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Subject: [Bug target/101985] vec_cpsgn parameter order
Date: Tue, 12 Oct 2021 22:39:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101985

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by William Schmidt <wschmidt@gcc.gnu.org=
>:

https://gcc.gnu.org/g:76ba473b99c30ddec6171840a76292d6d4b67e7c

commit r12-4361-g76ba473b99c30ddec6171840a76292d6d4b67e7c
Author: Bill Schmidt <wschmidt@linux.ibm.com>
Date:   Tue Oct 12 17:37:16 2021 -0500

    rs6000: Fix vec_cpsgn parameter order (PR101985)

    The vec_cpsgn built-in function API differs in argument order from the
    copysign<mode>3 convention.  Currently that pattern is incorrctly used =
to
    implement vec_cpsgn.  Fix that by reversing the operand order of the
    builtin while leaving the existing pattern in place to implement copysi=
gnf
    for vector modes.

    Part of the fix when using the new built-in support requires an adjustm=
ent
    to a pending patch that replaces much of altivec.h with an automatically
    generated file.

    Also fix a bug in the new built-in overload infrastructure where we were
    using the VSX form of the VEC_COPYSIGN built-in when we should default =
to
    the VMX form.

    2021-10-12  Bill Schmidt  <wschmidt@linux.ibm.com>

    gcc/
            PR target/101985
            * config/rs6000/altivec.h (vec_cpsgn): Swap operand order.
            * config/rs6000/rs6000-overload.def (VEC_COPYSIGN): Use SKIP to
            avoid generating an automatic #define of vec_cpsgn.  Use the
            correct built-in for V4SFmode that doesn't depend on VSX.

    gcc/testsuite/
            PR target/101985
            * gcc.target/powerpc/pr101985-1.c: New.
            * gcc.target/powerpc/pr101985-2.c: New.=