--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgomp/testsuite/libgomp.c/atomic-1.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,62 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -march=pentium" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
+
+#ifdef __i386__
+#include "cpuid.h"
+#endif
+
+extern void abort (void);
+double d;
+struct
+{
+  int i;
+  double e;
+  int j;
+} x;
+
+void
+f1 (void)
+{
+  #pragma omp atomic
+    d += 7.5;
+  #pragma omp atomic
+    d *= 2.5;
+  #pragma omp atomic
+    d /= 0.25;
+}
+
+void
+f2 (void)
+{
+  #pragma omp atomic
+    x.e += 7.5;
+  #pragma omp atomic
+    x.e *= 2.5;
+  #pragma omp atomic
+    x.e /= 0.25;
+}
+
+int
+main (void)
+{
+#ifdef __i386__
+  unsigned int eax, ebx, ecx, edx;
+
+  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+    return 0;
+
+  if (!(edx & bit_CMPXCHG8B))
+    return 0;
+#endif
+
+  d = 1.0;
+  f1 ();
+  if (d != 85.0)
+    abort ();
+
+  x.e = 1.0;
+  f2 ();
+  if (x.i != 0 || x.e != 85.0 || x.j != 0)
+    abort ();
+  return 0;
+}