Average Error: 0.0 → 0
Time: 527.0ms
Precision: 64
\[\frac{x \cdot y}{2}\]
↓
\[x \cdot \frac{y}{2}\]
\frac{x \cdot y}{2}
↓
x \cdot \frac{y}{2}
double f(double x, double y) {
        double r93489 = x;
        double r93490 = y;
        double r93491 = r93489 * r93490;
        double r93492 = 2.0;
        double r93493 = r93491 / r93492;
        return r93493;
}
↓
double f(double x, double y) {
        double r93494 = x;
        double r93495 = y;
        double r93496 = 2.0;
        double r93497 = r93495 / r93496;
        double r93498 = r93494 * r93497;
        return r93498;
}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

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

  3. Applied *-un-lft-identity0.0

    \[\leadsto \frac{x \cdot y}{\color{blue}{1 \cdot 2}}\]

  4. Applied times-frac0

    \[\leadsto \color{blue}{\frac{x}{1} \cdot \frac{y}{2}}\]

  5. Simplified0

    \[\leadsto \color{blue}{x} \cdot \frac{y}{2}\]

  6. Final simplification0

    \[\leadsto x \cdot \frac{y}{2}\]

Reproduce

herbie shell --seed 2020003 
(FPCore (x y)
  :name "Numeric.Interval.Internal:scale from intervals-0.7.1, B"
  :precision binary64
  (/ (* x y) 2))