Average Error: 9.8 → 0.2
Time: 12.5s
Precision: 64
\[\frac{x}{y \cdot y}\]
↓
\[\frac{\frac{x}{y}}{y}\]
\frac{x}{y \cdot y}
↓
\frac{\frac{x}{y}}{y}
double f(double x, double y) {
        double r16491320 = x;
        double r16491321 = y;
        double r16491322 = r16491321 * r16491321;
        double r16491323 = r16491320 / r16491322;
        return r16491323;
}
↓
double f(double x, double y) {
        double r16491324 = x;
        double r16491325 = y;
        double r16491326 = r16491324 / r16491325;
        double r16491327 = r16491326 / r16491325;
        return r16491327;
}

Error

Bits error versus x

Bits error versus y

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Results

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Target

Original9.8
Target0.2
Herbie0.2
\[\frac{\frac{x}{y}}{y}\]

Derivation

  1. Initial program 9.8

    \[\frac{x}{y \cdot y}\]
  2. Using strategy rm

  3. Applied associate-/r*0.2

    \[\leadsto \color{blue}{\frac{\frac{x}{y}}{y}}\]

  4. Final simplification0.2

    \[\leadsto \frac{\frac{x}{y}}{y}\]

Reproduce

herbie shell --seed 2019163 
(FPCore (x y)
  :name "Physics.ForceLayout:coulombForce from force-layout-0.4.0.2"

  :herbie-target
  (/ (/ x y) y)

  (/ x (* y y)))