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111
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1 /* Test __atomic routines for existence and proper execution on 1 byte
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2 values with each valid memory model. */
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3 /* { dg-do run } */
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4 /* { dg-require-effective-target sync_char_short } */
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5
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6 /* Test the execution of the __atomic_compare_exchange_n builtin for a char. */
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7
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8 extern void abort(void);
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9
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10 char v = 0;
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11 char expected = 0;
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12 char max = ~0;
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13 char desired = ~0;
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14 char zero = 0;
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15
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16 #define STRONG 0
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17 #define WEAK 1
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18
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19 int
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20 main ()
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21 {
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22
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23 if (!__atomic_compare_exchange_n (&v, &expected, max, STRONG , __ATOMIC_RELAXED, __ATOMIC_RELAXED))
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24 abort ();
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25 if (expected != 0)
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26 abort ();
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27
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28 if (__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
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29 abort ();
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30 if (expected != max)
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31 abort ();
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32
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33 if (!__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
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34 abort ();
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35 if (expected != max)
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36 abort ();
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37 if (v != 0)
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38 abort ();
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39
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40 if (__atomic_compare_exchange_n (&v, &expected, desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
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41 abort ();
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42 if (expected != 0)
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43 abort ();
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44
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45 if (!__atomic_compare_exchange_n (&v, &expected, desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
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46 abort ();
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47 if (expected != 0)
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48 abort ();
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49 if (v != max)
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50 abort ();
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51
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52 /* Now test the generic version. */
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53
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54 v = 0;
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55
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56 if (!__atomic_compare_exchange (&v, &expected, &max, STRONG, __ATOMIC_RELAXED, __ATOMIC_RELAXED))
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57 abort ();
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58 if (expected != 0)
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59 abort ();
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60
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61 if (__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
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62 abort ();
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63 if (expected != max)
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64 abort ();
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65
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66 if (!__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
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67 abort ();
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68 if (expected != max)
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69 abort ();
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70 if (v != 0)
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71 abort ();
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72
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73 if (__atomic_compare_exchange (&v, &expected, &desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
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74 abort ();
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75 if (expected != 0)
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76 abort ();
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77
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78 if (!__atomic_compare_exchange (&v, &expected, &desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
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79 abort ();
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80 if (expected != 0)
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81 abort ();
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82 if (v != max)
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83 abort ();
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84
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85 return 0;
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86 }
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