{TAIL ~ Vector adder} 80 performs {HEAD ~ integer and floating point add or subtract operations} on two 64 bit words supplied from the vector register file 35 via RD PORT3 and RD PORT4 
{ TAIL ~ Vector adder } 80 performs { HEAD ~ integer and floating point add or subtract operations } on two 64 bit words supplied from the vector register file 35 via RD PORT3 and RD PORT4
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD 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