Average Error: 32.4 → 0
Time: 6.8s
Precision: 64
\[\frac{x}{x} - \frac{1}{x} \cdot \sqrt{x \cdot x}\]
↓
\[1 - \frac{\left|x\right|}{x}\]
\frac{x}{x} - \frac{1}{x} \cdot \sqrt{x \cdot x}
↓
1 - \frac{\left|x\right|}{x}
double f(double x) {
        double r3565969 = x;
        double r3565970 = r3565969 / r3565969;
        double r3565971 = 1.0;
        double r3565972 = r3565971 / r3565969;
        double r3565973 = r3565969 * r3565969;
        double r3565974 = sqrt(r3565973);
        double r3565975 = r3565972 * r3565974;
        double r3565976 = r3565970 - r3565975;
        return r3565976;
}
↓
double f(double x) {
        double r3565977 = 1.0;
        double r3565978 = x;
        double r3565979 = fabs(r3565978);
        double r3565980 = r3565979 / r3565978;
        double r3565981 = r3565977 - r3565980;
        return r3565981;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original32.4
Target0
Herbie0
\[\begin{array}{l} \mathbf{if}\;x \lt 0:\\ \;\;\;\;2\\ \mathbf{else}:\\ \;\;\;\;0\\ \end{array}\]

Derivation

  1. Initial program 32.4

    \[\frac{x}{x} - \frac{1}{x} \cdot \sqrt{x \cdot x}\]

  2. Simplified0

    \[\leadsto \color{blue}{1 - \frac{\left|x\right|}{x}}\]

  3. Final simplification0

    \[\leadsto 1 - \frac{\left|x\right|}{x}\]

Reproduce

herbie shell --seed 2019163 +o rules:numerics
(FPCore (x)
  :name "sqrt sqr"

  :herbie-target
  (if (< x 0) 2 0)

  (- (/ x x) (* (/ 1 x) (sqrt (* x x)))))