[PATCH][x86] Add permutex[var]_epi[32,64] intrinsics

[Peryt, Sebastian]

Hi,

This patch adds missing intrinsics:
        - _mm256_permutexvar_epi32
        - _mm256_permutex_epi64
        - _mm256_permutexvar_epi64

gcc/
        * config/i386/avx512vlintrin.h (_mm256_permutexvar_epi64, 
_mm256_permutexvar_epi32,
        _mm256_permutex_epi64): New intrinsics.
        
gcc/tesuite/
        * gcc.target/i386/avx512vl-vpermd-1.c (_mm256_permutexvar_epi32): Test 
new intrinsic.
        * gcc.target/i386/avx512vl-vpermq-imm-1.c (_mm256_permutex_epi64): 
Ditto.
        * gcc.target/i386/avx512vl-vpermq-var-1.c (_mm256_permutexvar_epi64): 
Ditto.
        *gcc.target/i386/avx512f-vpermd-2.c: Removed define length constraint.
        * gcc.target/i386/avx512f-vpermq-imm-2.c: Ditto.
        * gcc.target/i386/avx512f-vpermq-var-2.c: Ditto.

Is it ok for trunk?

Thanks,
Sebastian

permutex.patch
Description: permutex.patch