Floorplanning is an optional methodology to help you improve performance and density of a fully, automatically placed and routed design. Floorplanning is particularly useful on structured designs and data path logic. With the Floorplanner, you see where to place logic in the floorplan for optimal results, placing data paths exactly at the desired location on the die.
With the Floorplanner, you can floorplan your design prior to or after running PAR. In an iterative design flow, you floorplan and place and route, interactively. You can modify the logic placement in the Floorplan window as often as necessary to achieve your design goals. You can save the iterations of your floorplanned design to use later as a constraints file for PAR.
