[patch][i386, AVX] GFNI enabling [4/4]

[Koval, Julia]

Hi,
This the fourth patch of GFNI ISASET enabling. It enables GF2P8MULB 
instruction, described here: 
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf

gcc/
        * config/i386/gfniintrin.h (_mm_gf2p8mul_epi8, _mm256_gf2p8mul_epi8,
        _mm_mask_gf2p8mul_epi8, _mm_maskz_gf2p8mul_epi8, 
_mm256_mask_gf2p8mul_epi8,
        _mm256_maskz_gf2p8mul_epi8, _mm512_mask_gf2p8mul_epi8, 
_mm512_maskz_gf2p8mul_epi8,
        _mm512_gf2p8mul_epi8): New intrinsics.
        * config/i386/i386-builtin-types.def (V64QI_FTYPE_V64QI_V64QI): New 
type.
        * config/i386/i386-builtin.def (__builtin_ia32_vgf2p8mulb_v64qi, 
__builtin_ia32_vgf2p8mulb_v64qi_mask
        __builtin_ia32_vgf2p8mulb_v32qi, __builtin_ia32_vgf2p8mulb_v32qi_mask,
        __builtin_ia32_vgf2p8mulb_v16qi, __builtin_ia32_vgf2p8mulb_v16qi_mask): 
New builtins.
        * config/i386/sse.md (vgf2p8mulb_*): New pattern.
        * config/i386/i386.c (ix86_expand_args_builtin): Handle new type.

gcc/testsuite/
        * gcc.target/i386/avx512f-gf2p8mulb-2.c: New runtime tests.
        * gcc.target/i386/avx512vl-gf2p8mulb-2.c: Ditto.
        * gcc.target/i386/gfni-1.c: Add tests for GF2P8MUL.
        * gcc.target/i386/gfni-2.c: Ditto. 
        * gcc.target/i386/gfni-3.c: Ditto. 
        * gcc.target/i386/gfni-4.c: Ditto.

Ok for trunk?

Thanks,
Julia

0004-GF2P8MULB-instruction.patch
Description: 0004-GF2P8MULB-instruction.patch