2 * Testsuite for atomic64_t functions
4 * Copyright © 2010 Luca Barbieri
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.
11 #include <linux/init.h>
12 #include <asm/atomic.h>
14 #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
15 static __init int test_atomic64(void)
17 long long v0 = 0xaaa31337c001d00dLL;
18 long long v1 = 0xdeadbeefdeafcafeLL;
19 long long v2 = 0xfaceabadf00df001LL;
20 long long onestwos = 0x1111111122222222LL;
23 atomic64_t v = ATOMIC64_INIT(v0);
25 BUG_ON(v.counter != r);
29 BUG_ON(v.counter != r);
30 BUG_ON(atomic64_read(&v) != r);
33 atomic64_add(onestwos, &v);
35 BUG_ON(v.counter != r);
38 atomic64_add(-one, &v);
40 BUG_ON(v.counter != r);
44 BUG_ON(atomic64_add_return(onestwos, &v) != r);
45 BUG_ON(v.counter != r);
49 BUG_ON(atomic64_add_return(-one, &v) != r);
50 BUG_ON(v.counter != r);
53 atomic64_sub(onestwos, &v);
55 BUG_ON(v.counter != r);
58 atomic64_sub(-one, &v);
60 BUG_ON(v.counter != r);
64 BUG_ON(atomic64_sub_return(onestwos, &v) != r);
65 BUG_ON(v.counter != r);
69 BUG_ON(atomic64_sub_return(-one, &v) != r);
70 BUG_ON(v.counter != r);
75 BUG_ON(v.counter != r);
79 BUG_ON(atomic64_inc_return(&v) != r);
80 BUG_ON(v.counter != r);
85 BUG_ON(v.counter != r);
89 BUG_ON(atomic64_dec_return(&v) != r);
90 BUG_ON(v.counter != r);
93 BUG_ON(atomic64_xchg(&v, v1) != v0);
95 BUG_ON(v.counter != r);
98 BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
100 BUG_ON(v.counter != r);
103 BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
104 BUG_ON(v.counter != r);
107 BUG_ON(atomic64_add_unless(&v, one, v0));
108 BUG_ON(v.counter != r);
111 BUG_ON(!atomic64_add_unless(&v, one, v1));
113 BUG_ON(v.counter != r);
115 #if defined(CONFIG_X86) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(_ASM_GENERIC_ATOMIC64_H)
117 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
119 BUG_ON(v.counter != r);
122 BUG_ON(atomic64_dec_if_positive(&v) != -one);
123 BUG_ON(v.counter != r);
126 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
127 BUG_ON(v.counter != r);
129 #warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above
133 BUG_ON(!atomic64_inc_not_zero(&v));
135 BUG_ON(v.counter != r);
138 BUG_ON(atomic64_inc_not_zero(&v));
139 BUG_ON(v.counter != r);
142 BUG_ON(!atomic64_inc_not_zero(&v));
144 BUG_ON(v.counter != r);
147 printk(KERN_INFO "atomic64 test passed for %s+ platform %s CX8 and %s SSE\n",
148 #ifdef CONFIG_X86_CMPXCHG64
153 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
154 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
156 printk(KERN_INFO "atomic64 test passed\n");
162 core_initcall(test_atomic64);