Codec.Picture.Jpg.FastDct:referenceDct from JuicyPixels-3.2.6.1

Percentage Accurate: 27.6% → 31.7%

Time: 20.8s

Alternatives: 3

Speedup: 225.0×

Specification

Math

\[\begin{array}{l} \\ \left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (*
  (* x (cos (/ (* (* (+ (* y 2.0) 1.0) z) t) 16.0)))
  (cos (/ (* (* (+ (* a 2.0) 1.0) b) t) 16.0))))

C

double code(double x, double y, double z, double t, double a, double b) {
	return (x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
}

Fortran

real(8) function code(x, y, z, t, a, b)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = (x * cos((((((y * 2.0d0) + 1.0d0) * z) * t) / 16.0d0))) * cos((((((a * 2.0d0) + 1.0d0) * b) * t) / 16.0d0))
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return (x * Math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * Math.cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
}

Python

def code(x, y, z, t, a, b):
	return (x * math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * math.cos((((((a * 2.0) + 1.0) * b) * t) / 16.0))

Julia

function code(x, y, z, t, a, b)
	return Float64(Float64(x * cos(Float64(Float64(Float64(Float64(Float64(y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(Float64(Float64(Float64(Float64(Float64(a * 2.0) + 1.0) * b) * t) / 16.0)))
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = (x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(N[(x * N[Cos[N[(N[(N[(N[(N[(y * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * z), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Cos[N[(N[(N[(N[(N[(a * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * b), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]

Initial Program: 27.6% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (*
  (* x (cos (/ (* (* (+ (* y 2.0) 1.0) z) t) 16.0)))
  (cos (/ (* (* (+ (* a 2.0) 1.0) b) t) 16.0))))

C

double code(double x, double y, double z, double t, double a, double b) {
	return (x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
}

Fortran

real(8) function code(x, y, z, t, a, b)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = (x * cos((((((y * 2.0d0) + 1.0d0) * z) * t) / 16.0d0))) * cos((((((a * 2.0d0) + 1.0d0) * b) * t) / 16.0d0))
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return (x * Math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * Math.cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
}

Python

def code(x, y, z, t, a, b):
	return (x * math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * math.cos((((((a * 2.0) + 1.0) * b) * t) / 16.0))

Julia

function code(x, y, z, t, a, b)
	return Float64(Float64(x * cos(Float64(Float64(Float64(Float64(Float64(y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(Float64(Float64(Float64(Float64(Float64(a * 2.0) + 1.0) * b) * t) / 16.0)))
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = (x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos((((((a * 2.0) + 1.0) * b) * t) / 16.0));
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(N[(x * N[Cos[N[(N[(N[(N[(N[(y * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * z), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Cos[N[(N[(N[(N[(N[(a * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * b), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]

Alternative 1: 31.7% accurate, 0.2× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_1 := \sqrt[3]{\cos \left(t \cdot \left(z \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{16}\right)\right)}\\ \mathbf{if}\;\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{t \cdot \left(\left(1 + 2 \cdot a\right) \cdot b\right)}{16}\right) \leq 2 \cdot 10^{+242}:\\ \;\;\;\;\left(t_1 \cdot \left(t_1 \cdot t_1\right)\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (let* ((t_1 (cbrt (cos (* t (* z (/ (fma y 2.0 1.0) 16.0)))))))
   (if (<=
        (*
         (* x (cos (/ (* (* (+ (* y 2.0) 1.0) z) t) 16.0)))
         (cos (/ (* t (* (+ 1.0 (* 2.0 a)) b)) 16.0)))
        2e+242)
     (* (* t_1 (* t_1 t_1)) (* x (cos (/ (* t (fma a 2.0 1.0)) (/ 16.0 b)))))
     x)))

C

double code(double x, double y, double z, double t, double a, double b) {
	double t_1 = cbrt(cos((t * (z * (fma(y, 2.0, 1.0) / 16.0)))));
	double tmp;
	if (((x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(((t * ((1.0 + (2.0 * a)) * b)) / 16.0))) <= 2e+242) {
		tmp = (t_1 * (t_1 * t_1)) * (x * cos(((t * fma(a, 2.0, 1.0)) / (16.0 / b))));
	} else {
		tmp = x;
	}
	return tmp;
}

Julia

function code(x, y, z, t, a, b)
	t_1 = cbrt(cos(Float64(t * Float64(z * Float64(fma(y, 2.0, 1.0) / 16.0)))))
	tmp = 0.0
	if (Float64(Float64(x * cos(Float64(Float64(Float64(Float64(Float64(y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(Float64(Float64(t * Float64(Float64(1.0 + Float64(2.0 * a)) * b)) / 16.0))) <= 2e+242)
		tmp = Float64(Float64(t_1 * Float64(t_1 * t_1)) * Float64(x * cos(Float64(Float64(t * fma(a, 2.0, 1.0)) / Float64(16.0 / b)))));
	else
		tmp = x;
	end
	return tmp
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := Block[{t$95$1 = N[Power[N[Cos[N[(t * N[(z * N[(N[(y * 2.0 + 1.0), $MachinePrecision] / 16.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision], 1/3], $MachinePrecision]}, If[LessEqual[N[(N[(x * N[Cos[N[(N[(N[(N[(N[(y * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * z), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Cos[N[(N[(t * N[(N[(1.0 + N[(2.0 * a), $MachinePrecision]), $MachinePrecision] * b), $MachinePrecision]), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], 2e+242], N[(N[(t$95$1 * N[(t$95$1 * t$95$1), $MachinePrecision]), $MachinePrecision] * N[(x * N[Cos[N[(N[(t * N[(a * 2.0 + 1.0), $MachinePrecision]), $MachinePrecision] / N[(16.0 / b), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], x]]

Derivation

1. Split input into 2 regimes

2. if (*.f64 (*.f64 x (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 y 2) 1) z) t) 16))) (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 a 2) 1) b) t) 16))) < 2.0000000000000001e242

   1. Initial program 52.2%

      \[\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]
   2. Step-by-step derivation

      1. *-commutative 52.2%

         \[\leadsto \color{blue}{\left(\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot x\right)} \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]

      2. associate-*l* 52.2%

         \[\leadsto \color{blue}{\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot \left(x \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right)} \]

      3. associate-*l/ 52.2%

         \[\leadsto \cos \color{blue}{\left(\frac{\left(y \cdot 2 + 1\right) \cdot z}{16} \cdot t\right)} \cdot \left(x \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right) \]

      4. *-commutative 52.2%

         \[\leadsto \cos \color{blue}{\left(t \cdot \frac{\left(y \cdot 2 + 1\right) \cdot z}{16}\right)} \cdot \left(x \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right) \]

      5. associate-/l* 51.8%

         \[\leadsto \cos \left(t \cdot \color{blue}{\frac{y \cdot 2 + 1}{\frac{16}{z}}}\right) \cdot \left(x \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right) \]

      6. fma-def 51.8%

         \[\leadsto \cos \left(t \cdot \frac{\color{blue}{\mathsf{fma}\left(y, 2, 1\right)}}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right) \]

      7. associate-*l/ 51.8%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \color{blue}{\left(\frac{\left(a \cdot 2 + 1\right) \cdot b}{16} \cdot t\right)}\right) \]

      8. *-commutative 51.8%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \color{blue}{\left(t \cdot \frac{\left(a \cdot 2 + 1\right) \cdot b}{16}\right)}\right) \]

      9. associate-/l* 51.7%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(t \cdot \color{blue}{\frac{a \cdot 2 + 1}{\frac{16}{b}}}\right)\right) \]

      10. *-commutative 51.7%

          \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(t \cdot \frac{\color{blue}{2 \cdot a} + 1}{\frac{16}{b}}\right)\right) \]

      11. fma-def 51.7%

          \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(t \cdot \frac{\color{blue}{\mathsf{fma}\left(2, a, 1\right)}}{\frac{16}{b}}\right)\right) \]

   3. Simplified 51.7%

      \[\leadsto \color{blue}{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(t \cdot \frac{\mathsf{fma}\left(2, a, 1\right)}{\frac{16}{b}}\right)\right)} \]
   4. Step-by-step derivation

      1. associate-*r/ 52.4%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \color{blue}{\left(\frac{t \cdot \mathsf{fma}\left(2, a, 1\right)}{\frac{16}{b}}\right)}\right) \]

      2. fma-udef 52.4%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \color{blue}{\left(2 \cdot a + 1\right)}}{\frac{16}{b}}\right)\right) \]

      3. *-commutative 52.4%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \left(\color{blue}{a \cdot 2} + 1\right)}{\frac{16}{b}}\right)\right) \]

      4. fma-def 52.4%

         \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \color{blue}{\mathsf{fma}\left(a, 2, 1\right)}}{\frac{16}{b}}\right)\right) \]

   5. Applied egg-rr 52.4%

      \[\leadsto \cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right) \cdot \left(x \cdot \cos \color{blue}{\left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)}\right) \]
   6. Step-by-step derivation

      1. add-cube-cbrt 52.4%

         \[\leadsto \color{blue}{\left(\left(\sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)} \cdot \sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)}\right) \cdot \sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)}\right)} \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right) \]

      2. associate-/r/ 52.9%

         \[\leadsto \left(\left(\sqrt[3]{\cos \left(t \cdot \color{blue}{\left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)}\right)} \cdot \sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)}\right) \cdot \sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right) \]

      3. associate-/r/ 52.5%

         \[\leadsto \left(\left(\sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)} \cdot \sqrt[3]{\cos \left(t \cdot \color{blue}{\left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)}\right)}\right) \cdot \sqrt[3]{\cos \left(t \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{\frac{16}{z}}\right)}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right) \]

      4. associate-/r/ 52.8%

         \[\leadsto \left(\left(\sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)} \cdot \sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)}\right) \cdot \sqrt[3]{\cos \left(t \cdot \color{blue}{\left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)}\right)}\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right) \]

   7. Applied egg-rr 52.8%

      \[\leadsto \color{blue}{\left(\left(\sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)} \cdot \sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)}\right) \cdot \sqrt[3]{\cos \left(t \cdot \left(\frac{\mathsf{fma}\left(y, 2, 1\right)}{16} \cdot z\right)\right)}\right)} \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right) \]

   if 2.0000000000000001e242 < (*.f64 (*.f64 x (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 y 2) 1) z) t) 16))) (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 a 2) 1) b) t) 16)))

   1. Initial program 0.5%

      \[\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]
   2. Step-by-step derivation

      1. associate-*l* 0.5%

         \[\leadsto \color{blue}{x \cdot \left(\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right)} \]

   3. Simplified 2.9%

      \[\leadsto \color{blue}{x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right)} \]

   4. Taylor expanded in z around 0 5.5%

      \[\leadsto x \cdot \left(\color{blue}{1} \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right) \]

   5. Taylor expanded in t around 0 10.5%

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

4. Final simplification 33.2%

   \[\leadsto \begin{array}{l} \mathbf{if}\;\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{t \cdot \left(\left(1 + 2 \cdot a\right) \cdot b\right)}{16}\right) \leq 2 \cdot 10^{+242}:\\ \;\;\;\;\left(\sqrt[3]{\cos \left(t \cdot \left(z \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{16}\right)\right)} \cdot \left(\sqrt[3]{\cos \left(t \cdot \left(z \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{16}\right)\right)} \cdot \sqrt[3]{\cos \left(t \cdot \left(z \cdot \frac{\mathsf{fma}\left(y, 2, 1\right)}{16}\right)\right)}\right)\right) \cdot \left(x \cdot \cos \left(\frac{t \cdot \mathsf{fma}\left(a, 2, 1\right)}{\frac{16}{b}}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]

Alternative 2: 31.9% accurate, 0.5× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{t \cdot \left(\left(1 + 2 \cdot a\right) \cdot b\right)}{16}\right) \leq 2 \cdot 10^{+242}:\\ \;\;\;\;x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(0.0625 \cdot \left(t \cdot b\right) + \left(t \cdot b\right) \cdot \left(a \cdot 0.125\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (if (<=
      (*
       (* x (cos (/ (* (* (+ (* y 2.0) 1.0) z) t) 16.0)))
       (cos (/ (* t (* (+ 1.0 (* 2.0 a)) b)) 16.0)))
      2e+242)
   (*
    x
    (*
     (cos (* (* z t) (+ 0.0625 (/ y 8.0))))
     (cos (+ (* 0.0625 (* t b)) (* (* t b) (* a 0.125))))))
   x))

C

double code(double x, double y, double z, double t, double a, double b) {
	double tmp;
	if (((x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(((t * ((1.0 + (2.0 * a)) * b)) / 16.0))) <= 2e+242) {
		tmp = x * (cos(((z * t) * (0.0625 + (y / 8.0)))) * cos(((0.0625 * (t * b)) + ((t * b) * (a * 0.125)))));
	} else {
		tmp = x;
	}
	return tmp;
}

Fortran

real(8) function code(x, y, z, t, a, b)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8) :: tmp
    if (((x * cos((((((y * 2.0d0) + 1.0d0) * z) * t) / 16.0d0))) * cos(((t * ((1.0d0 + (2.0d0 * a)) * b)) / 16.0d0))) <= 2d+242) then
        tmp = x * (cos(((z * t) * (0.0625d0 + (y / 8.0d0)))) * cos(((0.0625d0 * (t * b)) + ((t * b) * (a * 0.125d0)))))
    else
        tmp = x
    end if
    code = tmp
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	double tmp;
	if (((x * Math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * Math.cos(((t * ((1.0 + (2.0 * a)) * b)) / 16.0))) <= 2e+242) {
		tmp = x * (Math.cos(((z * t) * (0.0625 + (y / 8.0)))) * Math.cos(((0.0625 * (t * b)) + ((t * b) * (a * 0.125)))));
	} else {
		tmp = x;
	}
	return tmp;
}

Python

def code(x, y, z, t, a, b):
	tmp = 0
	if ((x * math.cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * math.cos(((t * ((1.0 + (2.0 * a)) * b)) / 16.0))) <= 2e+242:
		tmp = x * (math.cos(((z * t) * (0.0625 + (y / 8.0)))) * math.cos(((0.0625 * (t * b)) + ((t * b) * (a * 0.125)))))
	else:
		tmp = x
	return tmp

Julia

function code(x, y, z, t, a, b)
	tmp = 0.0
	if (Float64(Float64(x * cos(Float64(Float64(Float64(Float64(Float64(y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(Float64(Float64(t * Float64(Float64(1.0 + Float64(2.0 * a)) * b)) / 16.0))) <= 2e+242)
		tmp = Float64(x * Float64(cos(Float64(Float64(z * t) * Float64(0.0625 + Float64(y / 8.0)))) * cos(Float64(Float64(0.0625 * Float64(t * b)) + Float64(Float64(t * b) * Float64(a * 0.125))))));
	else
		tmp = x;
	end
	return tmp
end

MATLAB

function tmp_2 = code(x, y, z, t, a, b)
	tmp = 0.0;
	if (((x * cos((((((y * 2.0) + 1.0) * z) * t) / 16.0))) * cos(((t * ((1.0 + (2.0 * a)) * b)) / 16.0))) <= 2e+242)
		tmp = x * (cos(((z * t) * (0.0625 + (y / 8.0)))) * cos(((0.0625 * (t * b)) + ((t * b) * (a * 0.125)))));
	else
		tmp = x;
	end
	tmp_2 = tmp;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := If[LessEqual[N[(N[(x * N[Cos[N[(N[(N[(N[(N[(y * 2.0), $MachinePrecision] + 1.0), $MachinePrecision] * z), $MachinePrecision] * t), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Cos[N[(N[(t * N[(N[(1.0 + N[(2.0 * a), $MachinePrecision]), $MachinePrecision] * b), $MachinePrecision]), $MachinePrecision] / 16.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], 2e+242], N[(x * N[(N[Cos[N[(N[(z * t), $MachinePrecision] * N[(0.0625 + N[(y / 8.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * N[Cos[N[(N[(0.0625 * N[(t * b), $MachinePrecision]), $MachinePrecision] + N[(N[(t * b), $MachinePrecision] * N[(a * 0.125), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], x]

Derivation

1. Split input into 2 regimes

2. if (*.f64 (*.f64 x (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 y 2) 1) z) t) 16))) (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 a 2) 1) b) t) 16))) < 2.0000000000000001e242

   1. Initial program 52.2%

      \[\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]
   2. Step-by-step derivation

      1. associate-*l* 52.2%

         \[\leadsto \color{blue}{x \cdot \left(\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right)} \]

   3. Simplified 52.5%

      \[\leadsto \color{blue}{x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right)} \]
   4. Step-by-step derivation

      1. distribute-lft-in 52.5%

         \[\leadsto x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \color{blue}{\left(\left(t \cdot b\right) \cdot 0.0625 + \left(t \cdot b\right) \cdot \frac{a}{8}\right)}\right) \]

      2. div-inv 52.5%

         \[\leadsto x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot 0.0625 + \left(t \cdot b\right) \cdot \color{blue}{\left(a \cdot \frac{1}{8}\right)}\right)\right) \]

      3. metadata-eval 52.5%

         \[\leadsto x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot 0.0625 + \left(t \cdot b\right) \cdot \left(a \cdot \color{blue}{0.125}\right)\right)\right) \]

   5. Applied egg-rr 52.5%

      \[\leadsto x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \color{blue}{\left(\left(t \cdot b\right) \cdot 0.0625 + \left(t \cdot b\right) \cdot \left(a \cdot 0.125\right)\right)}\right) \]

   if 2.0000000000000001e242 < (*.f64 (*.f64 x (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 y 2) 1) z) t) 16))) (cos.f64 (/.f64 (*.f64 (*.f64 (+.f64 (*.f64 a 2) 1) b) t) 16)))

   1. Initial program 0.5%

      \[\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]
   2. Step-by-step derivation

      1. associate-*l* 0.5%

         \[\leadsto \color{blue}{x \cdot \left(\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right)} \]

   3. Simplified 2.9%

      \[\leadsto \color{blue}{x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right)} \]

   4. Taylor expanded in z around 0 5.5%

      \[\leadsto x \cdot \left(\color{blue}{1} \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right) \]

   5. Taylor expanded in t around 0 10.5%

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

4. Final simplification 33.0%

   \[\leadsto \begin{array}{l} \mathbf{if}\;\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{t \cdot \left(\left(1 + 2 \cdot a\right) \cdot b\right)}{16}\right) \leq 2 \cdot 10^{+242}:\\ \;\;\;\;x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(0.0625 \cdot \left(t \cdot b\right) + \left(t \cdot b\right) \cdot \left(a \cdot 0.125\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]

Alternative 3: 30.8% accurate, 225.0× speedup

Math

\[\begin{array}{l} \\ x \end{array} \]

FPCore

(FPCore (x y z t a b) :precision binary64 x)

C

double code(double x, double y, double z, double t, double a, double b) {
	return x;
}

Fortran

real(8) function code(x, y, z, t, a, b)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = x
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return x;
}

Python

def code(x, y, z, t, a, b):
	return x

Julia

function code(x, y, z, t, a, b)
	return x
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = x;
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := x

Derivation

1. Initial program 28.2%

   \[\left(x \cdot \cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right)\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right) \]
2. Step-by-step derivation

   1. associate-*l* 28.2%

      \[\leadsto \color{blue}{x \cdot \left(\cos \left(\frac{\left(\left(y \cdot 2 + 1\right) \cdot z\right) \cdot t}{16}\right) \cdot \cos \left(\frac{\left(\left(a \cdot 2 + 1\right) \cdot b\right) \cdot t}{16}\right)\right)} \]

3. Simplified 29.4%

   \[\leadsto \color{blue}{x \cdot \left(\cos \left(\left(z \cdot t\right) \cdot \left(0.0625 + \frac{y}{8}\right)\right) \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right)} \]

4. Taylor expanded in z around 0 29.6%

   \[\leadsto x \cdot \left(\color{blue}{1} \cdot \cos \left(\left(t \cdot b\right) \cdot \left(0.0625 + \frac{a}{8}\right)\right)\right) \]

5. Taylor expanded in t around 0 30.7%

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

6. Final simplification 30.7%

   \[\leadsto x \]

Developer target: 30.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ x \cdot \cos \left(\frac{b}{16} \cdot \frac{t}{\left(1 - a \cdot 2\right) + {\left(a \cdot 2\right)}^{2}}\right) \end{array} \]

FPCore

(FPCore (x y z t a b)
 :precision binary64
 (* x (cos (* (/ b 16.0) (/ t (+ (- 1.0 (* a 2.0)) (pow (* a 2.0) 2.0)))))))

C

double code(double x, double y, double z, double t, double a, double b) {
	return x * cos(((b / 16.0) * (t / ((1.0 - (a * 2.0)) + pow((a * 2.0), 2.0)))));
}

Fortran

real(8) function code(x, y, z, t, a, b)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = x * cos(((b / 16.0d0) * (t / ((1.0d0 - (a * 2.0d0)) + ((a * 2.0d0) ** 2.0d0)))))
end function

Java

public static double code(double x, double y, double z, double t, double a, double b) {
	return x * Math.cos(((b / 16.0) * (t / ((1.0 - (a * 2.0)) + Math.pow((a * 2.0), 2.0)))));
}

Python

def code(x, y, z, t, a, b):
	return x * math.cos(((b / 16.0) * (t / ((1.0 - (a * 2.0)) + math.pow((a * 2.0), 2.0)))))

Julia

function code(x, y, z, t, a, b)
	return Float64(x * cos(Float64(Float64(b / 16.0) * Float64(t / Float64(Float64(1.0 - Float64(a * 2.0)) + (Float64(a * 2.0) ^ 2.0))))))
end

MATLAB

function tmp = code(x, y, z, t, a, b)
	tmp = x * cos(((b / 16.0) * (t / ((1.0 - (a * 2.0)) + ((a * 2.0) ^ 2.0)))));
end

Wolfram

code[x_, y_, z_, t_, a_, b_] := N[(x * N[Cos[N[(N[(b / 16.0), $MachinePrecision] * N[(t / N[(N[(1.0 - N[(a * 2.0), $MachinePrecision]), $MachinePrecision] + N[Power[N[(a * 2.0), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]

Reproduce

herbie shell --seed 2023196 
(FPCore (x y z t a b)
  :name "Codec.Picture.Jpg.FastDct:referenceDct from JuicyPixels-3.2.6.1"
  :precision binary64

  :herbie-target
  (* x (cos (* (/ b 16.0) (/ t (+ (- 1.0 (* a 2.0)) (pow (* a 2.0) 2.0))))))

  (* (* x (cos (/ (* (* (+ (* y 2.0) 1.0) z) t) 16.0))) (cos (/ (* (* (+ (* a 2.0) 1.0) b) t) 16.0))))