Average Error: 0.0 → 0.0
Time: 2.6s
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 r81051 = x;
        double r81052 = y;
        double r81053 = 1.0;
        double r81054 = r81052 - r81053;
        double r81055 = r81051 * r81054;
        double r81056 = 0.5;
        double r81057 = r81052 * r81056;
        double r81058 = r81055 - r81057;
        double r81059 = 0.918938533204673;
        double r81060 = r81058 + r81059;
        return r81060;
}
↓
double f(double x, double y) {
        double r81061 = x;
        double r81062 = y;
        double r81063 = 1.0;
        double r81064 = r81062 - r81063;
        double r81065 = r81061 * r81064;
        double r81066 = 0.5;
        double r81067 = r81062 * r81066;
        double r81068 = r81065 - r81067;
        double r81069 = 0.918938533204673;
        double r81070 = r81068 + r81069;
        return r81070;
}

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 2020062 
(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))