osfmk/i386/ntoh.s

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * HISTORY
  30  *
  31  * Revision 1.1.1.1  1998/09/22 21:05:37  wsanchez
  32  * Import of Mac OS X kernel (~semeria)
  33  *
  34  * Revision 1.1.1.1  1998/03/07 02:25:38  wsanchez
  35  * Import of OSF Mach kernel (~mburg)
  36  *
  37  * Revision 1.1.6.1  1994/09/23  01:59:41  ezf
  38  *      change marker to not FREE
  39  *      [1994/09/22  21:25:28  ezf]
  40  *
  41  * Revision 1.1.2.2  1993/06/02  23:26:45  jeffc
  42  *      Added to OSF/1 R1.3 from NMK15.0.
  43  *      [1993/06/02  21:06:38  jeffc]
  44  *
  45  * Revision 1.1  1992/09/30  02:43:08  robert
  46  *      Initial revision
  47  *
  48  * $EndLog$
  49  */
  50 /* CMU_HIST */
  51 /*
  52  * Revision 2.4  91/05/14  16:12:50  mrt
  53  *      Correcting copyright
  54  *
  55  * Revision 2.3  91/02/14  15:04:55  mrt
  56  *      Changed to new Mach copyright
  57  *
  58  *
  59  * Revision 2.2  90/05/03  15:34:56  dbg
  60  *      First checkin.
  61  *
  62  *      New a.out and coff compatible .s files.
  63  *      [89/10/16            rvb]
  64  *
  65  * Revision 1.3  89/02/26  12:35:37  gm0w
  66  *      Changes for cleanup.
  67  *
  68  * 16-Feb-89  Robert Baron (rvb) at Carnegie-Mellon University
  69  *      Created.
  70  *
  71  */
  72 /* CMU_ENDHIST */
  73 /*
  74  * Mach Operating System
  75  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  76  * All Rights Reserved.
  77  *
  78  * Permission to use, copy, modify and distribute this software and its
  79  * documentation is hereby granted, provided that both the copyright
  80  * notice and this permission notice appear in all copies of the
  81  * software, derivative works or modified versions, and any portions
  82  * thereof, and that both notices appear in supporting documentation.
  83  *
  84  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  85  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  86  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  87  *
  88  * Carnegie Mellon requests users of this software to return to
  89  *
  90  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  91  *  School of Computer Science
  92  *  Carnegie Mellon University
  93  *  Pittsburgh PA 15213-3890
  94  *
  95  * any improvements or extensions that they make and grant Carnegie Mellon
  96  * the rights to redistribute these changes.
  97  */
  98 /*
  99  */
 100
 101 #include <i386/asm.h>
 102
 103 Entry(ntohl)
 104 ENTRY(htonl)
 105         movl    4(%esp), %eax
 106         rorw    $8, %ax
 107         ror     $16,%eax
 108         rorw    $8, %ax
 109         ret
 110
 111
 112 Entry(ntohs)
 113 ENTRY(htons)
 114         movzwl  4(%esp), %eax
 115         rorw    $8, %ax
 116         ret