Pages tagged bit:

Low Level Bit Hacks You Absolutely Must Know - good coders code, great reuse
http://www.catonmat.net/blog/low-level-bit-hacks-you-absolutely-must-know/

good coders code, great reuse
2009-07-04 - 当面C#と.NETな記録
http://d.hatena.ne.jp/siokoshou/20090704#p1
一番右端の立っているビット位置を求める「ものすごい」コード
うーん全然わかんねー…
crazy!
Puzzle: Fast Bit Counting « Reflections
http://gurmeetsingh.wordpress.com/2008/08/05/fast-bit-counting-routines/
return ((tmp + (tmp >> 3)) & 030707070707) % 63;
bithacks.h - bit hacks header file - good coders code, great reuse
http://www.catonmat.net/blog/bit-hacks-header-file/
This header file is called “bithacks.h” and it contains various macros for bit manipulations. I also wrote tests for all the macros in the “bithacks-test.c” program. The most beautiful part of “bithacks.h” is the “B8” macro that allows to write something like ” x = B8(10101010) ” and turns it into ” x = 170 ” (because 10101010 in binary is 170 in decimal). I have not yet added B16 and B32 macros but I will add them when I publish the article on advanced bithacks. The credit for the B8 idea goes to Tom Torfs who was the first to write it.
the bit twiddler
http://bits.stephan-brumme.com/
一些有用的代码收集
Frammenti di codice C per trucchetti
the bit twiddler