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1 | /* |
2 | * Testsuite for atomic64_t functions |
3 | * |
4 | * Copyright © 2010 Luca Barbieri |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | */ |
11 | #include <linux/init.h> |
12 | #include <linux/bug.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/atomic.h> |
15 | |
16 | #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0) |
17 | static __init int test_atomic64(void) |
18 | { |
19 | long long v0 = 0xaaa31337c001d00dLL; |
20 | long long v1 = 0xdeadbeefdeafcafeLL; |
21 | long long v2 = 0xfaceabadf00df001LL; |
22 | long long onestwos = 0x1111111122222222LL; |
23 | long long one = 1LL; |
24 | |
25 | atomic64_t v = ATOMIC64_INIT(v0); |
26 | long long r = v0; |
27 | BUG_ON(v.counter != r); |
28 | |
29 | atomic64_set(&v, v1); |
30 | r = v1; |
31 | BUG_ON(v.counter != r); |
32 | BUG_ON(atomic64_read(&v) != r); |
33 | |
34 | INIT(v0); |
35 | atomic64_add(onestwos, &v); |
36 | r += onestwos; |
37 | BUG_ON(v.counter != r); |
38 | |
39 | INIT(v0); |
40 | atomic64_add(-one, &v); |
41 | r += -one; |
42 | BUG_ON(v.counter != r); |
43 | |
44 | INIT(v0); |
45 | r += onestwos; |
46 | BUG_ON(atomic64_add_return(onestwos, &v) != r); |
47 | BUG_ON(v.counter != r); |
48 | |
49 | INIT(v0); |
50 | r += -one; |
51 | BUG_ON(atomic64_add_return(-one, &v) != r); |
52 | BUG_ON(v.counter != r); |
53 | |
54 | INIT(v0); |
55 | atomic64_sub(onestwos, &v); |
56 | r -= onestwos; |
57 | BUG_ON(v.counter != r); |
58 | |
59 | INIT(v0); |
60 | atomic64_sub(-one, &v); |
61 | r -= -one; |
62 | BUG_ON(v.counter != r); |
63 | |
64 | INIT(v0); |
65 | r -= onestwos; |
66 | BUG_ON(atomic64_sub_return(onestwos, &v) != r); |
67 | BUG_ON(v.counter != r); |
68 | |
69 | INIT(v0); |
70 | r -= -one; |
71 | BUG_ON(atomic64_sub_return(-one, &v) != r); |
72 | BUG_ON(v.counter != r); |
73 | |
74 | INIT(v0); |
75 | atomic64_inc(&v); |
76 | r += one; |
77 | BUG_ON(v.counter != r); |
78 | |
79 | INIT(v0); |
80 | r += one; |
81 | BUG_ON(atomic64_inc_return(&v) != r); |
82 | BUG_ON(v.counter != r); |
83 | |
84 | INIT(v0); |
85 | atomic64_dec(&v); |
86 | r -= one; |
87 | BUG_ON(v.counter != r); |
88 | |
89 | INIT(v0); |
90 | r -= one; |
91 | BUG_ON(atomic64_dec_return(&v) != r); |
92 | BUG_ON(v.counter != r); |
93 | |
94 | INIT(v0); |
95 | BUG_ON(atomic64_xchg(&v, v1) != v0); |
96 | r = v1; |
97 | BUG_ON(v.counter != r); |
98 | |
99 | INIT(v0); |
100 | BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0); |
101 | r = v1; |
102 | BUG_ON(v.counter != r); |
103 | |
104 | INIT(v0); |
105 | BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0); |
106 | BUG_ON(v.counter != r); |
107 | |
108 | INIT(v0); |
109 | BUG_ON(atomic64_add_unless(&v, one, v0)); |
110 | BUG_ON(v.counter != r); |
111 | |
112 | INIT(v0); |
113 | BUG_ON(!atomic64_add_unless(&v, one, v1)); |
114 | r += one; |
115 | BUG_ON(v.counter != r); |
116 | |
117 | #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
118 | INIT(onestwos); |
119 | BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1)); |
120 | r -= one; |
121 | BUG_ON(v.counter != r); |
122 | |
123 | INIT(0); |
124 | BUG_ON(atomic64_dec_if_positive(&v) != -one); |
125 | BUG_ON(v.counter != r); |
126 | |
127 | INIT(-one); |
128 | BUG_ON(atomic64_dec_if_positive(&v) != (-one - one)); |
129 | BUG_ON(v.counter != r); |
130 | #else |
131 | #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol |
132 | #endif |
133 | |
134 | INIT(onestwos); |
135 | BUG_ON(!atomic64_inc_not_zero(&v)); |
136 | r += one; |
137 | BUG_ON(v.counter != r); |
138 | |
139 | INIT(0); |
140 | BUG_ON(atomic64_inc_not_zero(&v)); |
141 | BUG_ON(v.counter != r); |
142 | |
143 | INIT(-one); |
144 | BUG_ON(!atomic64_inc_not_zero(&v)); |
145 | r += one; |
146 | BUG_ON(v.counter != r); |
147 | |
148 | #ifdef CONFIG_X86 |
149 | printk(KERN_INFO "atomic64 test passed for %s platform %s CX8 and %s SSE\n", |
150 | #ifdef CONFIG_X86_64 |
151 | "x86-64", |
152 | #elif defined(CONFIG_X86_CMPXCHG64) |
153 | "i586+", |
154 | #else |
155 | "i386+", |
156 | #endif |
157 | boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without", |
158 | boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without"); |
159 | #else |
160 | printk(KERN_INFO "atomic64 test passed\n"); |
161 | #endif |
162 | |
163 | return 0; |
164 | } |
165 | |
166 | core_initcall(test_atomic64); |
167 |
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