Decomposition of instruction decoders for low-power designs
Wu-An Kuo, TingTing Hwang, Allen C.-H. Wu · ACM Transactions on Design Automation of Electronic Systems · 2006
During the execution of processor instruction, decoding the instructions is a major task in identifying instructions and generating control signals for data paths. In this article, we propose two instruction decoder decomposition techniques for low-power designs. First, by tracing program execution sequences, we propose an algorithm that explores the relations between frequently executed instructions. Second, we propose a two-stage low-power decomposition structure for decoding instructions. Experimental results demonstrate that our proposed techniques achieve an average of 34.18% in power reduction and 12.93% in critical-path delay reduction for the instruction decoder.