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