AVX-512. 62/n. Add vpmaddubsw,vdbpsadbw insn patterns.

AVX-512. 62/n. Add vpmaddubsw,vdbpsadbw insn patterns.

gcc/
	* config/i386/sse.md
	(define_c_enum "unspec"): Add UNSPEC_DBPSADBW, UNSPEC_PMADDUBSW512.
	(define_insn "avx512bw_pmaddubsw512<mode><mask_name>"): New.
	(define_insn "<mask_codefor>avx512bw_dbpsadbw<mode><mask_name>"):
	Ditto.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
From-SVN: r216180