The wholechip floorplan is very important before you start the layout.8 `9 m0 D! N4 s+ z5 s
Then the position of output pin are fixed for each sub block,and the line drawing will be smooth. * ?6 K8 y: g, E& _9 o; v& qFinally,the drc & lvs could be so easy to do .* h) o3 [9 _" ?0 a3 o! t7 L7 N9 R
But the floorplan must be verified by designer.The thing of re-layout almost have not be happened.