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