> Unfortunately my machine (i7-7700) can't run anything beyond AVX2. You machine... | Hacker News

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		Const-me on Oct 14, 2021 \| parent \| context \| favorite \| on: A Tale of Two Optimisations > Unfortunately my machine (i7-7700) can't run anything beyond AVX2. You machine has BMI2. It's not SIMD, but it handles 8 bytes at a time, and very suitable for packing and unpacking these bits in this case. https://godbolt.org/z/xcT3exenr

lifthrasiir on Oct 14, 2021 [–]

Ugh, you were correct. I did copy and paste your code to my testing framework and it instantly crashed at that time, but it seems that I put a wrong offset to the output. The resulting code was slightly faster (by 2--4%) than my AVX2 code.

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