3 ms·
> If you would like to experiment yourself, Compiler Explorer snippet can be found here https://gcc.godbolt.org/z/qGzWo39b6 https://gcc.godbolt.org/z/qGzWo39b6
by mrcode007 2y ago
> If you would like to experiment yourself, Compiler Explorer snippet can be found here
https://gcc.godbolt.org/z/qGzWo39b6 https://gcc.godbolt.org/z/qGzWo39b6
Which is an x86-64 sample
- upon_drumhead 2y agoIt's a little impossible to show the difference between using popcnt and the expanded emulation code on a platform that doesn't support popcnt. It doesn't change the fact that the actual program itself was being complied on a platform that doesn't support popcnt, so no amount of compiler arguments would fix that.
- mrcode007 2y agoNEON extension on ARM comes with CNT instruction that counts set bits.