The wholechip floorplan is very important before you start the layout.0 k0 f T/ U E
Then the position of output pin are fixed for each sub block,and the line drawing will be smooth.# b U) X; ^$ ]
Finally,the drc & lvs could be so easy to do .7 e/ w( @7 {% F9 i/ h" t
But the floorplan must be verified by designer.The thing of re-layout almost have not be happened.