
(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}
(FPCore (x y z t) :precision binary64 (+ -1.0 (fma 0.3333333333333333 (acos (* (/ (/ x y) z) (* 0.05555555555555555 (sqrt t)))) 1.0)))
double code(double x, double y, double z, double t) {
return -1.0 + fma(0.3333333333333333, acos((((x / y) / z) * (0.05555555555555555 * sqrt(t)))), 1.0);
}
function code(x, y, z, t) return Float64(-1.0 + fma(0.3333333333333333, acos(Float64(Float64(Float64(x / y) / z) * Float64(0.05555555555555555 * sqrt(t)))), 1.0)) end
code[x_, y_, z_, t_] := N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[N[(N[(N[(x / y), $MachinePrecision] / z), $MachinePrecision] * N[(0.05555555555555555 * N[Sqrt[t], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} \left(\frac{\frac{x}{y}}{z} \cdot \left(0.05555555555555555 \cdot \sqrt{t}\right)\right), 1\right)
\end{array}
Initial program 98.5%
Simplified98.5%
Taylor expanded in x around 0 97.7%
associate-*r/97.7%
*-commutative97.7%
Simplified97.7%
expm1-log1p-u97.7%
expm1-undefine99.1%
clear-num99.1%
associate-*l/99.1%
*-un-lft-identity99.1%
*-commutative99.1%
times-frac98.6%
Applied egg-rr98.6%
sub-neg98.6%
metadata-eval98.6%
+-commutative98.6%
log1p-undefine96.2%
rem-exp-log96.2%
+-commutative96.2%
fma-define98.6%
Simplified100.0%
(FPCore (x y z t) :precision binary64 (+ -1.0 (fma 0.3333333333333333 (acos 0.0) 1.0)))
double code(double x, double y, double z, double t) {
return -1.0 + fma(0.3333333333333333, acos(0.0), 1.0);
}
function code(x, y, z, t) return Float64(-1.0 + fma(0.3333333333333333, acos(0.0), 1.0)) end
code[x_, y_, z_, t_] := N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[0.0], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} 0, 1\right)
\end{array}
Initial program 98.5%
Simplified98.5%
Taylor expanded in x around 0 97.7%
associate-*r/97.7%
*-commutative97.7%
Simplified97.7%
associate-*l/97.7%
expm1-log1p-u97.7%
associate-*r*97.7%
expm1-undefine97.7%
associate-*r*97.7%
associate-*l/97.7%
clear-num97.7%
associate-*l/97.7%
*-un-lft-identity97.7%
*-commutative97.7%
times-frac97.1%
Applied egg-rr97.1%
sub-neg97.1%
metadata-eval97.1%
+-commutative97.1%
log1p-undefine97.1%
rem-exp-log97.1%
+-commutative97.1%
associate-*r/97.1%
*-commutative97.1%
associate-/r/97.1%
*-commutative97.1%
associate-/l*97.1%
associate-*r/97.7%
associate-/r/97.7%
/-rgt-identity97.7%
times-frac96.9%
*-rgt-identity96.9%
associate-*r/97.7%
associate-*r*97.7%
Simplified98.5%
Taylor expanded in x around 0 96.5%
expm1-log1p-u96.5%
expm1-undefine98.0%
metadata-eval98.0%
Applied egg-rr98.0%
sub-neg98.0%
metadata-eval98.0%
+-commutative98.0%
log1p-undefine95.6%
rem-exp-log95.6%
+-commutative95.6%
fma-define98.0%
Simplified98.0%
(FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (acos 0.0)))
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos(0.0);
}
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 = 0.3333333333333333d0 * acos(0.0d0)
end function
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.acos(0.0);
}
def code(x, y, z, t): return 0.3333333333333333 * math.acos(0.0)
function code(x, y, z, t) return Float64(0.3333333333333333 * acos(0.0)) end
function tmp = code(x, y, z, t) tmp = 0.3333333333333333 * acos(0.0); end
code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[ArcCos[0.0], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.3333333333333333 \cdot \cos^{-1} 0
\end{array}
Initial program 98.5%
Simplified98.5%
Taylor expanded in x around 0 97.7%
associate-*r/97.7%
*-commutative97.7%
Simplified97.7%
associate-*l/97.7%
expm1-log1p-u97.7%
associate-*r*97.7%
expm1-undefine97.7%
associate-*r*97.7%
associate-*l/97.7%
clear-num97.7%
associate-*l/97.7%
*-un-lft-identity97.7%
*-commutative97.7%
times-frac97.1%
Applied egg-rr97.1%
sub-neg97.1%
metadata-eval97.1%
+-commutative97.1%
log1p-undefine97.1%
rem-exp-log97.1%
+-commutative97.1%
associate-*r/97.1%
*-commutative97.1%
associate-/r/97.1%
*-commutative97.1%
associate-/l*97.1%
associate-*r/97.7%
associate-/r/97.7%
/-rgt-identity97.7%
times-frac96.9%
*-rgt-identity96.9%
associate-*r/97.7%
associate-*r*97.7%
Simplified98.5%
Taylor expanded in x around 0 96.5%
pow196.5%
metadata-eval96.5%
Applied egg-rr96.5%
unpow196.5%
Simplified96.5%
(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 2024137
(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)))))