HAKMEM

Hacker's Delight builds upon HAKMEM, cataloguing all kinds of bit-twiddling tricks. It's not the kind of book you'll use every day*, but it's a great reference for your bookshelf.<p><a href="http://www.hackersdelight.org/" rel="nofollow">http://www.hackersdelight.org/</a><p>If you do use it every day, I'd love to know where you work.

Alan Mycroft has given some C interpretations of HAKMEM examples at <a href="http://www.cl.cam.ac.uk/~am21/hakmemc.html" rel="nofollow">http://www.cl.cam.ac.uk/~am21/hakmemc.html</a>.

This piece is quite charming: "If arithmetic overflow is a fatal error, some fascist pig with a read-only mind is trying to enforce machine independence." (Item 154)

Some of these are pretty hardcore...