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Subject: [Bug target/97142] __builtin_fmod not optimized on POWER
Date: Tue, 07 Sep 2021 01:29:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97142

--- Comment #16 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Xiong Hu Luo <luoxhu@gcc.gnu.org>:

https://gcc.gnu.org/g:546ecb0054af302acf0839c7f3eb78598f8c0672

commit r12-3375-g546ecb0054af302acf0839c7f3eb78598f8c0672
Author: Xionghu Luo <luoxhu@linux.ibm.com>
Date:   Mon Sep 6 20:22:50 2021 -0500

    rs6000: Expand fmod and remainder when built with fast-math [PR97142]

    fmod/fmodf and remainder/remainderf could be expanded instead of library
    call when fast-math build, which is much faster.

    fmodf:
         fdivs   f0,f1,f2
         friz    f0,f0
         fnmsubs f1,f2,f0,f1

    remainderf:
         fdivs   f0,f1,f2
         frin    f0,f0
         fnmsubs f1,f2,f0,f1

    SPEC2017 Ofast P8LE: 511.povray_r +1.14%,  526.blender_r +1.72%

    gcc/ChangeLog:

    2021-09-07  Xionghu Luo  <luoxhu@linux.ibm.com>

            PR target/97142
            * config/rs6000/rs6000.md (fmod<mode>3): New define_expand.
            (remainder<mode>3): Likewise.

    gcc/testsuite/ChangeLog:

    2021-09-07  Xionghu Luo  <luoxhu@linux.ibm.com>

            PR target/97142
            * gcc.target/powerpc/pr97142.c: New test.=