\[\left(\frac{1}{6} \cdot {\left(-2 \cdot \log u1\right)}^{0.5}\right) \cdot \cos \left(\left(2 \cdot \pi\right) \cdot u2\right) + 0.5\]
Test:
normal distribution
Bits:
128 bits
Bits error versus u1
Bits error versus u2
Time: 10.0 s
Input Error: 0.4
Output Error: 0.4
Log:
Profile: 🕒
\((\frac{1}{6} * \left({\left({\left(\log u1\right)}^{1.0} \cdot {-2}^{1.0}\right)}^{0.5} \cdot \cos \left(\left(u2 \cdot 2\right) \cdot \pi\right)\right) + 0.5)_*\)
  1. Started with
    \[\left(\frac{1}{6} \cdot {\left(-2 \cdot \log u1\right)}^{0.5}\right) \cdot \cos \left(\left(2 \cdot \pi\right) \cdot u2\right) + 0.5\]
    0.4
  2. Applied simplify to get
    \[\color{red}{\left(\frac{1}{6} \cdot {\left(-2 \cdot \log u1\right)}^{0.5}\right) \cdot \cos \left(\left(2 \cdot \pi\right) \cdot u2\right) + 0.5} \leadsto \color{blue}{(\left(\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6}\right) * \left(\cos \left(\pi \cdot \left(u2 \cdot 2\right)\right)\right) + 0.5)_*}\]
    0.4
  3. Using strategy rm
    0.4
  4. Applied fma-udef to get
    \[\color{red}{(\left(\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6}\right) * \left(\cos \left(\pi \cdot \left(u2 \cdot 2\right)\right)\right) + 0.5)_*} \leadsto \color{blue}{\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6} \cdot \cos \left(\pi \cdot \left(u2 \cdot 2\right)\right) + 0.5}\]
    0.4
  5. Using strategy rm
    0.4
  6. Applied add-cube-cbrt to get
    \[\color{red}{\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6} \cdot \cos \left(\pi \cdot \left(u2 \cdot 2\right)\right)} + 0.5 \leadsto \color{blue}{{\left(\sqrt[3]{\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6} \cdot \cos \left(\pi \cdot \left(u2 \cdot 2\right)\right)}\right)}^3} + 0.5\]
    0.7
  7. Applied taylor to get
    \[{\left(\sqrt[3]{\frac{{\left(-2 \cdot \log u1\right)}^{0.5}}{6} \cdot \cos \left(\pi \cdot \left(u2 \cdot 2\right)\right)}\right)}^3 + 0.5 \leadsto {\left(\sqrt[3]{\frac{1}{6} \cdot \left({\left({-2}^{1.0} \cdot {\left(\log u1\right)}^{1.0}\right)}^{0.5} \cdot \cos \left(2 \cdot \left(\pi \cdot u2\right)\right)\right)}\right)}^3 + 0.5\]
    0.8
  8. Taylor expanded around 0 to get
    \[{\color{red}{\left(\sqrt[3]{\frac{1}{6} \cdot \left({\left({-2}^{1.0} \cdot {\left(\log u1\right)}^{1.0}\right)}^{0.5} \cdot \cos \left(2 \cdot \left(\pi \cdot u2\right)\right)\right)}\right)}}^3 + 0.5 \leadsto {\color{blue}{\left(\sqrt[3]{\frac{1}{6} \cdot \left({\left({-2}^{1.0} \cdot {\left(\log u1\right)}^{1.0}\right)}^{0.5} \cdot \cos \left(2 \cdot \left(\pi \cdot u2\right)\right)\right)}\right)}}^3 + 0.5\]
    0.8
  9. Applied simplify to get
    \[{\left(\sqrt[3]{\frac{1}{6} \cdot \left({\left({-2}^{1.0} \cdot {\left(\log u1\right)}^{1.0}\right)}^{0.5} \cdot \cos \left(2 \cdot \left(\pi \cdot u2\right)\right)\right)}\right)}^3 + 0.5 \leadsto (\frac{1}{6} * \left({\left({\left(\log u1\right)}^{1.0} \cdot {-2}^{1.0}\right)}^{0.5} \cdot \cos \left(\left(u2 \cdot 2\right) \cdot \pi\right)\right) + 0.5)_*\]
    0.4

  10. Applied final simplification

Original test:


(lambda ((u1 (uniform 0 1)) (u2 (uniform 0 1)))
  #:name "normal distribution"
  (+ (* (* (/ 1 6) (pow (* -2 (log u1)) 0.5)) (cos (* (* 2 PI) u2))) 0.5))