Average Error: 16.6 → 0.0
Time: 21.1s
Precision: 64
\[x + \left(1 - x\right) \cdot \left(1 - y\right)\]
↓
\[\left(x \cdot y + \left(-1\right) \cdot y\right) + 1\]
x + \left(1 - x\right) \cdot \left(1 - y\right)
↓
\left(x \cdot y + \left(-1\right) \cdot y\right) + 1
double f(double x, double y) {
        double r1182097 = x;
        double r1182098 = 1.0;
        double r1182099 = r1182098 - r1182097;
        double r1182100 = y;
        double r1182101 = r1182098 - r1182100;
        double r1182102 = r1182099 * r1182101;
        double r1182103 = r1182097 + r1182102;
        return r1182103;
}
↓
double f(double x, double y) {
        double r1182104 = x;
        double r1182105 = y;
        double r1182106 = r1182104 * r1182105;
        double r1182107 = 1.0;
        double r1182108 = -r1182107;
        double r1182109 = r1182108 * r1182105;
        double r1182110 = r1182106 + r1182109;
        double r1182111 = r1182110 + r1182107;
        return r1182111;
}

Error

Bits error versus x

Bits error versus y

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Results

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Target

Original16.6
Target0.0
Herbie0.0
\[y \cdot x - \left(y - 1\right)\]

Derivation

  1. Initial program 16.6

    \[x + \left(1 - x\right) \cdot \left(1 - y\right)\]

  2. Taylor expanded around 0 0.0

    \[\leadsto \color{blue}{\left(x \cdot y + 1\right) - 1 \cdot y}\]

  3. Simplified0.0

    \[\leadsto \color{blue}{y \cdot \left(x - 1\right) + 1}\]
  4. Using strategy rm

  5. Applied sub-neg0.0

    \[\leadsto y \cdot \color{blue}{\left(x + \left(-1\right)\right)} + 1\]

  6. Applied distribute-lft-in0.0

    \[\leadsto \color{blue}{\left(y \cdot x + y \cdot \left(-1\right)\right)} + 1\]

  7. Simplified0.0

    \[\leadsto \left(\color{blue}{x \cdot y} + y \cdot \left(-1\right)\right) + 1\]

  8. Simplified0.0

    \[\leadsto \left(x \cdot y + \color{blue}{\left(-1\right) \cdot y}\right) + 1\]

  9. Final simplification0.0

    \[\leadsto \left(x \cdot y + \left(-1\right) \cdot y\right) + 1\]

Reproduce

herbie shell --seed 2020047 
(FPCore (x y)
  :name "Graphics.Rendering.Chart.Plot.Vectors:renderPlotVectors from Chart-1.5.3"
  :precision binary64

  :herbie-target
  (- (* y x) (- y 1))

  (+ x (* (- 1 x) (- 1 y))))