Main:bigenough1 from B

Average Error: 0.0 → 0

Time: 3.9s

Precision: 64

Math

\[x + x \cdot x\]

↓

\[\mathsf{fma}\left(x, x, x\right)\]

C

double f(double x) {
        double r5739861 = x;
        double r5739862 = r5739861 * r5739861;
        double r5739863 = r5739861 + r5739862;
        return r5739863;
}

↓

double f(double x) {
        double r5739864 = x;
        double r5739865 = fma(r5739864, r5739864, r5739864);
        return r5739865;
}

Error

Bits error versus x

Derivation

1. Initial program 0.0

   \[x + x \cdot x\]

2. Simplified 0

   \[\leadsto \color{blue}{\mathsf{fma}\left(x, x, x\right)}\]

3. Final simplification 0

   \[\leadsto \mathsf{fma}\left(x, x, x\right)\]

Reproduce

herbie shell --seed 2019172 +o rules:numerics
(FPCore (x)
  :name "Main:bigenough1 from B"
  (+ x (* x x)))