+
−/* Test __atomic routines for existence and proper execution on 4 byte 
+
−   values with each valid memory model.  */
+
−/* { dg-do run } */
+
−/* { dg-require-effective-target sync_int_long } */
+
−
+
−/* Test the execution of the __atomic_X builtin for an int.  */
+
−
+
−extern void abort(void);
+
−
+
−int v, count, ret;
+
−
+
−int
+
−main ()
+
−{
+
−  v = 0;
+
−  count = 0;
+
−
+
−  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_RELAXED) != count)
+
−    abort ();
+
−  count++;
+
−
+
−  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_ACQUIRE) != count)
+
−    abort ();
+
−  count++;
+
−
+
−  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_RELEASE) != count)
+
−    abort ();
+
−  count++;
+
−
+
−  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_ACQ_REL) != count)
+
−    abort ();
+
−  count++;
+
−
+
−  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_SEQ_CST) != count)
+
−    abort ();
+
−  count++;
+
−
+
−  /* Now test the generic version.  */
+
−
+
−  count++;
+
−
+
−  __atomic_exchange (&v, &count, &ret, __ATOMIC_RELAXED);
+
−  if (ret != count - 1 || v != count)
+
−    abort ();
+
−  count++;
+
−
+
−  __atomic_exchange (&v, &count, &ret, __ATOMIC_ACQUIRE);
+
−  if (ret != count - 1 || v != count)
+
−    abort ();
+
−  count++;
+
−
+
−  __atomic_exchange (&v, &count, &ret, __ATOMIC_RELEASE);
+
−  if (ret != count - 1 || v != count)
+
−    abort ();
+
−  count++;
+
−
+
−  __atomic_exchange (&v, &count, &ret, __ATOMIC_ACQ_REL);
+
−  if (ret != count - 1 || v != count)
+
−    abort ();
+
−  count++;
+
−
+
−  __atomic_exchange (&v, &count, &ret, __ATOMIC_SEQ_CST);
+
−  if (ret != count - 1 || v != count)
+
−    abort ();
+
−  count++;
+
−
+
−  return 0;
+
−}