2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A/*
2N/A * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A .file "byteorder.s"
2N/A
2N/A#include "SYS.h"
2N/A
2N/A /*
2N/A * NOTE: htonl/ntohl are identical routines, as are htons/ntohs.
2N/A * As such, they could be implemented as a single routine, using
2N/A * multiple ALTENTRY/SET_SIZE definitions. We don't do this so
2N/A * that they will have unique addresses, allowing DTrace and
2N/A * other debuggers to tell them apart.
2N/A */
2N/A
2N/A/ unsigned long htonl( hl )
2N/A/ unsigned long ntohl( hl )
2N/A/ long hl;
2N/A/ reverses the byte order of 'long hl'
2N/A/
2N/A ENTRY(htonl)
2N/A movl 4(%esp), %eax / %eax = hl
2N/A bswap %eax / reverses the byte order of %eax
2N/A ret / return (%eax)
2N/A SET_SIZE(htonl)
2N/A
2N/A ENTRY(ntohl)
2N/A movl 4(%esp), %eax / %eax = hl
2N/A bswap %eax / reverses the byte order of %eax
2N/A ret / return (%eax)
2N/A SET_SIZE(ntohl)
2N/A
2N/A/ unsigned short htons( hs )
2N/A/ short hs;
2N/A/
2N/A/ reverses the byte order in hs.
2N/A/
2N/A ENTRY(htons)
2N/A movl 4(%esp), %eax / %eax = hs
2N/A bswap %eax / reverses the byte order of %eax
2N/A shrl $16, %eax / moves high 16-bit to low 16-bit
2N/A ret / return (%eax)
2N/A SET_SIZE(htons)
2N/A
2N/A ENTRY(ntohs)
2N/A movl 4(%esp), %eax / %eax = hs
2N/A bswap %eax / reverses the byte order of %eax
2N/A shrl $16, %eax / moves high 16-bit to low 16-bit
2N/A ret / return (%eax)
2N/A SET_SIZE(ntohs)