高性能HPOR CORDIC算法及实现  

High Performance HPOR CORDIC Algorithm

作　　者：田杭沛[1] 高德远[1] 张盛兵[1] 曾宇永[2] 佘建功[2] 曾翀[3] 

机构地区：[1]西北工业大学航空微电子中心,陕西西安710072 [2]湘南学院计算机系,湖南郴州423000 [3]清华大学计算机系,北京100084

出　　处：《中国集成电路》2008年第11期61-64,共4页China lntegrated Circuit

基　　金：国家自然科学基金(动态可重构专用指令集DSP体系结构研究;No.60573101)

摘　　要：CORDIC算法在通信和图像处理等各个领域有着广泛的应用,但是浮点CORDIC由于迭代延时大且实现复杂没有得到很好的应用,本文提出了一种修正浮点CORDIC算法: 高精度顺序迭代HPOR CORDIC。该算法以接近定点的运算代价完成浮点运算迭代,运算速度和硬件实现规模与定点CORDIC相当,运算精度与浮点CORDIC相当,克服了定点CORDIC运算精度差,浮点CORDIC迭代延时大、实现复杂的问题。该算法既可用于通用微处理器的设计,也可用于高性能DSP的设计。High performance microprocessor has a serious demand for speed and error of transcendental function calculation. This paper proposes a new modified CORDIC： high precision orderly rotational CORDIC （ HPOR CORDIC ） algorithm to calculate transcendental function on general-purpose microprocessor which is based on thoroughly research for tradition CORDIC. HPOR CORDIC algorithm can calculate floating-point transcendental function as fast as fixed-point transcendental function and the implement complexity does not change. The algorithm has been used on a SOC soft core which is supported by the National Advanced Research Project.

关 键 词：微处理器设计 复杂指令集计算机 超越函数指令 浮点CORDIC 误差分析 

分 类 号：TP332[自动化与计算机技术—计算机系统结构]