摘要
根据IEEE754/854标准,微处理器浮点单元的异常类型繁多,产生异常的原因和处理方式也比较复杂。因此浮点单元的设计中经常面临异常难以捕获的问题。本文提出一种高精度、高指令密集度开放式异常处理方法,保证了异常检测的完备性,减少了面积和功耗,加快了指令执行速度。
According to the IEEE754/854 standard, there is a diversity of microprocessor floating-point unit exceptions, and the exception generation and processing mechanism are also complex. For these reasons the exceptions in the floating-point unit are often difficult to capture. In this paper an open exception processing mechanism with high-precision and high-instruction-density features is presented. With this mechanism, the completeness of exception checking is guaranteed, and the area-power and instruction processing speed also benefit.
出处
《中国集成电路》
2008年第8期57-60,56,共5页
China lntegrated Circuit
关键词
浮点异常
松耦合关联
异常处理
floating-point exception
loose-coupled association
exception processing
