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.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/init.h>
15 #include <linux/bug.h>
16 #include <linux/kernel.h>
17 #include <linux/atomic.h>
19 #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
20 static __init int test_atomic64(void)
22 long long v0 = 0xaaa31337c001d00dLL;
23 long long v1 = 0xdeadbeefdeafcafeLL;
24 long long v2 = 0xfaceabadf00df001LL;
25 long long onestwos = 0x1111111122222222LL;
28 atomic64_t v = ATOMIC64_INIT(v0);
30 BUG_ON(v.counter != r);
34 BUG_ON(v.counter != r);
35 BUG_ON(atomic64_read(&v) != r);
38 atomic64_add(onestwos, &v);
40 BUG_ON(v.counter != r);
43 atomic64_add(-one, &v);
45 BUG_ON(v.counter != r);
49 BUG_ON(atomic64_add_return(onestwos, &v) != r);
50 BUG_ON(v.counter != r);
54 BUG_ON(atomic64_add_return(-one, &v) != r);
55 BUG_ON(v.counter != r);
58 atomic64_sub(onestwos, &v);
60 BUG_ON(v.counter != r);
63 atomic64_sub(-one, &v);
65 BUG_ON(v.counter != r);
69 BUG_ON(atomic64_sub_return(onestwos, &v) != r);
70 BUG_ON(v.counter != r);
74 BUG_ON(atomic64_sub_return(-one, &v) != r);
75 BUG_ON(v.counter != r);
80 BUG_ON(v.counter != r);
84 BUG_ON(atomic64_inc_return(&v) != r);
85 BUG_ON(v.counter != r);
90 BUG_ON(v.counter != r);
94 BUG_ON(atomic64_dec_return(&v) != r);
95 BUG_ON(v.counter != r);
98 BUG_ON(atomic64_xchg(&v, v1) != v0);
100 BUG_ON(v.counter != r);
103 BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
105 BUG_ON(v.counter != r);
108 BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
109 BUG_ON(v.counter != r);
112 BUG_ON(atomic64_add_unless(&v, one, v0));
113 BUG_ON(v.counter != r);
116 BUG_ON(!atomic64_add_unless(&v, one, v1));
118 BUG_ON(v.counter != r);
120 #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
122 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
124 BUG_ON(v.counter != r);
127 BUG_ON(atomic64_dec_if_positive(&v) != -one);
128 BUG_ON(v.counter != r);
131 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
132 BUG_ON(v.counter != r);
134 #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
138 BUG_ON(!atomic64_inc_not_zero(&v));
140 BUG_ON(v.counter != r);
143 BUG_ON(atomic64_inc_not_zero(&v));
144 BUG_ON(v.counter != r);
147 BUG_ON(!atomic64_inc_not_zero(&v));
149 BUG_ON(v.counter != r);
152 pr_info("passed for %s platform %s CX8 and %s SSE\n",
155 #elif defined(CONFIG_X86_CMPXCHG64)
160 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
161 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
169 core_initcall(test_atomic64);