Instead of doing a denormalization and subtraction, {HEAD ~ the complement} of the minuend stored in {TAIL ~ B register} is formed 
stored in
Instead of doing a denormalization and subtraction , { HEAD ~ the complement } of the minuend stored in { TAIL ~ B register } is formed
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH