an adaptive timing-driven layout for high speed vlsi
An adaptive timing-driven layout system, called JUNE, has been developed. The constructive algorithm, which combines placement with the global routing, constructs a placement satisfying timing and routability constraints. The placement problem for each macro is solved hierarchically as a sequence of two optimization problems followed by an adaptive correction procedure. Experimental results for industrial sea-of-gates chips confirmed effectiveness of this approach.
adapt layout systems algorithm placement global routing timing constraint macros sequence optimality correctness experimentation industrial effect