diff --git a/cppu/test/language_binding.idl b/cppu/test/language_binding.idl
index 8d3deef3834b..17d108128de7 100644
--- a/cppu/test/language_binding.idl
+++ b/cppu/test/language_binding.idl
@@ -4,9 +4,9 @@
  *
  *  $RCSfile: language_binding.idl,v $
  *
- *  $Revision: 1.3 $
+ *  $Revision: 1.4 $
  *
- *  last change: $Author: rt $ $Date: 2005-09-08 08:55:54 $
+ *  last change: $Author: obo $ $Date: 2008-02-27 10:05:40 $
  *
  *  The Contents of this file are made available subject to
  *  the terms of GNU Lesser General Public License Version 2.1.
@@ -70,6 +70,49 @@ struct TestSimple
     double                     Double;
     test::TestEnum             Enum;
 };
+/**
+ * equal to max size returned in registers on x86_64
+ */
+struct SmallStruct
+{
+    hyper                      a;
+    hyper                      b;
+};
+/**
+ * equal to max size returned in registers on ia64
+ */
+struct MediumStruct
+{
+    hyper                      a;
+    hyper                      b;
+    hyper                      c;
+    hyper                      d;
+};
+/**
+ * bigger than max size returned in registers on ia64
+ */
+struct BigStruct
+{
+    hyper                      a;
+    hyper                      b;
+    hyper                      c;
+    hyper                      d;
+    hyper                      e;
+    hyper                      f;
+    hyper                      g;
+    hyper                      h;
+};
+/**
+ * all floats, ia64 claims to handle them specially
+ */
+struct AllFloats
+{
+    float                      a;
+    float                      b;
+    float                      c;
+    float                      d;
+};
+
 /**
  * complex c++ types
  */
@@ -131,6 +174,26 @@ interface XLBTestBase : com::sun::star::uno::XInterface
                               [out] sequence<test::TestElement > aSequence,
                               [out] test::TestData aStruct );
 
+    /**
+     * register return test 1
+     */
+    test::SmallStruct echoSmallStruct( [in] test::SmallStruct aStruct );
+
+    /**
+     * register return test 2
+     */
+    test::MediumStruct echoMediumStruct( [in] test::MediumStruct aStruct );
+
+    /**
+     * register return test 3
+     */
+    test::BigStruct echoBigStruct( [in] test::BigStruct aStruct );
+
+    /**
+     * register return test 4
+     */
+    test::AllFloats echoAllFloats( [in] test::AllFloats aStruct );
+
     [attribute] boolean                  Bool;
     [attribute] byte                     Byte;
     [attribute] char                     Char;