mixedcos

Percentage Accurate: 67.1% → 99.4%

Time: 3.7s

Alternatives: 13

Speedup: 4.2×

• 31.5% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \end{array} \]

FPCore

(FPCore (x c s)
 :precision binary64
 (/ (cos (* 2.0 x)) (* (pow c 2.0) (* (* x (pow s 2.0)) x))))

C

double code(double x, double c, double s) {
	return cos((2.0 * x)) / (pow(c, 2.0) * ((x * pow(s, 2.0)) * 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, c, s)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: c
    real(8), intent (in) :: s
    code = cos((2.0d0 * x)) / ((c ** 2.0d0) * ((x * (s ** 2.0d0)) * x))
end function

Java

public static double code(double x, double c, double s) {
	return Math.cos((2.0 * x)) / (Math.pow(c, 2.0) * ((x * Math.pow(s, 2.0)) * x));
}

Python

def code(x, c, s):
	return math.cos((2.0 * x)) / (math.pow(c, 2.0) * ((x * math.pow(s, 2.0)) * x))

Julia

function code(x, c, s)
	return Float64(cos(Float64(2.0 * x)) / Float64((c ^ 2.0) * Float64(Float64(x * (s ^ 2.0)) * x)))
end

MATLAB

function tmp = code(x, c, s)
	tmp = cos((2.0 * x)) / ((c ^ 2.0) * ((x * (s ^ 2.0)) * x));
end

Wolfram

code[x_, c_, s_] := N[(N[Cos[N[(2.0 * x), $MachinePrecision]], $MachinePrecision] / N[(N[Power[c, 2.0], $MachinePrecision] * N[(N[(x * N[Power[s, 2.0], $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Initial Program: 67.1% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \end{array} \]

FPCore

(FPCore (x c s)
 :precision binary64
 (/ (cos (* 2.0 x)) (* (pow c 2.0) (* (* x (pow s 2.0)) x))))

C

double code(double x, double c, double s) {
	return cos((2.0 * x)) / (pow(c, 2.0) * ((x * pow(s, 2.0)) * 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, c, s)
use fmin_fmax_functions
    real(8), intent (in) :: x
    real(8), intent (in) :: c
    real(8), intent (in) :: s
    code = cos((2.0d0 * x)) / ((c ** 2.0d0) * ((x * (s ** 2.0d0)) * x))
end function

Java

public static double code(double x, double c, double s) {
	return Math.cos((2.0 * x)) / (Math.pow(c, 2.0) * ((x * Math.pow(s, 2.0)) * x));
}

Python

def code(x, c, s):
	return math.cos((2.0 * x)) / (math.pow(c, 2.0) * ((x * math.pow(s, 2.0)) * x))

Julia

function code(x, c, s)
	return Float64(cos(Float64(2.0 * x)) / Float64((c ^ 2.0) * Float64(Float64(x * (s ^ 2.0)) * x)))
end

MATLAB

function tmp = code(x, c, s)
	tmp = cos((2.0 * x)) / ((c ^ 2.0) * ((x * (s ^ 2.0)) * x));
end

Wolfram

code[x_, c_, s_] := N[(N[Cos[N[(2.0 * x), $MachinePrecision]], $MachinePrecision] / N[(N[Power[c, 2.0], $MachinePrecision] * N[(N[(x * N[Power[s, 2.0], $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Alternative 1: 99.4% accurate, 1.4× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := s\_m \cdot \left(x\_m \cdot c\_m\right)\\ t_1 := c\_m \cdot \left(s\_m \cdot x\_m\right)\\ \mathbf{if}\;x\_m \leq 2 \cdot 10^{-11}:\\ \;\;\;\;\frac{\frac{1}{t\_1}}{t\_1}\\ \mathbf{else}:\\ \;\;\;\;\frac{\cos \left(x\_m + x\_m\right)}{t\_0 \cdot t\_0}\\ \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* s_m (* x_m c_m))) (t_1 (* c_m (* s_m x_m))))
   (if (<= x_m 2e-11) (/ (/ 1.0 t_1) t_1) (/ (cos (+ x_m x_m)) (* t_0 t_0)))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = s_m * (x_m * c_m);
	double t_1 = c_m * (s_m * x_m);
	double tmp;
	if (x_m <= 2e-11) {
		tmp = (1.0 / t_1) / t_1;
	} else {
		tmp = cos((x_m + x_m)) / (t_0 * t_0);
	}
	return tmp;
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    real(8) :: t_1
    real(8) :: tmp
    t_0 = s_m * (x_m * c_m)
    t_1 = c_m * (s_m * x_m)
    if (x_m <= 2d-11) then
        tmp = (1.0d0 / t_1) / t_1
    else
        tmp = cos((x_m + x_m)) / (t_0 * t_0)
    end if
    code = tmp
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = s_m * (x_m * c_m);
	double t_1 = c_m * (s_m * x_m);
	double tmp;
	if (x_m <= 2e-11) {
		tmp = (1.0 / t_1) / t_1;
	} else {
		tmp = Math.cos((x_m + x_m)) / (t_0 * t_0);
	}
	return tmp;
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = s_m * (x_m * c_m)
	t_1 = c_m * (s_m * x_m)
	tmp = 0
	if x_m <= 2e-11:
		tmp = (1.0 / t_1) / t_1
	else:
		tmp = math.cos((x_m + x_m)) / (t_0 * t_0)
	return tmp

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(s_m * Float64(x_m * c_m))
	t_1 = Float64(c_m * Float64(s_m * x_m))
	tmp = 0.0
	if (x_m <= 2e-11)
		tmp = Float64(Float64(1.0 / t_1) / t_1);
	else
		tmp = Float64(cos(Float64(x_m + x_m)) / Float64(t_0 * t_0));
	end
	return tmp
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp_2 = code(x_m, c_m, s_m)
	t_0 = s_m * (x_m * c_m);
	t_1 = c_m * (s_m * x_m);
	tmp = 0.0;
	if (x_m <= 2e-11)
		tmp = (1.0 / t_1) / t_1;
	else
		tmp = cos((x_m + x_m)) / (t_0 * t_0);
	end
	tmp_2 = tmp;
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(s$95$m * N[(x$95$m * c$95$m), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[x$95$m, 2e-11], N[(N[(1.0 / t$95$1), $MachinePrecision] / t$95$1), $MachinePrecision], N[(N[Cos[N[(x$95$m + x$95$m), $MachinePrecision]], $MachinePrecision] / N[(t$95$0 * t$95$0), $MachinePrecision]), $MachinePrecision]]]]

Derivation

1. Split input into 2 regimes

2. if x < 1.99999999999999988e-11

   1. Initial program 69.7%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   2. Taylor expanded in x around 0

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

      1. lower-/.f64 N/A

         \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

      2. *-commutative N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

      3. unpow2 N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

      4. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      6. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

      7. unpow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

      8. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      9. *-commutative N/A

         \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      10. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      11. *-commutative N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      13. unpow2 N/A

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      14. lower-*.f64 70.6

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. Applied rewrites 70.6%

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

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      6. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      7. associate-*l* N/A

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

      8. pow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

      9. associate-*l* N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot \left(\color{blue}{c} \cdot c\right)} \]

      10. pow2 N/A

          \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot c\right)} \]

      11. pow-prod-down N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(\color{blue}{c} \cdot c\right)} \]

      12. lift-*.f64 N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(c \cdot c\right)} \]

      13. pow2 N/A

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

      14. swap-sqr N/A

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

      15. lift-*.f64 N/A

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

      16. lift-*.f64 N/A

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

   6. Applied rewrites 99.6%

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

   if 1.99999999999999988e-11 < x

   1. Initial program 64.6%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
   2. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      2. lift-pow.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      3. lift-*.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

      5. lift-pow.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

      6. *-commutative N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right)} \]

      7. associate-*r* N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left({s}^{2} \cdot \left(x \cdot x\right)\right)}} \]

      8. unpow2 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left({s}^{2} \cdot \color{blue}{{x}^{2}}\right)} \]

      9. *-commutative N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left({s}^{2} \cdot {x}^{2}\right) \cdot {c}^{2}}} \]

      10. pow-prod-down N/A

          \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(s \cdot x\right)}^{2}} \cdot {c}^{2}} \]

      11. pow-prod-down N/A

          \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

      12. lower-pow.f64 N/A

          \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

      13. lower-*.f64 N/A

          \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}}^{2}} \]

      14. lower-*.f64 94.5

          \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\left(\color{blue}{\left(s \cdot x\right)} \cdot c\right)}^{2}} \]

   3. Applied rewrites 94.5%

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]
   4. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\cos \color{blue}{\left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

      3. lift-cos.f64 N/A

         \[\leadsto \frac{\color{blue}{\cos \left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

      4. lift-pow.f64 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

      5. unpow2 N/A

         \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]

      6. associate-/r* N/A

         \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

      7. lower-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

      8. lower-/.f64 N/A

         \[\leadsto \frac{\color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

      9. lift-cos.f64 N/A

         \[\leadsto \frac{\frac{\color{blue}{\cos \left(2 \cdot x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

      10. count-2-rev N/A

          \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

      11. lower-+.f64 94.7

          \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

      12. lift-*.f64 N/A

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

      13. *-commutative N/A

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

      14. lower-*.f64 94.7

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

      15. lift-*.f64 N/A

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{\left(s \cdot x\right) \cdot c}} \]

      16. *-commutative N/A

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

      17. lower-*.f64 94.7

          \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   5. Applied rewrites 94.7%

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

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)}} \]

      2. lift-/.f64 N/A

         \[\leadsto \frac{\color{blue}{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

      3. lift-+.f64 N/A

         \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

      4. lift-cos.f64 N/A

         \[\leadsto \frac{\frac{\color{blue}{\cos \left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

      6. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \color{blue}{\left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

      7. count-2-rev N/A

         \[\leadsto \frac{\frac{\cos \color{blue}{\left(2 \cdot x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

      8. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

      9. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \color{blue}{\left(s \cdot x\right)}} \]

      10. associate-/l/ N/A

          \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

      11. lower-/.f64 N/A

          \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

      12. count-2-rev N/A

          \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      13. lift-cos.f64 N/A

          \[\leadsto \frac{\color{blue}{\cos \left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      14. lift-+.f64 N/A

          \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      15. lower-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

      16. lift-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(c \cdot \color{blue}{\left(s \cdot x\right)}\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      17. *-commutative N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      18. lower-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

      19. lift-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(c \cdot \color{blue}{\left(s \cdot x\right)}\right)} \]

      20. *-commutative N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

      21. lower-*.f64 94.5

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

   7. Applied rewrites 94.5%

      \[\leadsto \color{blue}{\frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]
   8. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \frac{\cos \left(x + x\right)}{\left(\color{blue}{\left(s \cdot x\right)} \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]

      3. associate-*l* N/A

         \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot \left(x \cdot c\right)\right)} \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]

      4. lower-*.f64 N/A

         \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot \left(x \cdot c\right)\right)} \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]

      5. lower-*.f64 94.6

         \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \color{blue}{\left(x \cdot c\right)}\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]

   9. Applied rewrites 94.6%

      \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot \left(x \cdot c\right)\right)} \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]
   10. Step-by-step derivation

       1. lift-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \left(\color{blue}{\left(s \cdot x\right)} \cdot c\right)} \]

       2. lift-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

       3. associate-*l* N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \color{blue}{\left(s \cdot \left(x \cdot c\right)\right)}} \]

       4. lower-*.f64 N/A

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \color{blue}{\left(s \cdot \left(x \cdot c\right)\right)}} \]

       5. lower-*.f64 99.1

          \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \left(s \cdot \color{blue}{\left(x \cdot c\right)}\right)} \]

   11. Applied rewrites 99.1%

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(s \cdot \left(x \cdot c\right)\right) \cdot \color{blue}{\left(s \cdot \left(x \cdot c\right)\right)}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 2: 97.1% accurate, 1.5× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := c\_m \cdot \left(s\_m \cdot x\_m\right)\\ \frac{\frac{\cos \left(x\_m + x\_m\right)}{t\_0}}{t\_0} \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* c_m (* s_m x_m)))) (/ (/ (cos (+ x_m x_m)) t_0) t_0)))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	return (cos((x_m + x_m)) / t_0) / t_0;
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    t_0 = c_m * (s_m * x_m)
    code = (cos((x_m + x_m)) / t_0) / t_0
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	return (Math.cos((x_m + x_m)) / t_0) / t_0;
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = c_m * (s_m * x_m)
	return (math.cos((x_m + x_m)) / t_0) / t_0

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(c_m * Float64(s_m * x_m))
	return Float64(Float64(cos(Float64(x_m + x_m)) / t_0) / t_0)
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	t_0 = c_m * (s_m * x_m);
	tmp = (cos((x_m + x_m)) / t_0) / t_0;
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]}, N[(N[(N[Cos[N[(x$95$m + x$95$m), $MachinePrecision]], $MachinePrecision] / t$95$0), $MachinePrecision] / t$95$0), $MachinePrecision]]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
2. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   2. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

   5. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

   6. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right)} \]

   7. associate-*r* N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left({s}^{2} \cdot \left(x \cdot x\right)\right)}} \]

   8. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left({s}^{2} \cdot \color{blue}{{x}^{2}}\right)} \]

   9. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left({s}^{2} \cdot {x}^{2}\right) \cdot {c}^{2}}} \]

   10. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(s \cdot x\right)}^{2}} \cdot {c}^{2}} \]

   11. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   12. lower-pow.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}}^{2}} \]

   14. lower-*.f64 96.9

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\left(\color{blue}{\left(s \cdot x\right)} \cdot c\right)}^{2}} \]

3. Applied rewrites 96.9%

   \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]
4. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{\cos \color{blue}{\left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   3. lift-cos.f64 N/A

      \[\leadsto \frac{\color{blue}{\cos \left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   4. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   5. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]

   6. associate-/r* N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   7. lower-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   8. lower-/.f64 N/A

      \[\leadsto \frac{\color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   9. lift-cos.f64 N/A

      \[\leadsto \frac{\frac{\color{blue}{\cos \left(2 \cdot x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   10. count-2-rev N/A

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   11. lower-+.f64 97.1

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   13. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   14. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   15. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{\left(s \cdot x\right) \cdot c}} \]

   16. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   17. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

5. Applied rewrites 97.1%

   \[\leadsto \color{blue}{\frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)}} \]
6. Add Preprocessing

Alternative 3: 96.9% accurate, 1.5× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := \left(s\_m \cdot x\_m\right) \cdot c\_m\\ \frac{\cos \left(x\_m + x\_m\right)}{t\_0 \cdot t\_0} \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* (* s_m x_m) c_m))) (/ (cos (+ x_m x_m)) (* t_0 t_0))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = (s_m * x_m) * c_m;
	return cos((x_m + x_m)) / (t_0 * t_0);
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    t_0 = (s_m * x_m) * c_m
    code = cos((x_m + x_m)) / (t_0 * t_0)
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = (s_m * x_m) * c_m;
	return Math.cos((x_m + x_m)) / (t_0 * t_0);
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = (s_m * x_m) * c_m
	return math.cos((x_m + x_m)) / (t_0 * t_0)

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(Float64(s_m * x_m) * c_m)
	return Float64(cos(Float64(x_m + x_m)) / Float64(t_0 * t_0))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	t_0 = (s_m * x_m) * c_m;
	tmp = cos((x_m + x_m)) / (t_0 * t_0);
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(N[(s$95$m * x$95$m), $MachinePrecision] * c$95$m), $MachinePrecision]}, N[(N[Cos[N[(x$95$m + x$95$m), $MachinePrecision]], $MachinePrecision] / N[(t$95$0 * t$95$0), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
2. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   2. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

   5. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

   6. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right)} \]

   7. associate-*r* N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left({s}^{2} \cdot \left(x \cdot x\right)\right)}} \]

   8. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left({s}^{2} \cdot \color{blue}{{x}^{2}}\right)} \]

   9. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left({s}^{2} \cdot {x}^{2}\right) \cdot {c}^{2}}} \]

   10. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(s \cdot x\right)}^{2}} \cdot {c}^{2}} \]

   11. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   12. lower-pow.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}}^{2}} \]

   14. lower-*.f64 96.9

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\left(\color{blue}{\left(s \cdot x\right)} \cdot c\right)}^{2}} \]

3. Applied rewrites 96.9%

   \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]
4. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{\cos \color{blue}{\left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   3. lift-cos.f64 N/A

      \[\leadsto \frac{\color{blue}{\cos \left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   4. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   5. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]

   6. associate-/r* N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   7. lower-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   8. lower-/.f64 N/A

      \[\leadsto \frac{\color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   9. lift-cos.f64 N/A

      \[\leadsto \frac{\frac{\color{blue}{\cos \left(2 \cdot x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   10. count-2-rev N/A

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   11. lower-+.f64 97.1

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   13. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   14. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   15. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{\left(s \cdot x\right) \cdot c}} \]

   16. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   17. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

5. Applied rewrites 97.1%

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

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)}} \]

   2. lift-/.f64 N/A

      \[\leadsto \frac{\color{blue}{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   3. lift-+.f64 N/A

      \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   4. lift-cos.f64 N/A

      \[\leadsto \frac{\frac{\color{blue}{\cos \left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   6. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \color{blue}{\left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   7. count-2-rev N/A

      \[\leadsto \frac{\frac{\cos \color{blue}{\left(2 \cdot x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   8. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   9. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \color{blue}{\left(s \cdot x\right)}} \]

   10. associate-/l/ N/A

       \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   11. lower-/.f64 N/A

       \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   12. count-2-rev N/A

       \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   13. lift-cos.f64 N/A

       \[\leadsto \frac{\color{blue}{\cos \left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   14. lift-+.f64 N/A

       \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   15. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   16. lift-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(c \cdot \color{blue}{\left(s \cdot x\right)}\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   17. *-commutative N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   18. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   19. lift-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(c \cdot \color{blue}{\left(s \cdot x\right)}\right)} \]

   20. *-commutative N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

   21. lower-*.f64 96.9

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

7. Applied rewrites 96.9%

   \[\leadsto \color{blue}{\frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]
8. Add Preprocessing

Alternative 4: 83.6% accurate, 0.7× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := c\_m \cdot \left(s\_m \cdot x\_m\right)\\ \mathbf{if}\;\frac{\cos \left(2 \cdot x\_m\right)}{{c\_m}^{2} \cdot \left(\left(x\_m \cdot {s\_m}^{2}\right) \cdot x\_m\right)} \leq -2 \cdot 10^{-180}:\\ \;\;\;\;\frac{\frac{\left(x\_m \cdot x\_m\right) \cdot -2}{\left(\left(\left(s\_m \cdot s\_m\right) \cdot x\_m\right) \cdot x\_m\right) \cdot c\_m}}{c\_m}\\ \mathbf{else}:\\ \;\;\;\;\frac{\frac{1}{t\_0}}{t\_0}\\ \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* c_m (* s_m x_m))))
   (if (<=
        (/ (cos (* 2.0 x_m)) (* (pow c_m 2.0) (* (* x_m (pow s_m 2.0)) x_m)))
        -2e-180)
     (/ (/ (* (* x_m x_m) -2.0) (* (* (* (* s_m s_m) x_m) x_m) c_m)) c_m)
     (/ (/ 1.0 t_0) t_0))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	double tmp;
	if ((cos((2.0 * x_m)) / (pow(c_m, 2.0) * ((x_m * pow(s_m, 2.0)) * x_m))) <= -2e-180) {
		tmp = (((x_m * x_m) * -2.0) / ((((s_m * s_m) * x_m) * x_m) * c_m)) / c_m;
	} else {
		tmp = (1.0 / t_0) / t_0;
	}
	return tmp;
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    real(8) :: tmp
    t_0 = c_m * (s_m * x_m)
    if ((cos((2.0d0 * x_m)) / ((c_m ** 2.0d0) * ((x_m * (s_m ** 2.0d0)) * x_m))) <= (-2d-180)) then
        tmp = (((x_m * x_m) * (-2.0d0)) / ((((s_m * s_m) * x_m) * x_m) * c_m)) / c_m
    else
        tmp = (1.0d0 / t_0) / t_0
    end if
    code = tmp
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	double tmp;
	if ((Math.cos((2.0 * x_m)) / (Math.pow(c_m, 2.0) * ((x_m * Math.pow(s_m, 2.0)) * x_m))) <= -2e-180) {
		tmp = (((x_m * x_m) * -2.0) / ((((s_m * s_m) * x_m) * x_m) * c_m)) / c_m;
	} else {
		tmp = (1.0 / t_0) / t_0;
	}
	return tmp;
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = c_m * (s_m * x_m)
	tmp = 0
	if (math.cos((2.0 * x_m)) / (math.pow(c_m, 2.0) * ((x_m * math.pow(s_m, 2.0)) * x_m))) <= -2e-180:
		tmp = (((x_m * x_m) * -2.0) / ((((s_m * s_m) * x_m) * x_m) * c_m)) / c_m
	else:
		tmp = (1.0 / t_0) / t_0
	return tmp

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(c_m * Float64(s_m * x_m))
	tmp = 0.0
	if (Float64(cos(Float64(2.0 * x_m)) / Float64((c_m ^ 2.0) * Float64(Float64(x_m * (s_m ^ 2.0)) * x_m))) <= -2e-180)
		tmp = Float64(Float64(Float64(Float64(x_m * x_m) * -2.0) / Float64(Float64(Float64(Float64(s_m * s_m) * x_m) * x_m) * c_m)) / c_m);
	else
		tmp = Float64(Float64(1.0 / t_0) / t_0);
	end
	return tmp
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp_2 = code(x_m, c_m, s_m)
	t_0 = c_m * (s_m * x_m);
	tmp = 0.0;
	if ((cos((2.0 * x_m)) / ((c_m ^ 2.0) * ((x_m * (s_m ^ 2.0)) * x_m))) <= -2e-180)
		tmp = (((x_m * x_m) * -2.0) / ((((s_m * s_m) * x_m) * x_m) * c_m)) / c_m;
	else
		tmp = (1.0 / t_0) / t_0;
	end
	tmp_2 = tmp;
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[N[(N[Cos[N[(2.0 * x$95$m), $MachinePrecision]], $MachinePrecision] / N[(N[Power[c$95$m, 2.0], $MachinePrecision] * N[(N[(x$95$m * N[Power[s$95$m, 2.0], $MachinePrecision]), $MachinePrecision] * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], -2e-180], N[(N[(N[(N[(x$95$m * x$95$m), $MachinePrecision] * -2.0), $MachinePrecision] / N[(N[(N[(N[(s$95$m * s$95$m), $MachinePrecision] * x$95$m), $MachinePrecision] * x$95$m), $MachinePrecision] * c$95$m), $MachinePrecision]), $MachinePrecision] / c$95$m), $MachinePrecision], N[(N[(1.0 / t$95$0), $MachinePrecision] / t$95$0), $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if (/.f64 (cos.f64 (*.f64 #s(literal 2 binary64) x)) (*.f64 (pow.f64 c #s(literal 2 binary64)) (*.f64 (*.f64 x (pow.f64 s #s(literal 2 binary64))) x))) < -2e-180

   1. Initial program 80.0%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   2. Taylor expanded in x around 0

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

      1. +-commutative N/A

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

      2. lower-fma.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, \color{blue}{{x}^{2}}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      3. unpow2 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot \color{blue}{x}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      4. lower-*.f64 57.1

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot \color{blue}{x}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   4. Applied rewrites 57.1%

      \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(-2, x \cdot x, 1\right)}}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
   5. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      3. lift-pow.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

      6. lift-pow.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

      7. *-commutative N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot {c}^{2}}} \]

      8. *-commutative N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right) \cdot {c}^{2}} \]

      9. pow2 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\color{blue}{\left(s \cdot s\right)} \cdot x\right) \cdot x\right) \cdot {c}^{2}} \]

      10. unpow2 N/A

          \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot \color{blue}{\left(c \cdot c\right)}} \]

      11. associate-*l* N/A

          \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c}} \]

      12. associate-/r* N/A

          \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]

      13. lower-/.f64 N/A

          \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]

   6. Applied rewrites 57.2%

      \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]

   7. Taylor expanded in x around inf

      \[\leadsto \frac{\frac{-2 \cdot \color{blue}{{x}^{2}}}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]
   8. Step-by-step derivation

      1. *-commutative N/A

         \[\leadsto \frac{\frac{{x}^{2} \cdot -2}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]

      2. lower-*.f64 N/A

         \[\leadsto \frac{\frac{{x}^{2} \cdot -2}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]

      3. pow2 N/A

         \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot -2}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]

      4. lift-*.f64 57.2

         \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot -2}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]

   9. Applied rewrites 57.2%

      \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot \color{blue}{-2}}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c} \]

   if -2e-180 < (/.f64 (cos.f64 (*.f64 #s(literal 2 binary64) x)) (*.f64 (pow.f64 c #s(literal 2 binary64)) (*.f64 (*.f64 x (pow.f64 s #s(literal 2 binary64))) x)))

   1. Initial program 66.3%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   2. Taylor expanded in x around 0

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

      1. lower-/.f64 N/A

         \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

      2. *-commutative N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

      3. unpow2 N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

      4. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      6. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

      7. unpow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

      8. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      9. *-commutative N/A

         \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      10. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      11. *-commutative N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      13. unpow2 N/A

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      14. lower-*.f64 69.2

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. Applied rewrites 69.2%

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

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      6. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      7. associate-*l* N/A

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

      8. pow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

      9. associate-*l* N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot \left(\color{blue}{c} \cdot c\right)} \]

      10. pow2 N/A

          \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot c\right)} \]

      11. pow-prod-down N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(\color{blue}{c} \cdot c\right)} \]

      12. lift-*.f64 N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(c \cdot c\right)} \]

      13. pow2 N/A

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

      14. swap-sqr N/A

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

      15. lift-*.f64 N/A

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

      16. lift-*.f64 N/A

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

   6. Applied rewrites 85.3%

      \[\leadsto \frac{\frac{1}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 5: 82.6% accurate, 0.7× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := c\_m \cdot \left(s\_m \cdot x\_m\right)\\ \mathbf{if}\;\frac{\cos \left(2 \cdot x\_m\right)}{{c\_m}^{2} \cdot \left(\left(x\_m \cdot {s\_m}^{2}\right) \cdot x\_m\right)} \leq -2 \cdot 10^{-180}:\\ \;\;\;\;\frac{\frac{\left(x\_m \cdot x\_m\right) \cdot -2}{\left(\left(x\_m \cdot x\_m\right) \cdot \left(s\_m \cdot s\_m\right)\right) \cdot c\_m}}{c\_m}\\ \mathbf{else}:\\ \;\;\;\;\frac{\frac{1}{t\_0}}{t\_0}\\ \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* c_m (* s_m x_m))))
   (if (<=
        (/ (cos (* 2.0 x_m)) (* (pow c_m 2.0) (* (* x_m (pow s_m 2.0)) x_m)))
        -2e-180)
     (/ (/ (* (* x_m x_m) -2.0) (* (* (* x_m x_m) (* s_m s_m)) c_m)) c_m)
     (/ (/ 1.0 t_0) t_0))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	double tmp;
	if ((cos((2.0 * x_m)) / (pow(c_m, 2.0) * ((x_m * pow(s_m, 2.0)) * x_m))) <= -2e-180) {
		tmp = (((x_m * x_m) * -2.0) / (((x_m * x_m) * (s_m * s_m)) * c_m)) / c_m;
	} else {
		tmp = (1.0 / t_0) / t_0;
	}
	return tmp;
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    real(8) :: tmp
    t_0 = c_m * (s_m * x_m)
    if ((cos((2.0d0 * x_m)) / ((c_m ** 2.0d0) * ((x_m * (s_m ** 2.0d0)) * x_m))) <= (-2d-180)) then
        tmp = (((x_m * x_m) * (-2.0d0)) / (((x_m * x_m) * (s_m * s_m)) * c_m)) / c_m
    else
        tmp = (1.0d0 / t_0) / t_0
    end if
    code = tmp
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	double tmp;
	if ((Math.cos((2.0 * x_m)) / (Math.pow(c_m, 2.0) * ((x_m * Math.pow(s_m, 2.0)) * x_m))) <= -2e-180) {
		tmp = (((x_m * x_m) * -2.0) / (((x_m * x_m) * (s_m * s_m)) * c_m)) / c_m;
	} else {
		tmp = (1.0 / t_0) / t_0;
	}
	return tmp;
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = c_m * (s_m * x_m)
	tmp = 0
	if (math.cos((2.0 * x_m)) / (math.pow(c_m, 2.0) * ((x_m * math.pow(s_m, 2.0)) * x_m))) <= -2e-180:
		tmp = (((x_m * x_m) * -2.0) / (((x_m * x_m) * (s_m * s_m)) * c_m)) / c_m
	else:
		tmp = (1.0 / t_0) / t_0
	return tmp

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(c_m * Float64(s_m * x_m))
	tmp = 0.0
	if (Float64(cos(Float64(2.0 * x_m)) / Float64((c_m ^ 2.0) * Float64(Float64(x_m * (s_m ^ 2.0)) * x_m))) <= -2e-180)
		tmp = Float64(Float64(Float64(Float64(x_m * x_m) * -2.0) / Float64(Float64(Float64(x_m * x_m) * Float64(s_m * s_m)) * c_m)) / c_m);
	else
		tmp = Float64(Float64(1.0 / t_0) / t_0);
	end
	return tmp
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp_2 = code(x_m, c_m, s_m)
	t_0 = c_m * (s_m * x_m);
	tmp = 0.0;
	if ((cos((2.0 * x_m)) / ((c_m ^ 2.0) * ((x_m * (s_m ^ 2.0)) * x_m))) <= -2e-180)
		tmp = (((x_m * x_m) * -2.0) / (((x_m * x_m) * (s_m * s_m)) * c_m)) / c_m;
	else
		tmp = (1.0 / t_0) / t_0;
	end
	tmp_2 = tmp;
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[N[(N[Cos[N[(2.0 * x$95$m), $MachinePrecision]], $MachinePrecision] / N[(N[Power[c$95$m, 2.0], $MachinePrecision] * N[(N[(x$95$m * N[Power[s$95$m, 2.0], $MachinePrecision]), $MachinePrecision] * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], -2e-180], N[(N[(N[(N[(x$95$m * x$95$m), $MachinePrecision] * -2.0), $MachinePrecision] / N[(N[(N[(x$95$m * x$95$m), $MachinePrecision] * N[(s$95$m * s$95$m), $MachinePrecision]), $MachinePrecision] * c$95$m), $MachinePrecision]), $MachinePrecision] / c$95$m), $MachinePrecision], N[(N[(1.0 / t$95$0), $MachinePrecision] / t$95$0), $MachinePrecision]]]

Derivation

1. Split input into 2 regimes

2. if (/.f64 (cos.f64 (*.f64 #s(literal 2 binary64) x)) (*.f64 (pow.f64 c #s(literal 2 binary64)) (*.f64 (*.f64 x (pow.f64 s #s(literal 2 binary64))) x))) < -2e-180

   1. Initial program 80.0%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   2. Taylor expanded in x around 0

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

      1. +-commutative N/A

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

      2. lower-fma.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, \color{blue}{{x}^{2}}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      3. unpow2 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot \color{blue}{x}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      4. lower-*.f64 57.1

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot \color{blue}{x}, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   4. Applied rewrites 57.1%

      \[\leadsto \frac{\color{blue}{\mathsf{fma}\left(-2, x \cdot x, 1\right)}}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
   5. Step-by-step derivation

      1. lift-/.f64 N/A

         \[\leadsto \color{blue}{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      3. lift-pow.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

      6. lift-pow.f64 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

      7. *-commutative N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot {c}^{2}}} \]

      8. *-commutative N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right) \cdot {c}^{2}} \]

      9. pow2 N/A

         \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\color{blue}{\left(s \cdot s\right)} \cdot x\right) \cdot x\right) \cdot {c}^{2}} \]

      10. unpow2 N/A

          \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot \color{blue}{\left(c \cdot c\right)}} \]

      11. associate-*l* N/A

          \[\leadsto \frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\color{blue}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c}} \]

      12. associate-/r* N/A

          \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]

      13. lower-/.f64 N/A

          \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(-2, x \cdot x, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]

   6. Applied rewrites 57.2%

      \[\leadsto \color{blue}{\frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c}}{c}} \]
   7. Step-by-step derivation

      1. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\left(\color{blue}{\left(s \cdot s\right)} \cdot x\right) \cdot x\right) \cdot c}}{c} \]

      2. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\color{blue}{\left(\left(s \cdot s\right) \cdot x\right)} \cdot x\right) \cdot c}}{c} \]

      3. lower-*.f64 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\color{blue}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right)} \cdot c}}{c} \]

      4. associate-*l* N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\color{blue}{\left(\left(s \cdot s\right) \cdot \left(x \cdot x\right)\right)} \cdot c}}{c} \]

      5. pow2 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\left(s \cdot s\right) \cdot \color{blue}{{x}^{2}}\right) \cdot c}}{c} \]

      6. *-commutative N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\color{blue}{\left({x}^{2} \cdot \left(s \cdot s\right)\right)} \cdot c}}{c} \]

      7. lower-*.f64 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\color{blue}{\left({x}^{2} \cdot \left(s \cdot s\right)\right)} \cdot c}}{c} \]

      8. pow2 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\color{blue}{\left(x \cdot x\right)} \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

      9. lift-*.f64 N/A

         \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\color{blue}{\left(x \cdot x\right)} \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

      10. lift-*.f64 41.7

          \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\left(\left(x \cdot x\right) \cdot \color{blue}{\left(s \cdot s\right)}\right) \cdot c}}{c} \]

   8. Applied rewrites 41.7%

      \[\leadsto \frac{\frac{\mathsf{fma}\left(x \cdot x, -2, 1\right)}{\color{blue}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right)} \cdot c}}{c} \]

   9. Taylor expanded in x around inf

      \[\leadsto \frac{\frac{-2 \cdot \color{blue}{{x}^{2}}}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]
   10. Step-by-step derivation

       1. *-commutative N/A

          \[\leadsto \frac{\frac{{x}^{2} \cdot -2}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

       2. lower-*.f64 N/A

          \[\leadsto \frac{\frac{{x}^{2} \cdot -2}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

       3. pow2 N/A

          \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot -2}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

       4. lift-*.f64 41.7

          \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot -2}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

   11. Applied rewrites 41.7%

       \[\leadsto \frac{\frac{\left(x \cdot x\right) \cdot \color{blue}{-2}}{\left(\left(x \cdot x\right) \cdot \left(s \cdot s\right)\right) \cdot c}}{c} \]

   if -2e-180 < (/.f64 (cos.f64 (*.f64 #s(literal 2 binary64) x)) (*.f64 (pow.f64 c #s(literal 2 binary64)) (*.f64 (*.f64 x (pow.f64 s #s(literal 2 binary64))) x)))

   1. Initial program 66.3%

      \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   2. Taylor expanded in x around 0

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

      1. lower-/.f64 N/A

         \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

      2. *-commutative N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

      3. unpow2 N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

      4. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      5. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

      6. lower-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

      7. unpow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

      8. associate-*r* N/A

         \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      9. *-commutative N/A

         \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      10. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

      11. *-commutative N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      12. lower-*.f64 N/A

          \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      13. unpow2 N/A

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      14. lower-*.f64 69.2

          \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. Applied rewrites 69.2%

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

      1. lift-/.f64 N/A

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

      2. lift-*.f64 N/A

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

      3. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      4. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      5. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      6. lift-*.f64 N/A

         \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

      7. associate-*l* N/A

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

      8. pow2 N/A

         \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

      9. associate-*l* N/A

         \[\leadsto \frac{1}{\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot \left(\color{blue}{c} \cdot c\right)} \]

      10. pow2 N/A

          \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot c\right)} \]

      11. pow-prod-down N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(\color{blue}{c} \cdot c\right)} \]

      12. lift-*.f64 N/A

          \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(c \cdot c\right)} \]

      13. pow2 N/A

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

      14. swap-sqr N/A

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

      15. lift-*.f64 N/A

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

      16. lift-*.f64 N/A

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

   6. Applied rewrites 85.3%

      \[\leadsto \frac{\frac{1}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 80.1% accurate, 4.1× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := c\_m \cdot \left(s\_m \cdot x\_m\right)\\ \frac{\frac{1}{t\_0}}{t\_0} \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* c_m (* s_m x_m)))) (/ (/ 1.0 t_0) t_0)))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	return (1.0 / t_0) / t_0;
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    t_0 = c_m * (s_m * x_m)
    code = (1.0d0 / t_0) / t_0
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = c_m * (s_m * x_m);
	return (1.0 / t_0) / t_0;
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = c_m * (s_m * x_m)
	return (1.0 / t_0) / t_0

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(c_m * Float64(s_m * x_m))
	return Float64(Float64(1.0 / t_0) / t_0)
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	t_0 = c_m * (s_m * x_m);
	tmp = (1.0 / t_0) / t_0;
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]}, N[(N[(1.0 / t$95$0), $MachinePrecision] / t$95$0), $MachinePrecision]]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-/.f64 N/A

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

   2. lift-*.f64 N/A

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

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   6. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   7. associate-*l* N/A

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

   8. pow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

   9. associate-*l* N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot \left(\color{blue}{c} \cdot c\right)} \]

   10. pow2 N/A

       \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot c\right)} \]

   11. pow-prod-down N/A

       \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(\color{blue}{c} \cdot c\right)} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{1}{{\left(s \cdot x\right)}^{2} \cdot \left(c \cdot c\right)} \]

   13. pow2 N/A

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

   14. swap-sqr N/A

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

   15. lift-*.f64 N/A

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

   16. lift-*.f64 N/A

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

6. Applied rewrites 80.1%

   \[\leadsto \frac{\frac{1}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]
7. Add Preprocessing

Alternative 7: 80.0% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \begin{array}{l} t_0 := \left(s\_m \cdot x\_m\right) \cdot c\_m\\ \frac{1}{t\_0 \cdot t\_0} \end{array} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (let* ((t_0 (* (* s_m x_m) c_m))) (/ 1.0 (* t_0 t_0))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	double t_0 = (s_m * x_m) * c_m;
	return 1.0 / (t_0 * t_0);
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    real(8) :: t_0
    t_0 = (s_m * x_m) * c_m
    code = 1.0d0 / (t_0 * t_0)
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	double t_0 = (s_m * x_m) * c_m;
	return 1.0 / (t_0 * t_0);
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	t_0 = (s_m * x_m) * c_m
	return 1.0 / (t_0 * t_0)

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	t_0 = Float64(Float64(s_m * x_m) * c_m)
	return Float64(1.0 / Float64(t_0 * t_0))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	t_0 = (s_m * x_m) * c_m;
	tmp = 1.0 / (t_0 * t_0);
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := Block[{t$95$0 = N[(N[(s$95$m * x$95$m), $MachinePrecision] * c$95$m), $MachinePrecision]}, N[(1.0 / N[(t$95$0 * t$95$0), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
2. Step-by-step derivation

   1. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   2. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{c}^{2}} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left(x \cdot {s}^{2}\right)} \cdot x\right)} \]

   5. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot \color{blue}{{s}^{2}}\right) \cdot x\right)} \]

   6. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\color{blue}{\left({s}^{2} \cdot x\right)} \cdot x\right)} \]

   7. associate-*r* N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \color{blue}{\left({s}^{2} \cdot \left(x \cdot x\right)\right)}} \]

   8. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left({s}^{2} \cdot \color{blue}{{x}^{2}}\right)} \]

   9. *-commutative N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left({s}^{2} \cdot {x}^{2}\right) \cdot {c}^{2}}} \]

   10. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(s \cdot x\right)}^{2}} \cdot {c}^{2}} \]

   11. pow-prod-down N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   12. lower-pow.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}}^{2}} \]

   14. lower-*.f64 96.9

       \[\leadsto \frac{\cos \left(2 \cdot x\right)}{{\left(\color{blue}{\left(s \cdot x\right)} \cdot c\right)}^{2}} \]

3. Applied rewrites 96.9%

   \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]
4. Step-by-step derivation

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{\cos \color{blue}{\left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   3. lift-cos.f64 N/A

      \[\leadsto \frac{\color{blue}{\cos \left(2 \cdot x\right)}}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}} \]

   4. lift-pow.f64 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{{\left(\left(s \cdot x\right) \cdot c\right)}^{2}}} \]

   5. unpow2 N/A

      \[\leadsto \frac{\cos \left(2 \cdot x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]

   6. associate-/r* N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   7. lower-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c}} \]

   8. lower-/.f64 N/A

      \[\leadsto \frac{\color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   9. lift-cos.f64 N/A

      \[\leadsto \frac{\frac{\color{blue}{\cos \left(2 \cdot x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   10. count-2-rev N/A

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   11. lower-+.f64 97.1

       \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{\left(s \cdot x\right) \cdot c}}{\left(s \cdot x\right) \cdot c} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{\left(s \cdot x\right) \cdot c}}}{\left(s \cdot x\right) \cdot c} \]

   13. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   14. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{\left(s \cdot x\right) \cdot c} \]

   15. lift-*.f64 N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{\left(s \cdot x\right) \cdot c}} \]

   16. *-commutative N/A

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   17. lower-*.f64 97.1

       \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

5. Applied rewrites 97.1%

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

   1. lift-/.f64 N/A

      \[\leadsto \color{blue}{\frac{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)}} \]

   2. lift-/.f64 N/A

      \[\leadsto \frac{\color{blue}{\frac{\cos \left(x + x\right)}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   3. lift-+.f64 N/A

      \[\leadsto \frac{\frac{\cos \color{blue}{\left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   4. lift-cos.f64 N/A

      \[\leadsto \frac{\frac{\color{blue}{\cos \left(x + x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(x + x\right)}{\color{blue}{c \cdot \left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   6. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(x + x\right)}{c \cdot \color{blue}{\left(s \cdot x\right)}}}{c \cdot \left(s \cdot x\right)} \]

   7. count-2-rev N/A

      \[\leadsto \frac{\frac{\cos \color{blue}{\left(2 \cdot x\right)}}{c \cdot \left(s \cdot x\right)}}{c \cdot \left(s \cdot x\right)} \]

   8. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{\color{blue}{c \cdot \left(s \cdot x\right)}} \]

   9. lift-*.f64 N/A

      \[\leadsto \frac{\frac{\cos \left(2 \cdot x\right)}{c \cdot \left(s \cdot x\right)}}{c \cdot \color{blue}{\left(s \cdot x\right)}} \]

   10. associate-/l/ N/A

       \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   11. lower-/.f64 N/A

       \[\leadsto \color{blue}{\frac{\cos \left(2 \cdot x\right)}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   12. count-2-rev N/A

       \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   13. lift-cos.f64 N/A

       \[\leadsto \frac{\color{blue}{\cos \left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   14. lift-+.f64 N/A

       \[\leadsto \frac{\cos \color{blue}{\left(x + x\right)}}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   15. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(c \cdot \left(s \cdot x\right)\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)}} \]

   16. lift-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(c \cdot \color{blue}{\left(s \cdot x\right)}\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   17. *-commutative N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   18. lower-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\color{blue}{\left(\left(s \cdot x\right) \cdot c\right)} \cdot \left(c \cdot \left(s \cdot x\right)\right)} \]

   19. lift-*.f64 N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(c \cdot \color{blue}{\left(s \cdot x\right)}\right)} \]

   20. *-commutative N/A

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

   21. lower-*.f64 96.9

       \[\leadsto \frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \color{blue}{\left(\left(s \cdot x\right) \cdot c\right)}} \]

7. Applied rewrites 96.9%

   \[\leadsto \color{blue}{\frac{\cos \left(x + x\right)}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)}} \]

8. Taylor expanded in x around 0

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

10. Applied rewrites 80.0%

    \[\leadsto \frac{\color{blue}{1}}{\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)} \]
11. Add Preprocessing

Alternative 8: 79.3% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{\left(\left(s\_m \cdot x\_m\right) \cdot \left(c\_m \cdot \left(s\_m \cdot x\_m\right)\right)\right) \cdot c\_m} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* (* (* s_m x_m) (* c_m (* s_m x_m))) c_m)))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / (((s_m * x_m) * (c_m * (s_m * x_m))) * c_m);
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / (((s_m * x_m) * (c_m * (s_m * x_m))) * c_m)
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / (((s_m * x_m) * (c_m * (s_m * x_m))) * c_m);
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / (((s_m * x_m) * (c_m * (s_m * x_m))) * c_m)

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(Float64(Float64(s_m * x_m) * Float64(c_m * Float64(s_m * x_m))) * c_m))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / (((s_m * x_m) * (c_m * (s_m * x_m))) * c_m);
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(N[(N[(s$95$m * x$95$m), $MachinePrecision] * N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * c$95$m), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. pow2 N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   6. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   7. pow2 N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot s\right) \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. swap-sqr N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot x\right) \cdot \left(s \cdot x\right)\right) \cdot c\right) \cdot c} \]

   9. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot x\right) \cdot \left(s \cdot x\right)\right) \cdot c\right) \cdot c} \]

   10. lift-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(s \cdot x\right) \cdot \left(s \cdot x\right)\right) \cdot c\right) \cdot c} \]

   11. associate-*l* N/A

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)\right) \cdot c} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)\right) \cdot c} \]

   13. lower-*.f64 79.3

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)\right) \cdot c} \]

   14. lift-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(\left(s \cdot x\right) \cdot c\right)\right) \cdot c} \]

   15. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)\right) \cdot c} \]

   16. lower-*.f64 79.3

       \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)\right) \cdot c} \]

6. Applied rewrites 79.3%

   \[\leadsto \frac{1}{\left(\left(s \cdot x\right) \cdot \left(c \cdot \left(s \cdot x\right)\right)\right) \cdot c} \]
7. Add Preprocessing

Alternative 9: 76.1% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{\left(\left(c\_m \cdot \left(c\_m \cdot \left(s\_m \cdot x\_m\right)\right)\right) \cdot s\_m\right) \cdot x\_m} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* (* (* c_m (* c_m (* s_m x_m))) s_m) x_m)))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / (((c_m * (c_m * (s_m * x_m))) * s_m) * x_m);
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / (((c_m * (c_m * (s_m * x_m))) * s_m) * x_m)
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / (((c_m * (c_m * (s_m * x_m))) * s_m) * x_m);
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / (((c_m * (c_m * (s_m * x_m))) * s_m) * x_m)

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(Float64(Float64(c_m * Float64(c_m * Float64(s_m * x_m))) * s_m) * x_m))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / (((c_m * (c_m * (s_m * x_m))) * s_m) * x_m);
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(N[(N[(c$95$m * N[(c$95$m * N[(s$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * s$95$m), $MachinePrecision] * x$95$m), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. lower-*.f64 N/A

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

   6. associate-*l* N/A

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

   7. pow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

   8. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot \left(c \cdot c\right)} \]

   9. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot {c}^{\color{blue}{2}}} \]

   10. *-commutative N/A

       \[\leadsto \frac{1}{{c}^{2} \cdot \color{blue}{\left(\left(x \cdot {s}^{2}\right) \cdot x\right)}} \]

   11. associate-*r* N/A

       \[\leadsto \frac{1}{\left({c}^{2} \cdot \left(x \cdot {s}^{2}\right)\right) \cdot \color{blue}{x}} \]

   12. *-commutative N/A

       \[\leadsto \frac{1}{\left({c}^{2} \cdot \left({s}^{2} \cdot x\right)\right) \cdot x} \]

   13. associate-*r* N/A

       \[\leadsto \frac{1}{\left(\left({c}^{2} \cdot {s}^{2}\right) \cdot x\right) \cdot x} \]

   14. associate-*r* N/A

       \[\leadsto \frac{1}{\left({c}^{2} \cdot {s}^{2}\right) \cdot \color{blue}{\left(x \cdot x\right)}} \]

   15. pow2 N/A

       \[\leadsto \frac{1}{\left({c}^{2} \cdot {s}^{2}\right) \cdot {x}^{\color{blue}{2}}} \]

   16. associate-*r* N/A

       \[\leadsto \frac{1}{{c}^{2} \cdot \color{blue}{\left({s}^{2} \cdot {x}^{2}\right)}} \]

   17. pow-prod-down N/A

       \[\leadsto \frac{1}{{c}^{2} \cdot {\left(s \cdot x\right)}^{\color{blue}{2}}} \]

   18. lift-*.f64 N/A

       \[\leadsto \frac{1}{{c}^{2} \cdot {\left(s \cdot x\right)}^{2}} \]

   19. pow2 N/A

       \[\leadsto \frac{1}{{c}^{2} \cdot \left(\left(s \cdot x\right) \cdot \color{blue}{\left(s \cdot x\right)}\right)} \]

   20. associate-*r* N/A

       \[\leadsto \frac{1}{\left({c}^{2} \cdot \left(s \cdot x\right)\right) \cdot \color{blue}{\left(s \cdot x\right)}} \]

6. Applied rewrites 75.8%

   \[\leadsto \frac{1}{\color{blue}{\left(\left(c \cdot \left(c \cdot \left(s \cdot x\right)\right)\right) \cdot s\right) \cdot x}} \]
7. Add Preprocessing

Alternative 10: 75.8% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{\left(s\_m \cdot \left(\left(s\_m \cdot x\_m\right) \cdot \left(c\_m \cdot x\_m\right)\right)\right) \cdot c\_m} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* (* s_m (* (* s_m x_m) (* c_m x_m))) c_m)))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / ((s_m * ((s_m * x_m) * (c_m * x_m))) * c_m);
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / ((s_m * ((s_m * x_m) * (c_m * x_m))) * c_m)
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / ((s_m * ((s_m * x_m) * (c_m * x_m))) * c_m);
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / ((s_m * ((s_m * x_m) * (c_m * x_m))) * c_m)

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(Float64(s_m * Float64(Float64(s_m * x_m) * Float64(c_m * x_m))) * c_m))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / ((s_m * ((s_m * x_m) * (c_m * x_m))) * c_m);
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(N[(s$95$m * N[(N[(s$95$m * x$95$m), $MachinePrecision] * N[(c$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * c$95$m), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   6. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   7. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   8. associate-*l* N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   9. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   12. lower-*.f64 76.1

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

6. Applied rewrites 76.1%

   \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]
7. Add Preprocessing

Alternative 11: 73.8% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{s\_m \cdot \left(\left(\left(c\_m \cdot s\_m\right) \cdot x\_m\right) \cdot \left(x\_m \cdot c\_m\right)\right)} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* s_m (* (* (* c_m s_m) x_m) (* x_m c_m)))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * (((c_m * s_m) * x_m) * (x_m * c_m)));
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / (s_m * (((c_m * s_m) * x_m) * (x_m * c_m)))
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * (((c_m * s_m) * x_m) * (x_m * c_m)));
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / (s_m * (((c_m * s_m) * x_m) * (x_m * c_m)))

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(s_m * Float64(Float64(Float64(c_m * s_m) * x_m) * Float64(x_m * c_m))))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / (s_m * (((c_m * s_m) * x_m) * (x_m * c_m)));
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(s$95$m * N[(N[(N[(c$95$m * s$95$m), $MachinePrecision] * x$95$m), $MachinePrecision] * N[(x$95$m * c$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   6. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   7. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   8. associate-*l* N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   9. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   12. lower-*.f64 76.1

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

6. Applied rewrites 76.1%

   \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]
7. Step-by-step derivation

   1. lift-*.f64 N/A

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

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   6. associate-*l* N/A

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

   7. lower-*.f64 N/A

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

   8. lower-*.f64 N/A

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

   9. lift-*.f64 N/A

      \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right) \cdot c\right)} \]

   10. associate-*r* N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   14. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   15. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   16. lower-*.f64 74.6

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

8. Applied rewrites 74.6%

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

   1. lift-*.f64 N/A

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

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   3. associate-*l* N/A

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

   4. lower-*.f64 N/A

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

   5. lift-*.f64 N/A

      \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot x\right) \cdot c\right) \cdot \left(x \cdot c\right)\right)} \]

   6. lift-*.f64 N/A

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

   7. *-commutative N/A

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

   8. associate-*r* N/A

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

   9. lower-*.f64 N/A

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

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot s\right) \cdot x\right) \cdot \left(x \cdot c\right)\right)} \]

   11. lower-*.f64 73.8

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

10. Applied rewrites 73.8%

    \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot s\right) \cdot x\right) \cdot \color{blue}{\left(x \cdot c\right)}\right)} \]
11. Add Preprocessing

Alternative 12: 67.4% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{s\_m \cdot \left(\left(\left(\left(x\_m \cdot x\_m\right) \cdot s\_m\right) \cdot c\_m\right) \cdot c\_m\right)} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* s_m (* (* (* (* x_m x_m) s_m) c_m) c_m))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * ((((x_m * x_m) * s_m) * c_m) * c_m));
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / (s_m * ((((x_m * x_m) * s_m) * c_m) * c_m))
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * ((((x_m * x_m) * s_m) * c_m) * c_m));
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / (s_m * ((((x_m * x_m) * s_m) * c_m) * c_m))

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(s_m * Float64(Float64(Float64(Float64(x_m * x_m) * s_m) * c_m) * c_m)))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / (s_m * ((((x_m * x_m) * s_m) * c_m) * c_m));
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(s$95$m * N[(N[(N[(N[(x$95$m * x$95$m), $MachinePrecision] * s$95$m), $MachinePrecision] * c$95$m), $MachinePrecision] * c$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   6. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   7. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   8. associate-*l* N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   9. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   12. lower-*.f64 76.1

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

6. Applied rewrites 76.1%

   \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]
7. Step-by-step derivation

   1. lift-*.f64 N/A

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

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   6. associate-*l* N/A

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

   7. lower-*.f64 N/A

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

   8. lower-*.f64 N/A

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

   9. lift-*.f64 N/A

      \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right) \cdot c\right)} \]

   10. associate-*r* N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   14. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   15. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   16. lower-*.f64 74.6

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

8. Applied rewrites 74.6%

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

9. Taylor expanded in x around 0

   \[\leadsto \frac{1}{s \cdot \left(\left(c \cdot \left(s \cdot {x}^{2}\right)\right) \cdot c\right)} \]
10. Step-by-step derivation

    1. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot {x}^{2}\right) \cdot c\right) \cdot c\right)} \]

    2. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot {x}^{2}\right) \cdot c\right) \cdot c\right)} \]

    3. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left({x}^{2} \cdot s\right) \cdot c\right) \cdot c\right)} \]

    4. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left({x}^{2} \cdot s\right) \cdot c\right) \cdot c\right)} \]

    5. pow2 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(x \cdot x\right) \cdot s\right) \cdot c\right) \cdot c\right)} \]

    6. lift-*.f64 67.4

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(x \cdot x\right) \cdot s\right) \cdot c\right) \cdot c\right)} \]

11. Applied rewrites 67.4%

    \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(x \cdot x\right) \cdot s\right) \cdot c\right) \cdot c\right)} \]
12. Add Preprocessing

Alternative 13: 62.4% accurate, 4.2× speedup

Math

\[\begin{array}{l} x_m = \left|x\right| \\ c_m = \left|c\right| \\ s_m = \left|s\right| \\ [x_m, c_m, s_m] = \mathsf{sort}([x_m, c_m, s_m])\\ \\ \frac{1}{s\_m \cdot \left(\left(\left(c\_m \cdot c\_m\right) \cdot s\_m\right) \cdot \left(x\_m \cdot x\_m\right)\right)} \end{array} \]

FPCore

x_m = (fabs.f64 x)
c_m = (fabs.f64 c)
s_m = (fabs.f64 s)
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
(FPCore (x_m c_m s_m)
 :precision binary64
 (/ 1.0 (* s_m (* (* (* c_m c_m) s_m) (* x_m x_m)))))

C

x_m = fabs(x);
c_m = fabs(c);
s_m = fabs(s);
assert(x_m < c_m && c_m < s_m);
double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * (((c_m * c_m) * s_m) * (x_m * x_m)));
}

Fortran

x_m =     private
c_m =     private
s_m =     private
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
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_m, c_m, s_m)
use fmin_fmax_functions
    real(8), intent (in) :: x_m
    real(8), intent (in) :: c_m
    real(8), intent (in) :: s_m
    code = 1.0d0 / (s_m * (((c_m * c_m) * s_m) * (x_m * x_m)))
end function

Java

x_m = Math.abs(x);
c_m = Math.abs(c);
s_m = Math.abs(s);
assert x_m < c_m && c_m < s_m;
public static double code(double x_m, double c_m, double s_m) {
	return 1.0 / (s_m * (((c_m * c_m) * s_m) * (x_m * x_m)));
}

Python

x_m = math.fabs(x)
c_m = math.fabs(c)
s_m = math.fabs(s)
[x_m, c_m, s_m] = sort([x_m, c_m, s_m])
def code(x_m, c_m, s_m):
	return 1.0 / (s_m * (((c_m * c_m) * s_m) * (x_m * x_m)))

Julia

x_m = abs(x)
c_m = abs(c)
s_m = abs(s)
x_m, c_m, s_m = sort([x_m, c_m, s_m])
function code(x_m, c_m, s_m)
	return Float64(1.0 / Float64(s_m * Float64(Float64(Float64(c_m * c_m) * s_m) * Float64(x_m * x_m))))
end

MATLAB

x_m = abs(x);
c_m = abs(c);
s_m = abs(s);
x_m, c_m, s_m = num2cell(sort([x_m, c_m, s_m])){:}
function tmp = code(x_m, c_m, s_m)
	tmp = 1.0 / (s_m * (((c_m * c_m) * s_m) * (x_m * x_m)));
end

Wolfram

x_m = N[Abs[x], $MachinePrecision]
c_m = N[Abs[c], $MachinePrecision]
s_m = N[Abs[s], $MachinePrecision]
NOTE: x_m, c_m, and s_m should be sorted in increasing order before calling this function.
code[x$95$m_, c$95$m_, s$95$m_] := N[(1.0 / N[(s$95$m * N[(N[(N[(c$95$m * c$95$m), $MachinePrecision] * s$95$m), $MachinePrecision] * N[(x$95$m * x$95$m), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 67.1%

   \[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]

2. Taylor expanded in x around 0

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

   1. lower-/.f64 N/A

      \[\leadsto \frac{1}{\color{blue}{{c}^{2} \cdot \left({s}^{2} \cdot {x}^{2}\right)}} \]

   2. *-commutative N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \color{blue}{{c}^{2}}} \]

   3. unpow2 N/A

      \[\leadsto \frac{1}{\left({s}^{2} \cdot {x}^{2}\right) \cdot \left(c \cdot \color{blue}{c}\right)} \]

   4. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   5. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot \color{blue}{c}} \]

   6. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot {x}^{2}\right) \cdot c\right) \cdot c} \]

   7. unpow2 N/A

      \[\leadsto \frac{1}{\left(\left({s}^{2} \cdot \left(x \cdot x\right)\right) \cdot c\right) \cdot c} \]

   8. associate-*r* N/A

      \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   9. *-commutative N/A

      \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left(x \cdot {s}^{2}\right) \cdot x\right) \cdot c\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   12. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(\left(\left({s}^{2} \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   13. unpow2 N/A

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   14. lower-*.f64 64.9

       \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

4. Applied rewrites 64.9%

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

   1. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot x\right) \cdot c\right) \cdot c} \]

   5. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(\left(s \cdot s\right) \cdot x\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   6. associate-*l* N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   7. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(\left(s \cdot \left(s \cdot x\right)\right) \cdot \left(x \cdot c\right)\right) \cdot c} \]

   8. associate-*l* N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   9. lower-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   10. lower-*.f64 N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(x \cdot c\right)\right)\right) \cdot c} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   12. lower-*.f64 76.1

       \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

6. Applied rewrites 76.1%

   \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]
7. Step-by-step derivation

   1. lift-*.f64 N/A

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

   2. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   3. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   4. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   5. lift-*.f64 N/A

      \[\leadsto \frac{1}{\left(s \cdot \left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right)\right) \cdot c} \]

   6. associate-*l* N/A

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

   7. lower-*.f64 N/A

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

   8. lower-*.f64 N/A

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

   9. lift-*.f64 N/A

      \[\leadsto \frac{1}{s \cdot \left(\left(\left(s \cdot x\right) \cdot \left(c \cdot x\right)\right) \cdot c\right)} \]

   10. associate-*r* N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   11. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   12. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   13. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   14. lift-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot \left(s \cdot x\right)\right) \cdot x\right) \cdot c\right)} \]

   15. *-commutative N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

   16. lower-*.f64 74.6

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(\left(s \cdot x\right) \cdot c\right) \cdot x\right) \cdot c\right)} \]

8. Applied rewrites 74.6%

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

9. Taylor expanded in x around 0

   \[\leadsto \frac{1}{s \cdot \left({c}^{2} \cdot \color{blue}{\left(s \cdot {x}^{2}\right)}\right)} \]
10. Step-by-step derivation

    1. associate-*r* N/A

       \[\leadsto \frac{1}{s \cdot \left(\left({c}^{2} \cdot s\right) \cdot {x}^{\color{blue}{2}}\right)} \]

    2. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left({c}^{2} \cdot s\right) \cdot {x}^{\color{blue}{2}}\right)} \]

    3. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left({c}^{2} \cdot s\right) \cdot {x}^{2}\right)} \]

    4. unpow2 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot c\right) \cdot s\right) \cdot {x}^{2}\right)} \]

    5. lower-*.f64 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot c\right) \cdot s\right) \cdot {x}^{2}\right)} \]

    6. pow2 N/A

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot c\right) \cdot s\right) \cdot \left(x \cdot x\right)\right)} \]

    7. lift-*.f64 62.4

       \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot c\right) \cdot s\right) \cdot \left(x \cdot x\right)\right)} \]

11. Applied rewrites 62.4%

    \[\leadsto \frac{1}{s \cdot \left(\left(\left(c \cdot c\right) \cdot s\right) \cdot \color{blue}{\left(x \cdot x\right)}\right)} \]
12. Add Preprocessing

Reproduce

herbie shell --seed 2025117 
(FPCore (x c s)
  :name "mixedcos"
  :precision binary64
  (/ (cos (* 2.0 x)) (* (pow c 2.0) (* (* x (pow s 2.0)) x))))