1FFS(9)                     Basic C Library Functions                    FFS(9)
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NAME

6       ffs - find first set bit in word
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SYNOPSIS

9       int ffs(int x);
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ARGUMENTS

12       x
13           the word to search
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DESCRIPTION

16       This is defined the same way as the libc and compiler builtin ffs
17       routines, therefore differs in spirit from the other bitops.
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19       ffs(value) returns 0 if value is 0 or the position of the first set bit
20       if value is nonzero. The first (least significant) bit is at position
21       1.
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24Kernel Hackers Manual 3.10         June 2019                            FFS(9)
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