Bit Hack - Round off to multiple of 8

Question

can anyone please explain how this works (asz + 7) & ~7; It rounds off asz to the next higher multiple of 8.

It is easy to see that ~7 produces 11111000 (8bit repre

Answer 1

The +7 isn't to produce an exact multiple of 8, it's to make sure you get the next highest multiple of eight.

edit: Beaten by 16 seconds and several orders of quality. Oh well, back to lurking.