Average Error: 0.1 → 0.1
Time: 17.7s
Precision: 64
\[x + \frac{x - y}{2.0}\]
↓
\[1.5 \cdot x - 0.5 \cdot y\]
x + \frac{x - y}{2.0}
↓
1.5 \cdot x - 0.5 \cdot y
double f(double x, double y) {
        double r34012649 = x;
        double r34012650 = y;
        double r34012651 = r34012649 - r34012650;
        double r34012652 = 2.0;
        double r34012653 = r34012651 / r34012652;
        double r34012654 = r34012649 + r34012653;
        return r34012654;
}
↓
double f(double x, double y) {
        double r34012655 = 1.5;
        double r34012656 = x;
        double r34012657 = r34012655 * r34012656;
        double r34012658 = 0.5;
        double r34012659 = y;
        double r34012660 = r34012658 * r34012659;
        double r34012661 = r34012657 - r34012660;
        return r34012661;
}

Error

Bits error versus x

Bits error versus y

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.1
Target0.1
Herbie0.1
\[1.5 \cdot x - 0.5 \cdot y\]

Derivation

  1. Initial program 0.1

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

  2. Taylor expanded around 0 0.1

    \[\leadsto \color{blue}{1.5 \cdot x - 0.5 \cdot y}\]

  3. Final simplification0.1

    \[\leadsto 1.5 \cdot x - 0.5 \cdot y\]

Reproduce

herbie shell --seed 2019163 
(FPCore (x y)
  :name "Graphics.Rendering.Chart.Axis.Types:hBufferRect from Chart-1.5.3"

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

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