Average Error: 30.7 → 30.7
Time: 1.3s
Precision: binary64
\[\mathsf{log1p}\left(x - 1\right)\]
↓
\[\mathsf{log1p}\left(x - 1\right)\]
\mathsf{log1p}\left(x - 1\right)
↓
\mathsf{log1p}\left(x - 1\right)
double code(double x) {
	return ((double) log1p(((double) (x - 1.0))));
}
↓
double code(double x) {
	return ((double) log1p(((double) (x - 1.0))));
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 30.7

    \[\mathsf{log1p}\left(x - 1\right)\]

  2. Final simplification30.7

    \[\leadsto \mathsf{log1p}\left(x - 1\right)\]

Reproduce

herbie shell --seed 2020152 
(FPCore (x)
  :name "(log1p (- x 1))"
  :precision binary64
  (log1p (- x 1.0)))