Index: src/tests/.expect/64/gmp.txt
===================================================================
--- src/tests/.expect/64/gmp.txt	(revision b0dfbc4daacd2870c209f52e5219f7fd651b3024)
+++ src/tests/.expect/64/gmp.txt	(revision 3f8dd01362faf0f98d59ad95a39521b5ccefbad9)
@@ -5,4 +5,7 @@
 y:97
 y:12345678901234567890123456789
+y:200
+y:-400
+y:24691357802469135780246913578
 y:3
 y:-3
Index: src/tests/gmp.c
===================================================================
--- src/tests/gmp.c	(revision b0dfbc4daacd2870c209f52e5219f7fd651b3024)
+++ src/tests/gmp.c	(revision 3f8dd01362faf0f98d59ad95a39521b5ccefbad9)
@@ -10,6 +10,6 @@
 // Created On       : Tue Apr 19 08:55:51 2016
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Fri Aug 25 12:50:01 2017
-// Update Count     : 544
+// Last Modified On : Mon Sep  4 09:51:18 2017
+// Update Count     : 550
 // 
 
@@ -29,4 +29,10 @@
 	sout | "y:" | y | endl;
 	y = "12345678901234567890123456789";
+	sout | "y:" | y | endl;
+	y = 100`mp + 100`mp;
+	sout | "y:" | y | endl;
+	y = -200u`mp + -200u`mp;
+	sout | "y:" | y | endl;
+	y = "12345678901234567890123456789"`mp + "12345678901234567890123456789"`mp;
 	sout | "y:" | y | endl;
 	y = si;