Hello, I'm trying to figure out how to make use of CMPXCHG16B. The GCC manual looks to point towards __sync_val_compare_and_swap() with __int128 data types and the -mcx16 compile flag. But this data type is not present when I try to compile with it, nor do I think my 4th generation Opteron is capable of holding __int128 values in its registers. So what's the equivalent of .Net's _InterlockedCompareExchange128() [http://msdn.microsoft.com/en-us/library/bb514094.aspx] in GCC-land? I'm trying to avoid having to (re?)implement it myself as these folks did: http://stackoverflow.com/questions/4825400/cmpxchg16b-correct Thanks for any guidance, --Borg Onion
