浮点到定点的高效翻译策略研究

计算机科学与探索 ›› 2011, Vol. 5 ›› Issue (5): 446-451.

浮点到定点的高效翻译策略研究

郑重, 陈顼颢, 沈立, 王志英

国防科学技术大学计算机学院, 长沙 410073

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-05-01 发布日期:2011-05-01

High-performance Floating-point to Fixed-point Translation Strategy

ZHENG Zhong, CHEN Xuhao, SHEN Li, WANG Zhiying

College of Computer Science, National University of Defense Technology, Changsha 410073, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-05-01 Published:2011-05-01

摘要/Abstract

摘要： 动态二进制翻译中, 在目标平台没有浮点部件、不支持浮点运算的情况下, 浮点指令只能通过模拟解释执行。浮点指令的解释执行造成翻译系统效率急剧下降。通过将浮点指令运算转化为定点运算, 解决了浮点指令在目标平台的翻译, 为浮点指令的翻译找到了新的途径。在动态二进制翻译系统中进行实验, 验证了翻译方法的可行性。实验显示翻译系统的性能有明显提升, 含有浮点指令的比例越高, 算法能够获得的加速比越高, 对含有25%浮点指令的程序, 该算法能达到1.55的加速比。

关键词: 动态二进制翻译, 浮点, 定点

Abstract: When doing dynamic binary translation, if no floating-point component exists in the target platform so that it does not support floating-point operations, floating-point instructions can only be interpreted through simulation. Interpretation of floating-point instruction causes a sharp translation efficiency decrease. This article addresses a method that translating floating-point operations into fixed-point operations, which gives a new way to solve floating-point instruction translation in the no-floating target platform. Implementation of this method in a dynamic binary translation system proves the feasibility of the translation algorithm. The experiment also shows significantly the improvement of performance and the higher the proportion of floating-point instruction, the higher the speedup. And the speedup is up to 1.55 when the binary code contains 25% floating-point instructions.

Key words: dynamic binary translation, floating-point, fixed-point

郑重, 陈顼颢, 沈立, 王志英 . 浮点到定点的高效翻译策略研究[J]. 计算机科学与探索, 2011, 5(5): 446-451.

ZHENG Zhong, CHEN Xuhao, SHEN Li, WANG Zhiying. High-performance Floating-point to Fixed-point Translation Strategy[J]. Journal of Frontiers of Computer Science and Technology, 2011, 5(5): 446-451.