
(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 7 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))) (* (cbrt -0.5) (pow 2.0 0.3333333333333333)))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + ((cbrt(g) * cbrt((1.0 / a))) * (cbrt(-0.5) * pow(2.0, 0.3333333333333333)));
}
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))) * (Math.cbrt(-0.5) * Math.pow(2.0, 0.3333333333333333)));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(Float64(cbrt(g) * cbrt(Float64(1.0 / a))) * Float64(cbrt(-0.5) * (2.0 ^ 0.3333333333333333)))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(N[(N[Power[g, 1/3], $MachinePrecision] * N[Power[N[(1.0 / a), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision] * N[(N[Power[-0.5, 1/3], $MachinePrecision] * N[Power[2.0, 0.3333333333333333], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \left(\sqrt[3]{g} \cdot \sqrt[3]{\frac{1}{a}}\right) \cdot \left(\sqrt[3]{-0.5} \cdot {2}^{0.3333333333333333}\right)
\end{array}
Initial program 38.1%
Simplified38.1%
Taylor expanded in h around 0 10.0%
unpow1/323.8%
*-lft-identity23.8%
Simplified23.8%
pow1/310.0%
div-inv10.0%
unpow-prod-down9.8%
pow1/313.6%
Applied egg-rr13.6%
unpow1/329.7%
Simplified29.7%
Taylor expanded in g around inf 94.4%
pow1/395.0%
Applied egg-rr95.0%
Final simplification95.0%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (* (* (cbrt g) (cbrt (/ 1.0 a))) (* (cbrt -0.5) (cbrt 2.0)))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + ((cbrt(g) * cbrt((1.0 / a))) * (cbrt(-0.5) * cbrt(2.0)));
}
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))) * (Math.cbrt(-0.5) * Math.cbrt(2.0)));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(Float64(cbrt(g) * cbrt(Float64(1.0 / a))) * Float64(cbrt(-0.5) * cbrt(2.0)))) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[(N[(N[Power[g, 1/3], $MachinePrecision] * N[Power[N[(1.0 / a), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision] * N[(N[Power[-0.5, 1/3], $MachinePrecision] * N[Power[2.0, 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \left(\sqrt[3]{g} \cdot \sqrt[3]{\frac{1}{a}}\right) \cdot \left(\sqrt[3]{-0.5} \cdot \sqrt[3]{2}\right)
\end{array}
Initial program 38.1%
Simplified38.1%
Taylor expanded in h around 0 10.0%
unpow1/323.8%
*-lft-identity23.8%
Simplified23.8%
pow1/310.0%
div-inv10.0%
unpow-prod-down9.8%
pow1/313.6%
Applied egg-rr13.6%
unpow1/329.7%
Simplified29.7%
Taylor expanded in g around inf 94.4%
Final simplification94.4%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (* (* (cbrt -0.5) (cbrt 2.0)) (/ (cbrt g) (cbrt a)))))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + ((cbrt(-0.5) * cbrt(2.0)) * (cbrt(g) / cbrt(a)));
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + ((Math.cbrt(-0.5) * Math.cbrt(2.0)) * (Math.cbrt(g) / Math.cbrt(a)));
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + Float64(Float64(cbrt(-0.5) * cbrt(2.0)) * Float64(cbrt(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[(N[Power[-0.5, 1/3], $MachinePrecision] * N[Power[2.0, 1/3], $MachinePrecision]), $MachinePrecision] * N[(N[Power[g, 1/3], $MachinePrecision] / N[Power[a, 1/3], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \left(\sqrt[3]{-0.5} \cdot \sqrt[3]{2}\right) \cdot \frac{\sqrt[3]{g}}{\sqrt[3]{a}}
\end{array}
Initial program 38.1%
Simplified38.1%
Taylor expanded in h around 0 10.0%
unpow1/323.8%
*-lft-identity23.8%
Simplified23.8%
pow1/310.0%
div-inv10.0%
unpow-prod-down9.8%
pow1/313.6%
Applied egg-rr13.6%
unpow1/329.7%
Simplified29.7%
Taylor expanded in g around inf 94.4%
cbrt-div94.2%
metadata-eval94.2%
un-div-inv94.3%
Applied egg-rr94.3%
Final simplification94.3%
(FPCore (g h a)
:precision binary64
(if (or (<= g -1.35e+154) (not (<= g -1.55e-121)))
(+ (cbrt (* (/ 0.5 a) (- g g))) (cbrt (/ (- g) a)))
(+
(* (cbrt (/ 0.5 a)) (cbrt (- (- g) g)))
(cbrt (* (+ g (sqrt (- (* g g) (* h h)))) (/ -0.5 a))))))
double code(double g, double h, double a) {
double tmp;
if ((g <= -1.35e+154) || !(g <= -1.55e-121)) {
tmp = cbrt(((0.5 / a) * (g - g))) + cbrt((-g / a));
} else {
tmp = (cbrt((0.5 / a)) * cbrt((-g - g))) + cbrt(((g + sqrt(((g * g) - (h * h)))) * (-0.5 / a)));
}
return tmp;
}
public static double code(double g, double h, double a) {
double tmp;
if ((g <= -1.35e+154) || !(g <= -1.55e-121)) {
tmp = Math.cbrt(((0.5 / a) * (g - g))) + Math.cbrt((-g / a));
} else {
tmp = (Math.cbrt((0.5 / a)) * Math.cbrt((-g - g))) + Math.cbrt(((g + Math.sqrt(((g * g) - (h * h)))) * (-0.5 / a)));
}
return tmp;
}
function code(g, h, a) tmp = 0.0 if ((g <= -1.35e+154) || !(g <= -1.55e-121)) tmp = Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + cbrt(Float64(Float64(-g) / a))); else tmp = Float64(Float64(cbrt(Float64(0.5 / a)) * cbrt(Float64(Float64(-g) - g))) + cbrt(Float64(Float64(g + sqrt(Float64(Float64(g * g) - Float64(h * h)))) * Float64(-0.5 / a)))); end return tmp end
code[g_, h_, a_] := If[Or[LessEqual[g, -1.35e+154], N[Not[LessEqual[g, -1.55e-121]], $MachinePrecision]], 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], N[(N[(N[Power[N[(0.5 / a), $MachinePrecision], 1/3], $MachinePrecision] * N[Power[N[((-g) - g), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision] + N[Power[N[(N[(g + N[Sqrt[N[(N[(g * g), $MachinePrecision] - N[(h * h), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[(-0.5 / a), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;g \leq -1.35 \cdot 10^{+154} \lor \neg \left(g \leq -1.55 \cdot 10^{-121}\right):\\
\;\;\;\;\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \sqrt[3]{\frac{-g}{a}}\\
\mathbf{else}:\\
\;\;\;\;\sqrt[3]{\frac{0.5}{a}} \cdot \sqrt[3]{\left(-g\right) - g} + \sqrt[3]{\left(g + \sqrt{g \cdot g - h \cdot h}\right) \cdot \frac{-0.5}{a}}\\
\end{array}
\end{array}
if g < -1.35000000000000003e154 or -1.5499999999999999e-121 < g Initial program 27.4%
Simplified27.4%
Taylor expanded in g around inf 25.7%
Taylor expanded in g around inf 61.8%
Taylor expanded in g around 0 61.9%
Simplified61.9%
if -1.35000000000000003e154 < g < -1.5499999999999999e-121Initial program 77.1%
Simplified77.1%
cbrt-prod97.2%
pow297.2%
pow297.2%
Applied egg-rr97.2%
Taylor expanded in g around -inf 97.2%
neg-mul-197.2%
Simplified97.2%
Final simplification69.5%
(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(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 38.1%
Simplified38.1%
Taylor expanded in g around inf 20.8%
Taylor expanded in g around inf 65.1%
Taylor expanded in g around 0 65.2%
Simplified65.2%
Final simplification65.2%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) (cbrt 0.5)))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + cbrt(0.5);
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + Math.cbrt(0.5);
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + cbrt(0.5)) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + N[Power[0.5, 1/3], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + \sqrt[3]{0.5}
\end{array}
Initial program 38.1%
Simplified38.1%
Taylor expanded in g around inf 20.8%
Taylor expanded in g around inf 65.1%
frac-2neg65.1%
metadata-eval65.1%
associate-*r/65.2%
flip-+0.0%
unpow20.0%
unpow20.0%
+-inverses0.0%
+-inverses0.0%
Applied egg-rr0.0%
Simplified4.8%
Final simplification4.8%
(FPCore (g h a) :precision binary64 (+ (cbrt (* (/ 0.5 a) (- g g))) -2.0))
double code(double g, double h, double a) {
return cbrt(((0.5 / a) * (g - g))) + -2.0;
}
public static double code(double g, double h, double a) {
return Math.cbrt(((0.5 / a) * (g - g))) + -2.0;
}
function code(g, h, a) return Float64(cbrt(Float64(Float64(0.5 / a) * Float64(g - g))) + -2.0) end
code[g_, h_, a_] := N[(N[Power[N[(N[(0.5 / a), $MachinePrecision] * N[(g - g), $MachinePrecision]), $MachinePrecision], 1/3], $MachinePrecision] + -2.0), $MachinePrecision]
\begin{array}{l}
\\
\sqrt[3]{\frac{0.5}{a} \cdot \left(g - g\right)} + -2
\end{array}
Initial program 38.1%
Simplified38.1%
Taylor expanded in g around inf 20.8%
Taylor expanded in g around inf 65.1%
cbrt-prod94.9%
flip-+0.0%
cbrt-div0.0%
unpow20.0%
unpow20.0%
+-inverses0.0%
metadata-eval0.0%
metadata-eval0.0%
+-inverses0.0%
+-inverses0.0%
+-inverses0.0%
add-cbrt-cube0.0%
+-inverses0.0%
+-inverses0.0%
metadata-eval0.0%
metadata-eval0.0%
+-inverses0.0%
+-inverses0.0%
+-inverses0.0%
add-cbrt-cube0.0%
+-inverses0.0%
Applied egg-rr0.0%
Simplified3.9%
Final simplification3.9%
herbie shell --seed 2023333
(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))))))))