Average Error: 1.8 → 1.6
Time: 4.6s
Precision: 64
\[x + \left(y - x\right) \cdot \frac{z}{t}\]
↓
\[\begin{array}{l} \mathbf{if}\;x \le -1.1131496519401694 \cdot 10^{-128} \lor \neg \left(x \le 1.1326421016751084 \cdot 10^{-125}\right):\\ \;\;\;\;x + \left(y - x\right) \cdot \frac{z}{t}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{y - x}{\sqrt[3]{t} \cdot \sqrt[3]{t}} \cdot \frac{z}{\sqrt[3]{t}}\\ \end{array}\]
x + \left(y - x\right) \cdot \frac{z}{t}
↓
\begin{array}{l}
\mathbf{if}\;x \le -1.1131496519401694 \cdot 10^{-128} \lor \neg \left(x \le 1.1326421016751084 \cdot 10^{-125}\right):\\
\;\;\;\;x + \left(y - x\right) \cdot \frac{z}{t}\\

\mathbf{else}:\\
\;\;\;\;x + \frac{y - x}{\sqrt[3]{t} \cdot \sqrt[3]{t}} \cdot \frac{z}{\sqrt[3]{t}}\\

\end{array}
double f(double x, double y, double z, double t) {
        double r651867 = x;
        double r651868 = y;
        double r651869 = r651868 - r651867;
        double r651870 = z;
        double r651871 = t;
        double r651872 = r651870 / r651871;
        double r651873 = r651869 * r651872;
        double r651874 = r651867 + r651873;
        return r651874;
}
↓
double f(double x, double y, double z, double t) {
        double r651875 = x;
        double r651876 = -1.1131496519401694e-128;
        bool r651877 = r651875 <= r651876;
        double r651878 = 1.1326421016751084e-125;
        bool r651879 = r651875 <= r651878;
        double r651880 = !r651879;
        bool r651881 = r651877 || r651880;
        double r651882 = y;
        double r651883 = r651882 - r651875;
        double r651884 = z;
        double r651885 = t;
        double r651886 = r651884 / r651885;
        double r651887 = r651883 * r651886;
        double r651888 = r651875 + r651887;
        double r651889 = cbrt(r651885);
        double r651890 = r651889 * r651889;
        double r651891 = r651883 / r651890;
        double r651892 = r651884 / r651889;
        double r651893 = r651891 * r651892;
        double r651894 = r651875 + r651893;
        double r651895 = r651881 ? r651888 : r651894;
        return r651895;
}

Error

Bits error versus x

Bits error versus y

Bits error versus z

Bits error versus t

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original1.8
Target2.0
Herbie1.6
\[\begin{array}{l} \mathbf{if}\;\left(y - x\right) \cdot \frac{z}{t} \lt -1013646692435.887:\\ \;\;\;\;x + \frac{y - x}{\frac{t}{z}}\\ \mathbf{elif}\;\left(y - x\right) \cdot \frac{z}{t} \lt -0.0:\\ \;\;\;\;x + \frac{\left(y - x\right) \cdot z}{t}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{y - x}{\frac{t}{z}}\\ \end{array}\]

Derivation

  1. Split input into 2 regimes

  2. if x < -1.1131496519401694e-128 or 1.1326421016751084e-125 < x

    1. Initial program 0.6

      \[x + \left(y - x\right) \cdot \frac{z}{t}\]

    if -1.1131496519401694e-128 < x < 1.1326421016751084e-125

    1. Initial program 4.5

      \[x + \left(y - x\right) \cdot \frac{z}{t}\]
    2. Using strategy rm

    3. Applied add-cube-cbrt5.2

      \[\leadsto x + \left(y - x\right) \cdot \frac{z}{\color{blue}{\left(\sqrt[3]{t} \cdot \sqrt[3]{t}\right) \cdot \sqrt[3]{t}}}\]

    4. Applied *-un-lft-identity5.2

      \[\leadsto x + \left(y - x\right) \cdot \frac{\color{blue}{1 \cdot z}}{\left(\sqrt[3]{t} \cdot \sqrt[3]{t}\right) \cdot \sqrt[3]{t}}\]

    5. Applied times-frac5.2

      \[\leadsto x + \left(y - x\right) \cdot \color{blue}{\left(\frac{1}{\sqrt[3]{t} \cdot \sqrt[3]{t}} \cdot \frac{z}{\sqrt[3]{t}}\right)}\]

    6. Applied associate-*r*3.6

      \[\leadsto x + \color{blue}{\left(\left(y - x\right) \cdot \frac{1}{\sqrt[3]{t} \cdot \sqrt[3]{t}}\right) \cdot \frac{z}{\sqrt[3]{t}}}\]

    7. Simplified3.6

      \[\leadsto x + \color{blue}{\frac{y - x}{\sqrt[3]{t} \cdot \sqrt[3]{t}}} \cdot \frac{z}{\sqrt[3]{t}}\]
  3. Recombined 2 regimes into one program.

  4. Final simplification1.6

    \[\leadsto \begin{array}{l} \mathbf{if}\;x \le -1.1131496519401694 \cdot 10^{-128} \lor \neg \left(x \le 1.1326421016751084 \cdot 10^{-125}\right):\\ \;\;\;\;x + \left(y - x\right) \cdot \frac{z}{t}\\ \mathbf{else}:\\ \;\;\;\;x + \frac{y - x}{\sqrt[3]{t} \cdot \sqrt[3]{t}} \cdot \frac{z}{\sqrt[3]{t}}\\ \end{array}\]

Reproduce

herbie shell --seed 2020025 
(FPCore (x y z t)
  :name "Graphics.Rendering.Plot.Render.Plot.Axis:tickPosition from plot-0.2.3.4"
  :precision binary64

  :herbie-target
  (if (< (* (- y x) (/ z t)) -1013646692435.887) (+ x (/ (- y x) (/ t z))) (if (< (* (- y x) (/ z t)) -0.0) (+ x (/ (* (- y x) z) t)) (+ x (/ (- y x) (/ t z)))))

  (+ x (* (- y x) (/ z t))))