在两个内存地址之间移动 [英] MOVing between two memory addresses

问题描述

我正在尝试学习汇编语言(所以请多多包涵)，并且在此行上出现编译错误:

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

mov byte [t_last], [t_cur]

错误是

error: invalid combination of opcode and operands

我怀疑导致此错误的原因仅仅是mov指令无法在两个内存地址之间移动，而是半小时的谷歌搜索，而我却无法确认这一点-是这种情况吗?

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，假设我是对的，这意味着我需要使用寄存器作为复制内存的中间点:

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

推荐使用什么寄存器(或者我应该使用堆栈)?

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，您不能从一个内存转移到另一个内存.

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

任何通用寄存器都可以.如果不确定寄存器中的内容，请记住按一下寄存器，并在完成后将其恢复.

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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