Interconnection driven VLSI module placement based on quadratic programming and considering congestion using LFF principles

In VLSI module placement interconnection behavior becomes increasingly important. Less flexibility first (LFF) principle is derived from human accumulated experience. An interconnection driven VLSI module placement algorithm based on LFF principles is proposed in this paper. We first use quadratic programming to optimize the total wire-length of the placement and then using a deterministic recursive partition rectangle packing algorithm based on LFF principles with consideration of congestion to implement the placement in an estimated fixed die area. Experimental results show efficiency and effectiveness of the proposed method.