Average Error: 0.0 → 0.0
Time: 1.8s
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 r32309 = x;
        double r32310 = y;
        double r32311 = 1.0;
        double r32312 = r32310 - r32311;
        double r32313 = r32309 * r32312;
        double r32314 = 0.5;
        double r32315 = r32310 * r32314;
        double r32316 = r32313 - r32315;
        double r32317 = 0.918938533204673;
        double r32318 = r32316 + r32317;
        return r32318;
}
↓
double f(double x, double y) {
        double r32319 = x;
        double r32320 = y;
        double r32321 = 1.0;
        double r32322 = r32320 - r32321;
        double r32323 = r32319 * r32322;
        double r32324 = 0.5;
        double r32325 = r32320 * r32324;
        double r32326 = r32323 - r32325;
        double r32327 = 0.918938533204673;
        double r32328 = r32326 + r32327;
        return r32328;
}

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 2020034 
(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))