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 r63354 = x;
        double r63355 = y;
        double r63356 = 1.0;
        double r63357 = r63355 - r63356;
        double r63358 = r63354 * r63357;
        double r63359 = 0.5;
        double r63360 = r63355 * r63359;
        double r63361 = r63358 - r63360;
        double r63362 = 0.918938533204673;
        double r63363 = r63361 + r63362;
        return r63363;
}
↓
double f(double x, double y) {
        double r63364 = x;
        double r63365 = y;
        double r63366 = 1.0;
        double r63367 = r63365 - r63366;
        double r63368 = r63364 * r63367;
        double r63369 = 0.5;
        double r63370 = r63365 * r63369;
        double r63371 = r63368 - r63370;
        double r63372 = 0.918938533204673;
        double r63373 = r63371 + r63372;
        return r63373;
}

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 2020039 
(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))