Average Error: 0.0 → 0.0
Time: 7.3s
Precision: 64
\[e^{-\left(1 - x \cdot x\right)}\]
↓
\[e^{-\left(1 - x \cdot x\right)}\]
e^{-\left(1 - x \cdot x\right)}
↓
e^{-\left(1 - x \cdot x\right)}
double f(double x) {
        double r935989 = 1.0;
        double r935990 = x;
        double r935991 = r935990 * r935990;
        double r935992 = r935989 - r935991;
        double r935993 = -r935992;
        double r935994 = exp(r935993);
        return r935994;
}
↓
double f(double x) {
        double r935995 = 1.0;
        double r935996 = x;
        double r935997 = r935996 * r935996;
        double r935998 = r935995 - r935997;
        double r935999 = -r935998;
        double r936000 = exp(r935999);
        return r936000;
}

Error

Bits error versus x

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Results

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Derivation

  1. Initial program 0.0

    \[e^{-\left(1 - x \cdot x\right)}\]

  2. Final simplification0.0

    \[\leadsto e^{-\left(1 - x \cdot x\right)}\]

Reproduce

herbie shell --seed 2019152 
(FPCore (x)
  :name "exp neg sub"
  (exp (- (- 1 (* x x)))))