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

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