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",
150 #elif defined(CONFIG_X86_CMPXCHG64)
155 boot_cpu_has(X86_FEATURE_CX8
) ? "with" : "without",
156 boot_cpu_has(X86_FEATURE_XMM
) ? "with" : "without");
158 printk(KERN_INFO
"atomic64 test passed\n");
164 core_initcall(test_atomic64
);
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