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Commit faff990e authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] Fix Icelake VPMULLQ zmm pipes and adjust AVX512DQ v8i64 mul costs to match worse case 

Icelake PMULLQ throughput regressed cf SkylakeServer as its Pipe0 only

Confirmed with Intel SOM, Agner and instlatx64
parent ddb6c2b3
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