What is the instruction flow usually?

What is the instruction flow usually?

The instruction flow usually flows from main memory to the controller.

Instructions are stored in the main memory. After being fetched from the main memory, they are sent to the controller for analysis and various operation sequences are issued. The data flow flows between the arithmetic unit and the main memory.

Related introduction

is used to control various operations such as transmission, reading and writing.

Assume it is a combinational logic controller. During the instruction fetching cycle, the content of the PC is used as the address and sent to the address register AR. The controller issues the read command READ to the memory. After a certain read time, the The binary code read out from the memory is an instruction, which flows to the instruction register IR; the flow of information involved in the entire operation is called the instruction flow.

Flynn Classification of Computer System Structure - Instruction Flow

In computer system structures, their classifications are different. There are three commonly used classification methods, which are:

1.Flynn’s classification

2.Feng’s classification

3.Handler’s classification

In the Flynn classification, M.J.Flynn proposed the following Definition:

Instruction stream - the sequence of instructions executed by the machine

Data flow - the sequence of data called by the instruction stream, including input data and intermediate results

Polyploidy —The maximum possible number of instructions or data that are simultaneously in the same stage of execution on the most constrained element of the system.

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