Average Error: 15.9 → 0.0
Time: 5.6m
Precision: 64
\[\frac{x + y}{\left(x \cdot 2\right) \cdot y}\]
↓
\[\frac{0.5}{y} + \frac{0.5}{x}\]
\frac{x + y}{\left(x \cdot 2\right) \cdot y}
↓
\frac{0.5}{y} + \frac{0.5}{x}
double f(double x, double y) {
        double r1118770 = x;
        double r1118771 = y;
        double r1118772 = r1118770 + r1118771;
        double r1118773 = 2.0;
        double r1118774 = r1118770 * r1118773;
        double r1118775 = r1118774 * r1118771;
        double r1118776 = r1118772 / r1118775;
        return r1118776;
}
↓
double f(double x, double y) {
        double r1118777 = 0.5;
        double r1118778 = y;
        double r1118779 = r1118777 / r1118778;
        double r1118780 = x;
        double r1118781 = r1118777 / r1118780;
        double r1118782 = r1118779 + r1118781;
        return r1118782;
}

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

Original15.9
Target0.0
Herbie0.0
\[\frac{0.5}{x} + \frac{0.5}{y}\]

Derivation

  1. Initial program 15.9

    \[\frac{x + y}{\left(x \cdot 2\right) \cdot y}\]

  2. Taylor expanded around 0 0.0

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

  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 2019195 
(FPCore (x y)
  :name "Linear.Projection:inversePerspective from linear-1.19.1.3, C"

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

  (/ (+ x y) (* (* x 2.0) y)))