'asm'，'__asm'和'__asm__'之间有什么区别？ [英] What is the difference between 'asm', '__asm' and '__asm__'?

问题描述

据我所知， __ asm {...}; 和 __ asm __（...）; 是第一个使用 mov eax，var ，第二个使用 movl％0，%% eax 与：= r（var）结尾。还有什么其他差异？关于 asm ？

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. What other differences are there? And what about just asm?

推荐答案

你的编译器。这不像C语言那样标准。

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

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