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Re:Low Level Bit Hacks You Absolutely Must Know by old-gregg on Tuesday June 30, 2009 @02:54PM (#681322)
For those who enjoy these kind of problems I highly recommend "Hacker's delight".

http://www.amazon.com/Hackers-Delight-Henry-S-Warren/dp/0201...

Re:Low Level Bit Hacks You Absolutely Must Know by pkrumins on Tuesday June 30, 2009 @02:57PM (#681328)
Seconded. That is an amazing book.

I also recommend this much more complete article on bit hacks:

http://graphics.stanford.edu/~seander/bithacks.html