
(FPCore (x y z t) :precision binary64 (* (/ 1.0 3.0) (acos (* (/ (* 3.0 (/ x (* y 27.0))) (* z 2.0)) (sqrt t)))))
double code(double x, double y, double z, double t) {
return (1.0 / 3.0) * acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * sqrt(t)));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = (1.0d0 / 3.0d0) * acos((((3.0d0 * (x / (y * 27.0d0))) / (z * 2.0d0)) * sqrt(t)))
end function
public static double code(double x, double y, double z, double t) {
return (1.0 / 3.0) * Math.acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * Math.sqrt(t)));
}
def code(x, y, z, t): return (1.0 / 3.0) * math.acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * math.sqrt(t)))
function code(x, y, z, t) return Float64(Float64(1.0 / 3.0) * acos(Float64(Float64(Float64(3.0 * Float64(x / Float64(y * 27.0))) / Float64(z * 2.0)) * sqrt(t)))) end
function tmp = code(x, y, z, t) tmp = (1.0 / 3.0) * acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * sqrt(t))); end
code[x_, y_, z_, t_] := N[(N[(1.0 / 3.0), $MachinePrecision] * N[ArcCos[N[(N[(N[(3.0 * N[(x / N[(y * 27.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(z * 2.0), $MachinePrecision]), $MachinePrecision] * N[Sqrt[t], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{3} \cdot \cos^{-1} \left(\frac{3 \cdot \frac{x}{y \cdot 27}}{z \cdot 2} \cdot \sqrt{t}\right)
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 3 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t) :precision binary64 (* (/ 1.0 3.0) (acos (* (/ (* 3.0 (/ x (* y 27.0))) (* z 2.0)) (sqrt t)))))
double code(double x, double y, double z, double t) {
return (1.0 / 3.0) * acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * sqrt(t)));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = (1.0d0 / 3.0d0) * acos((((3.0d0 * (x / (y * 27.0d0))) / (z * 2.0d0)) * sqrt(t)))
end function
public static double code(double x, double y, double z, double t) {
return (1.0 / 3.0) * Math.acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * Math.sqrt(t)));
}
def code(x, y, z, t): return (1.0 / 3.0) * math.acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * math.sqrt(t)))
function code(x, y, z, t) return Float64(Float64(1.0 / 3.0) * acos(Float64(Float64(Float64(3.0 * Float64(x / Float64(y * 27.0))) / Float64(z * 2.0)) * sqrt(t)))) end
function tmp = code(x, y, z, t) tmp = (1.0 / 3.0) * acos((((3.0 * (x / (y * 27.0))) / (z * 2.0)) * sqrt(t))); end
code[x_, y_, z_, t_] := N[(N[(1.0 / 3.0), $MachinePrecision] * N[ArcCos[N[(N[(N[(3.0 * N[(x / N[(y * 27.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(z * 2.0), $MachinePrecision]), $MachinePrecision] * N[Sqrt[t], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{3} \cdot \cos^{-1} \left(\frac{3 \cdot \frac{x}{y \cdot 27}}{z \cdot 2} \cdot \sqrt{t}\right)
\end{array}
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (fma (cbrt (* PI (* PI PI))) 0.16666666666666666 (* (asin (/ (sqrt t) (/ y (/ 0.05555555555555555 (/ z x))))) -0.3333333333333333)))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return fma(cbrt((((double) M_PI) * (((double) M_PI) * ((double) M_PI)))), 0.16666666666666666, (asin((sqrt(t) / (y / (0.05555555555555555 / (z / x))))) * -0.3333333333333333));
}
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return fma(cbrt(Float64(pi * Float64(pi * pi))), 0.16666666666666666, Float64(asin(Float64(sqrt(t) / Float64(y / Float64(0.05555555555555555 / Float64(z / x))))) * -0.3333333333333333)) end
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. code[x_, y_, z_, t_] := N[(N[Power[N[(Pi * N[(Pi * Pi), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] * 0.16666666666666666 + N[(N[ArcSin[N[(N[Sqrt[t], $MachinePrecision] / N[(y / N[(0.05555555555555555 / N[(z / x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * -0.3333333333333333), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\mathsf{fma}\left(\sqrt[3]{\pi \cdot \left(\pi \cdot \pi\right)}, 0.16666666666666666, \sin^{-1} \left(\frac{\sqrt{t}}{\frac{y}{\frac{0.05555555555555555}{\frac{z}{x}}}}\right) \cdot -0.3333333333333333\right)
\end{array}
Initial program 98.5%
*-lowering-*.f64N/A
metadata-evalN/A
acos-lowering-acos.f64N/A
associate-*l/N/A
*-commutativeN/A
associate-*r/N/A
*-commutativeN/A
times-fracN/A
associate-*l*N/A
times-fracN/A
associate-*r/N/A
*-lowering-*.f64N/A
metadata-evalN/A
metadata-evalN/A
associate-*l/N/A
associate-/l*N/A
*-commutativeN/A
associate-*r/N/A
Simplified96.0%
*-commutativeN/A
div-invN/A
associate-*l*N/A
*-commutativeN/A
associate-/l*N/A
associate-*l*N/A
*-lowering-*.f64N/A
sqrt-lowering-sqrt.f64N/A
*-lowering-*.f64N/A
/-lowering-/.f64N/A
associate-*l/N/A
metadata-evalN/A
/-lowering-/.f6498.1%
Applied egg-rr98.1%
Applied egg-rr98.1%
add-cbrt-cubeN/A
associate-*r*N/A
cbrt-lowering-cbrt.f64N/A
*-lowering-*.f64N/A
PI-lowering-PI.f64N/A
*-lowering-*.f64N/A
PI-lowering-PI.f64N/A
PI-lowering-PI.f6499.6%
Applied egg-rr99.6%
distribute-rgt-neg-inN/A
metadata-evalN/A
*-lowering-*.f64N/A
Applied egg-rr99.6%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (acos (* (sqrt t) (* (/ x z) (/ 0.05555555555555555 y))))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((sqrt(t) * ((x / z) * (0.05555555555555555 / y))));
}
NOTE: x, y, z, and t should be sorted in increasing order before calling this function.
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = 0.3333333333333333d0 * acos((sqrt(t) * ((x / z) * (0.05555555555555555d0 / y))))
end function
assert x < y && y < z && z < t;
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.acos((Math.sqrt(t) * ((x / z) * (0.05555555555555555 / y))));
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos((math.sqrt(t) * ((x / z) * (0.05555555555555555 / y))))
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(sqrt(t) * Float64(Float64(x / z) * Float64(0.05555555555555555 / y))))) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos((sqrt(t) * ((x / z) * (0.05555555555555555 / y))));
end
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[ArcCos[N[(N[Sqrt[t], $MachinePrecision] * N[(N[(x / z), $MachinePrecision] * N[(0.05555555555555555 / y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
0.3333333333333333 \cdot \cos^{-1} \left(\sqrt{t} \cdot \left(\frac{x}{z} \cdot \frac{0.05555555555555555}{y}\right)\right)
\end{array}
Initial program 98.5%
*-lowering-*.f64N/A
metadata-evalN/A
acos-lowering-acos.f64N/A
associate-*l/N/A
*-commutativeN/A
associate-*r/N/A
*-commutativeN/A
times-fracN/A
associate-*l*N/A
times-fracN/A
associate-*r/N/A
*-lowering-*.f64N/A
metadata-evalN/A
metadata-evalN/A
associate-*l/N/A
associate-/l*N/A
*-commutativeN/A
associate-*r/N/A
Simplified96.0%
*-commutativeN/A
div-invN/A
associate-*l*N/A
*-commutativeN/A
associate-/l*N/A
associate-*l*N/A
*-lowering-*.f64N/A
sqrt-lowering-sqrt.f64N/A
*-lowering-*.f64N/A
/-lowering-/.f64N/A
associate-*l/N/A
metadata-evalN/A
/-lowering-/.f6498.1%
Applied egg-rr98.1%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (acos (* 0.05555555555555555 (/ (/ (* (sqrt t) x) z) y)))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((0.05555555555555555 * (((sqrt(t) * x) / z) / y)));
}
NOTE: x, y, z, and t should be sorted in increasing order before calling this function.
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = 0.3333333333333333d0 * acos((0.05555555555555555d0 * (((sqrt(t) * x) / z) / y)))
end function
assert x < y && y < z && z < t;
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.acos((0.05555555555555555 * (((Math.sqrt(t) * x) / z) / y)));
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos((0.05555555555555555 * (((math.sqrt(t) * x) / z) / y)))
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(0.05555555555555555 * Float64(Float64(Float64(sqrt(t) * x) / z) / y)))) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos((0.05555555555555555 * (((sqrt(t) * x) / z) / y)));
end
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[ArcCos[N[(0.05555555555555555 * N[(N[(N[(N[Sqrt[t], $MachinePrecision] * x), $MachinePrecision] / z), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
0.3333333333333333 \cdot \cos^{-1} \left(0.05555555555555555 \cdot \frac{\frac{\sqrt{t} \cdot x}{z}}{y}\right)
\end{array}
Initial program 98.5%
*-lowering-*.f64N/A
metadata-evalN/A
acos-lowering-acos.f64N/A
associate-*l/N/A
*-commutativeN/A
associate-*r/N/A
*-commutativeN/A
times-fracN/A
associate-*l*N/A
times-fracN/A
associate-*r/N/A
*-lowering-*.f64N/A
metadata-evalN/A
metadata-evalN/A
associate-*l/N/A
associate-/l*N/A
*-commutativeN/A
associate-*r/N/A
Simplified96.0%
Final simplification96.0%
(FPCore (x y z t) :precision binary64 (/ (acos (* (/ (/ x 27.0) (* y z)) (/ (sqrt t) (/ 2.0 3.0)))) 3.0))
double code(double x, double y, double z, double t) {
return acos((((x / 27.0) / (y * z)) * (sqrt(t) / (2.0 / 3.0)))) / 3.0;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = acos((((x / 27.0d0) / (y * z)) * (sqrt(t) / (2.0d0 / 3.0d0)))) / 3.0d0
end function
public static double code(double x, double y, double z, double t) {
return Math.acos((((x / 27.0) / (y * z)) * (Math.sqrt(t) / (2.0 / 3.0)))) / 3.0;
}
def code(x, y, z, t): return math.acos((((x / 27.0) / (y * z)) * (math.sqrt(t) / (2.0 / 3.0)))) / 3.0
function code(x, y, z, t) return Float64(acos(Float64(Float64(Float64(x / 27.0) / Float64(y * z)) * Float64(sqrt(t) / Float64(2.0 / 3.0)))) / 3.0) end
function tmp = code(x, y, z, t) tmp = acos((((x / 27.0) / (y * z)) * (sqrt(t) / (2.0 / 3.0)))) / 3.0; end
code[x_, y_, z_, t_] := N[(N[ArcCos[N[(N[(N[(x / 27.0), $MachinePrecision] / N[(y * z), $MachinePrecision]), $MachinePrecision] * N[(N[Sqrt[t], $MachinePrecision] / N[(2.0 / 3.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] / 3.0), $MachinePrecision]
\begin{array}{l}
\\
\frac{\cos^{-1} \left(\frac{\frac{x}{27}}{y \cdot z} \cdot \frac{\sqrt{t}}{\frac{2}{3}}\right)}{3}
\end{array}
herbie shell --seed 2024161
(FPCore (x y z t)
:name "Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, D"
:precision binary64
:alt
(! :herbie-platform default (/ (acos (* (/ (/ x 27) (* y z)) (/ (sqrt t) (/ 2 3)))) 3))
(* (/ 1.0 3.0) (acos (* (/ (* 3.0 (/ x (* y 27.0))) (* z 2.0)) (sqrt t)))))