Average Error: 0 → 0
Time: 409.0ms
Precision: binary64
\[x \cdot 2 - 1\]
↓
\[x \cdot 2 - 1\]
x \cdot 2 - 1
↓
x \cdot 2 - 1
double code(double x) {
	return ((double) (((double) (x * 2.0)) - 1.0));
}
↓
double code(double x) {
	return ((double) (((double) (x * 2.0)) - 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 0

    \[x \cdot 2 - 1\]

  2. Final simplification0

    \[\leadsto x \cdot 2 - 1\]

Reproduce

herbie shell --seed 2020152 
(FPCore (x)
  :name "(- (* x 2) 1)"
  :precision binary64
  (- (* x 2.0) 1.0))