关键词: SIMD优化 向量寄存器 部分重用 数据相关性

Abstract:

The SIMD architecture becomes one of the most popular frameworks applied to general-purpose microprocessors to boost the performance of multimedia wor   kloads. With the data-level parallelism of the SIMD architecture, the processing capability of microprocessors has been increasing dramatically. However  , the performance of applications can not keep pace because of the imperfect speed of the memory system. In this paper, based on the memory unit of the   SIMD architecture, we propose a compilation scheme to exploit the partial reuse of the vector register data, and improve memory access efficiency in SIM D optimization. According to the dependence analysis, we present a transformation strategy that generates vector codes exploiting the partial reuse of v  ector registers during the vectorization of applications. Experimental results show that our compilation technique can significantly improve the perform  ance of multimedia applications

Key words: （SIMD optimization, vector register, partial reuse, data dependence）