Average Error: 14.6 → 0.0
Time: 8.1s
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 r28399471 = x;
        double r28399472 = y;
        double r28399473 = r28399471 + r28399472;
        double r28399474 = 2.0;
        double r28399475 = r28399471 * r28399474;
        double r28399476 = r28399475 * r28399472;
        double r28399477 = r28399473 / r28399476;
        return r28399477;
}
↓
double f(double x, double y) {
        double r28399478 = 0.5;
        double r28399479 = y;
        double r28399480 = r28399478 / r28399479;
        double r28399481 = x;
        double r28399482 = r28399478 / r28399481;
        double r28399483 = r28399480 + r28399482;
        return r28399483;
}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original14.6
Target0.0
Herbie0.0
\[\frac{0.5}{x} + \frac{0.5}{y}\]

Derivation

  1. Initial program 14.6

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

  2. Taylor expanded around 0 0.0

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

  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 2019164 
(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)))