--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/dfp/operator-cond.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,57 @@
+/* { dg-options "-O0" } */
+
+/* C99 6.5.15 Conditional operator.
+   Test with decimal float operands.  */
+
+#include "dfp-dbg.h"
+
+volatile _Decimal32 d32a, d32b, d32c;
+volatile _Decimal64 d64a, d64b, d64c;
+volatile _Decimal128 d128a, d128b, d128c;
+volatile int i, yes, no;
+
+void
+init ()
+{
+  d32b = 123.456e94df;
+  d64b = 12.3456789012345e383dd;
+  d128b = 12345.6789012345678901e4000dl;
+
+  d32c = 1.3df;
+  d64c = 1.2dd;
+  d128c = 1.1dl;
+
+  i = 2;
+  yes = 1;
+  no = 0;
+}
+
+int
+main ()
+{
+  init ();
+
+  /* Operands and the result are all the same decimal float type.  */
+  d32a = yes ? d32b : d32c;
+  if (d32a != d32b)
+    FAILURE
+  d64a = no ? d64b : d64c;
+  if (d64a != d64c)
+    FAILURE
+  d128a = yes ? d128b : d128c;
+  if (d128a != d128b)
+    FAILURE
+
+  /* Operand types are different.  */
+  d128a = yes ? d32b : d64b;
+  if (d128a != d32b)
+    FAILURE
+  d128a = yes ? d128b : d64b;
+  if (d128a != d128b)
+    FAILURE
+  d128a = no ? d32b : d128b;
+  if (d128a != d128b)
+    FAILURE
+
+  FINISH
+}