controlling data flow in each pipeline so that {TAIL ~ a majority} of {HEAD ~ the internal buses} can be time shared to save chip area, 
controlling data flow in each pipeline so that { TAIL ~ a majority } of { HEAD ~ the internal buses } can be time shared to save chip area ,
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH