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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/100758] __builtin_cpu_supports does not (always) detect
 "sse2"
Date: Fri, 10 Feb 2023 09:45:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100758

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WONTFIX                     |FIXED

--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe in the #c20 case you'd get
FEATURE_CMOV
FEATURE_MMX
FEATURE_SSE
FEATURE_SSE2
FEATURE_CMPXCHG8B
FEATURE_FXSAVE
FEATURE_POPCNT
FEATURE_SSE3
FEATURE_SSSE3
FEATURE_SSE4_1
FEATURE_CMPXCHG16B
FEATURE_LAHF_LM
FEATURE_LM
FEATURE_X86_64_BASELINE
set and in the #c21 case
FEATURE_CMOV
FEATURE_MMX
FEATURE_SSE
FEATURE_SSE2
FEATURE_CMPXCHG8B
FEATURE_FXSAVE
FEATURE_SSE3
If that matches what those CPUs provide (say compared to /proc/cpuinfo), th=
en I
think we are good.  The change has been committed to trunk already, so you =
can
try it yourself (or apply the commit patch to say gcc 12).=