
(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 (* 0.3333333333333333 (cbrt (pow (acos (* 0.05555555555555555 (* (/ (sqrt t) y) (/ x z)))) 3.0))))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * cbrt(pow(acos((0.05555555555555555 * ((sqrt(t) / y) * (x / z)))), 3.0));
}
assert x < y && y < z && z < t;
public static double code(double x, double y, double z, double t) {
return 0.3333333333333333 * Math.cbrt(Math.pow(Math.acos((0.05555555555555555 * ((Math.sqrt(t) / y) * (x / z)))), 3.0));
}
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * cbrt((acos(Float64(0.05555555555555555 * Float64(Float64(sqrt(t) / y) * Float64(x / z)))) ^ 3.0))) 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[Power[N[Power[N[ArcCos[N[(0.05555555555555555 * N[(N[(N[Sqrt[t], $MachinePrecision] / y), $MachinePrecision] * N[(x / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision], 3.0], $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
0.3333333333333333 \cdot \sqrt[3]{{\cos^{-1} \left(0.05555555555555555 \cdot \left(\frac{\sqrt{t}}{y} \cdot \frac{x}{z}\right)\right)}^{3}}
\end{array}
Initial program 98.5%
Simplified98.5%
add-cbrt-cube100.0%
pow3100.0%
*-commutative100.0%
associate-*l*100.0%
associate-/l/99.4%
*-commutative99.4%
Applied egg-rr99.4%
Taylor expanded in x around 0 99.4%
associate-*r/98.0%
times-frac98.0%
Simplified98.0%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (+ -1.0 (fma 0.3333333333333333 (acos (* (sqrt t) (* 0.05555555555555555 (/ x (* y z))))) 1.0)))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return -1.0 + fma(0.3333333333333333, acos((sqrt(t) * (0.05555555555555555 * (x / (y * z))))), 1.0);
}
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(-1.0 + fma(0.3333333333333333, acos(Float64(sqrt(t) * Float64(0.05555555555555555 * Float64(x / Float64(y * z))))), 1.0)) end
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. code[x_, y_, z_, t_] := N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[N[(N[Sqrt[t], $MachinePrecision] * N[(0.05555555555555555 * N[(x / N[(y * z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} \left(\sqrt{t} \cdot \left(0.05555555555555555 \cdot \frac{x}{y \cdot z}\right)\right), 1\right)
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/97.9%
associate-*l/97.9%
*-commutative97.9%
Applied egg-rr97.9%
associate-*l/97.9%
associate-*r*97.9%
expm1-log1p-u97.9%
expm1-undefine99.3%
Applied egg-rr99.3%
sub-neg99.3%
metadata-eval99.3%
+-commutative99.3%
log1p-undefine97.0%
rem-exp-log97.0%
+-commutative97.0%
fma-define99.4%
Simplified99.4%
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 (+ -1.0 (/ (+ y (* 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((-1.0 + ((y + (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(((-1.0d0) + ((y + (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((-1.0 + ((y + (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((-1.0 + ((y + (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(-1.0 + Float64(Float64(y + Float64(0.05555555555555555 * Float64(sqrt(t) * Float64(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((-1.0 + ((y + (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[(-1.0 + N[(N[(y + N[(0.05555555555555555 * N[(N[Sqrt[t], $MachinePrecision] * N[(x / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $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(-1 + \frac{y + 0.05555555555555555 \cdot \left(\sqrt{t} \cdot \frac{x}{z}\right)}{y}\right)
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/97.9%
associate-*l/97.9%
*-commutative97.9%
Applied egg-rr97.9%
associate-*l/97.9%
expm1-log1p-u97.9%
associate-*r*97.9%
expm1-undefine97.9%
*-commutative97.9%
*-commutative97.9%
associate-*r*97.9%
associate-*l/97.9%
associate-/l*97.9%
associate-*l*97.9%
*-commutative97.9%
associate-/r*97.9%
Applied egg-rr97.9%
sub-neg97.9%
metadata-eval97.9%
+-commutative97.9%
log1p-undefine97.9%
rem-exp-log97.9%
+-commutative97.9%
associate-*l/98.5%
associate-*r/98.5%
associate-*l/98.5%
associate-/l*96.6%
*-commutative96.6%
associate-/l*98.1%
associate-*r/98.1%
*-commutative98.1%
associate-*r*98.1%
Simplified97.9%
Taylor expanded in y around 0 98.1%
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 (* (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 98.5%
Simplified98.5%
Final simplification98.5%
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. (FPCore (x y z t) :precision binary64 (+ -1.0 (fma 0.3333333333333333 (acos 0.0) 1.0)))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return -1.0 + fma(0.3333333333333333, acos(0.0), 1.0);
}
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(-1.0 + fma(0.3333333333333333, acos(0.0), 1.0)) end
NOTE: x, y, z, and t should be sorted in increasing order before calling this function. code[x_, y_, z_, t_] := N[(-1.0 + N[(0.3333333333333333 * N[ArcCos[0.0], $MachinePrecision] + 1.0), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
-1 + \mathsf{fma}\left(0.3333333333333333, \cos^{-1} 0, 1\right)
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/97.9%
associate-*l/97.9%
*-commutative97.9%
Applied egg-rr97.9%
associate-*l/97.9%
expm1-log1p-u97.9%
associate-*r*97.9%
expm1-undefine97.9%
*-commutative97.9%
*-commutative97.9%
associate-*r*97.9%
associate-*l/97.9%
associate-/l*97.9%
associate-*l*97.9%
*-commutative97.9%
associate-/r*97.9%
Applied egg-rr97.9%
sub-neg97.9%
metadata-eval97.9%
+-commutative97.9%
log1p-undefine97.9%
rem-exp-log97.9%
+-commutative97.9%
associate-*l/98.5%
associate-*r/98.5%
associate-*l/98.5%
associate-/l*96.6%
*-commutative96.6%
associate-/l*98.1%
associate-*r/98.1%
*-commutative98.1%
associate-*r*98.1%
Simplified97.9%
Taylor expanded in x around 0 96.4%
expm1-log1p-u96.4%
expm1-undefine97.8%
metadata-eval97.8%
Applied egg-rr97.8%
sub-neg97.8%
metadata-eval97.8%
+-commutative97.8%
log1p-undefine95.5%
rem-exp-log95.5%
+-commutative95.5%
fma-define97.8%
Simplified97.8%
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 0.0)))
assert(x < y && y < z && z < t);
double code(double x, double y, double z, double t) {
return 0.3333333333333333 * acos(0.0);
}
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(0.0d0)
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(0.0);
}
[x, y, z, t] = sort([x, y, z, t]) def code(x, y, z, t): return 0.3333333333333333 * math.acos(0.0)
x, y, z, t = sort([x, y, z, t]) function code(x, y, z, t) return Float64(0.3333333333333333 * acos(0.0)) end
x, y, z, t = num2cell(sort([x, y, z, t])){:}
function tmp = code(x, y, z, t)
tmp = 0.3333333333333333 * acos(0.0);
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[0.0], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
[x, y, z, t] = \mathsf{sort}([x, y, z, t])\\
\\
0.3333333333333333 \cdot \cos^{-1} 0
\end{array}
Initial program 98.5%
Simplified98.5%
*-commutative98.5%
associate-/l/97.9%
associate-*l/97.9%
*-commutative97.9%
Applied egg-rr97.9%
associate-*l/97.9%
expm1-log1p-u97.9%
associate-*r*97.9%
expm1-undefine97.9%
*-commutative97.9%
*-commutative97.9%
associate-*r*97.9%
associate-*l/97.9%
associate-/l*97.9%
associate-*l*97.9%
*-commutative97.9%
associate-/r*97.9%
Applied egg-rr97.9%
sub-neg97.9%
metadata-eval97.9%
+-commutative97.9%
log1p-undefine97.9%
rem-exp-log97.9%
+-commutative97.9%
associate-*l/98.5%
associate-*r/98.5%
associate-*l/98.5%
associate-/l*96.6%
*-commutative96.6%
associate-/l*98.1%
associate-*r/98.1%
*-commutative98.1%
associate-*r*98.1%
Simplified97.9%
Taylor expanded in x around 0 96.4%
pow196.4%
metadata-eval96.4%
Applied egg-rr96.4%
unpow196.4%
Simplified96.4%
(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 2024170
(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)))))