| 引用本文: | 管茂林,何义,杨乾明,等.基于程序特征分析的流处理器VLIW压缩技术与解压实现.[J].国防科技大学学报,2012,34(1):138-143.[点击复制] |
| GUAN Maolin,HE Yi,YANG Qianming,et al.Program characteristics analysis-based VLIW compression and decompression on stream processor[J].Journal of National University of Defense Technology,2012,34(1):138-143[点击复制] |
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| 基于程序特征分析的流处理器VLIW压缩技术与解压实现 |
| 管茂林1, 何义2, 杨乾明1, 张春元1 |
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(1.国防科技大学 计算机学院，湖南 长沙 410073;2.北京油料研究所，北京 102300)
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| 摘要: |
| 代码体积和代码稀疏是VLIW处理器一直存在的问题。通过对一系列典型应用在流处理器上的程序特征进行分析，提出了一种新的VLIW分域压缩技术，剔除各个子域中的空操作，并设计了分布式指令存储器对压缩后的代码进行解压缩执行。实验证明，该技术能够减少MASA流处理器中近39%的片外指令访存，降低约65%的片上指令存储器空间需求；同时使得指令存储器面积和系统面积分别减少了约37%和8.9%。 |
| 关键词: 特征分析 流处理器 代码压缩 分布式指令存储器 |
| DOI： |
| 投稿日期：2011-05-22 |
| 基金项目:国家自然科学基金资助项目（61033008, 60903041）；教育部博士点基金资助项目（20104307110002） |
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| Program characteristics analysis-based VLIW compression and decompression on stream processor |
| GUAN Maolin1, HE Yi2, YANG Qianming1, ZHANG Chunyuan1 |
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(1.College of Computer, National University of Defense Technology, Changsha 410073, China;2.POL Research Institute of Beijing, Beijing 102300, China)
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| Abstract: |
| Huge code cubage and poor code density have always been a serious problem in VLIW processors. Through analyzing the code characteristics of a series of typical applications on stream processor, a novel domain-divided VLIW code compression scheme to eliminate the nop operations in each domain, and a distributed instruction memory to decompress and execute of the codes are proposed. The experiments show that this scheme can reduce nearly 39% of the off-chip instruction memory accessing and about 65% of the on-chip instruction memory space demand. Meanwhile, it can also depress the area of on-chip instruction memory and MASA stream processor by 37% and 8.9% respectively. |
| Keywords: characteristics analysis stream processor code compression distributed instruction memory |
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