Retro68/gcc/libatomic/testsuite/libatomic.c/atomic-compare-exchange-1.c
2014-09-21 19:33:12 +02:00

86 lines
2.0 KiB
C

/* Test __atomic routines for existence and proper execution on 1 byte
values with each valid memory model. */
/* { dg-do run } */
/* Test the execution of the __atomic_compare_exchange_n builtin for a char. */
extern void abort(void);
char v = 0;
char expected = 0;
char max = ~0;
char desired = ~0;
char zero = 0;
#define STRONG 0
#define WEAK 1
int
main ()
{
if (!__atomic_compare_exchange_n (&v, &expected, max, STRONG , __ATOMIC_RELAXED, __ATOMIC_RELAXED))
abort ();
if (expected != 0)
abort ();
if (__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
abort ();
if (expected != max)
abort ();
if (!__atomic_compare_exchange_n (&v, &expected, 0, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
abort ();
if (expected != max)
abort ();
if (v != 0)
abort ();
if (__atomic_compare_exchange_n (&v, &expected, desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
abort ();
if (expected != 0)
abort ();
if (!__atomic_compare_exchange_n (&v, &expected, desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
abort ();
if (expected != 0)
abort ();
if (v != max)
abort ();
/* Now test the generic version. */
v = 0;
if (!__atomic_compare_exchange (&v, &expected, &max, STRONG, __ATOMIC_RELAXED, __ATOMIC_RELAXED))
abort ();
if (expected != 0)
abort ();
if (__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
abort ();
if (expected != max)
abort ();
if (!__atomic_compare_exchange (&v, &expected, &zero, STRONG , __ATOMIC_RELEASE, __ATOMIC_ACQUIRE))
abort ();
if (expected != max)
abort ();
if (v != 0)
abort ();
if (__atomic_compare_exchange (&v, &expected, &desired, WEAK, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE))
abort ();
if (expected != 0)
abort ();
if (!__atomic_compare_exchange (&v, &expected, &desired, STRONG , __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
abort ();
if (expected != 0)
abort ();
if (v != max)
abort ();
return 0;
}