Re:The NSA Instruction (2019)
by rcgorton on Friday June 11, 2021 @09:05AM
(#27472768)
It is also incredibly useful for doing string scanning - look at strlen/strchr in various libc imp lementations
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Re:The NSA Instruction (2019)
by chrchang523 on Friday June 11, 2021 @10:43AM
(#27474054)
Nitpick: it's the related "count trailing zeros" operation that is useful (in combination with movemask) there, not popcount itself.