一种低开销运算部件余数码检错电路设计  

Design of a Low-Cost Residue Code Checking Circuit of Arithmetic Unit

作　　者：周建毅[1] 郑方[1] 李宏亮[1] 

机构地区：[1]江南计算技术研究所,无锡214000

出　　处：《高性能计算技术》2014年第5期31-35,共5页

摘　　要：由于受到软错误的影响，处理器运算部件的计算结果会出现错误。余数码检错是一种检测运算部件错误的有效方法，但由于余数码检错电路不同的实现方法以及模数的选择，错误覆盖率和面积开销会有比较大的差异。本文设计了一种低开销运算部件余数码检错方法，使余数产生模块的面积开销较小，并且对比了余数码检错电路在不同模数下的面积开销和错误覆盖率，以使整个检错电路的错误覆盖率与面积比达到最优，并最终实现了低开销加法器和乘法器的余数码检错电路，只需很小的面积开销就能对处理器的可靠性有较大的提升。Due to the influence of soft error, the arithmetic unit of processor may give wrong result. Residue code checking is an effective method for detecting the error of arithmetic unit. But the fault coverage and area cost may differ largely when the circuits are implemented in different ways. The paper designed a low area cost residue code checking circuit which has smaller residue generator, compared the fault coverage and area cost with different modulus and chose the best modulus make the fault coverage/area cost the best. And in the end, implement the residue code checking circuit for adder and multiplier to improve the reliability of processor with low cost.

关 键 词：余数码检错 运算部件 软错误 错误覆盖率 模数 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]