[Bug target/102811] vcvtph2ps and vcvtps2ph should be used to convert _Float16 to SFmode with -mf16c

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>:

https://gcc.gnu.org/g:90cb088ece8d8cc1019d25629d1585e5b0234179

commit r12-5536-g90cb088ece8d8cc1019d25629d1585e5b0234179
Author: konglin1 <lingling.k...@intel.com>
Date:   Wed Nov 10 09:37:32 2021 +0800

    i386: vcvtph2ps and vcvtps2ph should be used to convert _Float16 to SFmode
with -mf16c [PR 102811]

    Add define_insn extendhfsf2 and truncsfhf2 for target_f16c.

    gcc/ChangeLog:

            PR target/102811
            * config/i386/i386.c (ix86_can_change_mode_class): Allow 16 bit
data in XMM register
            for TARGET_SSE2.
            * config/i386/i386.md (extendhfsf2): Add extenndhfsf2 for
TARGET_F16C.
            (extendhfdf2): Restrict extendhfdf for TARGET_AVX512FP16 only.
            (*extendhf<mode>2): Rename from extendhf<mode>2.
            (truncsfhf2): Likewise.
            (truncdfhf2): Likewise.
            (*trunc<mode>2): Likewise.

    gcc/testsuite/ChangeLog:

            PR target/102811
            * gcc.target/i386/pr90773-21.c: Allow pextrw instead of movw.
            * gcc.target/i386/pr90773-23.c: Ditto.
            * gcc.target/i386/avx512vl-vcvtps2ph-pr102811.c: New test.