jianxind commented on pull request #7314:
URL: https://github.com/apache/arrow/pull/7314#issuecomment-647334741
> I think we also need a way of setting max runtime instruction set for
runtime dispatch (apologies if there is one and I missed it)
Thanks, currently no. But it can easily supported by hooking into
CpuInfo::Init(), tweak hardware_flags_ while checking the user ENV settings,
something like "ARROW_RUNTIME_SIMD_LEVEL=none make unittest".
For split PR without intrinsics, I will try to work this. Now I used some
compiler pragma(clang attribute push or GCC push_options) to support the
intrinsic API, it's defined to NULL for MSVC as MSVC supports directly using
intrinsic API without compiler flag. Need find a new method for new ways
without intrinsic, maybe something like set_source_files_properties can help
here.
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