I.两级涮(线 第一级:取指令(Instruction Fetch):从指令存储器中取出指令; 第二级:执行(EXEcute):对取出的指令译码,取操作数,运算,写回操作结果。
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...理器操作 首先,作为微处理器系统的核心部件CPU,它必须能进行如下一 些最基本的操作: (1)取指令(fetch instructions):CPU必须有办法、有能 力从存储器内读取指令。
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这让处理器可以提前准备分支操作(例如预取指令)。
This allows the processor to prepare for the branch ahead of time (prefetching the instructions, for instance).
它从存储器中取指令,提供存储器需要的地址和控制信号。
It fetches instructions from memory, supplying the address and control signals needed by memory to access its data.
每个被映射的页面都有读、写以及取指令(也叫执行)的限制。
Each mapped page is restricted in the types of operations that may be performed on its contents: read, write, and instruction fetch (also called execute).
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