多媒体处理器的SIMD代码生成

通用处理器的SIMD（Single Instruction Multiple Data）多媒体扩展，为提高多媒体应用的性能提供了新的体系结构支持。但目前编译技术对这类指令不能提供很好的支持。本文提出了一个新的SIMD指令生成算法，基于把编译器前端的程序分析和编译器后端的机器信息相结合的思想，采用扩展的treeparsing技术，有效识别程序中的并行操作以生成SIMD指令。基于SUIF（Stanford University Intermediate Format）编译器框架的实验表明，针对一组多媒体kernel，本文提出的算法可平均减少其非SIMD代码47％的cycles。

SIMD Code Generation for Multimedia Processors

The SIMD (Single Instruction Multiple Data extensions appeared in general-purpose microprocessors provide new architectural support for improving performance of multimedia applications, but current compiler techniques cannot exploit them well. Based on the idea of integrating program analysis of the compiler front-end and machine information of the back-end, this paper proposes a new algorithm for SIMD code generation, which can identifies program parallelism effectively to generate SIMD code adopting enhanced tree parsing techniques. The algorithm has been implemented in SUIF (Stanford University Intermediate Format compiler infrastructure, and experimental results for a group of multimedia kernels show that the algorithm proposed can reduce 47% cycles on average compared to non-SIMD code.