[arm64] Turn off the default NaN mode on arm64.

[arm64] Turn off the default NaN mode on arm64.

The default NaN mode was originally used to identify holes in double
arrays. With (https://codereview.chromium.org/863633002/) signalling
NaNs are used for that, and the default NaN mode is not needed anymore.
Without the default NaN mode it is easier to satisfy the WebAssembly
spec which requires that quiet NaNs are preserved.

R=titzer@chromium.org, rodolph.perfetta@arm.com, bmeurer@chromium.org

Committed: https://crrev.com/2f9eb09f20058ec1111d47353f0b0a37902f6441
Cr-Commit-Position: refs/heads/master@{#35518}

[Rodolph Perfetta (ARM), 2016-04-14 15:00:39]

lgtm

[Benedikt Meurer, 2016-04-14 18:35:57]

Also nice! Also LGTM :-)

[ahaas, 2016-04-15 11:47:57]

The CQ bit was checked by ahaas@chromium.org

[commit-bot: I haz the power, 2016-04-15 11:48:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1884193002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1884193002/1

[commit-bot: I haz the power, 2016-04-15 11:50:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-15 11:52:13]

Description was changed from

==========
[arm64] Turn off the default NaN mode on arm64.

The default NaN mode was originally used to identify holes in double
arrays. With (https://codereview.chromium.org/863633002/) signalling
NaNs are used for that, and the default NaN mode is not needed anymore.
Without the default NaN mode it is easier to satisfy the WebAssembly
spec which requires that quiet NaNs are preserved.

R=titzer@chromium.org, rodolph.perfetta@arm.com, bmeurer@chromium.org
==========

to

==========
[arm64] Turn off the default NaN mode on arm64.

The default NaN mode was originally used to identify holes in double
arrays. With (https://codereview.chromium.org/863633002/) signalling
NaNs are used for that, and the default NaN mode is not needed anymore.
Without the default NaN mode it is easier to satisfy the WebAssembly
spec which requires that quiet NaNs are preserved.

R=titzer@chromium.org, rodolph.perfetta@arm.com, bmeurer@chromium.org

Committed: https://crrev.com/2f9eb09f20058ec1111d47353f0b0a37902f6441
Cr-Commit-Position: refs/heads/master@{#35518}
==========

[commit-bot: I haz the power, 2016-04-15 11:52:14]

Patchset 1 (id:??) landed as
https://crrev.com/2f9eb09f20058ec1111d47353f0b0a37902f6441
Cr-Commit-Position: refs/heads/master@{#35518}