63 lines
2.1 KiB
Groff
63 lines
2.1 KiB
Groff
.\" $NetBSD: bitops.3,v 1.3 2011/04/08 08:46:12 jruoho Exp $
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.\"
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.\" Copyright (c) 2011 Jukka Ruohonen <jruohonen@iki.fi>
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.\" All rights reserved.
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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 April 8, 2011
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.Dt BITOPS 3
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.Os
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.Sh NAME
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.Nm bitops
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.Nd functions related to bits and integers
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.Sh SYNOPSIS
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.In sys/bitops.h
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.Sh DESCRIPTION
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The
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.In sys/bitops.h
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header includes some
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.Em static inline
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functions related bits and integers.
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Among these are:
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.Bl -tag -width "fast_divide32(3) " -offset indent
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.It Xr ffs32 3
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functions to find the first and last bit in integers of type
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.Vt uint32_t
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and
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.Vt uint64_t
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.It Xr ilog2 3
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a macro for binary logarithm
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.It Xr fast_divide32 3
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a function for fast 32-bit division
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.El
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.Sh SEE ALSO
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.Xr bits 3 ,
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.Xr bitstring 3 ,
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.Xr cdefs 3 ,
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.Xr param 3
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.Sh HISTORY
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The
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.In sys/bitops.h
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header first appeared in
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.Nx 4.0 .
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