
(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 (- (hypot g h) g))) (cbrt a)) (/ (cbrt (pow (sqrt (+ g (hypot g h))) 2.0)) (cbrt (* a -2.0)))))
double code(double g, double h, double a) {
return (cbrt((0.5 * (hypot(g, h) - g))) / cbrt(a)) + (cbrt(pow(sqrt((g + hypot(g, h))), 2.0)) / cbrt((a * -2.0)));
}
public static double code(double g, double h, double a) {
return (Math.cbrt((0.5 * (Math.hypot(g, h) - g))) / Math.cbrt(a)) + (Math.cbrt(Math.pow(Math.sqrt((g + Math.hypot(g, h))), 2.0)) / Math.cbrt((a * -2.0)));
}
function code(g, h, a) return Float64(Float64(cbrt(Float64(0.5 * Float64(hypot(g, h) - g))) / cbrt(a)) + Float64(cbrt((sqrt(Float64(g + hypot(g, h))) ^ 2.0)) / cbrt(Float64(a * -2.0)))) end
code[g_, h_, a_] := N[(N[(N[Power[N[(0.5 * N[(N[Sqrt[g ^ 2 + h ^ 2], $MachinePrecision] - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] / N[Power[a, 1/3], $MachinePrecision]), $MachinePrecision] + N[(N[Power[N[Power[N[Sqrt[N[(g + N[Sqrt[g ^ 2 + h ^ 2], $MachinePrecision]), $MachinePrecision]], $MachinePrecision], 2.0], $MachinePrecision], 1/3], $MachinePrecision] / N[Power[N[(a * -2.0), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\sqrt[3]{0.5 \cdot \left(\mathsf{hypot}\left(g, h\right) - g\right)}}{\sqrt[3]{a}} + \frac{\sqrt[3]{{\left(\sqrt{g + \mathsf{hypot}\left(g, h\right)}\right)}^{2}}}{\sqrt[3]{a \cdot -2}}
\end{array}
Initial program 44.8%
associate-/r*44.8%
metadata-eval44.8%
+-commutative44.8%
unsub-neg44.8%
fma-neg44.8%
sub-neg44.8%
distribute-neg-out44.8%
neg-mul-144.8%
associate-*r*44.8%
Simplified44.8%
cbrt-div48.7%
fma-udef48.7%
add-sqr-sqrt24.1%
hypot-def25.4%
add-sqr-sqrt25.4%
sqrt-unprod49.9%
sqr-neg49.9%
sqrt-unprod50.1%
add-sqr-sqrt50.1%
sqrt-prod23.5%
add-sqr-sqrt50.1%
div-inv50.1%
metadata-eval50.1%
Applied egg-rr50.1%
associate-*l/50.1%
cbrt-div52.0%
Applied egg-rr95.9%
add-sqr-sqrt95.9%
pow295.9%
Applied egg-rr95.9%
Final simplification95.9%
(FPCore (g h a) :precision binary64 (+ (/ (cbrt (* 0.5 (- (hypot g h) g))) (cbrt a)) (/ (cbrt (+ g (hypot g h))) (cbrt (* a -2.0)))))
double code(double g, double h, double a) {
return (cbrt((0.5 * (hypot(g, h) - g))) / cbrt(a)) + (cbrt((g + hypot(g, h))) / cbrt((a * -2.0)));
}
public static double code(double g, double h, double a) {
return (Math.cbrt((0.5 * (Math.hypot(g, h) - g))) / Math.cbrt(a)) + (Math.cbrt((g + Math.hypot(g, h))) / Math.cbrt((a * -2.0)));
}
function code(g, h, a) return Float64(Float64(cbrt(Float64(0.5 * Float64(hypot(g, h) - g))) / cbrt(a)) + Float64(cbrt(Float64(g + hypot(g, h))) / cbrt(Float64(a * -2.0)))) end
code[g_, h_, a_] := N[(N[(N[Power[N[(0.5 * N[(N[Sqrt[g ^ 2 + h ^ 2], $MachinePrecision] - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] / N[Power[a, 1/3], $MachinePrecision]), $MachinePrecision] + N[(N[Power[N[(g + N[Sqrt[g ^ 2 + h ^ 2], $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] / N[Power[N[(a * -2.0), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\sqrt[3]{0.5 \cdot \left(\mathsf{hypot}\left(g, h\right) - g\right)}}{\sqrt[3]{a}} + \frac{\sqrt[3]{g + \mathsf{hypot}\left(g, h\right)}}{\sqrt[3]{a \cdot -2}}
\end{array}
Initial program 44.8%
associate-/r*44.8%
metadata-eval44.8%
+-commutative44.8%
unsub-neg44.8%
fma-neg44.8%
sub-neg44.8%
distribute-neg-out44.8%
neg-mul-144.8%
associate-*r*44.8%
Simplified44.8%
cbrt-div48.7%
fma-udef48.7%
add-sqr-sqrt24.1%
hypot-def25.4%
add-sqr-sqrt25.4%
sqrt-unprod49.9%
sqr-neg49.9%
sqrt-unprod50.1%
add-sqr-sqrt50.1%
sqrt-prod23.5%
add-sqr-sqrt50.1%
div-inv50.1%
metadata-eval50.1%
Applied egg-rr50.1%
associate-*l/50.1%
cbrt-div52.0%
Applied egg-rr95.9%
Final simplification95.9%
(FPCore (g h a) :precision binary64 (+ (cbrt (* 0.0 (/ -0.5 a))) (/ (cbrt (- g)) (cbrt a))))
double code(double g, double h, double a) {
return cbrt((0.0 * (-0.5 / a))) + (cbrt(-g) / cbrt(a));
}
public static double code(double g, double h, double a) {
return Math.cbrt((0.0 * (-0.5 / a))) + (Math.cbrt(-g) / Math.cbrt(a));
}
function code(g, h, a) return Float64(cbrt(Float64(0.0 * Float64(-0.5 / a))) + Float64(cbrt(Float64(-g)) / cbrt(a))) end
code[g_, h_, a_] := N[(N[Power[N[(0.0 * N[(-0.5 / a), $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]{0 \cdot \frac{-0.5}{a}} + \frac{\sqrt[3]{-g}}{\sqrt[3]{a}}
\end{array}
Initial program 44.8%
Simplified44.8%
Taylor expanded in g around inf 25.7%
distribute-rgt1-in25.7%
metadata-eval25.7%
mul0-lft25.7%
metadata-eval25.7%
Simplified25.7%
Taylor expanded in g around inf 74.9%
associate-*r/74.9%
neg-mul-174.9%
Simplified74.9%
cbrt-div95.9%
Applied egg-rr95.9%
Final simplification95.9%
(FPCore (g h a) :precision binary64 (+ (cbrt (* 0.0 (/ -0.5 a))) (/ 1.0 (cbrt (/ a (- g))))))
double code(double g, double h, double a) {
return cbrt((0.0 * (-0.5 / a))) + (1.0 / cbrt((a / -g)));
}
public static double code(double g, double h, double a) {
return Math.cbrt((0.0 * (-0.5 / a))) + (1.0 / Math.cbrt((a / -g)));
}
function code(g, h, a) return Float64(cbrt(Float64(0.0 * Float64(-0.5 / a))) + Float64(1.0 / cbrt(Float64(a / Float64(-g))))) end
code[g_, h_, a_] := N[(N[Power[N[(0.0 * N[(-0.5 / a), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(1.0 / N[Power[N[(a / (-g)), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{0 \cdot \frac{-0.5}{a}} + \frac{1}{\sqrt[3]{\frac{a}{-g}}}
\end{array}
Initial program 44.8%
Simplified44.8%
Taylor expanded in g around inf 25.7%
distribute-rgt1-in25.7%
metadata-eval25.7%
mul0-lft25.7%
metadata-eval25.7%
Simplified25.7%
Taylor expanded in g around inf 74.9%
associate-*r/74.9%
neg-mul-174.9%
Simplified74.9%
clear-num74.4%
cbrt-div76.0%
metadata-eval76.0%
Applied egg-rr76.0%
Final simplification76.0%
(FPCore (g h a) :precision binary64 (+ (cbrt (* 0.0 (/ -0.5 a))) (cbrt (- (/ g a)))))
double code(double g, double h, double a) {
return cbrt((0.0 * (-0.5 / a))) + cbrt(-(g / a));
}
public static double code(double g, double h, double a) {
return Math.cbrt((0.0 * (-0.5 / a))) + Math.cbrt(-(g / a));
}
function code(g, h, a) return Float64(cbrt(Float64(0.0 * Float64(-0.5 / a))) + cbrt(Float64(-Float64(g / a)))) end
code[g_, h_, a_] := N[(N[Power[N[(0.0 * N[(-0.5 / a), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[(-N[(g / a), $MachinePrecision]), 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{0 \cdot \frac{-0.5}{a}} + \sqrt[3]{-\frac{g}{a}}
\end{array}
Initial program 44.8%
Simplified44.8%
Taylor expanded in g around inf 25.7%
distribute-rgt1-in25.7%
metadata-eval25.7%
mul0-lft25.7%
metadata-eval25.7%
Simplified25.7%
Taylor expanded in g around inf 74.9%
associate-*r/74.9%
neg-mul-174.9%
Simplified74.9%
Final simplification74.9%
herbie shell --seed 2023207
(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))))))))