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A Flexible Datapath Interconnect for Embedded Applications

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3 Author(s)
Sjalander, M. ; Dept. of Comput. Sci. & Eng., Chalmers Univ. of Technol., Goteborg ; Larsson-Edefors, P. ; Bjork, M.

We investigate the effects of introducing a flexible interconnect into an exposed datapath. We define an exposed datapath as a traditional GPP datapath that has its normal control removed, leading to the exposure of a wide control word. For an FFT benchmark, the introduction of a flexible interconnects reduces the total execution time by 16%. Compared to a traditional GPP, the execution time for an exposed datapath using a flexible interconnect is 32% shorter whereas the energy dissipation is 29% lower. Our investigation is based on a cycle-accurate architectural simulator and figures on delay, power, and area are obtained from placed-and-routed layouts in a commercial 0.13-mum technology. The results from our case studies indicate that by utilizing a flexible interconnect, significant performance gains can be achieved for generic applications.

Published in:

VLSI, 2007. ISVLSI '07. IEEE Computer Society Annual Symposium on

Date of Conference:

9-11 March 2007