Enable VNNI support [5/5]

Enable VNNI support [5/5]

gcc/
	* config/i386/avx512vnniintrin.h (_mm512_dpwssds_epi32,
	_mm512_mask_dpwssds_epi32, _mm512_maskz_dpwssds_epi32): New intrinsics.
	* config/i386/avx512vnnivlintrin.h (_mm256_dpwssds_epi32,
	_mm256_mask_dpwssds_epi32, _mm256_maskz_dpwssds_epi32,
	_mm_dpwssds_epi32, _mm_mask_dpwssds_epi32,
	_mm_maskz_dpwssds_epi32): Ditto.

gcc/testsuite/
	* gcc.target/i386/avx512f-vnni-1.c: Add checks for vdpdwssds.
	* gcc.target/i386/avx512vl-vnni-1.c: Ditto.
	* gcc.target/i386/avx512f-vpdpwssds-2.c: New test.
	* gcc.target/i386/avx512vl-vpdpwssds-2.c: Ditto.

From-SVN: r255498