Main:bigenough1 from B

Average Error: 0.0 → 0

Time: 504.0ms

Precision: 64

Math

\[x + x \cdot x\]

↓

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

C

double f(double x) {
        double r92507 = x;
        double r92508 = r92507 * r92507;
        double r92509 = r92507 + r92508;
        return r92509;
}

↓

double f(double x) {
        double r92510 = x;
        double r92511 = fma(r92510, r92510, r92510);
        return r92511;
}

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 2019354 +o rules:numerics
(FPCore (x)
  :name "Main:bigenough1 from B"
  :precision binary64
  (+ x (* x x)))