| 判定执行的功耗优化 |
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| 引用本文： | 王永文,张民选. 判定执行的功耗优化[J]. 国防科技大学学报, 2005, 27(1): 60-63 |
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| 作者姓名： | 王永文 张民选 |
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| 作者单位： | 国防科技大学,计算机学院,湖南,长沙,410073;国防科技大学,计算机学院,湖南,长沙,410073 |
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| 基金项目： | 国家自然科学基金资助项目(60273069，90207011) |
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| 摘 要： | 判定执行消除分支指令,有助于提高性能,但执行额外的指令会造成能量浪费。尽早作废无效的判定指令,可以减少能量消耗。针对Itanium2处理器,修改流水线功能划分,提前读取谓词的值,提出谓词相关情况下的流水线停顿方法。模拟结果表明,提前读取谓词并作废无效指令,能减少能量浪费,提高能量效率。
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| 关 键 词： | 判定执行 流水线 相关 低功耗设计 |
| 文章编号： | 1001-2486(2005)01-0060-04 |
| 收稿时间： | 2004-09-17 |
| 修稿时间： | 2004-09-17 |
Power Optimization for Predicated Execution |
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| WANG Yongwen and ZHANG Minxuan. Power Optimization for Predicated Execution[J]. Journal of National University of Defense Technology, 2005, 27(1): 60-63 |
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| Authors: | WANG Yongwen and ZHANG Minxuan |
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| Abstract: | Predicated execution improves the performance by eliminating branches but wastes energy due to extra instructions. Nullifying FALSE predicted instruction earlier can save energy. Based on the Itanium 2 microprocessor, we modify the pipeline function; advance the read of predicate and present methods to stall the pipeline on predicates dependency. Simulation results show that the advanced predicate reading and FALSE predicated instruction nullifying can reduce energy waste and improve the efficiency of energy. |
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| Keywords: | predicated execution pipeline dependency low-power design |
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