Call for compiler help/advice: atomic builtins for v3

[Paolo Carlini]

Richard Henderson wrote:
> On Sun, Nov 06, 2005 at 12:10:03PM -0800, Ian Lance Taylor wrote:
>   
>> How many processors out there support multi-processor systems but do
>> not provide any sort of atomic store operation?
>>     
> My point here had been more wrt the 8-byte operations, wherein
> there are *pleanty* of multi-processor systems that don't have
> an 8-byte atomic store.
>
> Although in some cases we can make use of the fpu for that.
>   
Indeed, I hope we can deal with that, at least on most 64-bit machines: 
we have got a nasty bug in the mt_allocator code (libstdc++/24469) which 
would be trivial to fix if size_t-sized atomics were generally available...

Paolo.