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