https://bugs.kde.org/show_bug.cgi?id=499561
Mark Wielaard <m...@klomp.org> changed:
What |Removed |Added
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CC| |m...@klomp.org
--- Comment #2 from Mark Wielaard <m...@klomp.org> ---
(In reply to dnovomesky from comment #0)
> on Gentoo Linux on AMD Ryzen 5, valgrind sees unrecognized instruction in
> Qt's library when it is compiled using -march=native switch.
Note that in general -march=native won't work when run under valgrind since the
"native" cpu instructions might not be supported by valgrind (as is the case
here). Your program should really check the cpuid during runtime.
(In reply to Paul Floyd from comment #1)
> Looks like that is "vaesenc ymm1,ymm0,ymm1".
>
> From what I see we support the 128bit xmm version but not 256bit ymm.
Note that the 256bit variant is only supported when the VAES CPUID bit is set
(technically not part of AVX512 but normally an addition to).
See https://en.wikipedia.org/wiki/AVX-512#VAES
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