July 2002
Intermediate to advanced
320 pages
8h 15m
English
Content preview from Hacker's Delight
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3-1. Rounding Up/Down to a Multiple of a Known Power of 2
Rounding an unsigned integer x down to, for example, the next smaller multiple of 8, is trivial: x & −8 does it. An alternative is
These work for signed integers as well, provided “round down” means to round in the negative direction (e.g., (−37) & (−8) = −40).
Rounding up is almost as easy. For example, an unsigned integer x can be rounded up to the next greater multiple of 8 with either of
These expressions are correct for signed integers as well, provided “round up” means to round in ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.