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Subject: [Bug math/28252] Unnecessary memory load in AVX512 SVML codes
Date: Mon, 02 May 2022 21:30:30 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28252

--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The release/2.33/master branch has been updated by Sunil Pandey
<skpgkp2@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3Dc09d92d4f657560bf88=
4c735bc8fdd53e4276367

commit c09d92d4f657560bf884c735bc8fdd53e4276367
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Aug 20 06:42:24 2021 -0700

    x86-64: Optimize load of all bits set into ZMM register [BZ #28252]

    Optimize loads of all bits set into ZMM register in AVX512 SVML codes
    by replacing

            vpbroadcastq .L_2il0floatpacket.16(%rip), %zmmX

    and

            vmovups   .L_2il0floatpacket.13(%rip), %zmmX

    with
            vpternlogd $0xff, %zmmX, %zmmX, %zmmX

    This fixes BZ #28252.

    (cherry picked from commit 78c9ec9000f873abe7a15a91b87080a2e4308260)

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