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