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[Bug libfortran/78379] Processor-specific versions for matmul
- From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 07 May 2017 10:41:55 +0000
- Subject: [Bug libfortran/78379] Processor-specific versions for matmul
- Auto-submitted: auto-generated
- References: <bug-78379-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78379
--- Comment #30 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I think there still is one thing to do.
Apparently, AMD CPUs (which use only vanilla at
the moment) are slightly faster with -mprefer-avx128,
and they should be much faster if they have FMA3.
Unless I missed something, it is not possible to
specify something like -mprefer-avx128 as a target
attribute.
What would be the best way to go about this?