Average Error: 32.0 → 0
Time: 2.3s
Precision: 64
Internal Precision: 1344
\[\frac{x}{x} - \frac{1}{x} \cdot \sqrt{x \cdot x}\]
↓
\[1 - \frac{\left|x\right|}{x}\]

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original32.0
Target0
Herbie0
\[\begin{array}{l} \mathbf{if}\;x \lt 0:\\ \;\;\;\;2\\ \mathbf{else}:\\ \;\;\;\;0\\ \end{array}\]

Derivation

  1. Initial program 32.0

    \[\frac{x}{x} - \frac{1}{x} \cdot \sqrt{x \cdot x}\]

  2. Initial simplification31.0

    \[\leadsto (\left(\frac{-1}{x}\right) \cdot \left(\left|x\right|\right) + 1)_*\]

  3. Taylor expanded around -inf 0

    \[\leadsto \color{blue}{1 - \frac{\left|x\right|}{x}}\]

  4. Final simplification0

    \[\leadsto 1 - \frac{\left|x\right|}{x}\]

Runtime

Time bar (total: 2.3s)Debug logProfile

herbie shell --seed 2018250 +o rules:numerics
(FPCore (x)
  :name "sqrt sqr"

  :herbie-target
  (if (< x 0) 2 0)

  (- (/ x x) (* (/ 1 x) (sqrt (* x x)))))