Average Error: 0.0 → 0.0
Time: 1.5s
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 r56031 = x;
        double r56032 = y;
        double r56033 = 1.0;
        double r56034 = r56032 - r56033;
        double r56035 = r56031 * r56034;
        double r56036 = 0.5;
        double r56037 = r56032 * r56036;
        double r56038 = r56035 - r56037;
        double r56039 = 0.918938533204673;
        double r56040 = r56038 + r56039;
        return r56040;
}
↓
double f(double x, double y) {
        double r56041 = x;
        double r56042 = y;
        double r56043 = 1.0;
        double r56044 = r56042 - r56043;
        double r56045 = r56041 * r56044;
        double r56046 = 0.5;
        double r56047 = r56042 * r56046;
        double r56048 = r56045 - r56047;
        double r56049 = 0.918938533204673;
        double r56050 = r56048 + r56049;
        return r56050;
}

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 2020049 
(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))