A block may be designated for implementation in {HEAD ~ either software} or hardware regardless of whether the block is specified in a general purpose programming language or in {TAIL ~ a hardware description language} 
A block may be designated for implementation in { HEAD ~ either software } or hardware regardless of whether the block is specified in a general purpose programming language or in { TAIL ~ a hardware description language }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL