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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/31335] Compile glibc with -march=x86-64-v3 should disable
 FMA4 multi-arch version
Date: Sun, 25 Feb 2024 23:17:08 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31335

--- Comment #2 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Sunil Pandey <skpgkp2@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3D9f78a7c1d0963282608=
da836b840f0d5ae1c478e

commit 9f78a7c1d0963282608da836b840f0d5ae1c478e
Author: Sunil K Pandey <skpgkp2@gmail.com>
Date:   Tue Feb 13 12:23:14 2024 -0800

    x86_64: Exclude SSE, AVX and FMA4 variants in libm multiarch

    When glibc is built with ISA level 3 or higher by default, the resulting
    glibc binaries won't run on SSE or FMA4 processors.  Exclude SSE, AVX a=
nd
    FMA4 variants in libm multiarch when ISA level 3 or higher is enabled by
    default.

    When glibc is built with ISA level 2 enabled by default, only keep SSE4=
.1
    variant.

    Fixes BZ 31335.

    NB: elf/tst-valgrind-smoke test fails with ISA level 4, because valgrind
    doesn't support AVX512 instructions:

    https://bugs.kde.org/show_bug.cgi?id=3D383010

    Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

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