cisc 和 risc

1)復雜指令集架構(CISC) (1) Complex Instruction Set Architecture (CISC))

The basic idea behind is to make hardware complex as a single instruction will do all the operation such as loading, evaluating and storing operations just like a division command will do stuff like loading data, evaluating and storing it.

背后的基本思想是使硬件變得復雜，因為一條指令將完成所有操作(例如加載，評估和存儲操作)，就像除法命令將執行諸如加載數據，評估和存儲操作一樣。

2)精簡集指令集體系結構(RISC) (2) Reduced Set Instruction Set Architecture (RISC))

The basic idea behind this is to make hardware simpler by using an instruction set composed of very few basic steps for many operation such as loading, evaluating and storing operations just like an subtraction command will be composed of loading data, evaluating and storing.

這背后的基本思想是通過使用由很少的基本步驟組成的指令集來簡化硬件，而這些基本步驟對于許多操作(如加載，評估和存儲操作)而言，就像減法命令將由加載數據，評估和存儲構成一樣。

Both approaches basically try to increase the CPU performance.

兩種方法基本上都試圖提高CPU性能。

• CISC: The CISC approach basically tries to minimize the number of instructions per program but it leads to theincrease in the cost of number of cycles per instruction.

  CISC： CISC方法基本上是嘗試將每個程序的指令數減至最少，但它導致每個指令的循環數成本增加。

• RISC: Role of RISC is basically to reduce the cycles per instruction at the cost of the number of instructions per program.

  RISC：RISC的作用基本上是減少每個指令的周期，但以每個程序的指令數為代價。

Characteristic of RISC:

RISC的特點：

It basically consists of simple instruction which basically leads to simple instruction decoding.

它基本上由簡單的指令組成，從根本上導致簡單的指令解碼。

This Instruction basically comes undersize of one word.

該指令基本上不到一個字。

This instruction basically takes one clock cycle to get executed.

該指令基本上需要一個時鐘周期來執行。

These basically require a large number of general purpose register.

這些基本上需要大量的通用寄存器。

It comprises simple Addressing Modes.

它包含簡單的尋址模式。

Characteristic of CISC:

CISC的特點：

As the name suggests Complex instruction should have complex instruction decoding.

顧名思義，復雜指令應具有復雜指令解碼。

These Instruction sizes are greater than one-word size.

這些指令大小大于一個字的大小。

Unlike RISC, CISC can take more than one clock cycle to execute Instruction.

與RISC不同，CISC可能需要多個時鐘周期來執行指令。

Unlike RISC, in CISC we basically require Less number of general purpose register as operation get performed in memory itself.

與RISC不同，在CISC中，隨著操作在內存本身中執行，我們基本上需要較少數量的通用寄存器。

It comprises complex Addressing Modes.

它包含復雜的尋址模式。

翻譯自: https://www.includehelp.com/cso/RISC-and-CISC.aspx

cisc 和 risc

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