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An effective buffer planning algorithm for IP based fixed-outline SOC placement by Ou He; Sheqin Dong; Jinian Bian; Yuchun Ma; Xianlong Hong is a scholarly article available to read on EtoBox.

What is An effective buffer planning algorithm for IP based fixed-outline SOC placement about?

More and more IP cores are used in modern SOC designing. In order to place IP cores effectively, hierarchical design has been introduced and better supported by fixed-outline floorplanning than outline-free . In this paper, we also consider buffer insertion issue in fixed-outline floorplanning with the help of the Less Flexibility First (LFF) algorithm, which runs in a fixed-outline area and places IP cores as hard modules one after another with no backtracks. Unlike Simulated Annealing (SA), LFF is a deterministic packing algorithm and runs without topological representations. Therefore, it is able to tell the difference among geometric floorplans with the same topological structure, which is helpful to get a better result for buffer planning since buffer insertions are quite sensitive to a geometric change. Moreover, a 2-staged packing and a post greedy method after packing are also introduced based on a net-classing strategy and finally help to achieve great success rate improvement of buffer insertion (about +40.7% in 0.18μm and +37.1% in 0.07μm). Meanwhile, our buffer planning method runs much faster than SA, since it is deterministic and has no backtracks. Besides, it is also

Author

Ou He; Sheqin Dong; Jinian Bian; Yuchun Ma; Xianlong Hong

Publisher

ACM

Published

2007

Language

EN