Switching circuitry couples the execution engines to a plurality of {HEAD ~ gather engines}, which generate {TAIL ~ the packets} responsive to the gather entries 
generate
Switching circuitry couples the execution engines to a plurality of { HEAD ~ gather engines } , which generate { TAIL ~ the packets } responsive to the gather entries
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH