Average Error: 10.1 → 0.2
Time: 5.1s
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 r448323 = x;
        double r448324 = y;
        double r448325 = r448324 * r448324;
        double r448326 = r448323 / r448325;
        return r448326;
}
↓
double f(double x, double y) {
        double r448327 = x;
        double r448328 = y;
        double r448329 = r448327 / r448328;
        double r448330 = r448329 / r448328;
        return r448330;
}

Error

Bits error versus x

Bits error versus y

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Results

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Target

Original10.1
Target0.2
Herbie0.2
\[\frac{\frac{x}{y}}{y}\]

Derivation

  1. Initial program 10.1

    \[\frac{x}{y \cdot y}\]
  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 2020045 
(FPCore (x y)
  :name "Physics.ForceLayout:coulombForce from force-layout-0.4.0.2"
  :precision binary64

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

  (/ x (* y y)))