摘要
为了增强嵌入式 CPU处理复杂运算的能力,加入特殊指令———乘积累加指令 MAC和置换指令 PERM.MAC用于提高CPU执行数字信号处理运算的效率,PERM用于增强加密、解密的运算性能.在集成电路设计过程中,运用了硬件资源共享、完全流水线、时钟控制等技术,使得整个运算单元在不增加过多芯片面积的条件下达到高性能、低功耗的设计指标.采用这种设计,在进行信息安全、多媒体处理时可以大大提高CPU的运算效率.
Some special instructions added to enhance the capability of processing complex calculation in embedded CPU were MAC (multiply accumulate) instruction, PERM (permutation) instruction, and four transport instructions to transport data. The MAC instruction was used to improve the efficiency of CPU in doing the DSP (digital signal processing) calculations, while the PERM to enhance the performance of encryption and decryption operations. They were designed in an independent functional unit in the CPU and they share hardware resources. High performance and low power design target were achieved without much increase in the chip area. It was shown that efficiency was improved greatly during processing information security or during multimedia calculation.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第2期211-215,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"863"高技术研究发展计划资助项目(2002AA1Z1050)
