3 ms·
indeed. riscv for instance. also, afaik, xor’ing is faster. i would assume that someone like mr. raymond would know…
by signa11 6mo ago
indeed. riscv for instance. also, afaik, xor’ing is faster. i would assume that someone like mr. raymond would know…
- pif 6mo agoWhich part of "mathematical operations don’t reset the NaT bit" did you not understand?
- IshKebab 6mo ago> afaik, xor’ing is faster Even tiny tiny CPUs can do sub in one cycle, so I doubt that. On super-scalar CPUs xor and sub are normally issued to the same execution units so it wouldn't make a difference there either.
- tliltocatl 6mo agoOn superscalars running xor trick as is would be significantly slower because it implies a data dependency where there isn't one. But all OOO x86's optimize it away internally.
- IshKebab 6mo agoSub has the same false data dependency.