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High-level synthesis of low-power control-flow intensive circuits

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3 Author(s)
Khouri, K.S. ; Princeton Univ., NJ, USA ; Lakshminarayana, G. ; Jha, N.K.

In this paper, we present a comprehensive high-level synthesis system that is geared toward reducing power consumption in control-flow intensive as well as data-dominated circuits. An iterative improvement framework allows the system to search the design space by examining the interaction between the different high-level synthesis tasks. In addition to incorporating traditional high-level synthesis tasks such as scheduling, module selection and resource sharing, we introduce a new optimization that performs power-conscious structuring of multiplexer networks, which are predominant in control-flow intensive circuits. The scheduler employed is capable of loop optimizations within and across loop boundaries. We also introduce a fast power estimation technique, based on switching activity matrices, to drive the synthesis process. Experimental results for a number of control-flow intensive and data-dominated benchmarks demonstrate power reduction of up to 62% (58%) when compared to Vdd-scaled area-optimized (delay-optimized) designs. The area overheads over area-optimized designs are less than 39%, whereas the area savings over delay-optimized designs are up to 40%

Published in:

Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:18 ,  Issue: 12 )

Date of Publication:

Dec 1999

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