Faster addition and subtraction on modern CPUs Do you remember how to do long addition on paper? ¹¹ ¹ 6876 + 3406 ------ 10282 Starting from the “ones” position, we add 6 + 6 = 12, write down a 2 and carry a 1. We proceed to the left, one position at a time, until there are no more digits to add. When implementing addition for large integers (e.g. 264 and above), it’s common to write code that looks quite similar to this algorithm. Interestingly, there’s a straightforward trick that can speed up...