Average Error: 0.3 → 0
Time: 820.0ms
Precision: 64
\[d \cdot 10 + d \cdot 20\]
↓
\[d \cdot 30\]
d \cdot 10 + d \cdot 20
↓
d \cdot 30
double f(double d) {
        double r8395881 = d;
        double r8395882 = 10.0;
        double r8395883 = r8395881 * r8395882;
        double r8395884 = 20.0;
        double r8395885 = r8395881 * r8395884;
        double r8395886 = r8395883 + r8395885;
        return r8395886;
}
↓
double f(double d) {
        double r8395887 = d;
        double r8395888 = 30.0;
        double r8395889 = r8395887 * r8395888;
        return r8395889;
}

Error

Bits error versus d

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.3
Target0
Herbie0
\[d \cdot 30\]

Derivation

  1. Initial program 0.3

    \[d \cdot 10 + d \cdot 20\]

  2. Simplified0

    \[\leadsto \color{blue}{d \cdot 30}\]

  3. Final simplification0

    \[\leadsto d \cdot 30\]

Reproduce

herbie shell --seed 2019158 +o rules:numerics
(FPCore (d)
  :name "FastMath test1"

  :herbie-target
  (* d 30)

  (+ (* d 10) (* d 20)))