描述

執(zhí)行指令階段（EX，execute），具體實(shí)現(xiàn)指令的功能。CPU的不同部分被連接起來(lái)，以執(zhí)行所需的操作。
訪存取數(shù)階段（MEM，memory），根據(jù)指令需要訪問主存、讀取操作數(shù)，CPU得到操作數(shù)在主存中的地址，并從主存中讀取該操作數(shù)用于運(yùn)算。部分指令不需要訪問主存，則可以跳過該階段。
結(jié)果寫回階段（WB，write back），作為最后一個(gè)階段，結(jié)果寫回階段把執(zhí)行指令階段的運(yùn)行結(jié)果數(shù)據(jù)“寫回”到某種存儲(chǔ)形式。結(jié)果數(shù)據(jù)一般會(huì)被寫到CPU的內(nèi)部寄存器中，以便被后續(xù)的指令快速地存??；許多指令還會(huì)改變程序狀態(tài)字寄存器中標(biāo)志位的狀態(tài)，這些標(biāo)志位標(biāo)識(shí)著不同的操作結(jié)果，可被用來(lái)影響程序的動(dòng)作。
在指令執(zhí)行完畢、結(jié)果數(shù)據(jù)寫回之后，若無(wú)意外事件（如結(jié)果溢出等）發(fā)生，計(jì)算機(jī)就從程序計(jì)數(shù)器中取得下一條指令地址，開始新一輪的循環(huán)，下一個(gè)指令周期將順序取出下一條指令。 [1] 許多復(fù)雜的CPU可以一次提取多個(gè)指令、解碼，并且同時(shí)執(zhí)行。

Execute instruction stage (EX, execute), specifically implementing the function of the instruction. The different parts of the CPU are connected to perform the required operations.
In the MEM (Access Memory) stage, the CPU accesses main memory and reads operands based on instructions. The CPU obtains the address of the operand in main memory and reads the operand from main memory for computation. If some instructions do not require access to main memory, this stage can be skipped.
The result write back stage (WB, write back) is the final stage where the result data from the execution instruction stage is “written back” to some storage form. The resulting data is generally written to the internal registers of the CPU for quick access by subsequent instructions; Many instructions also change the state of the flag bits in the program status word register, which identify different operation results and can be used to affect program actions.
After the instruction is executed and the result data is written back, if there are no unexpected events (such as result overflow), the computer obtains the address of the next instruction from the program counter and starts a new cycle. The next instruction cycle will sequentially fetch the next instruction. [1] Many complex CPUs can extract multiple instructions at once, decode them, and execute them simultaneously.

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公司介紹：
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Company Introduction:
Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



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