Average Error: 15.2 → 0.0
Time: 11.5s
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 r168970172 = x;
        double r168970173 = y;
        double r168970174 = r168970172 - r168970173;
        double r168970175 = 2.0;
        double r168970176 = r168970172 * r168970175;
        double r168970177 = r168970176 * r168970173;
        double r168970178 = r168970174 / r168970177;
        return r168970178;
}
↓
double f(double x, double y) {
        double r168970179 = 0.5;
        double r168970180 = y;
        double r168970181 = r168970179 / r168970180;
        double r168970182 = x;
        double r168970183 = r168970179 / r168970182;
        double r168970184 = r168970181 - r168970183;
        return r168970184;
}

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

Original15.2
Target0.0
Herbie0.0
\[\frac{0.5}{y} - \frac{0.5}{x}\]

Derivation

  1. Initial program 15.2

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

  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

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

  4. Final simplification0.0

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

Reproduce

herbie shell --seed 2019173 
(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)))