Add 128-bit testing

Author: mborland

test/test_upward_rounding.cpp

@@ -119,5 +119,23 @@ int main()
     test_add<decimal_fast32_t>("+1e+0", "+1e-20", "1.000001");
     test_add<decimal_fast32_t>("+1e-1", "+1e-20", "0.10000001");
 
+    test_add<decimal128_t>("-1e+2", "+1e-383", "-99.99999999999999999999999999999999");
+    test_add<decimal128_t>("-1e+1", "+1e-383", "-9.999999999999999999999999999999999");
+    test_add<decimal128_t>("-1e+0", "+1e-383", "-0.9999999999999999999999999999999999");
+
+    test_add<decimal128_t>("+1e+2", "+1e-383", "100.00000000000000000000000000000001");
+    test_add<decimal128_t>("+1e+1", "+1e-383", "10.000000000000000000000000000000001");
+    test_add<decimal128_t>("+1e+0", "+1e-383", "1.0000000000000000000000000000000001");
+    test_add<decimal128_t>("+1e-1", "+1e-383", "0.10000000000000000000000000000000001");
+
+    test_add<decimal_fast128_t>("-1e+2", "+1e-383", "-99.99999999999999999999999999999999");
+    test_add<decimal_fast128_t>("-1e+1", "+1e-383", "-9.999999999999999999999999999999999");
+    test_add<decimal_fast128_t>("-1e+0", "+1e-383", "-0.9999999999999999999999999999999999");
+
+    test_add<decimal_fast128_t>("+1e+2", "+1e-383", "100.00000000000000000000000000000001");
+    test_add<decimal_fast128_t>("+1e+1", "+1e-383", "10.000000000000000000000000000000001");
+    test_add<decimal_fast128_t>("+1e+0", "+1e-383", "1.0000000000000000000000000000000001");
+    test_add<decimal_fast128_t>("+1e-1", "+1e-383", "0.10000000000000000000000000000000001");
+
     return boost::report_errors();
 }