如何在GCC C ++中编写多行内联汇编代码? [英] How to write multiline inline assembly code in GCC C++?

问题描述

这看起来不太友好:

__asm("command 1"
      "command 2"
      "command 3");

我真的必须在每行两边加上双引号吗?

Do I really have to put a doublequote around every line?

而且...由于多行字符串文字在GCC中不起作用，因此我也无法作弊.

Also... since multiline string literals do not work in GCC, I could not cheat with that either.

推荐答案

我总是在Internet上找到一些示例，该示例是该人手动插入制表符和换行符而不是\ t和\ n的示例，但是它不适用于我.不太确定您的示例是否可以编译..但这就是我的方法:

I always find some examples on Internet that the guy manually insert a tab and new-line instead of \t and \n, however it doesn't work for me. Not very sure if your example even compile.. but this is how I do:

非常丑陋的方式:

asm("xor %eax,%eax");
asm("mov $0x7c802446, %ebx");
asm("mov $500, %ax");
asm("push %eax");
asm("call *%ebx");

或者这个不太丑的人:

asm("xor %eax,%eax         \t\n\
    mov $0x7c802446, %ebx  \t\n\
    mov $1000, %ax         \t\n\
    push %eax              \t\n\
    call *%ebx             \t\n\
    ");

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