From 67ba40d1e05c39ffe71294476d2f2c13c481f3bd Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 23 Aug 2012 14:38:34 -0400 Subject: [PATCH] optimize legacy ffs function --- src/misc/ffs.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/misc/ffs.c b/src/misc/ffs.c index 2f7cb321..673ce5a9 100644 --- a/src/misc/ffs.c +++ b/src/misc/ffs.c @@ -1,9 +1,7 @@ #include +#include "atomic.h" int ffs(int i) { - unsigned int j = i; - for (i=1; j && !(j&1); j>>=1, i++); - if (j) return i; - return 0; + return i ? a_ctz_l(i)+1 : 0; } -- 2.20.1