什么是“__asm​​”和“__asm​​__”之间的区别？ [英] What is the difference between '__asm' and '__asm__'?

问题描述

我学习C语言内联汇编据我所知，__ ASM {...}之间的的唯一区别; 和 __ asm__ （...）; 是第一个使用 MOV EAX，VAR 第二个使用 MOVL％0 ，EAX %% 与：= R（VAR）在结束。另外，还有一些关于第一少很多网站。还有什么其他区别有哪些？

I am learning inline assembly in C. As far as I can tell, the only difference between __asm { ... }; and __asm__("..."); is that the first uses mov eax, var and the second uses movl %0, %%eax with :"=r" (var) at the end. Also, there are a lot less websites about the first. What other differences are there?

推荐答案

使用哪种方法取决于你的编译器。这不是标准类似于C语言。

Which one you use depends on your compiler. This isn't standard like the C language.

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