1 /* Test __atomic routines for existence and proper execution on 4 byte
2 values with each valid memory model. */
3 /* { dg-do run } */
4 /* { dg-require-effective-target sync_int_long } */
5
6 /* Test the execution of the __atomic_compare_exchange_n builtin for an int. */
7
8 extern void abort(void);
9
10 int v = 0;
11 int expected = 0;
12 int max = ~0;
13 int desired = ~0;
14 int zero = 0;
15
16 #define STRONG 0
17 #define WEAK 1
18
19 int
main()20 main ()
21 {
22
23 if (!__atomic_compare_exchange_n (&v, &expected, max, STRONG , __ATOMIC_RELAXED, __ATOMIC_RELAXED))
24 abort ();
25 if (expected != 0)
26 abort ();
27
28 if (__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
29 abort ();
30 if (expected != max)
31 abort ();
32
33 if (!__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
34 abort ();
35 if (expected != max)
36 abort ();
37 if (v != 0)
38 abort ();
39
40 if (__atomic_compare_exchange_n (&v, &expected, desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
41 abort ();
42 if (expected != 0)
43 abort ();
44
45 if (!__atomic_compare_exchange_n (&v, &expected, desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
46 abort ();
47 if (expected != 0)
48 abort ();
49 if (v != max)
50 abort ();
51
52 /* Now test the generic version. */
53
54 v = 0;
55
56 if (!__atomic_compare_exchange (&v, &expected, &max, STRONG, __ATOMIC_RELAXED, __ATOMIC_RELAXED))
57 abort ();
58 if (expected != 0)
59 abort ();
60
61 if (__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
62 abort ();
63 if (expected != max)
64 abort ();
65
66 if (!__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
67 abort ();
68 if (expected != max)
69 abort ();
70 if (v != 0)
71 abort ();
72
73 if (__atomic_compare_exchange (&v, &expected, &desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
74 abort ();
75 if (expected != 0)
76 abort ();
77
78 if (!__atomic_compare_exchange (&v, &expected, &desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
79 abort ();
80 if (expected != 0)
81 abort ();
82 if (v != max)
83 abort ();
84
85 return 0;
86 }
87