Depending on the implementation of FGU 220, {HEAD ~ some instructions} or instruction operand or result scenarios may be trapped and handled or emulated by {TAIL ~ software} 
handled by
Depending on the implementation of FGU 220 , { HEAD ~ some instructions } or instruction operand or result scenarios may be trapped and handled or emulated by { TAIL ~ software }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL