Abstract
Heterogeneous cells are cells with special functions in Field-Programmable Gate Arrays (FPGA) and gradually become an important resource of FPGA chips. The legalization algorithm is a key step in resolving the global placement results of heterogeneous cells to their actual locations. The algorithm in this paper is improved on the abacus algorithm. We use subspaces to evaluate the degree of congestion of cells and sort them, and use optional columns to filter to achieve a reasonable allocation of resources. The experimental results show that our work has less average moving and worst movement in the case of high density and complex distribution.
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