What does instruction circulation often refer to?
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What is instruction circulation often?
Instruction flow is often from the main memory to the controller.
The instructions are stored in the main memory, and the instructions are taken out from the main memory and sent to the controller for analysis and send out various operation sequences. The data flow flows between the arithmetic unit and the main memory.
Related brief introduction
Used to control transmission, read and write and other operations.
Suppose it is a combinational logic controller, in the instruction cycle, the contents of PC are sent into the address register AR, and the controller issues a read command READ to memory. After a certain readout time, the binary code read out from memory is an instruction, which flows to the information flow involved in the whole operation of instruction register IR;, which is called instruction flow.
Flynn Classification of computer system Architecture-instruction flow
In the computer system structure, their classification is different, among which there are three commonly used classification methods, they are:
1.Flynn classification
two。 Feng's classification
3.Handler classification
In the Flynn taxonomy, M.J.Flynn proposes the following definitions:
Instruction stream-- the sequence of instructions executed by the machine
Data flow-A sequence of data called by an instruction stream, including input data and intermediate results
Polyploidy-the maximum number of instructions or data that are in the same execution phase at the same time on the most restricted components of the system.
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