Sam Varshavchik wrote:
> Linux thinkpad 5.5.16-200.fc31.x86_64 #1 SMP Wed Apr 8 16:43:33 UTC 2020
> x86_64 x86_64 x86_64 GNU/Linux
> [
> /proc/cpuinfo:
>
> flags : ... avx ...
And even that is not safe to assume.
The baseline is SSE2, nothing more. No SSE3, SSSE3, SSE4.1, SSE4.2, AVX(1),
AVX2, and most definitely no AVX-512 (none of the defined subsets of it).
For any of these, CPU support MUST be detected at runtime before attempting
to use them.
Kevin Kofler
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