AVX-512. 69/n. Add vpmulhrsw insn support.

AVX-512. 69/n. Add vpmulhrsw insn support.

gcc/
        * config/i386/sse.md
        (define_insn "avx512bw_umulhrswv32hi3<mask_name>"): New.
        (define_expand "<ssse3_avx2>_pmulhrsw<mode>3_mask"): 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: r216186