The issue circuit issues an instruction to the execution circuit, and generates a control signal responsive to whether or not {HEAD ~ the instruction} is issued to {TAIL ~ the execution circuit} 
is issued to
The issue circuit issues an instruction to the execution circuit , and generates a control signal responsive to whether or not { HEAD ~ the instruction } is issued to { TAIL ~ the execution circuit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL