Low-Energy Design Using Datapath Width Optimization for Embedded Processor-Based Systems

概要

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This paper presents a novel system-level technique that minimizes the energy consumptionof embedded processor-based systems through datapath width optimization. It is based on theidea of minimizing energy consumed by redundant bits, which are unused during executionof programs by means of optimizing the datapath width of processors. To minimize theredundant bits of variables in a given application program, the effective size of each variableis determined by variable size analysis, and Valen-C language is used to preserve the precisionof computation. Analysis results of variables show that there are average 39% redundantbits in the C source program of MPEG2 video decoder. In our experiments for several realembedded applications, energy savings without performance penalty are reported and rangefrom about 10.8% to 48.3%.
一般社団法人情報処理学会の論文
2002-05-15