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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/110054] stdx::simd masked store should not use
 non-temporal store instruction
Date: Wed, 08 May 2024 16:14:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110054

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Matthias Kretz
<mkretz@gcc.gnu.org>:

https://gcc.gnu.org/g:e60ec9b0e02e8647c289d204342e992e91750011

commit r12-10422-ge60ec9b0e02e8647c289d204342e992e91750011
Author: Matthias Kretz <m.kretz@gsi.de>
Date:   Fri Jun 2 13:44:22 2023 +0200

    libstdc++: Replace use of incorrect non-temporal store

    The call to the base implementation sometimes didn't find a matching
    signature because the _Abi parameter of _SimdImpl* was "wrong" after
    conversion. It has to call into <new ABI tag>::_SimdImpl instead of the
    current ABI tag's _SimdImpl. This also reduces the number of possible
    template instantiations.

    Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

    libstdc++-v3/ChangeLog:

            PR libstdc++/110054
            * include/experimental/bits/simd_builtin.h (_S_masked_store):
            Call into deduced ABI's SimdImpl after conversion.
            * include/experimental/bits/simd_x86.h (_S_masked_store_nocvt):
            Don't use _mm_maskmoveu_si128. Use the generic fall-back
            implementation. Also fix masked stores without SSE2, which
            were not doing anything before.

    (cherry picked from commit 27e45b7597d6fb1a71927d658a0294797b720c0a)=