Average Error: 0.0 → 0.0
Time: 591.0ms
Precision: 64
\[\left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003\]
↓
\[\left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003\]
\left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003
↓
\left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003
double f(double x, double y) {
        double r60581 = x;
        double r60582 = y;
        double r60583 = 1.0;
        double r60584 = r60582 - r60583;
        double r60585 = r60581 * r60584;
        double r60586 = 0.5;
        double r60587 = r60582 * r60586;
        double r60588 = r60585 - r60587;
        double r60589 = 0.918938533204673;
        double r60590 = r60588 + r60589;
        return r60590;
}
↓
double f(double x, double y) {
        double r60591 = x;
        double r60592 = y;
        double r60593 = 1.0;
        double r60594 = r60592 - r60593;
        double r60595 = r60591 * r60594;
        double r60596 = 0.5;
        double r60597 = r60592 * r60596;
        double r60598 = r60595 - r60597;
        double r60599 = 0.918938533204673;
        double r60600 = r60598 + r60599;
        return r60600;
}

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

    \[\left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003\]

  2. Final simplification0.0

    \[\leadsto \left(x \cdot \left(y - 1\right) - y \cdot 0.5\right) + 0.918938533204673003\]

Reproduce

herbie shell --seed 2020060 
(FPCore (x y)
  :name "Numeric.SpecFunctions:logGamma from math-functions-0.1.5.2, A"
  :precision binary64
  (+ (- (* x (- y 1)) (* y 0.5)) 0.918938533204673))