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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 | |
12c61747 BP |
19 | #ifdef CONFIG_X86 |
20 | #include <asm/cpufeature.h> /* for boot_cpu_has below */ | |
21 | #endif | |
22 | ||
41b9e9fc PZ |
23 | #define TEST(bit, op, c_op, val) \ |
24 | do { \ | |
25 | atomic##bit##_set(&v, v0); \ | |
26 | r = v0; \ | |
27 | atomic##bit##_##op(val, &v); \ | |
28 | r c_op val; \ | |
29 | WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \ | |
30 | (unsigned long long)atomic##bit##_read(&v), \ | |
31 | (unsigned long long)r); \ | |
32 | } while (0) | |
33 | ||
34 | static __init void test_atomic(void) | |
35 | { | |
36 | int v0 = 0xaaa31337; | |
37 | int v1 = 0xdeadbeef; | |
38 | int onestwos = 0x11112222; | |
39 | int one = 1; | |
40 | ||
41 | atomic_t v; | |
42 | int r; | |
43 | ||
44 | TEST(, add, +=, onestwos); | |
45 | TEST(, add, +=, -one); | |
46 | TEST(, sub, -=, onestwos); | |
47 | TEST(, sub, -=, -one); | |
48 | TEST(, or, |=, v1); | |
49 | TEST(, and, &=, v1); | |
50 | TEST(, xor, ^=, v1); | |
51 | TEST(, andnot, &= ~, v1); | |
52 | } | |
53 | ||
86a89380 | 54 | #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0) |
41b9e9fc | 55 | static __init void test_atomic64(void) |
86a89380 LB |
56 | { |
57 | long long v0 = 0xaaa31337c001d00dLL; | |
58 | long long v1 = 0xdeadbeefdeafcafeLL; | |
59 | long long v2 = 0xfaceabadf00df001LL; | |
60 | long long onestwos = 0x1111111122222222LL; | |
61 | long long one = 1LL; | |
62 | ||
63 | atomic64_t v = ATOMIC64_INIT(v0); | |
64 | long long r = v0; | |
65 | BUG_ON(v.counter != r); | |
66 | ||
67 | atomic64_set(&v, v1); | |
68 | r = v1; | |
69 | BUG_ON(v.counter != r); | |
70 | BUG_ON(atomic64_read(&v) != r); | |
71 | ||
41b9e9fc PZ |
72 | TEST(64, add, +=, onestwos); |
73 | TEST(64, add, +=, -one); | |
74 | TEST(64, sub, -=, onestwos); | |
75 | TEST(64, sub, -=, -one); | |
76 | TEST(64, or, |=, v1); | |
77 | TEST(64, and, &=, v1); | |
78 | TEST(64, xor, ^=, v1); | |
79 | TEST(64, andnot, &= ~, v1); | |
86a89380 LB |
80 | |
81 | INIT(v0); | |
82 | r += onestwos; | |
83 | BUG_ON(atomic64_add_return(onestwos, &v) != r); | |
84 | BUG_ON(v.counter != r); | |
85 | ||
86 | INIT(v0); | |
87 | r += -one; | |
88 | BUG_ON(atomic64_add_return(-one, &v) != r); | |
89 | BUG_ON(v.counter != r); | |
90 | ||
86a89380 LB |
91 | INIT(v0); |
92 | r -= onestwos; | |
93 | BUG_ON(atomic64_sub_return(onestwos, &v) != r); | |
94 | BUG_ON(v.counter != r); | |
95 | ||
96 | INIT(v0); | |
97 | r -= -one; | |
98 | BUG_ON(atomic64_sub_return(-one, &v) != r); | |
99 | BUG_ON(v.counter != r); | |
100 | ||
101 | INIT(v0); | |
102 | atomic64_inc(&v); | |
103 | r += one; | |
104 | BUG_ON(v.counter != r); | |
105 | ||
106 | INIT(v0); | |
107 | r += one; | |
108 | BUG_ON(atomic64_inc_return(&v) != r); | |
109 | BUG_ON(v.counter != r); | |
110 | ||
111 | INIT(v0); | |
112 | atomic64_dec(&v); | |
113 | r -= one; | |
114 | BUG_ON(v.counter != r); | |
115 | ||
116 | INIT(v0); | |
117 | r -= one; | |
118 | BUG_ON(atomic64_dec_return(&v) != r); | |
119 | BUG_ON(v.counter != r); | |
120 | ||
121 | INIT(v0); | |
122 | BUG_ON(atomic64_xchg(&v, v1) != v0); | |
123 | r = v1; | |
124 | BUG_ON(v.counter != r); | |
125 | ||
126 | INIT(v0); | |
127 | BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0); | |
128 | r = v1; | |
129 | BUG_ON(v.counter != r); | |
130 | ||
131 | INIT(v0); | |
132 | BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0); | |
133 | BUG_ON(v.counter != r); | |
134 | ||
135 | INIT(v0); | |
9efbcd59 | 136 | BUG_ON(atomic64_add_unless(&v, one, v0)); |
86a89380 LB |
137 | BUG_ON(v.counter != r); |
138 | ||
139 | INIT(v0); | |
9efbcd59 | 140 | BUG_ON(!atomic64_add_unless(&v, one, v1)); |
86a89380 LB |
141 | r += one; |
142 | BUG_ON(v.counter != r); | |
143 | ||
7463449b | 144 | #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
86a89380 LB |
145 | INIT(onestwos); |
146 | BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1)); | |
147 | r -= one; | |
148 | BUG_ON(v.counter != r); | |
149 | ||
150 | INIT(0); | |
151 | BUG_ON(atomic64_dec_if_positive(&v) != -one); | |
152 | BUG_ON(v.counter != r); | |
153 | ||
154 | INIT(-one); | |
155 | BUG_ON(atomic64_dec_if_positive(&v) != (-one - one)); | |
156 | BUG_ON(v.counter != r); | |
8f4f202b | 157 | #else |
7463449b | 158 | #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol |
8f4f202b | 159 | #endif |
86a89380 LB |
160 | |
161 | INIT(onestwos); | |
25a304f2 | 162 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
163 | r += one; |
164 | BUG_ON(v.counter != r); | |
165 | ||
166 | INIT(0); | |
25a304f2 | 167 | BUG_ON(atomic64_inc_not_zero(&v)); |
86a89380 LB |
168 | BUG_ON(v.counter != r); |
169 | ||
170 | INIT(-one); | |
25a304f2 | 171 | BUG_ON(!atomic64_inc_not_zero(&v)); |
86a89380 LB |
172 | r += one; |
173 | BUG_ON(v.counter != r); | |
41b9e9fc PZ |
174 | } |
175 | ||
176 | static __init int test_atomics(void) | |
177 | { | |
178 | test_atomic(); | |
179 | test_atomic64(); | |
86a89380 LB |
180 | |
181 | #ifdef CONFIG_X86 | |
b3b16d28 | 182 | pr_info("passed for %s platform %s CX8 and %s SSE\n", |
a5c9161f | 183 | #ifdef CONFIG_X86_64 |
b3b16d28 | 184 | "x86-64", |
a5c9161f | 185 | #elif defined(CONFIG_X86_CMPXCHG64) |
b3b16d28 | 186 | "i586+", |
86a89380 | 187 | #else |
b3b16d28 | 188 | "i386+", |
86a89380 | 189 | #endif |
a5c9161f PA |
190 | boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without", |
191 | boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without"); | |
86a89380 | 192 | #else |
b3b16d28 | 193 | pr_info("passed\n"); |
86a89380 LB |
194 | #endif |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
41b9e9fc | 199 | core_initcall(test_atomics); |