什么是“bank'ing寄存器是什么意思？ [英] What does 'bank'ing a register mean?

问题描述

在维基百科上阅读ARM体系结构，发现下面的语句：

  

寄存器R0-R7可在所有CPU模式是相同的;他们是永远不会
  存入银行。

  
  

R13和R14跨除了系统所有特权的CPU模式编组
  模式。

什么是银行一个寄存器是什么意思？

解决方案

  

注册银行指的是在同一个地址提供一个寄存器的多个副本。

从手臂的文档

的术语是指对，并不是所有的寄存器可以一次看到的问题的解决方案。

  

有每个处理器模式都有一个不同的寄存器组。编组的寄存器给快速上下文切换处理处理器异常和特权操作。

如果您寻找一个更加理论推理，我建议这纸。结果
编辑：一个比我更深给出答复<一个href=\"http://electronics.stackexchange.com/questions/102742/what-does-banking-mean-when-applied-to-registers/102743#102743\">here

Reading 'ARM Architecture' on Wikipedia and found the following statement:

Registers R0-R7 are the same across all CPU modes; they are never banked.

R13 and R14 are banked across all privileged CPU modes except system mode.

What does banking a register mean?

解决方案

Register banking refers to providing multiple copies of a register at the same address.

Taken from section 1.4.6 of the arm docs

The term is referring to a solution for the problem that not all registers can be seen at once.

There is a different register bank for each processor mode. The banked registers give rapid context switching for dealing with processor exceptions and privileged operations.

If your looking for a more theoretical reasoning, I recommend this paper.
Edit: A much deeper answer than mine is given here

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