Average Error: 14.3 → 0.0
Time: 14.1s
Precision: 64
\[\frac{x - y}{\left(x \cdot 2.0\right) \cdot y}\]
↓
\[\frac{0.5}{y} - \frac{0.5}{x}\]
\frac{x - y}{\left(x \cdot 2.0\right) \cdot y}
↓
\frac{0.5}{y} - \frac{0.5}{x}
double f(double x, double y) {
        double r24094964 = x;
        double r24094965 = y;
        double r24094966 = r24094964 - r24094965;
        double r24094967 = 2.0;
        double r24094968 = r24094964 * r24094967;
        double r24094969 = r24094968 * r24094965;
        double r24094970 = r24094966 / r24094969;
        return r24094970;
}
↓
double f(double x, double y) {
        double r24094971 = 0.5;
        double r24094972 = y;
        double r24094973 = r24094971 / r24094972;
        double r24094974 = x;
        double r24094975 = r24094971 / r24094974;
        double r24094976 = r24094973 - r24094975;
        return r24094976;
}

Error

Bits error versus x

Bits error versus y

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original14.3
Target0.0
Herbie0.0
\[\frac{0.5}{y} - \frac{0.5}{x}\]

Derivation

  1. Initial program 14.3

    \[\frac{x - y}{\left(x \cdot 2.0\right) \cdot y}\]

  2. Taylor expanded around 0 0.0

    \[\leadsto \color{blue}{0.5 \cdot \frac{1}{y} - 0.5 \cdot \frac{1}{x}}\]

  3. Simplified0.0

    \[\leadsto \color{blue}{\frac{0.5}{y} - \frac{0.5}{x}}\]

  4. Final simplification0.0

    \[\leadsto \frac{0.5}{y} - \frac{0.5}{x}\]

Reproduce

herbie shell --seed 2019168 +o rules:numerics
(FPCore (x y)
  :name "Linear.Projection:inversePerspective from linear-1.19.1.3, B"

  :herbie-target
  (- (/ 0.5 y) (/ 0.5 x))

  (/ (- x y) (* (* x 2.0) y)))