The wholechip floorplan is very important before you start the layout., ?1 L6 Z1 e; t, o2 w& d7 l
Then the position of output pin are fixed for each sub block,and the line drawing will be smooth.( E. T* Q/ o) S' u: b! g
Finally,the drc & lvs could be so easy to do . 3 z# Y" k! N9 c* X! UBut the floorplan must be verified by designer.The thing of re-layout almost have not be happened.