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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 MD |
30 | /* cmpxchg */ |
31 | ||
32 | static inline __attribute__((always_inline)) | |
33 | unsigned long _uatomic_cmpxchg(void *addr, unsigned long old, | |
34 | unsigned long _new, int len) | |
35 | { | |
36 | switch (len) { | |
37 | case 4: | |
38 | { | |
39 | __asm__ __volatile__ ( | |
40 | "membar #StoreLoad | #LoadLoad\n\t" | |
41 | "cas [%1],%2,%0\n\t" | |
42 | "membar #StoreLoad | #StoreStore\n\t" | |
43 | : "+&r" (_new) | |
44 | : "r" (addr), "r" (old) | |
45 | : "memory"); | |
46 | ||
47 | return _new; | |
48 | } | |
b39e1761 | 49 | #if (CAA_BITS_PER_LONG == 64) |
58de5a4b MD |
50 | case 8: |
51 | { | |
52 | __asm__ __volatile__ ( | |
53 | "membar #StoreLoad | #LoadLoad\n\t" | |
54 | "casx [%1],%2,%0\n\t" | |
55 | "membar #StoreLoad | #StoreStore\n\t" | |
56 | : "+&r" (_new) | |
57 | : "r" (addr), "r" (old) | |
58 | : "memory"); | |
59 | ||
60 | return _new; | |
61 | } | |
62 | #endif | |
63 | } | |
64 | __builtin_trap(); | |
65 | return 0; | |
66 | } | |
67 | ||
68 | ||
69 | #define uatomic_cmpxchg(addr, old, _new) \ | |
70 | ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\ | |
71 | (unsigned long)(_new), \ | |
72 | sizeof(*(addr)))) | |
73 | ||
36bc70a8 MD |
74 | #ifdef __cplusplus |
75 | } | |
76 | #endif | |
77 | ||
8760d94e PB |
78 | #include <urcu/uatomic_generic.h> |
79 | ||
58de5a4b | 80 | #endif /* _URCU_ARCH_UATOMIC_PPC_H */ |