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Flute an Expert Floor Planner for Full-Custom VLSI Design

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1 Author(s)
Watanabe, H. ; University of North Carolina Bryan Ackland, AT&T Bell Laboratories

Flute is a heuristic floorplanner that operates as part of Cadre, a system of cooperating expert agents for converting a hierarchical structural description into full-custom VLSI layout. Flute is modeled on the human floorplanning process and uses a mixture of rule-based programming, state control, and algorithmic operators. Initially, a topological plan is generated by placing modules on a grid graph. From this plan, a constraint graph is prepared. This graph is solved to add geometric size and placement information to the floorplan. Though Flute handles a fairly small number of submodules at a time, it can construct a floorplan of complex VLSI layout using a hierarchical structure of ICs. Flute is implemented in Zeta-lisp on Symbolics Lisp machines.

Published in:

Design & Test of Computers, IEEE  (Volume:4 ,  Issue: 1 )

Date of Publication:

Feb. 1987

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