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