NAME
ffs − find first set bit in word
SYNOPSIS
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int ffs(int x); |
ARGUMENTS
int 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.