ffs man page on Oracle

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FFS(9)			   Basic C Library Functions			FFS(9)

NAME
       ffs - find first set bit in word

SYNOPSIS
       int ffs(int x);

ARGUMENTS
       x
	   the word to search

DESCRIPTION
       This is defined the same way as the libc and compiler builtin ffs
       routines, therefore differs in spirit from the other bitops.

       ffs(value) returns 0 if value is 0 or the position of the first set bit
       if value is nonzero. The first (least significant) bit is at position
       1.

COPYRIGHT
Kernel Hackers Manual 3.8.	   June 2014				FFS(9)
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