add word-sized ctz function to atomic.h
authorRich Felker <dalias@aerifal.cx>
Wed, 27 Apr 2011 16:19:49 +0000 (12:19 -0400)
committerRich Felker <dalias@aerifal.cx>
Wed, 27 Apr 2011 16:19:49 +0000 (12:19 -0400)
strictly speaking this and a few other ops should be factored into
asm.h or the file should just be renamed to asm.h, but whatever. clean
it up someday.


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