It's 3 cycles for float multiplication (and 1 for shift right): https://uops.inf...

account42 · 2026-06-02T10:51:33 1780397493

Shift right isn't even relevant here - if you shift before conversion to float all your values end up 0 and if you want to divide afterwards its no longer a simple shift.

exyi · 2026-06-02T14:22:33 1780410153

Exactly. Although if you do >> 8 while working with uint8, it will be the fastest :)

userbinator · 2026-06-02T03:27:45 1780370865

It's 3 cycles for float multiplication (and 1 for shift right):

3x faster

In throughput it's even less of a difference: 2 per cycle vs 3 per cycle.

50% faster