\"      $NetBSD: popcount.3,v 1.6 2016/07/14 18:21:31 abhinav Exp $
\"
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\" This code is derived from software contributed to The NetBSD Foundation
\" by Joerg Sonnenberger.
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Dd August 22, 2011
Dt POPCOUNT 3
Os
Sh NAME
Nm popcount ,
Nm popcountl ,
Nm popcountll ,
Nm popcount32 ,
Nm popcount64
Nd count number of bits set in a bit string
Sh LIBRARY
Lb libc
Sh SYNOPSIS
In strings.h
Ft unsigned int
Fn popcount "unsigned int value"
Ft unsigned int
Fn popcountl "unsigned long value"
Ft unsigned int
Fn popcountll "unsigned long long value"
In stdint.h
Ft unsigned int
Fn popcount32 "uint32_t value"
Ft unsigned int
Fn popcount64 "uint64_t value"
Sh DESCRIPTION
The
Nm
functions return the number of bits set in
Fa value .
Sh SEE ALSO
Xr ffs 3
Sh HISTORY
The
Fn popcount ,
Fn popcountl ,
Fn popcountll ,
Fn popcount32 ,
and
Fn popcount64
functions appeared in
Nx 6.0 .

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