Average Error: 0.0 → 0.0
Time: 10.9s
Precision: 64
\[\frac{x + y}{x - y}\]
↓
\[\log \left(e^{\frac{y + x}{x - y}}\right)\]
\frac{x + y}{x - y}
↓
\log \left(e^{\frac{y + x}{x - y}}\right)
double f(double x, double y) {
        double r25847137 = x;
        double r25847138 = y;
        double r25847139 = r25847137 + r25847138;
        double r25847140 = r25847137 - r25847138;
        double r25847141 = r25847139 / r25847140;
        return r25847141;
}
↓
double f(double x, double y) {
        double r25847142 = y;
        double r25847143 = x;
        double r25847144 = r25847142 + r25847143;
        double r25847145 = r25847143 - r25847142;
        double r25847146 = r25847144 / r25847145;
        double r25847147 = exp(r25847146);
        double r25847148 = log(r25847147);
        return r25847148;
}

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 add-log-exp0.0

    \[\leadsto \color{blue}{\log \left(e^{\frac{x + y}{x - y}}\right)}\]

  4. Final simplification0.0

    \[\leadsto \log \left(e^{\frac{y + x}{x - y}}\right)\]

Reproduce

herbie shell --seed 2019163 
(FPCore (x y)
  :name "Linear.Projection:perspective from linear-1.19.1.3, A"

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

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