Appropriate registers are provided to store {HEAD ~ the numbers} which represent the subtrahend and {TAIL ~ minuend} of a subtraction operation 
represent
Appropriate registers are provided to store { HEAD ~ the numbers } which represent the subtrahend and { TAIL ~ minuend } of a subtraction operation
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH