xref: /illumos-gate/usr/src/uts/intel/asm/byteorder.h (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #ifndef _ASM_BYTEORDER_H
28*7c478bd9Sstevel@tonic-gate #define	_ASM_BYTEORDER_H
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
31*7c478bd9Sstevel@tonic-gate 
32*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
33*7c478bd9Sstevel@tonic-gate 
34*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
35*7c478bd9Sstevel@tonic-gate extern "C" {
36*7c478bd9Sstevel@tonic-gate #endif
37*7c478bd9Sstevel@tonic-gate 
38*7c478bd9Sstevel@tonic-gate #if !defined(__lint) && defined(__GNUC__)
39*7c478bd9Sstevel@tonic-gate 
40*7c478bd9Sstevel@tonic-gate #if defined(__i386) || defined(__amd64)
41*7c478bd9Sstevel@tonic-gate 
42*7c478bd9Sstevel@tonic-gate extern __inline__ uint32_t htonl(uint32_t value)
43*7c478bd9Sstevel@tonic-gate {
44*7c478bd9Sstevel@tonic-gate 	__asm__("bswap %0" : "+r" (value));
45*7c478bd9Sstevel@tonic-gate 	return (value);
46*7c478bd9Sstevel@tonic-gate }
47*7c478bd9Sstevel@tonic-gate 
48*7c478bd9Sstevel@tonic-gate extern __inline__ uint32_t ntohl(uint32_t value)
49*7c478bd9Sstevel@tonic-gate {
50*7c478bd9Sstevel@tonic-gate 	__asm__("bswap %0" : "+r" (value));
51*7c478bd9Sstevel@tonic-gate 	return (value);
52*7c478bd9Sstevel@tonic-gate }
53*7c478bd9Sstevel@tonic-gate 
54*7c478bd9Sstevel@tonic-gate extern __inline__ uint16_t htons(uint16_t value)
55*7c478bd9Sstevel@tonic-gate {
56*7c478bd9Sstevel@tonic-gate #if defined(__amd64)
57*7c478bd9Sstevel@tonic-gate 	__asm__("xchgb %h0, %b0" : "+Q" (value));
58*7c478bd9Sstevel@tonic-gate #elif defined(__i386)
59*7c478bd9Sstevel@tonic-gate 	__asm__("xchgb %h0, %b0" : "+q" (value));
60*7c478bd9Sstevel@tonic-gate #endif
61*7c478bd9Sstevel@tonic-gate 	return (value);
62*7c478bd9Sstevel@tonic-gate }
63*7c478bd9Sstevel@tonic-gate 
64*7c478bd9Sstevel@tonic-gate extern __inline__ uint16_t ntohs(uint16_t value)
65*7c478bd9Sstevel@tonic-gate {
66*7c478bd9Sstevel@tonic-gate #if defined(__amd64)
67*7c478bd9Sstevel@tonic-gate 	__asm__("xchgb %h0, %b0" : "+Q" (value));
68*7c478bd9Sstevel@tonic-gate #elif defined(__i386)
69*7c478bd9Sstevel@tonic-gate 	__asm__("xchgb %h0, %b0" : "+q" (value));
70*7c478bd9Sstevel@tonic-gate #endif
71*7c478bd9Sstevel@tonic-gate 	return (value);
72*7c478bd9Sstevel@tonic-gate }
73*7c478bd9Sstevel@tonic-gate 
74*7c478bd9Sstevel@tonic-gate #endif	/* __i386 || __amd64 */
75*7c478bd9Sstevel@tonic-gate 
76*7c478bd9Sstevel@tonic-gate #endif	/* !__lint && __GNUC__ */
77*7c478bd9Sstevel@tonic-gate 
78*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
79*7c478bd9Sstevel@tonic-gate }
80*7c478bd9Sstevel@tonic-gate #endif
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate #endif	/* _ASM_BYTEORDER_H */
83