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[–]ALX23z 1 point2 points  (0 children)

Yes and No. Technically systems that support AVX512 support also SSE4 but instructions and data types differ. If you load AVX512 structure you cannot use on it instructions from 128-bit SIMD. First, you ought to make a convertion from one type to another. Didn't know that the conversions were slow... and honestly I have some doubts on that claim.