July 2002
Intermediate to advanced
320 pages
8h 15m
English
Content preview from Hacker's Delight
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8-4. Multiplication by Constants
It is nearly a triviality that one can multiply by a constant with a sequence of shift left and add instructions. For example, to multiply x by 13 (binary 1101), one can code
where r gets the result.
In this section, left shifts are denoted by multiplication by a power of 2, so the above plan is written r ← 8x + 4x + x, which is intended to show four instructions on the basic RISC and most machines.
What we want to convey here is that there is more to this subject than meets the eye. First of all, there are other considerations besides simply the number of shift’s and add’s required to do a multiplication by ...
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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.