1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 .ident "%Z%%M% %I% %E% SMI" 27 28 .file "%M%" 29 30#include "SYS.h" 31 32 /* 33 * NOTE: htonl/ntohl are identical routines, as are htons/ntohs. 34 * As such, they could be implemented as a single routine, using 35 * multiple ALTENTRY/SET_SIZE definitions. We don't do this so 36 * that they will have unique addresses, allowing DTrace and 37 * other debuggers to tell them apart. 38 */ 39 40 41/* 42 * unsigned long htonl( hl ) 43 * unsigned long ntohl( hl ) 44 * long hl; 45 * reverses the byte order of 'uint32_t hl' 46 */ 47 ENTRY(htonl) 48 movl %edi, %eax /* %eax = hl */ 49 bswap %eax /* reverses the byte order of %eax */ 50 ret /* return (%eax) */ 51 SET_SIZE(htonl) 52 53 ENTRY(ntohl) 54 movl %edi, %eax /* %eax = hl */ 55 bswap %eax /* reverses the byte order of %eax */ 56 ret /* return (%eax) */ 57 SET_SIZE(ntohl) 58 59/* 60 * unsigned short htons( hs ) 61 * short hs; 62 * 63 * reverses the byte order in hs. 64 */ 65 ENTRY(htons) 66 movl %edi, %eax /* %eax = hs */ 67 bswap %eax /* reverses the byte order of %eax */ 68 shrl $16, %eax /* moves high 16-bit to low 16-bit */ 69 ret /* return (%eax) */ 70 SET_SIZE(htons) 71 72 ENTRY(ntohs) 73 movl %edi, %eax /* %eax = hs */ 74 bswap %eax /* reverses the byte order of %eax */ 75 shrl $16, %eax /* moves high 16-bit to low 16-bit */ 76 ret /* return (%eax) */ 77 SET_SIZE(ntohs) 78