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gerrit-public.fairphone.software / kernel / msm-4.9 / 86a8938078a8bb518c5376de493e348c7490d506 / . / lib / atomic64_test.c
blob: 4ff649e46bad24936694920112c220b70b06f013 [file] [log] [blame]
Luca Barbieri86a89382010-02-24 10:54:24 +0100[diff] [blame^]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 <asm/atomic.h>
13
14#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
15static __init int test_atomic64(void)
16{
17 long long v0 = 0xaaa31337c001d00dLL;
18 long long v1 = 0xdeadbeefdeafcafeLL;
19 long long v2 = 0xfaceabadf00df001LL;
20 long long onestwos = 0x1111111122222222LL;
21 long long one = 1LL;
22
23 atomic64_t v = ATOMIC64_INIT(v0);
24 long long r = v0;
25 BUG_ON(v.counter != r);
26
27 atomic64_set(&v, v1);
28 r = v1;
29 BUG_ON(v.counter != r);
30 BUG_ON(atomic64_read(&v) != r);
31
32 INIT(v0);
33 atomic64_add(onestwos, &v);
34 r += onestwos;
35 BUG_ON(v.counter != r);
36
37 INIT(v0);
38 atomic64_add(-one, &v);
39 r += -one;
40 BUG_ON(v.counter != r);
41
42 INIT(v0);
43 r += onestwos;
44 BUG_ON(atomic64_add_return(onestwos, &v) != r);
45 BUG_ON(v.counter != r);
46
47 INIT(v0);
48 r += -one;
49 BUG_ON(atomic64_add_return(-one, &v) != r);
50 BUG_ON(v.counter != r);
51
52 INIT(v0);
53 atomic64_sub(onestwos, &v);
54 r -= onestwos;
55 BUG_ON(v.counter != r);
56
57 INIT(v0);
58 atomic64_sub(-one, &v);
59 r -= -one;
60 BUG_ON(v.counter != r);
61
62 INIT(v0);
63 r -= onestwos;
64 BUG_ON(atomic64_sub_return(onestwos, &v) != r);
65 BUG_ON(v.counter != r);
66
67 INIT(v0);
68 r -= -one;
69 BUG_ON(atomic64_sub_return(-one, &v) != r);
70 BUG_ON(v.counter != r);
71
72 INIT(v0);
73 atomic64_inc(&v);
74 r += one;
75 BUG_ON(v.counter != r);
76
77 INIT(v0);
78 r += one;
79 BUG_ON(atomic64_inc_return(&v) != r);
80 BUG_ON(v.counter != r);
81
82 INIT(v0);
83 atomic64_dec(&v);
84 r -= one;
85 BUG_ON(v.counter != r);
86
87 INIT(v0);
88 r -= one;
89 BUG_ON(atomic64_dec_return(&v) != r);
90 BUG_ON(v.counter != r);
91
92 INIT(v0);
93 BUG_ON(atomic64_xchg(&v, v1) != v0);
94 r = v1;
95 BUG_ON(v.counter != r);
96
97 INIT(v0);
98 BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
99 r = v1;
100 BUG_ON(v.counter != r);
101
102 INIT(v0);
103 BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
104 BUG_ON(v.counter != r);
105
106 INIT(v0);
107 BUG_ON(!atomic64_add_unless(&v, one, v0));
108 BUG_ON(v.counter != r);
109
110 INIT(v0);
111 BUG_ON(atomic64_add_unless(&v, one, v1));
112 r += one;
113 BUG_ON(v.counter != r);
114
115 INIT(onestwos);
116 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
117 r -= one;
118 BUG_ON(v.counter != r);
119
120 INIT(0);
121 BUG_ON(atomic64_dec_if_positive(&v) != -one);
122 BUG_ON(v.counter != r);
123
124 INIT(-one);
125 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
126 BUG_ON(v.counter != r);
127
128 INIT(onestwos);
129 BUG_ON(atomic64_inc_not_zero(&v));
130 r += one;
131 BUG_ON(v.counter != r);
132
133 INIT(0);
134 BUG_ON(!atomic64_inc_not_zero(&v));
135 BUG_ON(v.counter != r);
136
137 INIT(-one);
138 BUG_ON(atomic64_inc_not_zero(&v));
139 r += one;
140 BUG_ON(v.counter != r);
141
142#ifdef CONFIG_X86
143 printk(KERN_INFO "atomic64 test passed for %s+ platform %s CX8 and %s SSE\n",
144#ifdef CONFIG_X86_CMPXCHG64
145 "586",
146#else
147 "386",
148#endif
149 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
150 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
151#else
152 printk(KERN_INFO "atomic64 test passed\n");
153#endif
154
155 return 0;
156}
157
158core_initcall(test_atomic64);