f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
72 lines
2.3 KiB
Groff
72 lines
2.3 KiB
Groff
.\" $NetBSD: popcount.3,v 1.5 2011/08/22 01:36:04 dholland Exp $
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.\"
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.\" Copyright (c) 2009 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Joerg Sonnenberger.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 22, 2011
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.Dt POPCOUNT 3
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.Os
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.Sh NAME
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.Nm popcount ,
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.Nm popcountl ,
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.Nm popcountll ,
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.Nm popcount32 ,
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.Nm popcount64
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.Nd count number of bits set in a bit string
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In strings.h
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.Ft unsigned int
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.Fn popcount "unsigned int value"
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.Ft unsigned int
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.Fn popcountl "unsigned long value"
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.Ft unsigned int
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.Fn popcountll "unsigned long long value"
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.In stdint.h
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.Ft unsigned int
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.Fn popcount32 "uint32_t value"
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.Ft unsigned int
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.Fn popcount64 "uint64_t value"
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.Sh DESCRIPTION
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The
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.Nm
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functions returns the number of bits set in
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.Fa value .
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.Sh SEE ALSO
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.Xr ffs 3
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.Sh HISTORY
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The
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.Fn popcount ,
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.Fn popcountl ,
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.Fn popcountll ,
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.Fn popcount32 ,
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and
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.Fn popcount64
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functions appeared in
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.Nx 6.0 .
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