
(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}
(FPCore (x y z t)
:precision binary64
(if (<= (sqrt t) 5e-85)
(+
-1.0
(fma
0.3333333333333333
(acos (* 0.05555555555555555 (* (/ x y) (/ (sqrt t) z))))
1.0))
(+
-1.0
(fma
0.3333333333333333
(acos (* 0.05555555555555555 (* x (/ (sqrt t) (* z y)))))
1.0))))
double code(double x, double y, double z, double t) {
double tmp;
if (sqrt(t) <= 5e-85) {
tmp = -1.0 + fma(0.3333333333333333, acos((0.05555555555555555 * ((x / y) * (sqrt(t) / z)))), 1.0);
} else {
tmp = -1.0 + fma(0.3333333333333333, acos((0.05555555555555555 * (x * (sqrt(t) / (z * y))))), 1.0);
}
return tmp;
}
function code(x, y, z, t) tmp = 0.0 if (sqrt(t) <= 5e-85) tmp = Float64(-1.0 + fma(0.3333333333333333, acos(Float64(0.05555555555555555 * Float64(Float64(x / y) * Float64(sqrt(t) / z)))), 1.0)); else tmp = Float64(-1.0 + fma(0.3333333333333333, acos(Float64(0.05555555555555555 * Float64(x * Float64(sqrt(t) / Float64(z * y))))), 1.0)); end return tmp end
code[x_, y_, z_, t_] := If[LessEqual[N[Sqrt[t], $MachinePrecision], 5e-85], N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[N[(0.05555555555555555 * N[(N[(x / y), $MachinePrecision] * N[(N[Sqrt[t], $MachinePrecision] / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision], N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[N[(0.05555555555555555 * N[(x * N[(N[Sqrt[t], $MachinePrecision] / N[(z * y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;\sqrt{t} \leq 5 \cdot 10^{-85}:\\
\;\;\;\;-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} \left(0.05555555555555555 \cdot \left(\frac{x}{y} \cdot \frac{\sqrt{t}}{z}\right)\right), 1\right)\\
\mathbf{else}:\\
\;\;\;\;-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} \left(0.05555555555555555 \cdot \left(x \cdot \frac{\sqrt{t}}{z \cdot y}\right)\right), 1\right)\\
\end{array}
\end{array}
if (sqrt.f64 t) < 5.0000000000000002e-85Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/92.6%
associate-*l/92.6%
*-commutative92.6%
Applied egg-rr92.6%
associate-*l/92.6%
associate-*r*92.6%
expm1-log1p-u92.6%
expm1-undefine94.0%
Applied egg-rr98.5%
sub-neg98.5%
metadata-eval98.5%
+-commutative98.5%
log1p-undefine96.1%
rem-exp-log96.1%
+-commutative96.1%
fma-define98.5%
Simplified94.0%
Taylor expanded in t around 0 91.7%
associate-*r/91.7%
*-commutative91.7%
*-commutative91.7%
associate-*r/91.7%
+-commutative91.7%
fma-define94.0%
associate-*r/94.0%
*-commutative94.0%
times-frac100.0%
Simplified100.0%
if 5.0000000000000002e-85 < (sqrt.f64 t) Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/98.5%
associate-*l/98.5%
*-commutative98.5%
Applied egg-rr98.5%
associate-*l/98.5%
associate-*r*98.5%
expm1-log1p-u98.5%
expm1-undefine99.9%
Applied egg-rr99.5%
sub-neg99.5%
metadata-eval99.5%
+-commutative99.5%
log1p-undefine97.2%
rem-exp-log97.2%
+-commutative97.2%
fma-define99.5%
Simplified100.0%
Final simplification100.0%
(FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (cbrt (pow (acos (* (sqrt t) (/ 0.05555555555555555 (* z (/ y x))))) 3.0))))
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * cbrt(pow(acos((sqrt(t) * (0.05555555555555555 / (z * (y / x))))), 3.0));
}
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.cbrt(Math.pow(Math.acos((Math.sqrt(t) * (0.05555555555555555 / (z * (y / x))))), 3.0));
}
function code(x, y, z, t) return Float64(0.3333333333333333 * cbrt((acos(Float64(sqrt(t) * Float64(0.05555555555555555 / Float64(z * Float64(y / x))))) ^ 3.0))) end
code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[Power[N[Power[N[ArcCos[N[(N[Sqrt[t], $MachinePrecision] * N[(0.05555555555555555 / N[(z * N[(y / x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision], 3.0], $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.3333333333333333 \cdot \sqrt[3]{{\cos^{-1} \left(\sqrt{t} \cdot \frac{0.05555555555555555}{z \cdot \frac{y}{x}}\right)}^{3}}
\end{array}
Initial program 98.5%
Simplified98.5%
add-cbrt-cube100.0%
pow3100.0%
*-commutative100.0%
associate-*l*100.0%
associate-/l/98.4%
*-commutative98.4%
Applied egg-rr98.4%
Taylor expanded in x around 0 98.4%
associate-*r*98.4%
associate-*r/97.2%
*-rgt-identity97.2%
times-frac98.4%
/-rgt-identity98.4%
associate-/r/98.4%
associate-*r/99.3%
*-commutative99.3%
associate-/l*99.3%
associate-*r/98.4%
*-commutative98.4%
associate-/l*100.0%
Simplified100.0%
(FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (cbrt (pow (acos 0.0) 3.0))))
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * cbrt(pow(acos(0.0), 3.0));
}
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.cbrt(Math.pow(Math.acos(0.0), 3.0));
}
function code(x, y, z, t) return Float64(0.3333333333333333 * cbrt((acos(0.0) ^ 3.0))) end
code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[Power[N[Power[N[ArcCos[0.0], $MachinePrecision], 3.0], $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.3333333333333333 \cdot \sqrt[3]{{\cos^{-1} 0}^{3}}
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/96.9%
associate-*l/96.9%
*-commutative96.9%
Applied egg-rr96.9%
associate-*l/96.9%
expm1-log1p-u96.9%
associate-*r*96.9%
expm1-undefine96.9%
*-commutative96.9%
associate-*l*96.9%
*-commutative96.9%
associate-/r*97.8%
Applied egg-rr97.8%
sub-neg97.8%
metadata-eval97.8%
+-commutative97.8%
log1p-undefine97.8%
rem-exp-log97.8%
+-commutative97.8%
associate-*r*97.8%
associate-*r/97.8%
associate-*l/95.8%
*-commutative95.8%
fma-define95.8%
*-commutative95.8%
associate-/l*95.8%
Simplified95.8%
Taylor expanded in x around 0 96.8%
add-cbrt-cube98.3%
pow398.3%
metadata-eval98.3%
Applied egg-rr98.3%
(FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (acos (+ -1.0 (/ (+ z (* 0.05555555555555555 (* (sqrt t) (/ x y)))) z)))))
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((-1.0 + ((z + (0.05555555555555555 * (sqrt(t) * (x / y)))) / z)));
}
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(((-1.0d0) + ((z + (0.05555555555555555d0 * (sqrt(t) * (x / y)))) / z)))
end function
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.acos((-1.0 + ((z + (0.05555555555555555 * (Math.sqrt(t) * (x / y)))) / z)));
}
def code(x, y, z, t): return 0.3333333333333333 * math.acos((-1.0 + ((z + (0.05555555555555555 * (math.sqrt(t) * (x / y)))) / z)))
function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(-1.0 + Float64(Float64(z + Float64(0.05555555555555555 * Float64(sqrt(t) * Float64(x / y)))) / z)))) end
function tmp = code(x, y, z, t) tmp = 0.3333333333333333 * acos((-1.0 + ((z + (0.05555555555555555 * (sqrt(t) * (x / y)))) / z))); end
code[x_, y_, z_, t_] := N[(0.3333333333333333 * N[ArcCos[N[(-1.0 + N[(N[(z + N[(0.05555555555555555 * N[(N[Sqrt[t], $MachinePrecision] * N[(x / y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / z), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.3333333333333333 \cdot \cos^{-1} \left(-1 + \frac{z + 0.05555555555555555 \cdot \left(\sqrt{t} \cdot \frac{x}{y}\right)}{z}\right)
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/96.9%
associate-*l/96.9%
*-commutative96.9%
Applied egg-rr96.9%
associate-*l/96.9%
expm1-log1p-u96.9%
associate-*r*96.9%
expm1-undefine96.9%
*-commutative96.9%
associate-*l*96.9%
*-commutative96.9%
associate-/r*97.8%
Applied egg-rr97.8%
sub-neg97.8%
metadata-eval97.8%
+-commutative97.8%
log1p-undefine97.8%
rem-exp-log97.8%
+-commutative97.8%
associate-*r*97.8%
associate-*r/97.8%
associate-*l/95.8%
*-commutative95.8%
fma-define95.8%
*-commutative95.8%
associate-/l*95.8%
Simplified95.8%
Taylor expanded in z around 0 98.5%
(FPCore (x y z t) :precision binary64 (* 0.3333333333333333 (acos (* (sqrt t) (* 0.05555555555555555 (/ (/ x y) z))))))
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos((sqrt(t) * (0.05555555555555555 * ((x / y) / z))));
}
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
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))));
}
def code(x, y, z, t): return 0.3333333333333333 * math.acos((math.sqrt(t) * (0.05555555555555555 * ((x / y) / z))))
function code(x, y, z, t) return Float64(0.3333333333333333 * acos(Float64(sqrt(t) * Float64(0.05555555555555555 * Float64(Float64(x / y) / z))))) end
function tmp = code(x, y, z, t) tmp = 0.3333333333333333 * acos((sqrt(t) * (0.05555555555555555 * ((x / y) / z)))); end
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}
\\
0.3333333333333333 \cdot \cos^{-1} \left(\sqrt{t} \cdot \left(0.05555555555555555 \cdot \frac{\frac{x}{y}}{z}\right)\right)
\end{array}
Initial program 98.5%
Simplified98.5%
Final simplification98.5%
(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%
*-commutative98.5%
associate-/l/96.9%
associate-*l/96.9%
*-commutative96.9%
Applied egg-rr96.9%
associate-*l/96.9%
expm1-log1p-u96.9%
associate-*r*96.9%
expm1-undefine96.9%
*-commutative96.9%
associate-*l*96.9%
*-commutative96.9%
associate-/r*97.8%
Applied egg-rr97.8%
sub-neg97.8%
metadata-eval97.8%
+-commutative97.8%
log1p-undefine97.8%
rem-exp-log97.8%
+-commutative97.8%
associate-*r*97.8%
associate-*r/97.8%
associate-*l/95.8%
*-commutative95.8%
fma-define95.8%
*-commutative95.8%
associate-/l*95.8%
Simplified95.8%
Taylor expanded in x around 0 96.8%
pow196.8%
metadata-eval96.8%
Applied egg-rr96.8%
unpow196.8%
Simplified96.8%
(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 2024143
(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)))))