集成电路与嵌入式系统2025，Vol.25Issue(5)：1-7,7.DOI:10.20193/j.ices2097-4191.2024.0089
基于RISC-Ⅴ自定义指令的数学函数的高效实现
Efficient implementation of mathematical functions based on RISC-Ⅴ custom instructions
邢根 1胡志远 1毕大炜1
作者信息
- 1. 中国科学院上海微系统与信息技术研究所,上海 200050||中国科学院大学,北京 100049
- 折叠
摘要
Abstract
In industrial control algorithms,the calculation of mathematical functions typically requires a large number of clock cycles,af-fecting the performance of the algorithms.This paper conducts an in-depth analysis and comparison of related methods for calculating floating mathematical functions,and designs a piecewise table lookup polynomial fitting method based on the Remez algorithm.This method is suitable for hardware circuit implementation to calculate mathematical functions.At the same time,the corresponding hard-ware circuits are implemented in the form of RISC-Ⅴ custom instructions,closely coupled with the RISC-Ⅴ processor core.The ex-perimental results show that compared with no custom extension instructions,the processor's delay in calculating mathematical functions is reduced by 93.62％.Compared with the method of calculating mathematical functions using the CORDIC instruction set,the calcula-tion delay is reduced by 79.83％.This achievement provides new ideas and solutions for RISC-Ⅴ architecture embedded microproces-sors with low-cost,high real-time requirements.关键词
RISC-Ⅴ/软硬件协同优化/数学函数/分段多项式拟合/嵌入式系统Key words
RISC-Ⅴ/hardware-software co-optimization/mathematical functions/piecewise polynomial fitting/embedded system分类
电子信息工程引用本文复制引用
邢根,胡志远,毕大炜..基于RISC-Ⅴ自定义指令的数学函数的高效实现[J].集成电路与嵌入式系统,2025,25(5):1-7,7.
