Fix 32-bit and 64-bit carry out calculation in arm64 simulator.

Fix 32-bit and 64-bit carry out calculation in arm64 simulator.
Add support for 32-bit and 64-bit addition/subtraction with carry on simarm64.
Add assembler tests.

R=zra@google.com

Committed: https://code.google.com/p/dart/source/detail?r=40989

[regis, 2014-10-07 15:22:48]

regis@google.com changed reviewers:
+ zra@google.com

[zra, 2014-10-07 16:27:50]

lgtm!

also verified on hardware.

https://codereview.chromium.org/630093004/diff/1/runtime/vm/simulator_arm64.cc
File runtime/vm/simulator_arm64.cc (right):

https://codereview.chromium.org/630093004/diff/1/runtime/vm/simulator_arm64.c...
runtime/vm/simulator_arm64.cc:954: return (result >> 31) != (result >> 32);
This is much nicer =)

[regis, 2014-10-08 07:21:31]

On 2014/10/07 16:27:50, zra wrote:
> lgtm!
> 
> also verified on hardware.
> 
> https://codereview.chromium.org/630093004/diff/1/runtime/vm/simulator_arm64.cc
> File runtime/vm/simulator_arm64.cc (right):
> 
>
https://codereview.chromium.org/630093004/diff/1/runtime/vm/simulator_arm64.c...
> runtime/vm/simulator_arm64.cc:954: return (result >> 31) != (result >> 32);
> This is much nicer =)

Thanks for verifying on hardware!

[regis, 2014-10-08 07:22:11]

Committed patchset #2 (id:20001) manually as r40989 (presubmit successful).