I believe this was on hn recently (uses icestorm as mentioned by others): http://www.excamera.com/sphinx/article-j1a-swapforth.html http://www.excamera.com/sph

I believe this was on hn recently (uses icestorm as mentioned by others): http://www.excamera.com/sphinx/article-j1a-swapforth.html http://www.excamera.com/sphinx/article-j1a-swapforth.html