test_wrbase
test_wrbase(0, 0);
test_wrbase(0, 1);
test_wrbase(0, 0x200000000);
test_wrbase(0, 0xffffffffffffffff);
test_wrbase(ss, 0);
test_wrbase(ss, 1);
test_wrbase(ss, 0x200000000);
test_wrbase(ss, 0xffffffffffffffff);