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86a89380 LB |
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 | */ | |
b3b16d28 FF |
11 | |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
13 | ||
86a89380 | 14 | #include <linux/init.h> |
50af5ead | 15 | #include <linux/bug.h> |
0dbdd1bf | 16 | #include <linux/kernel.h> |
60063497 | 17 | #include <linux/atomic.h> |
86a89380 | 18 | |
41b9e9fc PZ |
19 | #define TEST(bit, op, c_op, val) \ |
20 | do { \ | |
21 | atomic##bit##_set(&v, v0); \ | |
22 | r = v0; \ | |
23 | atomic##bit##_##op(val, &v); \ | |
24 | r c_op val; \ | |
25 | WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \ | |
26 | (unsigned long long)atomic##bit##_read(&v), \ | |
27 | (unsigned long long)r); \ | |
28 | } while (0) | |
29 | ||
30 | static __init void test_atomic(void) | |
31 | { | |
32 | int v0 = 0xaaa31337; | |
33 | int v1 = 0xdeadbeef; | |
34 | int onestwos = 0x11112222; | |
35 | int one = 1; | |
36 | ||
37 | atomic_t v; | |
38 | int r; | |
39 | ||
40 | TEST(, add, +=, onestwos); | |
41 | TEST(, add, +=, -one); | |
42 | TEST(, sub, -=, onestwos); | |
43 | TEST(, sub, -=, -one); | |
44 | TEST(, or, |=, v1); | |
45 | TEST(, and, &=, v1); | |
46 | TEST(, xor, ^=, v1); | |
47 | TEST(, andnot, &= ~, v1); | |
48 | } | |
49 | ||
86a89380 | 50 | #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0) |
41b9e9fc | 51 | static __init void test_atomic64(void) |
86a89380 LB |
52 | { |
53 | long long v0 = 0xaaa31337c001d00dLL; | |
54 | long long v1 = 0xdeadbeefdeafcafeLL; | |
55 | long long v2 = 0xfaceabadf00df001LL; | |
56 | long long onestwos = 0x1111111122222222LL; | |
57 | long long one = 1LL; | |
58 | ||
59 | atomic64_t v = ATOMIC64_INIT(v0); | |
60 | long long r = v0; | |
61 | BUG_ON(v.counter != r); | |
62 | ||
63 | atomic64_set(&v, v1); | |
64 | r = v1; | |
65 | BUG_ON(v.counter != r); | |
66 | BUG_ON(atomic64_read(&v) != r); | |
67 | ||
41b9e9fc PZ |
68 | TEST(64, add, +=, onestwos); |
69 | TEST(64, add, +=, -one); | |
70 | TEST(64, sub, -=, onestwos); | |
71 | TEST(64, sub, -=, -one); | |
72 | TEST(64, or, |=, v1); | |
73 | TEST(64, and, &=, v1); | |
74 | TEST(64, xor, ^=, v1); | |
75 | TEST(64, andnot, &= ~, v1); | |
86a89380 LB |
76 | |
77 | INIT(v0); | |
78 | r += onestwos; | |
79 | BUG_ON(atomic64_add_return(onestwos, &v) != r); | |
80 | BUG_ON(v.counter != r); | |
81 | ||
82 | INIT(v0); | |
83 | r += -one; | |
84 | BUG_ON(atomic64_add_return(-one, &v) != r); | |
85 | BUG_ON(v.counter != r); | |
86 | ||
86a89380 LB |
87 | INIT(v0); |
88 | r -= onestwos; | |
89 | BUG_ON(atomic64_sub_return(onestwos, &v) != r); | |
90 | BUG_ON(v.counter != r); | |
91 | ||
92 | INIT(v0); | |
93 | r -= -one; | |
94 | BUG_ON(atomic64_sub_return(-one, &v) != r); | |
95 | BUG_ON(v.counter != r); | |
96 | ||
97 | INIT(v0); | |
98 | atomic64_inc(&v); | |
99 | r += one; | |
100 | BUG_ON(v.counter != r); | |
101 | ||
102 | INIT(v0); | |
103 | r += one; | |
104 | BUG_ON(atomic64_inc_return(&v) != r); | |
105 | BUG_ON(v.counter != r); | |
106 | ||
107 | INIT(v0); | |
108 | atomic64_dec(&v); | |
109 | r -= one; | |
110 | BUG_ON(v.counter != r); | |
111 | ||
112 | INIT(v0); | |
113 | r -= one; | |
114 | BUG_ON(atomic64_dec_return(&v) != r); | |
115 | BUG_ON(v.counter != r); | |
116 | ||
117 | INIT(v0); | |
118 | BUG_ON(atomic64_xchg(&v, v1) != v0); | |
119 | r = v1; | |
120 | BUG_ON(v.counter != r); | |
121 | ||
122 | INIT(v0); | |
123 | BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0); | |
124 | r = v1; | |
125 | BUG_ON(v.counter != r); | |
126 | ||
127 | INIT(v0); | |
128 | BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0); | |
129 | BUG_ON(v.counter != r); | |
130 | ||
131 | INIT(v0); | |
9efbcd59 | 132 | BUG_ON(atomic64_add_unless(&v, one, v0)); |
86a89380 LB |
133 | BUG_ON(v.counter != r); |
134 | ||
135 | INIT(v0); | |
9efbcd59 | 136 | BUG_ON(!atomic64_add_unless(&v, one, v1)); |
86a89380 LB |
137 | r += one; |
138 | BUG_ON(v.counter != r); | |
139 | ||
7463449b | 140 | #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
86a89380 LB |
141 | INIT(onestwos); |
142 | BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1)); | |
143 | r -= one; | |
144 | BUG_ON(v.counter != r); | |
145 | ||
146 | INIT(0); | |
147 | BUG_ON(atomic64_dec_if_positive(&v) != -one); | |
148 | BUG_ON(v.counter != r); | |
149 | ||
150 | INIT(-one); | |
151 | BUG_ON(atomic64_dec_if_positive(&v) != (-one - one)); | |
152 | BUG_ON(v.counter != r); | |
8f4f202b | 153 | #else |
7463449b | 154 | #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol |
8f4f202b | 155 | #endif |
86a89380 LB |
156 | |
157 | INIT(onestwos); | |
25a304f2 | 158 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
159 | r += one; |
160 | BUG_ON(v.counter != r); | |
161 | ||
162 | INIT(0); | |
25a304f2 | 163 | BUG_ON(atomic64_inc_not_zero(&v)); |
86a89380 LB |
164 | BUG_ON(v.counter != r); |
165 | ||
166 | INIT(-one); | |
25a304f2 | 167 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
168 | r += one; |
169 | BUG_ON(v.counter != r); | |
41b9e9fc PZ |
170 | } |
171 | ||
172 | static __init int test_atomics(void) | |
173 | { | |
174 | test_atomic(); | |
175 | test_atomic64(); | |
86a89380 LB |
176 | |
177 | #ifdef CONFIG_X86 | |
b3b16d28 | 178 | pr_info("passed for %s platform %s CX8 and %s SSE\n", |
a5c9161f | 179 | #ifdef CONFIG_X86_64 |
b3b16d28 | 180 | "x86-64", |
a5c9161f | 181 | #elif defined(CONFIG_X86_CMPXCHG64) |
b3b16d28 | 182 | "i586+", |
86a89380 | 183 | #else |
b3b16d28 | 184 | "i386+", |
86a89380 | 185 | #endif |
a5c9161f PA |
186 | boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without", |
187 | boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without"); | |
86a89380 | 188 | #else |
b3b16d28 | 189 | pr_info("passed\n"); |
86a89380 LB |
190 | #endif |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
41b9e9fc | 195 | core_initcall(test_atomics); |