I’ve played around with div, rem and mod for signed bit integers. I first noticed that these functions are faster for Int32 than for Int64 on amd64 processors. (This becomes clear if you look at the processor instruction set.) Then I tried smaller integers. On several processors (all amd64), the fol…

Faster `div`, `rem` and `mod` for small integers?

matthias314 June 27, 2025, 1:55am 5

Sorry, I was wrong – srem is translated to idiv on amd64, which does not allow the combination of typemin and -1.

Topic		Replies	Views
What is faster? Modular Arithmetic functions and operations Performance question	20	2399	December 4, 2020
Why is fld(a, b) so much slower than floor(a / b)? General Usage	11	1275	November 11, 2019
Optimizing remainder with constant modulus implementation Performance	2	540	April 6, 2021
Playing around with IntMod General Usage	13	1799	January 3, 2017
Does mod() work? Or am I high? General Usage	25	1630	September 19, 2018