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
);
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