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A VLIW processor with reconfigurable instruction set for embedded applications

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6 Author(s)
Lodi, A. ; Adv. Res. Center for Electron. Syst., Univ. of Bologna, Italy ; Toma, M. ; Campi, F. ; Cappelli, A.
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This paper describes a new architecture for embedded reconfigurable computing, based on a very-long instruction word (VLIW) processor enhanced with an additional run-time configurable datapath. The reconfigurable unit is tightly coupled with the processor, featuring an application-specific instruction-set extension. Mapping computation intensive algorithmic portions on the reconfigurable unit allows a more efficient elaboration, thus leading to an improvement in both timing performance and power consumption. A test chip has been implemented in a standard 0.18-μm CMOS technology. The test of a signal processing algorithmic benchmark showed speedups ranging from 4.3× to 13.5× and energy consumption reduced up to 92%.

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Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 11 )