Simon Pilgrim 156f83adc2 [X86] combineVectorTruncation - use PACKUSDW(BLENDW(X,0),BLENDW(Y,0)) for v8i32->v8i16 truncation ...

Limit this to SSE41 - AVX1 targets to avoid UNPCKL(PSHUFB,PSHUFB), pre-SSE41 we don't have PACKUSDW/BLENDW and with AVX2 we can perform this as PERMQ(PSHUFB()).

2022-01-30 20:07:04 +00:00

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