Average Error: 0.0 → 0.1
Time: 11.1s
Precision: 64
Internal Precision: 384
\[e^{-\left(1 - x \cdot x\right)}\]
\[{e}^{\left(-1\right)} \cdot \left(\left(\sqrt[3]{{e}^{\left(x \cdot x\right)}} \cdot \sqrt[3]{{e}^{\left(x \cdot x\right)}}\right) \cdot \sqrt[3]{{e}^{\left(x \cdot x\right)}}\right)\]

Error

Bits error versus x

Derivation

  1. Initial program 0.0

    \[e^{-\left(1 - x \cdot x\right)}\]
  2. Using strategy rm
  3. Applied *-un-lft-identity0.0

    \[\leadsto e^{\color{blue}{1 \cdot \left(-\left(1 - x \cdot x\right)\right)}}\]
  4. Applied exp-prod0.0

    \[\leadsto \color{blue}{{\left(e^{1}\right)}^{\left(-\left(1 - x \cdot x\right)\right)}}\]
  5. Applied simplify0.0

    \[\leadsto {\color{blue}{e}}^{\left(-\left(1 - x \cdot x\right)\right)}\]
  6. Using strategy rm
  7. Applied sub-neg0.0

    \[\leadsto {e}^{\left(-\color{blue}{\left(1 + \left(-x \cdot x\right)\right)}\right)}\]
  8. Applied distribute-neg-in0.0

    \[\leadsto {e}^{\color{blue}{\left(\left(-1\right) + \left(-\left(-x \cdot x\right)\right)\right)}}\]
  9. Applied unpow-prod-up0.0

    \[\leadsto \color{blue}{{e}^{\left(-1\right)} \cdot {e}^{\left(-\left(-x \cdot x\right)\right)}}\]
  10. Applied simplify0.0

    \[\leadsto {e}^{\left(-1\right)} \cdot \color{blue}{{e}^{\left(x \cdot x\right)}}\]
  11. Using strategy rm
  12. Applied add-cube-cbrt0.1

    \[\leadsto {e}^{\left(-1\right)} \cdot \color{blue}{\left(\left(\sqrt[3]{{e}^{\left(x \cdot x\right)}} \cdot \sqrt[3]{{e}^{\left(x \cdot x\right)}}\right) \cdot \sqrt[3]{{e}^{\left(x \cdot x\right)}}\right)}\]

Runtime

Time bar (total: 11.1s)Debug logProfile

herbie shell --seed '#(1070609872 3456127585 2380521889 2328837196 1765472538 734540918)' 
(FPCore (x)
  :name "exp neg sub"
  (exp (- (- 1 (* x x)))))