Reland "ARM64: Add NEON support"

Reland "ARM64: Add NEON support"

This reverts commit cc047635ff54ce19b12cc91978971795f670767d.
The CL was reverted due to a missing DEPS mirror.

Original issue's description:
> ARM64: Add NEON support
>
> Add assembler, disassembler and simulator support for NEON in the ARM64 backend.
>
> BUG=
>
> Review-Url: https://codereview.chromium.org/2622643005
> Cr-Commit-Position: refs/heads/master@{#44306}

BUG=

Review-Url: https://codereview.chromium.org/2812573003
Cr-Commit-Position: refs/heads/master@{#44652}
Committed: https://chromium.googlesource.com/v8/v8/+/8faf3d6f25096fb68e4fed4f772bb7052192d704

[martyn.capewell, 2017-04-10 17:04:25]

martyn.capewell@arm.com changed reviewers:
+ bbudge@chromium.org, bmeurer@chromium.org, machenbach@chromium.org

[Michael Achenbach, 2017-04-11 08:20:28]

New DEPS lgtm if comment addressed.

https://codereview.chromium.org/2812573003/diff/1/DEPS
File DEPS (right):

https://codereview.chromium.org/2812573003/diff/1/DEPS#newcode40
DEPS:40: "v8/test/cctest/traces-arm64":
Please add this to .gitignore

[martyn.capewell, 2017-04-13 14:09:36]

Benedikt, if you're happy with the rest of it, I'll try to commit again.

[Benedikt Meurer, 2017-04-13 16:45:15]

I'm happy. LGTM.

[martyn.capewell, 2017-04-13 16:46:49]

The CQ bit was checked by martyn.capewell@arm.com

[martyn.capewell, 2017-04-13 16:46:50]

The patchset sent to the CQ was uploaded after l-g-t-m from
machenbach@chromium.org
Link to the patchset: https://codereview.chromium.org/2812573003/#ps20001
(title: "Add trace directory to gitignore")

[commit-bot: I haz the power, 2017-04-13 16:46:55]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-13 17:23:16]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1492102009595070,
"parent_rev": "6e0f52e1a8d8a205e6e69274f5288b87f30f9550", "commit_rev":
"8faf3d6f25096fb68e4fed4f772bb7052192d704"}

[commit-bot: I haz the power, 2017-04-13 17:23:26]

Description was changed from

==========
Reland "ARM64: Add NEON support"

This reverts commit cc047635ff54ce19b12cc91978971795f670767d.
The CL was reverted due to a missing DEPS mirror.

Original issue's description:
> ARM64: Add NEON support
>
> Add assembler, disassembler and simulator support for NEON in the ARM64
backend.
>
> BUG=
>
> Review-Url: https://codereview.chromium.org/2622643005
> Cr-Commit-Position: refs/heads/master@{#44306}

BUG=
==========

to

==========
Reland "ARM64: Add NEON support"

This reverts commit cc047635ff54ce19b12cc91978971795f670767d.
The CL was reverted due to a missing DEPS mirror.

Original issue's description:
> ARM64: Add NEON support
>
> Add assembler, disassembler and simulator support for NEON in the ARM64
backend.
>
> BUG=
>
> Review-Url: https://codereview.chromium.org/2622643005
> Cr-Commit-Position: refs/heads/master@{#44306}

BUG=

Review-Url: https://codereview.chromium.org/2812573003
Cr-Commit-Position: refs/heads/master@{#44652}
Committed:
https://chromium.googlesource.com/v8/v8/+/8faf3d6f25096fb68e4fed4f772bb705219...
==========

[commit-bot: I haz the power, 2017-04-13 17:23:27]

Committed patchset #3 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/8faf3d6f25096fb68e4fed4f772bb705219...