数据路径之间的差异

先决条件 – ALU 和数据路径
在本节中，我们将讨论数据路径之间的区别。这些数据路径是：

1. 单周期
2. 多循环
3. 管道

在单周期时钟周期时间对于指令来说足够长，而在多周期和流水线时钟周期时间对于指令来说足够短。

现在，它们之间的区别如下：

Single Cycle	Multiple Cycle	Pipeline
Single Cycle has one CPI (clock cycle per instruction).	Multiple cycle have variable number of CPI (Clock Cycle Per Instruction).	In pipeline, there is fixed number of CPI (Clock Cycle Per Instruction).
Single cycle have no instructions subdivided.	Multiple cycle have arbitrary number of instructions subdivided.	pipeline also have instructions subdivided one step per pipeline stage.
In Single cycle, there is executed one instruction at the same time.	In Multiple cycle, there is also executed one instruction at same time.	But in pipeline, many instructions are executed at the same time.
Extra registers are not used in single cycle.	But in multiple cycle, extra registers are used.	Extra registers are also used in pipeline.
In single cycle, clock cycle time is long.	In multiple cycle, clock cycle time is short.	In pipeline, clock cycle time is also short.
There is no overlapping in single cycle.	In multiple cycle, there is also no overlapping.	In pipeline, there is overlap instruction execution.