What is the difference between 'asm', '__asm' and '__asm__'?

Question

As far as I can tell, the only difference between __asm { ... }; and __asm__(\"...\"); is that the first uses mov eax, var and the sec

Answer 1

With gcc compiler, it's not a big difference. asm or __asm or __asm__ are same, they just use to avoid conflict namespace purpose (there's user defined function that name asm, etc.)