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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| - | 29 | /** @addtogroup libcamd64 amd64 |
|
| - | 30 | * @ingroup lc |
|
| - | 31 | * @brief amd64 architecture dependent parts of libc |
|
| - | 32 | * @{ |
|
| - | 33 | */ |
|
| - | 34 | /** @file |
|
| - | 35 | */ |
|
| - | 36 | ||
| 29 | #ifndef __amd64_ATOMIC_H__ |
37 | #ifndef __amd64_ATOMIC_H__ |
| 30 | #define __amd64_ATOMIC_H__ |
38 | #define __amd64_ATOMIC_H__ |
| 31 | 39 | ||
| 32 | static inline void atomic_inc(atomic_t *val) { |
40 | static inline void atomic_inc(atomic_t *val) { |
| 33 | __asm__ volatile ("lock incq %0\n" : "=m" (val->count)); |
41 | __asm__ volatile ("lock incq %0\n" : "=m" (val->count)); |
| 34 | } |
42 | } |
| 35 | 43 | ||
| 36 | static inline void atomic_dec(atomic_t *val) { |
44 | static inline void atomic_dec(atomic_t *val) { |
| 37 | __asm__ volatile ("lock decq %0\n" : "=m" (val->count)); |
45 | __asm__ volatile ("lock decq %0\n" : "=m" (val->count)); |
| 38 | } |
46 | } |
| 39 | 47 | ||
| 40 | static inline long atomic_postinc(atomic_t *val) |
48 | static inline long atomic_postinc(atomic_t *val) |
| 41 | { |
49 | { |
| 42 | long r; |
50 | long r; |
| 43 | 51 | ||
| 44 | __asm__ volatile ( |
52 | __asm__ volatile ( |
| 45 | "movq $1, %0\n" |
53 | "movq $1, %0\n" |
| 46 | "lock xaddq %0, %1\n" |
54 | "lock xaddq %0, %1\n" |
| 47 | : "=r" (r), "=m" (val->count) |
55 | : "=r" (r), "=m" (val->count) |
| 48 | ); |
56 | ); |
| 49 | 57 | ||
| 50 | return r; |
58 | return r; |
| 51 | } |
59 | } |
| 52 | 60 | ||
| 53 | static inline long atomic_postdec(atomic_t *val) |
61 | static inline long atomic_postdec(atomic_t *val) |
| 54 | { |
62 | { |
| 55 | long r; |
63 | long r; |
| 56 | 64 | ||
| 57 | __asm__ volatile ( |
65 | __asm__ volatile ( |
| 58 | "movq $-1, %0\n" |
66 | "movq $-1, %0\n" |
| 59 | "lock xaddq %0, %1\n" |
67 | "lock xaddq %0, %1\n" |
| 60 | : "=r" (r), "=m" (val->count) |
68 | : "=r" (r), "=m" (val->count) |
| 61 | ); |
69 | ); |
| 62 | 70 | ||
| 63 | return r; |
71 | return r; |
| 64 | } |
72 | } |
| 65 | 73 | ||
| 66 | #define atomic_preinc(val) (atomic_postinc(val)+1) |
74 | #define atomic_preinc(val) (atomic_postinc(val)+1) |
| 67 | #define atomic_predec(val) (atomic_postdec(val)-1) |
75 | #define atomic_predec(val) (atomic_postdec(val)-1) |
| 68 | 76 | ||
| 69 | #endif |
77 | #endif |
| - | 78 | ||
| - | 79 | ||
| - | 80 | /** @} |
|
| - | 81 | */ |
|
| - | 82 | ||
| - | 83 | ||
| 70 | 84 | ||