正确答案: C
在出现中断的情况下可以让已经进入流水线的指令继续执行
题目:以下关于指令流水线的描述中,正确的是______。
解析:解析:假如第n+1条指令的操作数地址即为第n条指令的运算结果,那么取操作数n+l的动作需要等待几个时钟周期才能进行,否则取得的数据是错误的,这种情况称为数据相关。为了改善流水线工作情况,一般设置相关专用通路,即当发生数据相关时,第n+1条指令的操作数直接从数据处理部件得到,而不是存入后再读取。当条件转移指令进入流水线后直到确定下一指令地址之前,流水线不能继续处理后面的指令而处于等待状态,因而影响流水线效率。某些计算机中采用“猜测法”、“指令预取”和“无序执行”等技术加以改善。流水线机器处理中断的方法有“不精确断点法”和“精确断点法”两种。其中,“不精确断点法”对接收中断请求时还未进入流水线的后续指令不允许其再进入,等已在流水线中的所有指令执行完毕后再转入中断处理程序。流水线机器可以采用“运算操作流水线技术”来执行浮点加法运算等。
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举一反三的答案和解析:
[单选题]● 在进行(61)时可以采用期望货币值技术。(61)
定量风险分析
[单选题]Electronic mail, or mail, as it is known to its many fans, has been around for over two decades. Typically, email systems support five basic functions, as described below.(41)refers to the process of creating messages and answers.(42)refers to moving messages from the originator to the recipient.(43)has to do with telling the originator what happened to the message. Was it rejected? Was it lost?(44)incoming message is needed. So people can read their email.(45) is the final step and concerns what the recipient does with the message after receiving it.
Composition