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 <linux/bug.h>
13 #include <linux/kernel.h>
14 #include <linux/atomic.h>
16 #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
17 static __init int test_atomic64(void)
19 long long v0 = 0xaaa31337c001d00dLL;
20 long long v1 = 0xdeadbeefdeafcafeLL;
21 long long v2 = 0xfaceabadf00df001LL;
22 long long onestwos = 0x1111111122222222LL;
25 atomic64_t v = ATOMIC64_INIT(v0);
27 BUG_ON(v.counter != r);
31 BUG_ON(v.counter != r);
32 BUG_ON(atomic64_read(&v) != r);
35 atomic64_add(onestwos, &v);
37 BUG_ON(v.counter != r);
40 atomic64_add(-one, &v);
42 BUG_ON(v.counter != r);
46 BUG_ON(atomic64_add_return(onestwos, &v) != r);
47 BUG_ON(v.counter != r);
51 BUG_ON(atomic64_add_return(-one, &v) != r);
52 BUG_ON(v.counter != r);
55 atomic64_sub(onestwos, &v);
57 BUG_ON(v.counter != r);
60 atomic64_sub(-one, &v);
62 BUG_ON(v.counter != r);
66 BUG_ON(atomic64_sub_return(onestwos, &v) != r);
67 BUG_ON(v.counter != r);
71 BUG_ON(atomic64_sub_return(-one, &v) != r);
72 BUG_ON(v.counter != r);
77 BUG_ON(v.counter != r);
81 BUG_ON(atomic64_inc_return(&v) != r);
82 BUG_ON(v.counter != r);
87 BUG_ON(v.counter != r);
91 BUG_ON(atomic64_dec_return(&v) != r);
92 BUG_ON(v.counter != r);
95 BUG_ON(atomic64_xchg(&v, v1) != v0);
97 BUG_ON(v.counter != r);
100 BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
102 BUG_ON(v.counter != r);
105 BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
106 BUG_ON(v.counter != r);
109 BUG_ON(atomic64_add_unless(&v, one, v0));
110 BUG_ON(v.counter != r);
113 BUG_ON(!atomic64_add_unless(&v, one, v1));
115 BUG_ON(v.counter != r);
117 #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
119 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
121 BUG_ON(v.counter != r);
124 BUG_ON(atomic64_dec_if_positive(&v) != -one);
125 BUG_ON(v.counter != r);
128 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
129 BUG_ON(v.counter != r);
131 #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
135 BUG_ON(!atomic64_inc_not_zero(&v));
137 BUG_ON(v.counter != r);
140 BUG_ON(atomic64_inc_not_zero(&v));
141 BUG_ON(v.counter != r);
144 BUG_ON(!atomic64_inc_not_zero(&v));
146 BUG_ON(v.counter != r);
149 printk(KERN_INFO "atomic64 test passed for %s platform %s CX8 and %s SSE\n",
152 #elif defined(CONFIG_X86_CMPXCHG64)
157 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
158 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
160 printk(KERN_INFO "atomic64 test passed\n");
166 core_initcall(test_atomic64);