Okay, here's a 0.4b with PHI2 support. I don't believe it's the fastest, but that's what I have at the moment. Further improvements will come out later.

CUDA 9.1 https://mega.nz/#!XF8nFIJK!gLhkJHu8-FJVsdXLjec0BMw0-KrgD2_8A6rqk5iYyfY