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Bit-permuting 16 u32s at once with AVX-512

http://bitmath.blogspot.com/2024/12/bit-permuting-16-u32s-at-once-with-avx.html

by dist1ll • 2 years ago

51 4 2 years ago

BI

bitmath.blogspot.com

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4

metadat• 2 years ago

What's the purpose of the excessive quantity of leading underscores on every variable? Are they intended to communicate something special?

mcyc• 2 years ago

It's just a convention for SIMD functions and types.

AnonGuy535• 2 years ago

None of the variables there have leading underscores in the name. If you mean the type __m512i, possibly to avoid conflicting with user-defined types in C, which has no namespacing to avoid such conflicts and sort of "softly reserves" names starting with underscores for non-user-defined names.

flohofwoe• 2 years ago

Double underscores are reserved by the C standard (https://devblogs.microsoft.com/oldnewthing/20230109-00/?p=10...), so it's a measure to avoid collisions with user-defined types.

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