float64(Float64(Float64(0.5 * x) - -1.0) * x) - -1.0), Float64(1.0 - Float64(0.25 * Float64(x * x)))) * t_0);
	else
		tmp = Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * t_0);
	end
	return tmp
end

Wolfram

code[x_] := Block[{t$95$0 = N[Exp[(-x)], $MachinePrecision]}, If[LessEqual[N[(N[With[{TMP1 = N[Exp[x], $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$0), $MachinePrecision], 2.0], N[(N[With[{TMP1 = N[(N[(N[(N[(0.5 * x), $MachinePrecision] - -1.0), $MachinePrecision] * x), $MachinePrecision] - -1.0), $MachinePrecision], TMP2 = N[(1.0 - N[(0.25 * N[(x * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$0), $MachinePrecision], N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$0), $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x))) < 2

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{\left(1 + x \cdot \left(1 + \frac{1}{2} \cdot x\right)\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + \color{blue}{x \cdot \left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \color{blue}{\left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      3. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \left(1 + \color{blue}{\frac{1}{2} \cdot x}\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      4. lower-*.f64 22.8%

         \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot \color{blue}{x}\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   4. Applied rewrites 22.8%

      \[\leadsto \left(\color{blue}{\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \left(1 + \frac{1}{2} \cdot x\right)\right) \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \left(1 + \frac{1}{2} \cdot x\right)\right) \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 22.8%

         \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 22.8%

      \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(\left(1 + \color{blue}{x \cdot \left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) + \color{blue}{1}\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      5. lower--.f64 22.8%

         \[\leadsto \left(\left(x \cdot \left(1 + 0.5 \cdot x\right) - \color{blue}{-1}\right) \bmod \left(1 + -0.25 \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(\left(\left(1 + \frac{1}{2} \cdot x\right) \cdot x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 22.8%

         \[\leadsto \left(\left(\left(1 + 0.5 \cdot x\right) \cdot x - -1\right) \bmod \left(1 + -0.25 \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      9. lift-+.f64 N/A

         \[\leadsto \left(\left(\left(1 + \frac{1}{2} \cdot x\right) \cdot x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      10. +-commutative N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x + 1\right) \cdot x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      11. add-flip N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - \left(\mathsf{neg}\left(1\right)\right)\right) \cdot x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      12. metadata-eval N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      13. lower--.f64 22.8%

          \[\leadsto \left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 + -0.25 \cdot {x}^{2}\right)\right) \cdot e^{-x} \]

      14. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \mathsf{Rewrite=>}\left(lift-+.f64, \left(1 + \frac{-1}{4} \cdot {x}^{2}\right)\right)\right) \cdot e^{-x} \]

      15. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 + \mathsf{Rewrite=>}\left(lift-*.f64, \left(\frac{-1}{4} \cdot {x}^{2}\right)\right)\right)\right) \cdot e^{-x} \]

      16. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \mathsf{Rewrite=>}\left(fp-cancel-sign-sub-inv, \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot {x}^{2}\right)\right)\right) \cdot e^{-x} \]

      17. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \mathsf{Rewrite=>}\left(lower--.f64, \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot {x}^{2}\right)\right)\right) \cdot e^{-x} \]

      18. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot \mathsf{Rewrite=>}\left(lift-pow.f64, \left({x}^{2}\right)\right)\right)\right) \cdot e^{-x} \]

      19. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot \mathsf{Rewrite=>}\left(unpow2, \left(x \cdot x\right)\right)\right)\right) \cdot e^{-x} \]

      20. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot \mathsf{Rewrite=>}\left(lower-*.f32, \left(x \cdot x\right)\right)\right)\right) \cdot e^{-x} \]

      21. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - \left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot \mathsf{Rewrite<=}\left(lower-unsound-*.f32, \left(x \cdot x\right)\right)\right)\right) \cdot e^{-x} \]

      22. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - \mathsf{Rewrite=>}\left(lower-*.f64, \left(\left(\mathsf{neg}\left(\frac{-1}{4}\right)\right) \cdot \left(x \cdot x\right)\right)\right)\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 22.8%

      \[\leadsto \color{blue}{\left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(1 - 0.25 \cdot \left(x \cdot x\right)\right)\right)} \cdot e^{-x} \]

   if 2 < (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x)))

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

   4. Applied rewrites 34.9%

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 34.9%

         \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      5. lower--.f64 34.9%

         \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 34.9%

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

      9. lift-pow.f64 N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      10. unpow2 N/A

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      11. lower-*.f64 34.9%

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 3: 38.8% accurate, 1.7× speedup

Math

\[\begin{array}{l} \mathbf{if}\;x \leq 0.92:\\ \;\;\;\;\left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - x\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x}\\ \end{array} \]

FPCore

(FPCore (x)
  :precision binary64
  (if (<= x 0.92)
  (*
   (fmod (- (* (- (* 0.5 x) -1.0) x) -1.0) (sqrt (cos x)))
   (- 1.0 x))
  (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) (exp (- x)))))

C

double code(double x) {
	double tmp;
	if (x <= 0.92) {
		tmp = fmod(((((0.5 * x) - -1.0) * x) - -1.0), sqrt(cos(x))) * (1.0 - x);
	} else {
		tmp = fmod(1.0, (((x * x) * -0.25) - -1.0)) * exp(-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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8) :: tmp
    if (x <= 0.92d0) then
        tmp = mod(((((0.5d0 * x) - (-1.0d0)) * x) - (-1.0d0)), sqrt(cos(x))) * (1.0d0 - x)
    else
        tmp = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * exp(-x)
    end if
    code = tmp
end function

Python

def code(x):
	tmp = 0
	if x <= 0.92:
		tmp = math.fmod(((((0.5 * x) - -1.0) * x) - -1.0), math.sqrt(math.cos(x))) * (1.0 - x)
	else:
		tmp = math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * math.exp(-x)
	return tmp

Julia

function code(x)
	tmp = 0.0
	if (x <= 0.92)
		tmp = Float64(rem(Float64(Float64(Float64(Float64(0.5 * x) - -1.0) * x) - -1.0), sqrt(cos(x))) * Float64(1.0 - x));
	else
		tmp = Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * exp(Float64(-x)));
	end
	return tmp
end

Wolfram

code[x_] := If[LessEqual[x, 0.92], N[(N[With[{TMP1 = N[(N[(N[(N[(0.5 * x), $MachinePrecision] - -1.0), $MachinePrecision] * x), $MachinePrecision] - -1.0), $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[(1.0 - x), $MachinePrecision]), $MachinePrecision], N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if x < 0.92000000000000004

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{\left(1 + x \cdot \left(1 + \frac{1}{2} \cdot x\right)\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + \color{blue}{x \cdot \left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \color{blue}{\left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      3. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \left(1 + \color{blue}{\frac{1}{2} \cdot x}\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

      4. lower-*.f64 22.8%

         \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot \color{blue}{x}\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   4. Applied rewrites 22.8%

      \[\leadsto \left(\color{blue}{\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x \cdot \left(1 + \frac{1}{2} \cdot x\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

      2. lower-*.f64 8.2%

         \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

   7. Applied rewrites 8.2%

      \[\leadsto \left(\left(1 + x \cdot \left(1 + 0.5 \cdot x\right)\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(\left(1 + \color{blue}{x \cdot \left(1 + \frac{1}{2} \cdot x\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      2. +-commutative N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) + \color{blue}{1}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      3. add-flip N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      4. metadata-eval N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      5. lower--.f64 8.2%

         \[\leadsto \left(\left(x \cdot \left(1 + 0.5 \cdot x\right) - \color{blue}{-1}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      6. lift-*.f64 N/A

         \[\leadsto \left(\left(x \cdot \left(1 + \frac{1}{2} \cdot x\right) - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      7. *-commutative N/A

         \[\leadsto \left(\left(\left(1 + \frac{1}{2} \cdot x\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      8. lower-*.f64 8.2%

         \[\leadsto \left(\left(\left(1 + 0.5 \cdot x\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      9. lift-+.f64 N/A

         \[\leadsto \left(\left(\left(1 + \frac{1}{2} \cdot x\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      10. +-commutative N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x + 1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      11. add-flip N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - \left(\mathsf{neg}\left(1\right)\right)\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      12. metadata-eval N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      13. lower--.f64 8.2%

          \[\leadsto \left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot x\right) \]

      14. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \mathsf{Rewrite=>}\left(lift-+.f64, \left(1 + -1 \cdot x\right)\right) \]

      15. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \mathsf{Rewrite=>}\left(lift-*.f64, \left(-1 \cdot x\right)\right)\right) \]

      16. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \mathsf{Rewrite=>}\left(mul-1-neg, \left(\mathsf{neg}\left(x\right)\right)\right)\right) \]

      17. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \mathsf{Rewrite<=}\left(sub-flip, \left(1 - x\right)\right) \]

      18. lower--.f64 N/A

          \[\leadsto \left(\left(\left(\frac{1}{2} \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \mathsf{Rewrite<=}\left(lift--.f64, \left(1 - x\right)\right) \]

   9. Applied rewrites 8.2%

      \[\leadsto \color{blue}{\left(\left(\left(0.5 \cdot x - -1\right) \cdot x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - x\right)} \]

   if 0.92000000000000004 < x

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

   4. Applied rewrites 34.9%

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 34.9%

         \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      5. lower--.f64 34.9%

         \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 34.9%

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

      9. lift-pow.f64 N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      10. unpow2 N/A

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      11. lower-*.f64 34.9%

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 4: 38.5% accurate, 0.8× speedup

Math

\[e^{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right) \cdot -1} \]

FPCore

(FPCore (x)
  :precision binary64
  (exp (* (log (/ (exp x) (fmod (- x -1.0) (sqrt (cos x))))) -1.0)))

C

double code(double x) {
	return exp((log((exp(x) / fmod((x - -1.0), sqrt(cos(x))))) * -1.0));
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

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

real(8) function code(x)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = exp((log((exp(x) / mod((x - (-1.0d0)), sqrt(cos(x))))) * (-1.0d0)))
end function

Python

def code(x):
	return math.exp((math.log((math.exp(x) / math.fmod((x - -1.0), math.sqrt(math.cos(x))))) * -1.0))

Julia

function code(x)
	return exp(Float64(log(Float64(exp(x) / rem(Float64(x - -1.0), sqrt(cos(x))))) * -1.0))
end

Wolfram

code[x_] := N[Exp[N[(N[Log[N[(N[Exp[x], $MachinePrecision] / N[With[{TMP1 = N[(x - -1.0), $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * -1.0), $MachinePrecision]], $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

   1. lower-+.f64 38.5%

      \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

4. Applied rewrites 38.5%

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
5. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x}} \]

   2. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{e^{-x}} \]

   3. lift-neg.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{\color{blue}{\mathsf{neg}\left(x\right)}} \]

   4. exp-neg N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\frac{1}{e^{x}}} \]

   5. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \frac{1}{\color{blue}{e^{x}}} \]

   6. mult-flip-rev N/A

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   7. lower-/.f64 38.5%

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   8. lift-+.f64 N/A

      \[\leadsto \frac{\left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   9. +-commutative N/A

      \[\leadsto \frac{\left(\left(x + \color{blue}{1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   10. add-flip N/A

       \[\leadsto \frac{\left(\left(x - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   11. metadata-eval N/A

       \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   12. lower--.f64 38.5%

       \[\leadsto \frac{\left(\left(x - \color{blue}{-1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

6. Applied rewrites 38.5%

   \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]
7. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   2. div-flip N/A

      \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

   3. lower-unsound-/.f64 N/A

      \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

   4. lower-unsound-/.f64 38.5%

      \[\leadsto \frac{1}{\color{blue}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

8. Applied rewrites 38.5%

   \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]
9. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{1}{\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}}} \]

   2. inv-pow N/A

      \[\leadsto \color{blue}{{\left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right)}^{-1}} \]

   3. pow-to-exp N/A

      \[\leadsto \color{blue}{e^{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right) \cdot -1}} \]

   4. lower-unsound-exp.f64 N/A

      \[\leadsto \color{blue}{e^{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right) \cdot -1}} \]

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

      \[\leadsto e^{\color{blue}{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right) \cdot -1}} \]

   6. lower-unsound-log.f64 38.5%

      \[\leadsto e^{\color{blue}{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right)} \cdot -1} \]

10. Applied rewrites 38.5%

    \[\leadsto \color{blue}{e^{\log \left(\frac{e^{x}}{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}\right) \cdot -1}} \]
11. Add Preprocessing

Alternative 5: 38.5% accurate, 0.6× speedup

Math

\[\begin{array}{l} t_0 := \sqrt{\cos x}\\ t_1 := e^{-x}\\ \mathbf{if}\;\left(\left(e^{x}\right) \bmod t\_0\right) \cdot t\_1 \leq 2:\\ \;\;\;\;\left(\left(1 + x\right) \bmod t\_0\right) \cdot \left(1 + x \cdot \left(0.5 \cdot x - 1\right)\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot t\_1\\ \end{array} \]

FPCore

(FPCore (x)
  :precision binary64
  (let* ((t_0 (sqrt (cos x))) (t_1 (exp (- x))))
  (if (<= (* (fmod (exp x) t_0) t_1) 2.0)
    (* (fmod (+ 1.0 x) t_0) (+ 1.0 (* x (- (* 0.5 x) 1.0))))
    (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) t_1))))

C

double code(double x) {
	double t_0 = sqrt(cos(x));
	double t_1 = exp(-x);
	double tmp;
	if ((fmod(exp(x), t_0) * t_1) <= 2.0) {
		tmp = fmod((1.0 + x), t_0) * (1.0 + (x * ((0.5 * x) - 1.0)));
	} else {
		tmp = fmod(1.0, (((x * x) * -0.25) - -1.0)) * t_1;
	}
	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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = sqrt(cos(x))
    t_1 = exp(-x)
    if ((mod(exp(x), t_0) * t_1) <= 2.0d0) then
        tmp = mod((1.0d0 + x), t_0) * (1.0d0 + (x * ((0.5d0 * x) - 1.0d0)))
    else
        tmp = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * t_1
    end if
    code = tmp
end function

Python

def code(x):
	t_0 = math.sqrt(math.cos(x))
	t_1 = math.exp(-x)
	tmp = 0
	if (math.fmod(math.exp(x), t_0) * t_1) <= 2.0:
		tmp = math.fmod((1.0 + x), t_0) * (1.0 + (x * ((0.5 * x) - 1.0)))
	else:
		tmp = math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * t_1
	return tmp

Julia

function code(x)
	t_0 = sqrt(cos(x))
	t_1 = exp(Float64(-x))
	tmp = 0.0
	if (Float64(rem(exp(x), t_0) * t_1) <= 2.0)
		tmp = Float64(rem(Float64(1.0 + x), t_0) * Float64(1.0 + Float64(x * Float64(Float64(0.5 * x) - 1.0))));
	else
		tmp = Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * t_1);
	end
	return tmp
end

Wolfram

code[x_] := Block[{t$95$0 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[Exp[(-x)], $MachinePrecision]}, If[LessEqual[N[(N[With[{TMP1 = N[Exp[x], $MachinePrecision], TMP2 = t$95$0}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$1), $MachinePrecision], 2.0], N[(N[With[{TMP1 = N[(1.0 + x), $MachinePrecision], TMP2 = t$95$0}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[(1.0 + N[(x * N[(N[(0.5 * x), $MachinePrecision] - 1.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$1), $MachinePrecision]]]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x))) < 2

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

      1. lower-+.f64 38.5%

         \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   4. Applied rewrites 38.5%

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

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

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{x \cdot \left(\frac{1}{2} \cdot x - 1\right)}\right) \]

      2. lower-*.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + x \cdot \color{blue}{\left(\frac{1}{2} \cdot x - 1\right)}\right) \]

      3. lower--.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + x \cdot \left(\frac{1}{2} \cdot x - \color{blue}{1}\right)\right) \]

      4. lower-*.f64 8.1%

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + x \cdot \left(0.5 \cdot x - 1\right)\right) \]

   7. Applied rewrites 8.1%

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + x \cdot \left(0.5 \cdot x - 1\right)\right)} \]

   if 2 < (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x)))

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

   4. Applied rewrites 34.9%

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 34.9%

         \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      5. lower--.f64 34.9%

         \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 34.9%

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

      9. lift-pow.f64 N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      10. unpow2 N/A

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      11. lower-*.f64 34.9%

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 38.5% accurate, 1.3× speedup

Math

\[\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

FPCore

(FPCore (x)
  :precision binary64
  (/ (fmod (- x -1.0) (sqrt (cos x))) (exp x)))

C

double code(double x) {
	return fmod((x - -1.0), sqrt(cos(x))) / exp(x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod((x - (-1.0d0)), sqrt(cos(x))) / exp(x)
end function

Python

def code(x):
	return math.fmod((x - -1.0), math.sqrt(math.cos(x))) / math.exp(x)

Julia

function code(x)
	return Float64(rem(Float64(x - -1.0), sqrt(cos(x))) / exp(x))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = N[(x - -1.0), $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] / N[Exp[x], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

   1. lower-+.f64 38.5%

      \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

4. Applied rewrites 38.5%

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
5. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x}} \]

   2. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{e^{-x}} \]

   3. lift-neg.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{\color{blue}{\mathsf{neg}\left(x\right)}} \]

   4. exp-neg N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\frac{1}{e^{x}}} \]

   5. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \frac{1}{\color{blue}{e^{x}}} \]

   6. mult-flip-rev N/A

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   7. lower-/.f64 38.5%

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   8. lift-+.f64 N/A

      \[\leadsto \frac{\left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   9. +-commutative N/A

      \[\leadsto \frac{\left(\left(x + \color{blue}{1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   10. add-flip N/A

       \[\leadsto \frac{\left(\left(x - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   11. metadata-eval N/A

       \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   12. lower--.f64 38.5%

       \[\leadsto \frac{\left(\left(x - \color{blue}{-1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

6. Applied rewrites 38.5%

   \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]
7. Add Preprocessing

Alternative 7: 38.5% accurate, 1.3× speedup

Math

\[\frac{\left(\left(x - -1\right) \bmod \left(1 + -0.25 \cdot {x}^{2}\right)\right)}{e^{x}} \]

FPCore

(FPCore (x)
  :precision binary64
  (/ (fmod (- x -1.0) (+ 1.0 (* -0.25 (pow x 2.0)))) (exp x)))

C

double code(double x) {
	return fmod((x - -1.0), (1.0 + (-0.25 * pow(x, 2.0)))) / exp(x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod((x - (-1.0d0)), (1.0d0 + ((-0.25d0) * (x ** 2.0d0)))) / exp(x)
end function

Python

def code(x):
	return math.fmod((x - -1.0), (1.0 + (-0.25 * math.pow(x, 2.0)))) / math.exp(x)

Julia

function code(x)
	return Float64(rem(Float64(x - -1.0), Float64(1.0 + Float64(-0.25 * (x ^ 2.0)))) / exp(x))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = N[(x - -1.0), $MachinePrecision], TMP2 = N[(1.0 + N[(-0.25 * N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] / N[Exp[x], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

   1. lower-+.f64 38.5%

      \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

4. Applied rewrites 38.5%

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
5. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \color{blue}{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x}} \]

   2. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{e^{-x}} \]

   3. lift-neg.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{\color{blue}{\mathsf{neg}\left(x\right)}} \]

   4. exp-neg N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\frac{1}{e^{x}}} \]

   5. lift-exp.f64 N/A

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \frac{1}{\color{blue}{e^{x}}} \]

   6. mult-flip-rev N/A

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   7. lower-/.f64 38.5%

      \[\leadsto \color{blue}{\frac{\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

   8. lift-+.f64 N/A

      \[\leadsto \frac{\left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   9. +-commutative N/A

      \[\leadsto \frac{\left(\left(x + \color{blue}{1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   10. add-flip N/A

       \[\leadsto \frac{\left(\left(x - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   11. metadata-eval N/A

       \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

   12. lower--.f64 38.5%

       \[\leadsto \frac{\left(\left(x - \color{blue}{-1}\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}} \]

6. Applied rewrites 38.5%

   \[\leadsto \color{blue}{\frac{\left(\left(x - -1\right) \bmod \left(\sqrt{\cos x}\right)\right)}{e^{x}}} \]

7. Taylor expanded in x around 0

   \[\leadsto \frac{\left(\left(x - -1\right) \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right)}{e^{x}} \]
8. Step-by-step derivation

   1. lower-+.f64 N/A

      \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right)}{e^{x}} \]

   2. lower-*.f64 N/A

      \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right)}{e^{x}} \]

   3. lower-pow.f64 38.5%

      \[\leadsto \frac{\left(\left(x - -1\right) \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right)}{e^{x}} \]

9. Applied rewrites 38.5%

   \[\leadsto \frac{\left(\left(x - -1\right) \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right)}{e^{x}} \]
10. Add Preprocessing

Alternative 8: 38.5% accurate, 0.6× speedup

Math

\[\begin{array}{l} t_0 := \sqrt{\cos x}\\ t_1 := e^{-x}\\ \mathbf{if}\;\left(\left(e^{x}\right) \bmod t\_0\right) \cdot t\_1 \leq 2:\\ \;\;\;\;\left(\left(1 + x\right) \bmod t\_0\right) \cdot \left(1 + -1 \cdot x\right)\\ \mathbf{else}:\\ \;\;\;\;\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot t\_1\\ \end{array} \]

FPCore

(FPCore (x)
  :precision binary64
  (let* ((t_0 (sqrt (cos x))) (t_1 (exp (- x))))
  (if (<= (* (fmod (exp x) t_0) t_1) 2.0)
    (* (fmod (+ 1.0 x) t_0) (+ 1.0 (* -1.0 x)))
    (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) t_1))))

C

double code(double x) {
	double t_0 = sqrt(cos(x));
	double t_1 = exp(-x);
	double tmp;
	if ((fmod(exp(x), t_0) * t_1) <= 2.0) {
		tmp = fmod((1.0 + x), t_0) * (1.0 + (-1.0 * x));
	} else {
		tmp = fmod(1.0, (((x * x) * -0.25) - -1.0)) * t_1;
	}
	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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = sqrt(cos(x))
    t_1 = exp(-x)
    if ((mod(exp(x), t_0) * t_1) <= 2.0d0) then
        tmp = mod((1.0d0 + x), t_0) * (1.0d0 + ((-1.0d0) * x))
    else
        tmp = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * t_1
    end if
    code = tmp
end function

Python

def code(x):
	t_0 = math.sqrt(math.cos(x))
	t_1 = math.exp(-x)
	tmp = 0
	if (math.fmod(math.exp(x), t_0) * t_1) <= 2.0:
		tmp = math.fmod((1.0 + x), t_0) * (1.0 + (-1.0 * x))
	else:
		tmp = math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * t_1
	return tmp

Julia

function code(x)
	t_0 = sqrt(cos(x))
	t_1 = exp(Float64(-x))
	tmp = 0.0
	if (Float64(rem(exp(x), t_0) * t_1) <= 2.0)
		tmp = Float64(rem(Float64(1.0 + x), t_0) * Float64(1.0 + Float64(-1.0 * x)));
	else
		tmp = Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * t_1);
	end
	return tmp
end

Wolfram

code[x_] := Block[{t$95$0 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[Exp[(-x)], $MachinePrecision]}, If[LessEqual[N[(N[With[{TMP1 = N[Exp[x], $MachinePrecision], TMP2 = t$95$0}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$1), $MachinePrecision], 2.0], N[(N[With[{TMP1 = N[(1.0 + x), $MachinePrecision], TMP2 = t$95$0}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[(1.0 + N[(-1.0 * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * t$95$1), $MachinePrecision]]]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x))) < 2

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

      1. lower-+.f64 38.5%

         \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   4. Applied rewrites 38.5%

      \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

      2. lower-*.f64 8.2%

         \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

   7. Applied rewrites 8.2%

      \[\leadsto \left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]

   if 2 < (*.f64 (fmod.f64 (exp.f64 x) (sqrt.f64 (cos.f64 x))) (exp.f64 (neg.f64 x)))

   1. Initial program 9.3%

      \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   2. Taylor expanded in x around 0

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
   3. Step-by-step derivation

   4. Applied rewrites 34.9%

      \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

   5. Taylor expanded in x around 0

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   6. Step-by-step derivation

      1. lower-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. lower-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

      3. lower-pow.f64 34.9%

         \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

   7. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
   8. Step-by-step derivation

      1. lift-+.f64 N/A

         \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

      2. +-commutative N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

      3. add-flip N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

      4. metadata-eval N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      5. lower--.f64 34.9%

         \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

      6. lift-*.f64 N/A

         \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

      7. *-commutative N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      8. lower-*.f64 34.9%

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

      9. lift-pow.f64 N/A

         \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      10. unpow2 N/A

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

      11. lower-*.f64 34.9%

          \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. Applied rewrites 34.9%

      \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 9: 38.4% accurate, 1.3× speedup

Math

\[\left(\left(1 + x\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod (+ 1.0 x) (sqrt (cos x))) (exp (- x))))

C

double code(double x) {
	return fmod((1.0 + x), sqrt(cos(x))) * exp(-x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod((1.0d0 + x), sqrt(cos(x))) * exp(-x)
end function

Python

def code(x):
	return math.fmod((1.0 + x), math.sqrt(math.cos(x))) * math.exp(-x)

Julia

function code(x)
	return Float64(rem(Float64(1.0 + x), sqrt(cos(x))) * exp(Float64(-x)))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = N[(1.0 + x), $MachinePrecision], TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

   1. lower-+.f64 38.5%

      \[\leadsto \left(\left(1 + \color{blue}{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

4. Applied rewrites 38.5%

   \[\leadsto \left(\color{blue}{\left(1 + x\right)} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
5. Add Preprocessing

Alternative 10: 34.9% accurate, 1.9× speedup

Math

\[\left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod 1.0 (- (* (* x x) -0.25) -1.0)) (exp (- x))))

C

double code(double x) {
	return fmod(1.0, (((x * x) * -0.25) - -1.0)) * exp(-x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod(1.0d0, (((x * x) * (-0.25d0)) - (-1.0d0))) * exp(-x)
end function

Python

def code(x):
	return math.fmod(1.0, (((x * x) * -0.25) - -1.0)) * math.exp(-x)

Julia

function code(x)
	return Float64(rem(1.0, Float64(Float64(Float64(x * x) * -0.25) - -1.0)) * exp(Float64(-x)))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = 1.0, TMP2 = N[(N[(N[(x * x), $MachinePrecision] * -0.25), $MachinePrecision] - -1.0), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

4. Applied rewrites 34.9%

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

5. Taylor expanded in x around 0

   \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
6. Step-by-step derivation

   1. lower-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

   2. lower-*.f64 N/A

      \[\leadsto \left(1 \bmod \left(1 + \frac{-1}{4} \cdot \color{blue}{{x}^{2}}\right)\right) \cdot e^{-x} \]

   3. lower-pow.f64 34.9%

      \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot e^{-x} \]

7. Applied rewrites 34.9%

   \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot e^{-x} \]
8. Step-by-step derivation

   1. lift-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(1 + \color{blue}{\frac{-1}{4} \cdot {x}^{2}}\right)\right) \cdot e^{-x} \]

   2. +-commutative N/A

      \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} + \color{blue}{1}\right)\right) \cdot e^{-x} \]

   3. add-flip N/A

      \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right) \cdot e^{-x} \]

   4. metadata-eval N/A

      \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

   5. lower--.f64 34.9%

      \[\leadsto \left(1 \bmod \left(-0.25 \cdot {x}^{2} - \color{blue}{-1}\right)\right) \cdot e^{-x} \]

   6. lift-*.f64 N/A

      \[\leadsto \left(1 \bmod \left(\frac{-1}{4} \cdot {x}^{2} - -1\right)\right) \cdot e^{-x} \]

   7. *-commutative N/A

      \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

   8. lower-*.f64 34.9%

      \[\leadsto \left(1 \bmod \left({x}^{2} \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

   9. lift-pow.f64 N/A

      \[\leadsto \left(1 \bmod \left({x}^{2} \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

   10. unpow2 N/A

       \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot \frac{-1}{4} - -1\right)\right) \cdot e^{-x} \]

   11. lower-*.f64 34.9%

       \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - -1\right)\right) \cdot e^{-x} \]

9. Applied rewrites 34.9%

   \[\leadsto \left(1 \bmod \left(\left(x \cdot x\right) \cdot -0.25 - \color{blue}{-1}\right)\right) \cdot e^{-x} \]
10. Add Preprocessing

Alternative 11: 4.7% accurate, 1.9× speedup

Math

\[\left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - x\right) \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod 1.0 (sqrt (cos x))) (- 1.0 x)))

C

double code(double x) {
	return fmod(1.0, sqrt(cos(x))) * (1.0 - x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod(1.0d0, sqrt(cos(x))) * (1.0d0 - x)
end function

Python

def code(x):
	return math.fmod(1.0, math.sqrt(math.cos(x))) * (1.0 - x)

Julia

function code(x)
	return Float64(rem(1.0, sqrt(cos(x))) * Float64(1.0 - x))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = 1.0, TMP2 = N[Sqrt[N[Cos[x], $MachinePrecision]], $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

4. Applied rewrites 34.9%

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

5. Taylor expanded in x around 0

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
6. Step-by-step derivation

   1. lower-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

   2. lower-*.f64 4.7%

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

7. Applied rewrites 4.7%

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
8. Step-by-step derivation

   1. lift-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

   2. lift-*.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

   3. mul-1-neg N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \left(\mathsf{neg}\left(x\right)\right)\right) \]

   4. sub-flip-reverse N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]

   5. lower--.f64 4.7%

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]

9. Applied rewrites 4.7%

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]
10. Add Preprocessing

Alternative 12: 4.7% accurate, 1.9× speedup

Math

\[\left(1 \bmod \left(1 + -0.25 \cdot {x}^{2}\right)\right) \cdot \left(1 - x\right) \]

FPCore

(FPCore (x)
  :precision binary64
  (* (fmod 1.0 (+ 1.0 (* -0.25 (pow x 2.0)))) (- 1.0 x)))

C

double code(double x) {
	return fmod(1.0, (1.0 + (-0.25 * pow(x, 2.0)))) * (1.0 - x);
}

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)
use fmin_fmax_functions
    real(8), intent (in) :: x
    code = mod(1.0d0, (1.0d0 + ((-0.25d0) * (x ** 2.0d0)))) * (1.0d0 - x)
end function

Python

def code(x):
	return math.fmod(1.0, (1.0 + (-0.25 * math.pow(x, 2.0)))) * (1.0 - x)

Julia

function code(x)
	return Float64(rem(1.0, Float64(1.0 + Float64(-0.25 * (x ^ 2.0)))) * Float64(1.0 - x))
end

Wolfram

code[x_] := N[(N[With[{TMP1 = 1.0, TMP2 = N[(1.0 + N[(-0.25 * N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, Mod[Abs[TMP1], Abs[TMP2]] * Sign[TMP1]], $MachinePrecision] * N[(1.0 - x), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 9.3%

   \[\left(\left(e^{x}\right) \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

2. Taylor expanded in x around 0

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]
3. Step-by-step derivation

4. Applied rewrites 34.9%

   \[\leadsto \left(\color{blue}{1} \bmod \left(\sqrt{\cos x}\right)\right) \cdot e^{-x} \]

5. Taylor expanded in x around 0

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
6. Step-by-step derivation

   1. lower-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

   2. lower-*.f64 4.7%

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

7. Applied rewrites 4.7%

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \color{blue}{\left(1 + -1 \cdot x\right)} \]
8. Step-by-step derivation

   1. lift-+.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \color{blue}{-1 \cdot x}\right) \]

   2. lift-*.f64 N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + -1 \cdot \color{blue}{x}\right) \]

   3. mul-1-neg N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 + \left(\mathsf{neg}\left(x\right)\right)\right) \]

   4. sub-flip-reverse N/A

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]

   5. lower--.f64 4.7%

      \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]

9. Applied rewrites 4.7%

   \[\leadsto \left(1 \bmod \left(\sqrt{\cos x}\right)\right) \cdot \left(1 - \color{blue}{x}\right) \]

10. Taylor expanded in x around 0

    \[\leadsto \left(1 \bmod \color{blue}{\left(1 + \frac{-1}{4} \cdot {x}^{2}\right)}\right) \cdot \left(1 - x\right) \]
11. Step-by-step derivation

    1. lower-+.f64 N/A

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

    2. lower-*.f64 N/A

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

    3. lower-pow.f64 4.7%

       \[\leadsto \left(1 \bmod \left(1 + -0.25 \cdot {x}^{\color{blue}{2}}\right)\right) \cdot \left(1 - x\right) \]

12. Applied rewrites 4.7%

    \[\leadsto \left(1 \bmod \color{blue}{\left(1 + -0.25 \cdot {x}^{2}\right)}\right) \cdot \left(1 - x\right) \]
13. Add Preprocessing

Reproduce

herbie shell --seed 2025258 
(FPCore (x)
  :name "expfmod (used to be hard to sample)"
  :precision binary64
  (* (fmod (exp x) (sqrt (cos x))) (exp (- x))))