You remember about added function the SIMD = SSE41/SSE42/AVX/AVX2 for test codec SIMD. Otherwise SIMD is ignored.
I have improved these functions by default on SIMD codecs.
https://www.sendspace.com/file/l8udsu
I don't know why AVX2 doesn't works with mavx2. There are many descriptions that GCC doesn't work with AVX2 under Windows. Codec AVX2 works with additional functions. I don't know them.
Waiting for the next update 360, the current codec doesn't work.
As much as I could improve.