Average Error: 15.6 → 0.0
Time: 5.5s
Precision: 64
\[\frac{x + y}{\left(x \cdot 2\right) \cdot y}\]
↓
\[\frac{0.5}{x} + \frac{0.5}{y}\]
\frac{x + y}{\left(x \cdot 2\right) \cdot y}
↓
\frac{0.5}{x} + \frac{0.5}{y}
double f(double x, double y) {
        double r1167568 = x;
        double r1167569 = y;
        double r1167570 = r1167568 + r1167569;
        double r1167571 = 2.0;
        double r1167572 = r1167568 * r1167571;
        double r1167573 = r1167572 * r1167569;
        double r1167574 = r1167570 / r1167573;
        return r1167574;
}
↓
double f(double x, double y) {
        double r1167575 = 0.5;
        double r1167576 = x;
        double r1167577 = r1167575 / r1167576;
        double r1167578 = y;
        double r1167579 = r1167575 / r1167578;
        double r1167580 = r1167577 + r1167579;
        return r1167580;
}

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

Original15.6
Target0.0
Herbie0.0
\[\frac{0.5}{x} + \frac{0.5}{y}\]

Derivation

  1. Initial program 15.6

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

  2. Taylor expanded around 0 0.0

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

  3. Simplified0.0

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

  4. Final simplification0.0

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

Reproduce

herbie shell --seed 2020047 
(FPCore (x y)
  :name "Linear.Projection:inversePerspective from linear-1.19.1.3, C"
  :precision binary64

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

  (/ (+ x y) (* (* x 2) y)))