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《Journal of Zhejiang University(Engineering Science)》 2010-01
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Optimization of data forwarding based on early write-back strategy

CAI Wei-guang,YAO Qing-dong,LIU Peng,ZHANG Qi,ZHANG Yi-xiong(Department of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027,China)  
For deep pipeline and complex instruction set architecture,a data forwarding model based on operand access order was introduced,which utilized five parameters to describe the instruction execution process.Employing this model,a processor prototype MediaDSP64 of RISC/DSP architecture was analyzed,and a data forwarding optimization method based on distributed bypassing unit was introduced.The number of data forwarding source was reduced without instruction execution efficiency degradation,by earlier writing back the result of auxiliary register in DSP instructions.For the out of order execution caused by this method,a shadow register structure was designed to deal with precise exception handling.Experimental results showed that the hardware resource of data forwarding circuit was reduced by 43.8%,and the timing delay of critical path was reduced by 19.8%.
【Fund】: 国家自然科学基金资助项目(60873112);; 国家“863”高技术研究发展计划资助项目(2009AA01Z109)
【CateGory Index】: TP332
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 Yu Guojun Liu Peng Yao Qingdong(Department of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027);Design of Bypassing Mechanism of RISC?DSP Processor[J];Journal of Computer-Aided Design & Computer Graphics;2006-07
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 Cai Wei-guang Yao Qing-dong Liu Peng (Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China);Early Detection of Instruction Data Dependence for RISC-DSP Processor[J];Journal of Electronics & Information Technology;2010-12
2 Yu Guojun Liu Peng Yao Qingdong(Department of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027);Design of Bypassing Mechanism of RISC?DSP Processor[J];Journal of Computer-Aided Design & Computer Graphics;2006-07
【Co-references】
Chinese Journal Full-text Database 4 Hits
1 Wang Lin Yin Fu-liang Chen Zhe (School of Electronic and Information Engineering, Dalian University of Technology, Dalian 116023, China);An Octonary Huffman Decoding Method and Its Application to MPEG-4[J];Journal of Electronics & Information Technology;2008-08
2 Cai Wei-guang Yao Qing-dong Liu Peng (Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China);Early Detection of Instruction Data Dependence for RISC-DSP Processor[J];Journal of Electronics & Information Technology;2010-12
3 Hu Weiwu, Zhang Fuxin, and Li Zusong (Key Laboratory of Computer System and Architecture, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080);Design and Performance Analysis of the Godson-2 Processor[J];Journal of Computer Research and Development;2006-06
4 Yu Guojun Liu Peng Yao Qingdong(Department of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027);Design of Bypassing Mechanism of RISC?DSP Processor[J];Journal of Computer-Aided Design & Computer Graphics;2006-07
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