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浮点ALU中选择进位复合加法器的优化设计
引用本文:王桐,李立健,王东琳.浮点ALU中选择进位复合加法器的优化设计[J].微计算机应用,2007,28(3):278-281.
作者姓名:王桐  李立健  王东琳
作者单位:中国科学院自动化研究所国家专用集成电路设计工程研究中心,北京,100080
摘    要:针对浮点ALU中加减运算要求同时计算sum和sum+1的特点,综合考虑延时和面积,采用选择进位结构设计复合加法器。给出了选择进位加法器延迟时间与分组方式的关系,以及最优化分组方法,将其应用于复合加法器的设计中,并用HSPICE在0.187m CMOS工艺下的模拟结果进行验证。

关 键 词:复合加法器  选择进位  最优化分组
修稿时间:2005-04-21

Optimal Design of Carry-select Compound Adder in Floating-point ALU
WANG Tong,LI Lijian,WANG Donglin.Optimal Design of Carry-select Compound Adder in Floating-point ALU[J].Microcomputer Applications,2007,28(3):278-281.
Authors:WANG Tong  LI Lijian  WANG Donglin
Affiliation:National ASIC Design Engineering Center, Beijing, 100080 ,China
Abstract:An optimal design of Carry-select compound adder is presented.The architecture is proposed because sum and sum 1 must be computed simultaneously in floating-point ALU.The relationshi Pbetween delay time and stage size of CSA is introduced.The optimization is applied to the compound adder design and is proved by HSPICE simulation in 0.18?m CMOS process.
Keywords:compound adder  carry select  optimal stage size
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