A processor may include {TAIL ~ an execution circuit}, {HEAD ~ an issue circuit} coupled to the execution circuit, and a clock tree for clocking circuitry in the processor 
A processor may include { TAIL ~ an execution circuit } , { HEAD ~ an issue circuit } coupled to the execution circuit , and a clock tree for clocking circuitry in the processor
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH