geohot reverse engineered ANE last year, for his tinygrad project, <a href="https://github.com/geohot/tinygrad" rel="nofollow">https://github.com/geohot/tinygrad</a>
He streamed the many-hours efforts on Youtube, in case this is your thing:
<a href="https://m.youtube.com/watch?v=mwmke957ki4" rel="nofollow">https://m.youtube.com/watch?v=mwmke957ki4</a>