PeF: Poisson’s Equation-Based Large-Scale Fixed-Outline Floorplanning

Floorplanning is the first stage of VLSI physical design. An effective floorplanning engine definitely has a positive impact on chip design speed, quality, and performance. In this article, we present novel mathematical model to characterize nonoverlapping modules, propose flat fixed-outline algorithm based global placement approach using Poisson’s equation. The consists legalization phases. floorplanning, redefine potential energy each module for characterizing modules an analytical solution scheme, widths soft appear as variables in function can be optimized. Moreover, fast approximate computation scheme partial derivatives energy. legalization, defined horizontal vertical constraint graphs, eliminate overlaps between remained after by modifying relative positions modules. Experiments MCNC, GSRC, HB+, ami49_x benchmarks show that, our improves average wirelength at least 2% 5% small large-scale with certain whitespace, respectively, compared state-of-the-art floorplanners.