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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 #ifndef _ASM_BYTEORDER_H
  28 #define _ASM_BYTEORDER_H
  29 
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31 
  32 #include <sys/types.h>
  33 
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37 
  38 #if !defined(__lint) && defined(__GNUC__)
  39 
  40 #if defined(__i386) || defined(__amd64)
  41 
  42 extern __inline__ uint32_t htonl(uint32_t value)
  43 {
  44         __asm__("bswap %0" : "+r" (value));
  45         return (value);
  46 }
  47 
  48 extern __inline__ uint32_t ntohl(uint32_t value)
  49 {
  50         __asm__("bswap %0" : "+r" (value));
  51         return (value);
  52 }
  53 
  54 extern __inline__ uint16_t htons(uint16_t value)
  55 {
  56 #if defined(__amd64)
  57         __asm__("xchgb %h0, %b0" : "+Q" (value));
  58 #elif defined(__i386)
  59         __asm__("xchgb %h0, %b0" : "+q" (value));
  60 #endif
  61         return (value);
  62 }
  63 
  64 extern __inline__ uint16_t ntohs(uint16_t value)
  65 {
  66 #if defined(__amd64)
  67         __asm__("xchgb %h0, %b0" : "+Q" (value));
  68 #elif defined(__i386)
  69         __asm__("xchgb %h0, %b0" : "+q" (value));
  70 #endif
  71         return (value);
  72 }
  73 
  74 #endif  /* __i386 || __amd64 */
  75 
  76 #endif  /* !__lint && __GNUC__ */
  77 
  78 #ifdef  __cplusplus
  79 }
  80 #endif
  81 
  82 #endif  /* _ASM_BYTEORDER_H */