enable SIMD on power9 for bitshuffle filter #90
Merged
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This PR supersedes PR #89.
It is based on PR #89, but avoids to modify
src/bitshuffle
by setting macros fromsetup.py
.It also enables SSE2 support for ppc64le in a generic way.
Finally it prevents blosc to use SSE2 shuffle implementation on power9 since this implementation relies on x86 assembly code.