GCC interpretation of C11 atomics (DR 459)

[Florian Weimer]

On 02/26/2018 07:36 PM, Janne Blomqvist wrote:
> There is no such architectural guarantee. At least on some
> micro-architecture (AMD Opteron "Istanbul") it's possible to construct
> a test which fails, proving that at least on that micro-arch SSE2
> load/store isn't guaranteed to be atomic.

Looks like I was wrong.  Ugh.

Thanks,
Florian