
(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 6 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
(let* ((t_1 (sqrt (PI))))
(fma
(PI)
0.16666666666666666
(*
(fma
(* t_1 0.5)
t_1
(- (acos (* (* x (/ (/ (sqrt t) z) y)) 0.05555555555555555))))
-0.3333333333333333))))\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\begin{array}{l}
t_1 := \sqrt{\mathsf{PI}\left(\right)}\\
\mathsf{fma}\left(\mathsf{PI}\left(\right), 0.16666666666666666, \mathsf{fma}\left(t\_1 \cdot 0.5, t\_1, -\cos^{-1} \left(\left(x \cdot \frac{\frac{\sqrt{t}}{z}}{y}\right) \cdot 0.05555555555555555\right)\right) \cdot -0.3333333333333333\right)
\end{array}
\end{array}
Initial program 98.4%
Applied rewrites98.5%
Applied rewrites98.1%
lift-asin.f64N/A
asin-acosN/A
lift-*.f64N/A
lift-*.f64N/A
*-commutativeN/A
lift-/.f64N/A
lift-/.f64N/A
associate-/l/N/A
lift-*.f64N/A
lift-/.f64N/A
lift-*.f64N/A
*-commutativeN/A
lift-*.f64N/A
lift-acos.f64N/A
sub-negN/A
Applied rewrites99.6%
Final simplification99.6%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function.
(FPCore (x y z t)
:precision binary64
(let* ((t_1 (sqrt (PI))))
(fma
(* -0.16666666666666666 t_1)
t_1
(fma
0.3333333333333333
(acos (* (* x (/ (/ (sqrt t) z) y)) 0.05555555555555555))
(* 0.16666666666666666 (PI))))))\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\begin{array}{l}
t_1 := \sqrt{\mathsf{PI}\left(\right)}\\
\mathsf{fma}\left(-0.16666666666666666 \cdot t\_1, t\_1, \mathsf{fma}\left(0.3333333333333333, \cos^{-1} \left(\left(x \cdot \frac{\frac{\sqrt{t}}{z}}{y}\right) \cdot 0.05555555555555555\right), 0.16666666666666666 \cdot \mathsf{PI}\left(\right)\right)\right)
\end{array}
\end{array}
Initial program 98.4%
Applied rewrites98.5%
Applied rewrites98.1%
lift-*.f64N/A
*-commutativeN/A
lift-/.f64N/A
lift-/.f64N/A
associate-/l/N/A
lift-*.f64N/A
associate-*l/N/A
lower-/.f64N/A
*-commutativeN/A
lower-*.f6496.5
lift-*.f64N/A
*-commutativeN/A
lower-*.f6496.5
Applied rewrites96.5%
Applied rewrites99.6%
Final simplification99.6%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function.
(FPCore (x y z t)
:precision binary64
(let* ((t_1 (sqrt (PI))))
(fma
(PI)
0.16666666666666666
(*
(fma
(* t_1 0.5)
t_1
(- (acos (* (* (/ (sqrt t) (* y z)) x) 0.05555555555555555))))
-0.3333333333333333))))\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\begin{array}{l}
t_1 := \sqrt{\mathsf{PI}\left(\right)}\\
\mathsf{fma}\left(\mathsf{PI}\left(\right), 0.16666666666666666, \mathsf{fma}\left(t\_1 \cdot 0.5, t\_1, -\cos^{-1} \left(\left(\frac{\sqrt{t}}{y \cdot z} \cdot x\right) \cdot 0.05555555555555555\right)\right) \cdot -0.3333333333333333\right)
\end{array}
\end{array}
Initial program 98.4%
Applied rewrites98.5%
Applied rewrites98.1%
lift-asin.f64N/A
asin-acosN/A
lift-*.f64N/A
lift-*.f64N/A
*-commutativeN/A
lift-/.f64N/A
lift-/.f64N/A
associate-/l/N/A
lift-*.f64N/A
lift-/.f64N/A
lift-*.f64N/A
*-commutativeN/A
lift-*.f64N/A
lift-acos.f64N/A
sub-negN/A
Applied rewrites99.6%
lift-/.f64N/A
lift-/.f64N/A
associate-/r*N/A
lift-*.f64N/A
lower-/.f6499.1
lift-*.f64N/A
*-commutativeN/A
lower-*.f6499.1
Applied rewrites99.1%
Final simplification99.1%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (fma (PI) 0.16666666666666666 (* (asin (* (* x (/ (/ (sqrt t) z) y)) 0.05555555555555555)) -0.3333333333333333)))
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\mathsf{fma}\left(\mathsf{PI}\left(\right), 0.16666666666666666, \sin^{-1} \left(\left(x \cdot \frac{\frac{\sqrt{t}}{z}}{y}\right) \cdot 0.05555555555555555\right) \cdot -0.3333333333333333\right)
\end{array}
Initial program 98.4%
Applied rewrites98.5%
Applied rewrites98.1%
Final simplification98.1%
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 (* (* x (/ (/ (sqrt t) z) y)) 0.05555555555555555))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos(((x * ((sqrt(t) / z) / y)) * 0.05555555555555555));
}
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(((x * ((sqrt(t) / z) / y)) * 0.05555555555555555d0))
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(((x * ((Math.sqrt(t) / z) / y)) * 0.05555555555555555));
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos(((x * ((math.sqrt(t) / z) / y)) * 0.05555555555555555))
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(Float64(x * Float64(Float64(sqrt(t) / z) / y)) * 0.05555555555555555))) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos(((x * ((sqrt(t) / z) / y)) * 0.05555555555555555));
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[(x * N[(N[(N[Sqrt[t], $MachinePrecision] / z), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision] * 0.05555555555555555), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
0.3333333333333333 \cdot \cos^{-1} \left(\left(x \cdot \frac{\frac{\sqrt{t}}{z}}{y}\right) \cdot 0.05555555555555555\right)
\end{array}
Initial program 98.4%
Taylor expanded in t around 0
*-commutativeN/A
lower-*.f64N/A
Applied rewrites98.1%
Final simplification98.1%
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) (* y z)) x) 0.05555555555555555)) 0.3333333333333333))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return acos((((sqrt(t) / (y * z)) * x) * 0.05555555555555555)) * 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) / (y * z)) * x) * 0.05555555555555555d0)) * 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) / (y * z)) * x) * 0.05555555555555555)) * 0.3333333333333333;
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return math.acos((((math.sqrt(t) / (y * z)) * x) * 0.05555555555555555)) * 0.3333333333333333
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(acos(Float64(Float64(Float64(sqrt(t) / Float64(y * z)) * x) * 0.05555555555555555)) * 0.3333333333333333) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = acos((((sqrt(t) / (y * z)) * x) * 0.05555555555555555)) * 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[ArcCos[N[(N[(N[(N[Sqrt[t], $MachinePrecision] / N[(y * z), $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision] * 0.05555555555555555), $MachinePrecision]], $MachinePrecision] * 0.3333333333333333), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
\cos^{-1} \left(\left(\frac{\sqrt{t}}{y \cdot z} \cdot x\right) \cdot 0.05555555555555555\right) \cdot 0.3333333333333333
\end{array}
Initial program 98.4%
Taylor expanded in t around 0
*-commutativeN/A
lower-*.f64N/A
Applied rewrites98.1%
Applied rewrites97.5%
(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 2024273
(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)))))