1 | /* $NetBSD: byte_swap.h,v 1.7 2010/01/14 02:06:04 joerg Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 2010 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Charles M. Hannum. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copy of the i386 version. 64 bit versions may be added later. |
34 | */ |
35 | |
36 | #ifndef _AMD64_BYTE_SWAP_H_ |
37 | #define _AMD64_BYTE_SWAP_H_ |
38 | |
39 | #ifdef __x86_64__ |
40 | |
41 | #ifdef __GNUC__ |
42 | #include <sys/types.h> |
43 | __BEGIN_DECLS |
44 | |
45 | #define __BYTE_SWAP_U64_VARIABLE __byte_swap_u64_variable |
46 | static __inline uint64_t __byte_swap_u64_variable(uint64_t); |
47 | static __inline uint64_t |
48 | __byte_swap_u64_variable(uint64_t x) |
49 | { |
50 | __asm volatile ( "bswap %1" : "=r" (x) : "0" (x)); |
51 | return (x); |
52 | } |
53 | |
54 | #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable |
55 | static __inline uint32_t __byte_swap_u32_variable(uint32_t); |
56 | static __inline uint32_t |
57 | __byte_swap_u32_variable(uint32_t x) |
58 | { |
59 | __asm volatile ( "bswap %1" : "=r" (x) : "0" (x)); |
60 | return (x); |
61 | } |
62 | |
63 | #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable |
64 | static __inline uint16_t __byte_swap_u16_variable(uint16_t); |
65 | static __inline uint16_t |
66 | __byte_swap_u16_variable(uint16_t x) |
67 | { |
68 | __asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x)); |
69 | return (x); |
70 | } |
71 | |
72 | __END_DECLS |
73 | #endif |
74 | |
75 | #else /* __x86_64__ */ |
76 | |
77 | #include <i386/byte_swap.h> |
78 | |
79 | #endif /* __x86_64__ */ |
80 | |
81 | #endif /* !_AMD64_BYTE_SWAP_H_ */ |
82 | |