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58de5a4b MD |
1 | #ifndef _URCU_ARCH_UATOMIC_SPARC64_H |
2 | #define _URCU_ARCH_UATOMIC_SPARC64_H | |
3 | ||
4 | /* | |
5 | * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. | |
6 | * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved. | |
7 | * Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved. | |
8 | * Copyright (c) 2009 Mathieu Desnoyers | |
9 | * | |
10 | * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED | |
11 | * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. | |
12 | * | |
13 | * Permission is hereby granted to use or copy this program | |
14 | * for any purpose, provided the above notices are retained on all copies. | |
15 | * Permission to modify the code and to distribute modified code is granted, | |
16 | * provided the above notices are retained, and a notice that the code was | |
17 | * modified is included with the above copyright notice. | |
18 | * | |
19 | * Code inspired from libuatomic_ops-1.2, inherited in part from the | |
20 | * Boehm-Demers-Weiser conservative garbage collector. | |
21 | */ | |
22 | ||
23 | #include <urcu/compiler.h> | |
24 | #include <urcu/system.h> | |
25 | ||
36bc70a8 MD |
26 | #ifdef __cplusplus |
27 | extern "C" { | |
28 | #endif | |
29 | ||
58de5a4b | 30 | #ifndef __SIZEOF_LONG__ |
795d506a | 31 | #ifdef __LP64__ |
58de5a4b MD |
32 | #define __SIZEOF_LONG__ 8 |
33 | #else | |
34 | #define __SIZEOF_LONG__ 4 | |
35 | #endif | |
36 | #endif | |
37 | ||
38 | #ifndef BITS_PER_LONG | |
39 | #define BITS_PER_LONG (__SIZEOF_LONG__ * 8) | |
40 | #endif | |
41 | ||
58de5a4b MD |
42 | /* cmpxchg */ |
43 | ||
44 | static inline __attribute__((always_inline)) | |
45 | unsigned long _uatomic_cmpxchg(void *addr, unsigned long old, | |
46 | unsigned long _new, int len) | |
47 | { | |
48 | switch (len) { | |
49 | case 4: | |
50 | { | |
51 | __asm__ __volatile__ ( | |
52 | "membar #StoreLoad | #LoadLoad\n\t" | |
53 | "cas [%1],%2,%0\n\t" | |
54 | "membar #StoreLoad | #StoreStore\n\t" | |
55 | : "+&r" (_new) | |
56 | : "r" (addr), "r" (old) | |
57 | : "memory"); | |
58 | ||
59 | return _new; | |
60 | } | |
61 | #if (BITS_PER_LONG == 64) | |
62 | case 8: | |
63 | { | |
64 | __asm__ __volatile__ ( | |
65 | "membar #StoreLoad | #LoadLoad\n\t" | |
66 | "casx [%1],%2,%0\n\t" | |
67 | "membar #StoreLoad | #StoreStore\n\t" | |
68 | : "+&r" (_new) | |
69 | : "r" (addr), "r" (old) | |
70 | : "memory"); | |
71 | ||
72 | return _new; | |
73 | } | |
74 | #endif | |
75 | } | |
76 | __builtin_trap(); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | ||
81 | #define uatomic_cmpxchg(addr, old, _new) \ | |
82 | ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\ | |
83 | (unsigned long)(_new), \ | |
84 | sizeof(*(addr)))) | |
85 | ||
86 | /* xchg */ | |
87 | ||
88 | static inline __attribute__((always_inline)) | |
89 | unsigned long _uatomic_exchange(void *addr, unsigned long val, int len) | |
90 | { | |
91 | switch (len) { | |
92 | case 4: | |
93 | { | |
c0a68bfa | 94 | unsigned int old, oldt; |
58de5a4b | 95 | |
c0a68bfa | 96 | oldt = uatomic_read((unsigned int *)addr); |
58de5a4b MD |
97 | do { |
98 | old = oldt; | |
99 | oldt = _uatomic_cmpxchg(addr, old, val, 4); | |
100 | } while (oldt != old); | |
101 | ||
102 | return old; | |
103 | } | |
104 | #if (BITS_PER_LONG == 64) | |
105 | case 8: | |
106 | { | |
c0a68bfa | 107 | unsigned long old, oldt; |
58de5a4b | 108 | |
c0a68bfa | 109 | oldt = uatomic_read((unsigned long *)addr); |
58de5a4b MD |
110 | do { |
111 | old = oldt; | |
112 | oldt = _uatomic_cmpxchg(addr, old, val, 8); | |
113 | } while (oldt != old); | |
114 | ||
115 | return old; | |
116 | } | |
117 | #endif | |
118 | } | |
119 | __builtin_trap(); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | #define uatomic_xchg(addr, v) \ | |
124 | ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \ | |
125 | sizeof(*(addr)))) | |
126 | ||
127 | /* uatomic_add_return */ | |
128 | ||
129 | static inline __attribute__((always_inline)) | |
9c697e4d | 130 | unsigned long _uatomic_add_return(void *addr, unsigned long val, int len) |
58de5a4b MD |
131 | { |
132 | switch (len) { | |
133 | case 4: | |
134 | { | |
c0a68bfa | 135 | unsigned int old, oldt; |
58de5a4b | 136 | |
c0a68bfa | 137 | oldt = uatomic_read((unsigned int *)addr); |
58de5a4b MD |
138 | do { |
139 | old = oldt; | |
140 | oldt = _uatomic_cmpxchg(addr, old, old + val, 4); | |
141 | } while (oldt != old); | |
142 | ||
143 | return old + val; | |
144 | } | |
145 | #if (BITS_PER_LONG == 64) | |
146 | case 8: | |
147 | { | |
c0a68bfa | 148 | unsigned long old, oldt; |
58de5a4b | 149 | |
c0a68bfa | 150 | oldt = uatomic_read((unsigned long *)addr); |
58de5a4b MD |
151 | do { |
152 | old = oldt; | |
153 | oldt = _uatomic_cmpxchg(addr, old, old + val, 8); | |
154 | } while (oldt != old); | |
155 | ||
156 | return old + val; | |
157 | } | |
158 | #endif | |
159 | } | |
160 | __builtin_trap(); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | #define uatomic_add_return(addr, v) \ | |
165 | ((__typeof__(*(addr))) _uatomic_add_return((addr), \ | |
166 | (unsigned long)(v), \ | |
167 | sizeof(*(addr)))) | |
168 | ||
36bc70a8 MD |
169 | #ifdef __cplusplus |
170 | } | |
171 | #endif | |
172 | ||
8760d94e PB |
173 | #include <urcu/uatomic_generic.h> |
174 | ||
58de5a4b | 175 | #endif /* _URCU_ARCH_UATOMIC_PPC_H */ |