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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)
17static __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
166core_initcall(test_atomic64);
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
12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14#include <linux/init.h>
15#include <linux/bug.h>
16#include <linux/kernel.h>
17#include <linux/atomic.h>
18
19#ifdef CONFIG_X86
20#include <asm/cpufeature.h> /* for boot_cpu_has below */
21#endif
22
23#define TEST(bit, op, c_op, val) \
24do { \
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/*
35 * Test for a atomic operation family,
36 * @test should be a macro accepting parameters (bit, op, ...)
37 */
38
39#define FAMILY_TEST(test, bit, op, args...) \
40do { \
41 test(bit, op, ##args); \
42 test(bit, op##_acquire, ##args); \
43 test(bit, op##_release, ##args); \
44 test(bit, op##_relaxed, ##args); \
45} while (0)
46
47#define TEST_RETURN(bit, op, c_op, val) \
48do { \
49 atomic##bit##_set(&v, v0); \
50 r = v0; \
51 r c_op val; \
52 BUG_ON(atomic##bit##_##op(val, &v) != r); \
53 BUG_ON(atomic##bit##_read(&v) != r); \
54} while (0)
55
56#define TEST_FETCH(bit, op, c_op, val) \
57do { \
58 atomic##bit##_set(&v, v0); \
59 r = v0; \
60 r c_op val; \
61 BUG_ON(atomic##bit##_##op(val, &v) != v0); \
62 BUG_ON(atomic##bit##_read(&v) != r); \
63} while (0)
64
65#define RETURN_FAMILY_TEST(bit, op, c_op, val) \
66do { \
67 FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \
68} while (0)
69
70#define FETCH_FAMILY_TEST(bit, op, c_op, val) \
71do { \
72 FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \
73} while (0)
74
75#define TEST_ARGS(bit, op, init, ret, expect, args...) \
76do { \
77 atomic##bit##_set(&v, init); \
78 BUG_ON(atomic##bit##_##op(&v, ##args) != ret); \
79 BUG_ON(atomic##bit##_read(&v) != expect); \
80} while (0)
81
82#define XCHG_FAMILY_TEST(bit, init, new) \
83do { \
84 FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new); \
85} while (0)
86
87#define CMPXCHG_FAMILY_TEST(bit, init, new, wrong) \
88do { \
89 FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
90 init, init, new, init, new); \
91 FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
92 init, init, init, wrong, new); \
93} while (0)
94
95#define INC_RETURN_FAMILY_TEST(bit, i) \
96do { \
97 FAMILY_TEST(TEST_ARGS, bit, inc_return, \
98 i, (i) + one, (i) + one); \
99} while (0)
100
101#define DEC_RETURN_FAMILY_TEST(bit, i) \
102do { \
103 FAMILY_TEST(TEST_ARGS, bit, dec_return, \
104 i, (i) - one, (i) - one); \
105} while (0)
106
107static __init void test_atomic(void)
108{
109 int v0 = 0xaaa31337;
110 int v1 = 0xdeadbeef;
111 int onestwos = 0x11112222;
112 int one = 1;
113
114 atomic_t v;
115 int r;
116
117 TEST(, add, +=, onestwos);
118 TEST(, add, +=, -one);
119 TEST(, sub, -=, onestwos);
120 TEST(, sub, -=, -one);
121 TEST(, or, |=, v1);
122 TEST(, and, &=, v1);
123 TEST(, xor, ^=, v1);
124 TEST(, andnot, &= ~, v1);
125
126 RETURN_FAMILY_TEST(, add_return, +=, onestwos);
127 RETURN_FAMILY_TEST(, add_return, +=, -one);
128 RETURN_FAMILY_TEST(, sub_return, -=, onestwos);
129 RETURN_FAMILY_TEST(, sub_return, -=, -one);
130
131 FETCH_FAMILY_TEST(, fetch_add, +=, onestwos);
132 FETCH_FAMILY_TEST(, fetch_add, +=, -one);
133 FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos);
134 FETCH_FAMILY_TEST(, fetch_sub, -=, -one);
135
136 FETCH_FAMILY_TEST(, fetch_or, |=, v1);
137 FETCH_FAMILY_TEST(, fetch_and, &=, v1);
138 FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1);
139 FETCH_FAMILY_TEST(, fetch_xor, ^=, v1);
140
141 INC_RETURN_FAMILY_TEST(, v0);
142 DEC_RETURN_FAMILY_TEST(, v0);
143
144 XCHG_FAMILY_TEST(, v0, v1);
145 CMPXCHG_FAMILY_TEST(, v0, v1, onestwos);
146
147}
148
149#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
150static __init void test_atomic64(void)
151{
152 long long v0 = 0xaaa31337c001d00dLL;
153 long long v1 = 0xdeadbeefdeafcafeLL;
154 long long v2 = 0xfaceabadf00df001LL;
155 long long onestwos = 0x1111111122222222LL;
156 long long one = 1LL;
157
158 atomic64_t v = ATOMIC64_INIT(v0);
159 long long r = v0;
160 BUG_ON(v.counter != r);
161
162 atomic64_set(&v, v1);
163 r = v1;
164 BUG_ON(v.counter != r);
165 BUG_ON(atomic64_read(&v) != r);
166
167 TEST(64, add, +=, onestwos);
168 TEST(64, add, +=, -one);
169 TEST(64, sub, -=, onestwos);
170 TEST(64, sub, -=, -one);
171 TEST(64, or, |=, v1);
172 TEST(64, and, &=, v1);
173 TEST(64, xor, ^=, v1);
174 TEST(64, andnot, &= ~, v1);
175
176 RETURN_FAMILY_TEST(64, add_return, +=, onestwos);
177 RETURN_FAMILY_TEST(64, add_return, +=, -one);
178 RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
179 RETURN_FAMILY_TEST(64, sub_return, -=, -one);
180
181 FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
182 FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
183 FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
184 FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);
185
186 FETCH_FAMILY_TEST(64, fetch_or, |=, v1);
187 FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
188 FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
189 FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);
190
191 INIT(v0);
192 atomic64_inc(&v);
193 r += one;
194 BUG_ON(v.counter != r);
195
196 INIT(v0);
197 atomic64_dec(&v);
198 r -= one;
199 BUG_ON(v.counter != r);
200
201 INC_RETURN_FAMILY_TEST(64, v0);
202 DEC_RETURN_FAMILY_TEST(64, v0);
203
204 XCHG_FAMILY_TEST(64, v0, v1);
205 CMPXCHG_FAMILY_TEST(64, v0, v1, v2);
206
207 INIT(v0);
208 BUG_ON(atomic64_add_unless(&v, one, v0));
209 BUG_ON(v.counter != r);
210
211 INIT(v0);
212 BUG_ON(!atomic64_add_unless(&v, one, v1));
213 r += one;
214 BUG_ON(v.counter != r);
215
216 INIT(onestwos);
217 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
218 r -= one;
219 BUG_ON(v.counter != r);
220
221 INIT(0);
222 BUG_ON(atomic64_dec_if_positive(&v) != -one);
223 BUG_ON(v.counter != r);
224
225 INIT(-one);
226 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
227 BUG_ON(v.counter != r);
228
229 INIT(onestwos);
230 BUG_ON(!atomic64_inc_not_zero(&v));
231 r += one;
232 BUG_ON(v.counter != r);
233
234 INIT(0);
235 BUG_ON(atomic64_inc_not_zero(&v));
236 BUG_ON(v.counter != r);
237
238 INIT(-one);
239 BUG_ON(!atomic64_inc_not_zero(&v));
240 r += one;
241 BUG_ON(v.counter != r);
242}
243
244static __init int test_atomics(void)
245{
246 test_atomic();
247 test_atomic64();
248
249#ifdef CONFIG_X86
250 pr_info("passed for %s platform %s CX8 and %s SSE\n",
251#ifdef CONFIG_X86_64
252 "x86-64",
253#elif defined(CONFIG_X86_CMPXCHG64)
254 "i586+",
255#else
256 "i386+",
257#endif
258 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
259 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
260#else
261 pr_info("passed\n");
262#endif
263
264 return 0;
265}
266
267core_initcall(test_atomics);