test_maxint, add zero onto 0xffffffffffffff

diff --git a/src/openpower/decoder/selectable_int.py b/src/openpower/decoder/selectable_int.py
index 2afe50e67d5887e81ac8bde6307aa4a34d510c88..1481f289d9958a00f6dc6e9cfb9c0bd324663c87 100644 (file)
--- a/src/openpower/decoder/selectable_int.py
+++ b/src/openpower/decoder/selectable_int.py
@@ -555,6 +555,12 @@ class SelectableIntTestCase(unittest.TestCase):
         self.assertTrue(a != b)
         self.assertFalse(a == b)
 
+    def test_maxint(self):
+        a = SelectableInt(0xffffffffffffffff, bits=64)
+        b = SelectableInt(0, bits=64)
+        result = a + b
+        self.assertTrue(result.value == 0xffffffffffffffff)
+
 
 if __name__ == "__main__":
     unittest.main()