A portion of the clock tree supplies a plurality of clocks to {HEAD ~ the execution circuit}, including at least a first clock clocking the first subcircuit and at least a second clock clocking {TAIL ~ the second subcircuit} 
A portion of the clock tree supplies a plurality of clocks to { HEAD ~ the execution circuit } , including at least a first clock clocking the first subcircuit and at least a second clock clocking { TAIL ~ the second subcircuit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD 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 TAIL