On 1/31/14, Benjamin Thaut <code at benjamin-thaut.de> wrote: > For x86 CPUs you don't really need MemoryOrder.acq as reads are atomic > by default. Hmm, I guess we could use a version(X86) block to pick this. When you say x86, do you also imply X86_64? Where can I read about the memory reads being atomic by default?