组装：两个内存地址之间移动 [英] Assembly: MOVing between two memory addresses

问题描述

我想学assermbly（如此忍受我），我在这条线得到一个编译错误：

I'm trying to learn assermbly (so bear with me) and I'm getting a compile error on this line:

mov byte [t_last], [t_cur]

该错误是

error: invalid combination of opcode and operands

我怀疑，这个错误的原因很简单，它不可能MOV指令两个内存地址之间移动，但谷歌搜索的一个半小时，我一直没能证实这一点 - 是这样的话？

I suspect that the cause of this error is simply that its not possible for a mov instruction to move between two memory addresses, but half an hour of googling and I haven't been able to confirm this - is this the case?

此外，假设我是正确的，这意味着我需要使用一个寄存器作为中间点拷贝内存：

Also, assuming I'm right that means I need to use a register as an intermediate point for copying memory:

mov cl, [t_cur]
mov [t_last], cl

请告诉我推荐注册使用（或者我应该使用堆栈代替）？

Whats the recommended register to use (or should I use the stack instead)?

推荐答案

您的怀疑是正确的，你不能从内存移动到内存中。

Your suspicion is correct, you can't move from memory to memory.

任何通用寄存器都行。记住推寄存器，如果你不知道里面是什么，并恢复回来一次。

Any general-purpose register will do. Remember to PUSH the register if you are not sure what's inside it and to restore it back once done.

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