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Interconnect planning with local area constrained retiming [logic IC layout]

We present a framework that considers global routing, repeater insertion, and flip-flop relocation for early interconnect planning. We formulate the interconnect retiming and flip-flop placement problem as a local area constrained retiming problem and solve it as a series of weighted minimum area retiming problems. Our method for early interconnect planning can reduce and even avoid design iterations between physical planning and high level designs. Experimental results show that our method can reduce the number of area violations by an average of 84% in a single interconnect planning step.