[Bug target/89021] Implement mmintrin.h in SSE

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89021

--- Comment #37 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed May 15 15:26:19 2019
New Revision: 271245

URL: https://gcc.gnu.org/viewcvs?rev=271245&root=gcc&view=rev
Log:
i386: Emulate MMX pshufb with SSE version

Emulate MMX version of pshufb with SSE version by masking out the bit 3
of the shuffle control byte.  Only SSE register source operand is allowed.

        PR target/89021
        * config/i386/sse.md (ssse3_pshufbv8qi3): Changed to
        define_insn_and_split.  Also allow TARGET_MMX_WITH_SSE.  Add
        SSE emulation.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/sse.md