Average Error: 5.7 → 0
Time: 3.8s
Precision: 64
\[e^{\log a + \log b}\]
↓
\[a \cdot b\]
e^{\log a + \log b}
↓
a \cdot b
double f(double a, double b) {
        double r5038108 = a;
        double r5038109 = log(r5038108);
        double r5038110 = b;
        double r5038111 = log(r5038110);
        double r5038112 = r5038109 + r5038111;
        double r5038113 = exp(r5038112);
        return r5038113;
}
↓
double f(double a, double b) {
        double r5038114 = a;
        double r5038115 = b;
        double r5038116 = r5038114 * r5038115;
        return r5038116;
}

Error

Bits error versus a

Bits error versus b

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original5.7
Target0
Herbie0
\[a \cdot b\]

Derivation

  1. Initial program 5.7

    \[e^{\log a + \log b}\]

  2. Simplified0

    \[\leadsto \color{blue}{a \cdot b}\]

  3. Final simplification0

    \[\leadsto a \cdot b\]

Reproduce

herbie shell --seed 2019130 
(FPCore (a b)
  :name "Exp of sum of logs"

  :herbie-target
  (* a b)

  (exp (+ (log a) (log b))))