
(FPCore (g h a) :precision binary64 (let* ((t_0 (/ 1.0 (* 2.0 a))) (t_1 (sqrt (- (* g g) (* h h))))) (+ (cbrt (* t_0 (+ (- g) t_1))) (cbrt (* t_0 (- (- g) t_1))))))
double code(double g, double h, double a) {
double t_0 = 1.0 / (2.0 * a);
double t_1 = sqrt(((g * g) - (h * h)));
return cbrt((t_0 * (-g + t_1))) + cbrt((t_0 * (-g - t_1)));
}
public static double code(double g, double h, double a) {
double t_0 = 1.0 / (2.0 * a);
double t_1 = Math.sqrt(((g * g) - (h * h)));
return Math.cbrt((t_0 * (-g + t_1))) + Math.cbrt((t_0 * (-g - t_1)));
}
function code(g, h, a) t_0 = Float64(1.0 / Float64(2.0 * a)) t_1 = sqrt(Float64(Float64(g * g) - Float64(h * h))) return Float64(cbrt(Float64(t_0 * Float64(Float64(-g) + t_1))) + cbrt(Float64(t_0 * Float64(Float64(-g) - t_1)))) end
code[g_, h_, a_] := Block[{t$95$0 = N[(1.0 / N[(2.0 * a), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[Sqrt[N[(N[(g * g), $MachinePrecision] - N[(h * h), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]}, N[(N[Power[N[(t$95$0 * N[((-g) + t$95$1), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[N[(t$95$0 * N[((-g) - t$95$1), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{1}{2 \cdot a}\\
t_1 := \sqrt{g \cdot g - h \cdot h}\\
\sqrt[3]{t\_0 \cdot \left(\left(-g\right) + t\_1\right)} + \sqrt[3]{t\_0 \cdot \left(\left(-g\right) - t\_1\right)}
\end{array}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (g h a) :precision binary64 (let* ((t_0 (/ 1.0 (* 2.0 a))) (t_1 (sqrt (- (* g g) (* h h))))) (+ (cbrt (* t_0 (+ (- g) t_1))) (cbrt (* t_0 (- (- g) t_1))))))
double code(double g, double h, double a) {
double t_0 = 1.0 / (2.0 * a);
double t_1 = sqrt(((g * g) - (h * h)));
return cbrt((t_0 * (-g + t_1))) + cbrt((t_0 * (-g - t_1)));
}
public static double code(double g, double h, double a) {
double t_0 = 1.0 / (2.0 * a);
double t_1 = Math.sqrt(((g * g) - (h * h)));
return Math.cbrt((t_0 * (-g + t_1))) + Math.cbrt((t_0 * (-g - t_1)));
}
function code(g, h, a) t_0 = Float64(1.0 / Float64(2.0 * a)) t_1 = sqrt(Float64(Float64(g * g) - Float64(h * h))) return Float64(cbrt(Float64(t_0 * Float64(Float64(-g) + t_1))) + cbrt(Float64(t_0 * Float64(Float64(-g) - t_1)))) end
code[g_, h_, a_] := Block[{t$95$0 = N[(1.0 / N[(2.0 * a), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[Sqrt[N[(N[(g * g), $MachinePrecision] - N[(h * h), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]}, N[(N[Power[N[(t$95$0 * N[((-g) + t$95$1), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[N[(t$95$0 * N[((-g) - t$95$1), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{1}{2 \cdot a}\\
t_1 := \sqrt{g \cdot g - h \cdot h}\\
\sqrt[3]{t\_0 \cdot \left(\left(-g\right) + t\_1\right)} + \sqrt[3]{t\_0 \cdot \left(\left(-g\right) - t\_1\right)}
\end{array}
\end{array}
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (* (cbrt g) (cbrt (/ -1.0 a)))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + (cbrt(g) * cbrt((-1.0 / a)));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + (Math.cbrt(g) * Math.cbrt((-1.0 / a)));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(cbrt(g) * cbrt(Float64(-1.0 / a)))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(N[Power[g, 1/3], $MachinePrecision] * N[Power[N[(-1.0 / a), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \sqrt[3]{g} \cdot \sqrt[3]{\frac{-1}{a}}
\end{array}
Initial program 41.9%
Simplified42.2%
Taylor expanded in g around inf 21.3%
Taylor expanded in g around inf 73.3%
mul-1-neg73.3%
distribute-neg-frac273.3%
Simplified73.3%
pow1/334.1%
div-inv34.0%
unpow-prod-down18.9%
pow1/345.6%
Applied egg-rr45.6%
unpow1/396.5%
distribute-frac-neg296.5%
distribute-neg-frac96.5%
metadata-eval96.5%
Simplified96.5%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (/ (cbrt (- g)) (cbrt a))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + (cbrt(-g) / cbrt(a));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + (Math.cbrt(-g) / Math.cbrt(a));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(cbrt(Float64(-g)) / cbrt(a))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(N[Power[(-g), 1/3], $MachinePrecision] / N[Power[a, 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \frac{\sqrt[3]{-g}}{\sqrt[3]{a}}
\end{array}
Initial program 41.9%
Simplified42.2%
Taylor expanded in g around inf 21.3%
Taylor expanded in g around inf 73.3%
mul-1-neg73.3%
distribute-neg-frac273.3%
Simplified73.3%
frac-2neg73.3%
cbrt-div96.4%
Applied egg-rr96.4%
remove-double-neg96.4%
Simplified96.4%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (/ 1.0 (cbrt (/ a (- g))))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + (1.0 / cbrt((a / -g)));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + (1.0 / Math.cbrt((a / -g)));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(1.0 / cbrt(Float64(a / Float64(-g))))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(1.0 / N[Power[N[(a / (-g)), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \frac{1}{\sqrt[3]{\frac{a}{-g}}}
\end{array}
Initial program 41.9%
Simplified42.2%
Taylor expanded in g around inf 21.3%
Taylor expanded in g around inf 73.3%
mul-1-neg73.3%
distribute-neg-frac273.3%
Simplified73.3%
clear-num73.1%
cbrt-div73.8%
metadata-eval73.8%
Applied egg-rr73.8%
Final simplification73.8%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (cbrt (/ g (- a)))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + cbrt((g / -a));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + Math.cbrt((g / -a));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + cbrt(Float64(g / Float64(-a)))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[N[(g / (-a)), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \sqrt[3]{\frac{g}{-a}}
\end{array}
Initial program 41.9%
Simplified42.2%
Taylor expanded in g around inf 21.3%
Taylor expanded in g around inf 73.3%
mul-1-neg73.3%
distribute-neg-frac273.3%
Simplified73.3%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (cbrt (/ g a))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + cbrt((g / a));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + Math.cbrt((g / a));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + cbrt(Float64(g / a))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[N[(g / a), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \sqrt[3]{\frac{g}{a}}
\end{array}
Initial program 41.9%
Simplified42.2%
Taylor expanded in g around inf 21.3%
Taylor expanded in g around inf 73.3%
mul-1-neg73.3%
distribute-neg-frac273.3%
Simplified73.3%
pow1/334.1%
div-inv34.0%
unpow-prod-down18.9%
pow1/345.6%
Applied egg-rr45.6%
unpow1/396.5%
distribute-frac-neg296.5%
distribute-neg-frac96.5%
metadata-eval96.5%
Simplified96.5%
cbrt-unprod73.3%
frac-2neg73.3%
metadata-eval73.3%
div-inv73.3%
expm1-log1p-u47.7%
expm1-undefine24.3%
sub-neg24.3%
metadata-eval24.3%
log1p-undefine24.3%
rem-exp-log49.9%
+-commutative49.9%
add-sqr-sqrt23.4%
sqrt-unprod14.1%
distribute-frac-neg214.1%
distribute-frac-neg214.1%
sqr-neg14.1%
sqrt-unprod1.0%
add-sqr-sqrt1.8%
Applied egg-rr1.8%
associate-+l+1.4%
metadata-eval1.4%
+-rgt-identity1.4%
Simplified1.4%
herbie shell --seed 2024097
(FPCore (g h a)
:name "2-ancestry mixing, positive discriminant"
:precision binary64
(+ (cbrt (* (/ 1.0 (* 2.0 a)) (+ (- g) (sqrt (- (* g g) (* h h)))))) (cbrt (* (/ 1.0 (* 2.0 a)) (- (- g) (sqrt (- (* g g) (* h h))))))))