One GNU ASM syntax problem

[kai ouyang]

Hi,everybody,

I have one question about GNU ASM syntax. As I know:
__asm __volatile(
"instructions"
:output
:input
:exception);
In Linux, the restriction of output are "=m","=a", etc.
But I found in FreeBSD, there are "=m" and "+m".
I do not know the difference between "+" and "=". why?
Thank you!

Best Regards
Ouyang Kai




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