usr/src/lib/libc/i386/gen/byteorder.s
author ab196087
Tue, 22 May 2007 11:10:09 -0700
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6518331 Eliminate duplicate addresses from ON ELF symbol sort sections
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/*
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 * CDDL HEADER START
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 *
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 * The contents of this file are subject to the terms of the
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 * Common Development and Distribution License (the "License").
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 * You may not use this file except in compliance with the License.
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 *
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 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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 * or http://www.opensolaris.org/os/licensing.
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 * See the License for the specific language governing permissions
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 * and limitations under the License.
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 *
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 * When distributing Covered Code, include this CDDL HEADER in each
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 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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 * If applicable, add the following below this CDDL HEADER, with the
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 * fields enclosed by brackets "[]" replaced with your own identifying
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 * information: Portions Copyright [yyyy] [name of copyright owner]
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 *
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 * CDDL HEADER END
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 */
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/*
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 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
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 * Use is subject to license terms.
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 */
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	.ident	"%Z%%M%	%I%	%E% SMI"
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	.file	"%M%"
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#include "SYS.h"
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	/*
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	 * NOTE: htonl/ntohl are identical routines, as are htons/ntohs.
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	 * As such, they could be implemented as a single routine, using
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	 * multiple ALTENTRY/SET_SIZE definitions. We don't do this so
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	 * that they will have unique addresses, allowing DTrace and
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	 * other debuggers to tell them apart. 
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	 */
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/	unsigned long htonl( hl )
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/	unsigned long ntohl( hl )
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/	long hl;
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/	reverses the byte order of 'long hl'
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/
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	ENTRY(htonl)
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	movl	4(%esp), %eax	/ %eax = hl
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	bswap	%eax		/ reverses the byte order of %eax
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	ret			/ return (%eax)
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	SET_SIZE(htonl)
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	ENTRY(ntohl)
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	movl	4(%esp), %eax	/ %eax = hl
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	bswap	%eax		/ reverses the byte order of %eax
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	ret			/ return (%eax)
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	SET_SIZE(ntohl)
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/	unsigned short htons( hs )
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/	short hs;
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/
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/	reverses the byte order in hs.
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/
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	ENTRY(htons)
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	movl	4(%esp), %eax	/ %eax = hs
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	bswap	%eax		/ reverses the byte order of %eax
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	shrl	$16, %eax	/ moves high 16-bit to low 16-bit
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	ret			/ return (%eax)
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	SET_SIZE(htons)
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	ENTRY(ntohs)
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	movl	4(%esp), %eax	/ %eax = hs
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	bswap	%eax		/ reverses the byte order of %eax
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	shrl	$16, %eax	/ moves high 16-bit to low 16-bit
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	ret			/ return (%eax)
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	SET_SIZE(ntohs)