Subj : Re: YALFAm (Yet Another Lock Free Approach, maybe)
To   : comp.programming.threads
From : Chris Thomasson
Date : Fri May 27 2005 08:59 pm


> "exact same memory visbility semantics they happen to have on current x86
> platforms"

acquire & release semantics ( st.rel / ld.acq ) are held for loads and 
stores to the same locations; you sometimes have to use full membars ( 
mfence, LOCK prefix ) to enforce the ordering of a "critical-sequence" of 
loads/stores to different locations on IA-32.

Subsequent operations to different locations can migrate above a st.rel 
without a membar on IA-32...

.