\frac{1}{3} \cdot \cos^{-1} \left(\frac{3 \cdot \frac{x}{y \cdot 27}}{z \cdot 2} \cdot \sqrt{t}\right)
\begin{array}{l}
t_1 := \sqrt[3]{e^{\cos^{-1} \left(0.05555555555555555 \cdot \left(\frac{x}{y \cdot z} \cdot \sqrt{t}\right)\right)}}\\
\log \left({t_1}^{0.6666666666666666} \cdot \sqrt[3]{t_1}\right)
\end{array}
(FPCore (x y z t) :precision binary64 (* (/ 1.0 3.0) (acos (* (/ (* 3.0 (/ x (* y 27.0))) (* z 2.0)) (sqrt t)))))
(FPCore (x y z t)
:precision binary64
(let* ((t_1
(cbrt
(exp (acos (* 0.05555555555555555 (* (/ x (* y z)) (sqrt t))))))))
(log (* (pow t_1 0.6666666666666666) (cbrt t_1)))))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));
}
double code(double x, double y, double z, double t) {
double t_1 = cbrt(exp(acos(0.05555555555555555 * ((x / (y * z)) * sqrt(t)))));
return log(pow(t_1, 0.6666666666666666) * cbrt(t_1));
}




Bits error versus x




Bits error versus y




Bits error versus z




Bits error versus t
Results
| Original | 1.2 |
|---|---|
| Target | 1.1 |
| Herbie | 0.2 |
Initial program 1.2
Simplified1.6
Applied add-log-exp_binary641.6
Simplified1.1
Applied pow1/3_binary641.1
Applied add-cube-cbrt_binary641.2
Simplified0.2
Simplified0.2
Final simplification0.2
herbie shell --seed 2022068
(FPCore (x y z t)
:name "Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, D"
:precision binary64
:herbie-target
(/ (acos (* (/ (/ x 27.0) (* y z)) (/ (sqrt t) (/ 2.0 3.0)))) 3.0)
(* (/ 1.0 3.0) (acos (* (/ (* 3.0 (/ x (* y 27.0))) (* z 2.0)) (sqrt t)))))