ARM64: Fix the atomic type width in the 64bit Acquire_Load().

ARM64: Fix the atomic type width in the 64bit Acquire_Load().

R=ulan@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=20486

[ulan, 2014-04-03 13:19:45]

lgtm

[Alexandre Rames, 2014-04-03 14:28:47]

Committed patchset #1 manually as r20486 (presubmit successful).

[rmcilroy, 2014-04-17 12:33:56]

On 2014/04/03 14:28:47, Alexandre Rames wrote:
> Committed patchset #1 manually as r20486 (presubmit successful).

Could you let me know if you fix any bugs in atomicops_internals_arm64_gcc.h in
the future so that I can include the fix in Chrome's base/ implementation.  I
just spent quite a while debugging a crash in Chrome which turned out to be due
to this bug, but I didn't know you'd already fixed in V8.

[ulan, 2014-04-17 12:38:34]

On 2014/04/17 12:33:56, rmcilroy wrote:
> On 2014/04/03 14:28:47, Alexandre Rames wrote:
> > Committed patchset #1 manually as r20486 (presubmit successful).
> 
> Could you let me know if you fix any bugs in atomicops_internals_arm64_gcc.h
in
> the future so that I can include the fix in Chrome's base/ implementation.  I
> just spent quite a while debugging a crash in Chrome which turned out to be
due
> to this bug, but I didn't know you'd already fixed in V8.

Sorry, Ross. I didn't think about upstreaming the fix. I will keep this in mind
if I see fixes to atomicops_internals.

[Alexandre Rames, 2014-04-17 13:08:21]

On 2014/04/17 12:33:56, rmcilroy wrote:
> On 2014/04/03 14:28:47, Alexandre Rames wrote:
> > Committed patchset #1 manually as r20486 (presubmit successful).
> 
> Could you let me know if you fix any bugs in atomicops_internals_arm64_gcc.h
in
> the future so that I can include the fix in Chrome's base/ implementation.  I
> just spent quite a while debugging a crash in Chrome which turned out to be
due
> to this bug, but I didn't know you'd already fixed in V8.

Ouch. Sorry about that. I will keep it in mind.