1 files changed, 62 insertions, 0 deletions
diff --git a/libatomic/testsuite/libatomic.c/atomic-exchange-1.c b/libatomic/testsuite/libatomic.c/atomic-exchange-1.c
new file mode 100644
index 00000000000..fb78cdbca54
--- /dev/null
+++ b/libatomic/testsuite/libatomic.c/atomic-exchange-1.c
@@ -0,0 +1,62 @@
+/* Test __atomic routines for existence and proper execution on 1 byte 
+   values with each valid memory model.  */
+/* { dg-do run } */
+/* { dg-require-effective-target sync_char_short } */
+
+/* Test the execution of the __atomic_exchange_n builtin for a char.  */
+
+extern void abort(void);
+
+char v, count, ret;
+
+main ()
+{
+  v = 0;
+  count = 0;
+
+  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_RELAXED) !=  count++) 
+    abort ();
+
+  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_ACQUIRE) !=  count++) 
+    abort ();
+
+  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_RELEASE) !=  count++) 
+    abort ();
+
+  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_ACQ_REL) !=  count++) 
+    abort ();
+
+  if (__atomic_exchange_n (&v, count + 1, __ATOMIC_SEQ_CST) !=  count++) 
+    abort ();
+
+  /* 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;
+}