Test for BN case and its function

Signed-off-by: 9drashijin <9drashijin@live.com>
added more test for the BN instruction and fix some operation error

Signed-off-by: 9drashijin <9drashijin@live.com>
Added test for RETFIE should return from interrupt and set GIE to 1.
Added test for other function and error

Signed-off-by: 9drashijin <9drashijin@live.com>
pre test for TBLWT_POSTINC

Signed-off-by: 9drashijin <9drashijin@live.com>