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A preprocessor for improving channel routing hierarchical pin permutation

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3 Author(s)
Chen, C.Y.R. ; Dept. of Electr. & Comput. Eng., Syracuse Univ., NY, USA ; Hou, C.Y. ; Carlson, B.S.

In standard cell design, many cell terminals and gates are permutable, and it is important for a channel router to take advantage of this to obtain better results. An efficient hierarchical algorithm is presented to determine the proper positions of permutable gates and cell terminals such that the results of the subsequent channel routing can be significantly improved. Experimental results show that our proposed algorithm considerably reduces the number of tracks and vias, and its time complexity is linear in the number of cell terminals

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:14 ,  Issue: 7 )