Average Error: 0.0 → 0
Time: 7.1s
Precision: 64
\[x + \frac{y - x}{2.0}\]
↓
\[\left(y + x\right) \cdot 0.5\]
x + \frac{y - x}{2.0}
↓
\left(y + x\right) \cdot 0.5
double f(double x, double y) {
        double r23671917 = x;
        double r23671918 = y;
        double r23671919 = r23671918 - r23671917;
        double r23671920 = 2.0;
        double r23671921 = r23671919 / r23671920;
        double r23671922 = r23671917 + r23671921;
        return r23671922;
}
↓
double f(double x, double y) {
        double r23671923 = y;
        double r23671924 = x;
        double r23671925 = r23671923 + r23671924;
        double r23671926 = 0.5;
        double r23671927 = r23671925 * r23671926;
        return r23671927;
}

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
Herbie0
\[0.5 \cdot \left(x + y\right)\]

Derivation

  1. Initial program 0.0

    \[x + \frac{y - x}{2.0}\]

  2. Taylor expanded around 0 0

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

  3. Simplified0

    \[\leadsto \color{blue}{\left(x + y\right) \cdot 0.5}\]

  4. Final simplification0

    \[\leadsto \left(y + x\right) \cdot 0.5\]

Reproduce

herbie shell --seed 2019162 
(FPCore (x y)
  :name "Numeric.Interval.Internal:bisect from intervals-0.7.1, A"

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

  (+ x (/ (- y x) 2.0)))