3 ms·

Good point. It makes me wonder if modern out-of-order processors can skip performing unused computations altogether, if their result registers are overwritten b

by unnah 2y ago

Good point. It makes me wonder if modern out-of-order processors can skip performing unused computations altogether, if their result registers are overwritten by other data later (in program order).

ants_a 2y ago
No, and it feels unlikely that they will either.
gpderetta 2y ago
CPUs could in theory speculate CMOV, reintroducing prediction when predictable. But after Spectre, IIRC Intel now guarantees that CMOV is never speculated.