atomic_64 operations

[Julian Elischer]

I don't remember, but if it's here we probably need to have it on all 
architectures..
The 64 bit archs would be ok I guess.. don't know about ARM etc.


Petri Helenius wrote:

>
> I found a patch dating back to 2002 implementing atomic 64 bit 
> arithmetic on i386. Is there a reason why that got never committed?
>
> (this is related to my quest reducing mutexes, having 64bit add would 
> reduce the requirement nicely)
>
> Pete
>
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