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Slicing floorplans with range constraint

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3 Author(s)
Young, F.Y. ; Dept. of Comput. Sci., Chinese Univ. of Hong Kong, Shatin, Hong Kong ; Wong, D.F. ; Yang, H.H.

In floorplanning, it is important to allow users to specify placement constraints. Floorplanning with preplaced constraint was considered recently in Murata et al. (1997) and Young and Wong (1998). In this paper, we address a more general kind of placement constraint called range constraint in which a module must be placed within a given rectangular region in the floorplan. This is a more general formulation of the placement constraint problem and any preplaced constraint can be written as a range constraint. We extend the Wong-Liu algorithm (1986) to handle range constraint. Our main contribution is a novel shape curve computation which takes range constraint into consideration. Experimental results show that the extended floorplanner performs very well and, in particular, it out-performs the floorplanner proposed by Young and Wong (1998) when specialized to handle preplaced modules

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:19 ,  Issue: 2 )