
(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 (+ (* (+ (acos (* (sqrt t) (* (/ 0.05555555555555555 y) (/ x z)))) 1.0) 0.3333333333333333) -0.3333333333333333))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return ((acos((sqrt(t) * ((0.05555555555555555 / y) * (x / z)))) + 1.0) * 0.3333333333333333) + -0.3333333333333333;
}
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 = ((acos((sqrt(t) * ((0.05555555555555555d0 / y) * (x / z)))) + 1.0d0) * 0.3333333333333333d0) + (-0.3333333333333333d0)
end function
assert x < y && y < z && z < t;
public static double code(double x, double y, double z, double t) {
return ((Math.acos((Math.sqrt(t) * ((0.05555555555555555 / y) * (x / z)))) + 1.0) * 0.3333333333333333) + -0.3333333333333333;
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return ((math.acos((math.sqrt(t) * ((0.05555555555555555 / y) * (x / z)))) + 1.0) * 0.3333333333333333) + -0.3333333333333333
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(Float64(Float64(acos(Float64(sqrt(t) * Float64(Float64(0.05555555555555555 / y) * Float64(x / z)))) + 1.0) * 0.3333333333333333) + -0.3333333333333333) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = ((acos((sqrt(t) * ((0.05555555555555555 / y) * (x / z)))) + 1.0) * 0.3333333333333333) + -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[(N[(N[ArcCos[N[(N[Sqrt[t], $MachinePrecision] * N[(N[(0.05555555555555555 / y), $MachinePrecision] * N[(x / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] + 1.0), $MachinePrecision] * 0.3333333333333333), $MachinePrecision] + -0.3333333333333333), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\left(\cos^{-1} \left(\sqrt{t} \cdot \left(\frac{0.05555555555555555}{y} \cdot \frac{x}{z}\right)\right) + 1\right) \cdot 0.3333333333333333 + -0.3333333333333333
\end{array}
Initial program 97.5%
Simplified97.5%
add-cbrt-cube99.0%
pow399.0%
*-commutative99.0%
associate-*l*99.0%
associate-/l/99.0%
*-commutative99.0%
Applied egg-rr99.0%
div-inv98.6%
Applied egg-rr98.6%
associate-*r/99.0%
*-rgt-identity99.0%
associate-/r*99.0%
Simplified99.0%
rem-cbrt-cube97.5%
associate-/r*97.5%
associate-*l/96.6%
associate-*r/97.5%
+-rgt-identity97.5%
metadata-eval97.5%
metadata-eval97.5%
associate-+l+97.5%
distribute-rgt-in98.9%
associate-*r/98.0%
associate-*r*98.0%
metadata-eval98.0%
metadata-eval98.0%
Applied egg-rr98.0%
Taylor expanded in x around 0 98.9%
associate-*r*98.9%
*-commutative98.9%
associate-*l*98.9%
associate-/l*98.9%
times-frac99.3%
Simplified99.3%
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) (/ (* 0.05555555555555555 x) (* y z))))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((sqrt(t) * ((0.05555555555555555 * x) / (y * z))));
}
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) * ((0.05555555555555555d0 * x) / (y * z))))
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) * ((0.05555555555555555 * x) / (y * z))));
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos((math.sqrt(t) * ((0.05555555555555555 * x) / (y * z))))
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(0.05555555555555555 * x) / Float64(y * z))))) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos((sqrt(t) * ((0.05555555555555555 * x) / (y * z))));
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[(0.05555555555555555 * x), $MachinePrecision] / N[(y * z), $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 \frac{0.05555555555555555 \cdot x}{y \cdot z}\right)
\end{array}
Initial program 97.5%
Simplified97.5%
*-commutative97.5%
associate-/l/97.5%
associate-*l/97.5%
*-commutative97.5%
Applied egg-rr97.5%
Final simplification97.5%
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) (* 0.05555555555555555 (/ (/ x y) z))))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((sqrt(t) * (0.05555555555555555 * ((x / y) / z))));
}
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) * (0.05555555555555555d0 * ((x / y) / z))))
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) * (0.05555555555555555 * ((x / y) / z))));
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos((math.sqrt(t) * (0.05555555555555555 * ((x / y) / z))))
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(sqrt(t) * Float64(0.05555555555555555 * Float64(Float64(x / y) / z))))) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos((sqrt(t) * (0.05555555555555555 * ((x / y) / z))));
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[(0.05555555555555555 * N[(N[(x / y), $MachinePrecision] / z), $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(0.05555555555555555 \cdot \frac{\frac{x}{y}}{z}\right)\right)
\end{array}
Initial program 97.5%
Simplified97.5%
Final simplification97.5%
(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 2024185
(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)))))