ffs
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## 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.

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