关键词: 动态二进制翻译,系统虚拟机,软件透明移植,申威处理器

Abstract: The paper introduced a decoding-directed lightweight optimization technique for dynamic binary translation.In decoding phase,it extracts high-level semantics from source instructions,attaches appropriate annotations to them according to the context,and in translation phase,it emits optimized local instruction directly using the annotation information.The technique may identify most block-level optimization opportunities of dynamic binary translation system,and remove redundancies generated by load/store,precise exception supporting and flags handling.Evaluation demonstrates that taking QEMU for reference,the translation overhead of cross-platform x86 system virtual machine ARCH-BRIDGE using above technique gets a decrease of 53%,while the translation block size decreases by 78%,and the load/store operation number deceases by 50% and 21% respectively.

Key words: Dynamic binary translation,System VM,Software transparent porting,SW processor