Average Error: 10.3 → 0.2
Time: 9.0s
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 r13316179 = x;
        double r13316180 = y;
        double r13316181 = r13316180 * r13316180;
        double r13316182 = r13316179 / r13316181;
        return r13316182;
}
↓
double f(double x, double y) {
        double r13316183 = x;
        double r13316184 = y;
        double r13316185 = r13316183 / r13316184;
        double r13316186 = r13316185 / r13316184;
        return r13316186;
}

Error

Bits error versus x

Bits error versus y

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Results

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Target

Original10.3
Target0.2
Herbie0.2
\[\frac{\frac{x}{y}}{y}\]

Derivation

  1. Initial program 10.3

    \[\frac{x}{y \cdot y}\]
  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 2019174 +o rules:numerics
(FPCore (x y)
  :name "Physics.ForceLayout:coulombForce from force-layout-0.4.0.2"

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

  (/ x (* y y)))