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Computing lower bounds on functional units before scheduling

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2 Author(s)
Chaudhuri, S. ; Cadence Design Syst. Inc., Chelmsford, MA, USA ; Walker, R.A.

The authors present a new polynomial-time algorithm for computing lower bounds on the number of functional units (FUs) of each type required to schedule a data flow graph in a specified number of control steps. A formal approach is presented that is guaranteed to find the tightest possible bounds that can be found by relaxing either the precedence constraints or integrality constraints on the scheduling problem. This tight, yet fairly efficient, bounding method can be used to estimate FU area, to generate resource constraints for reducing the search space, or in conjunction with exact techniques for efficient optimal design space exploration.

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Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:4 ,  Issue: 2 )