Average Error: 0.0 → 0.0
Time: 13.1s
Precision: 64
\[\frac{x + y}{x - y}\]
↓
\[\frac{1}{\frac{x}{x + y} - \frac{1}{\frac{x + y}{y}}}\]
\frac{x + y}{x - y}
↓
\frac{1}{\frac{x}{x + y} - \frac{1}{\frac{x + y}{y}}}
double f(double x, double y) {
        double r384331 = x;
        double r384332 = y;
        double r384333 = r384331 + r384332;
        double r384334 = r384331 - r384332;
        double r384335 = r384333 / r384334;
        return r384335;
}
↓
double f(double x, double y) {
        double r384336 = 1.0;
        double r384337 = x;
        double r384338 = y;
        double r384339 = r384337 + r384338;
        double r384340 = r384337 / r384339;
        double r384341 = r384339 / r384338;
        double r384342 = r384336 / r384341;
        double r384343 = r384340 - r384342;
        double r384344 = r384336 / r384343;
        return r384344;
}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.0
Target0.0
Herbie0.0
\[\frac{1}{\frac{x}{x + y} - \frac{y}{x + y}}\]

Derivation

  1. Initial program 0.0

    \[\frac{x + y}{x - y}\]
  2. Using strategy rm

  3. Applied clear-num0.0

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

  4. Simplified0.0

    \[\leadsto \frac{1}{\color{blue}{\frac{x - y}{y + x}}}\]
  5. Using strategy rm

  6. Applied div-sub0.0

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

  7. Simplified0.0

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

  8. Simplified0.0

    \[\leadsto \frac{1}{\frac{x}{x + y} - \color{blue}{\frac{y}{x + y}}}\]
  9. Using strategy rm

  10. Applied clear-num0.0

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

  11. Final simplification0.0

    \[\leadsto \frac{1}{\frac{x}{x + y} - \frac{1}{\frac{x + y}{y}}}\]

Reproduce

herbie shell --seed 2019323 
(FPCore (x y)
  :name "Linear.Projection:perspective from linear-1.19.1.3, A"
  :precision binary64

  :herbie-target
  (/ 1 (- (/ x (+ x y)) (/ y (+ x y))))

  (/ (+ x y) (- x y)))