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 */
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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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #ifndef _ASM_BYTEORDER_H
27 #define _ASM_BYTEORDER_H
28
29 #include <sys/types.h>
30
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34
35 #if !defined(__lint) && defined(__GNUC__)
36
37 /*
38 * htonll(), ntohll(), htonl(), ntohl(), htons(), ntohs()
39 * These functions reverse the byte order of the input parameter and returns
40 * the result. This is to convert the byte order from host byte order
41 * (little endian) to network byte order (big endian), or vice versa.
42 */
43
44
45 #if defined(__i386) || defined(__amd64)
46
47 extern __inline__ uint16_t htons(uint16_t value)
48 {
49 #if defined(__amd64)
50 __asm__("xchgb %h0, %b0" : "+Q" (value));
51 #elif defined(__i386)
52 __asm__("xchgb %h0, %b0" : "+q" (value));
53 #endif
54 return (value);
55 }
56
57 extern __inline__ uint16_t ntohs(uint16_t value)
58 {
59 #if defined(__amd64)
60 __asm__("xchgb %h0, %b0" : "+Q" (value));
61 #elif defined(__i386)
62 __asm__("xchgb %h0, %b0" : "+q" (value));
63 #endif
64 return (value);
65 }
66
67 extern __inline__ uint32_t htonl(uint32_t value)
68 {
69 __asm__("bswap %0" : "+r" (value));
70 return (value);
71 }
72
73 extern __inline__ uint32_t ntohl(uint32_t value)
74 {
75 __asm__("bswap %0" : "+r" (value));
76 return (value);
77 }
78
79 #if defined(__amd64)
80 extern __inline__ uint64_t htonll(uint64_t value)
81 {
82 __asm__("bswapq %0" : "+r" (value));
83 return (value);
84 }
85
86 extern __inline__ uint64_t ntohll(uint64_t value)
87 {
88 __asm__("bswapq %0" : "+r" (value));
89 return (value);
90 }
91
92 #elif defined(__i386)
93 /* Use the htonl() and ntohl() inline functions defined above */
94 extern __inline__ uint64_t htonll(uint64_t value)
95 {
96 return (htonl(value >> 32) | ((uint64_t)htonl(value) << 32));
97 }
98
99 extern __inline__ uint64_t ntohll(uint64_t value)
100 {
101 return (ntohl(value >> 32) | (uint64_t)ntohl(value) << 32);
102 }
103 #endif /* __amd64 */
104
105 #endif /* __i386 || __amd64 */
106
107 #endif /* !__lint && __GNUC__ */
108
109 #ifdef __cplusplus
110 }
111 #endif
112
113 #endif /* _ASM_BYTEORDER_H */
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