[arm] Support float registers for moves and swaps.

[arm] Support float registers for moves and swaps.
Uses float registers s0-s31 for moves and swaps when rep is kFloat32.
Changes bitcast to use float registers.

LOG=N
BUG=v8:4124
Committed: https://crrev.com/9eb756fb30704606dbb477791758b017f5b5dc2b
Cr-Commit-Position: refs/heads/master@{#36791}

[bbudge, 2016-06-06 19:36:58]

bbudge@chromium.org changed reviewers:
+ bmeurer@chromium.org

[bbudge, 2016-06-07 00:32:14]

Patchset #2 (id:20001) has been deleted

[Benedikt Meurer, 2016-06-07 03:46:01]

lgtm

[bbudge, 2016-06-07 13:59:04]

The CQ bit was checked by bbudge@chromium.org

[commit-bot: I haz the power, 2016-06-07 13:59:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2039843003/40001

[commit-bot: I haz the power, 2016-06-07 14:01:27]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2016-06-07 14:04:40]

Description was changed from

==========
[arm] Support float registers for moves and swaps.
Uses float registers s0-s31 for moves and swaps when rep is kFloat32.
Changes bitcast to use float registers.

LOG=N
BUG=v8:4124
==========

to

==========
[arm] Support float registers for moves and swaps.
Uses float registers s0-s31 for moves and swaps when rep is kFloat32.
Changes bitcast to use float registers.

LOG=N
BUG=v8:4124

Committed: https://crrev.com/9eb756fb30704606dbb477791758b017f5b5dc2b
Cr-Commit-Position: refs/heads/master@{#36791}
==========

[commit-bot: I haz the power, 2016-06-07 14:04:41]

Patchset 2 (id:??) landed as
https://crrev.com/9eb756fb30704606dbb477791758b017f5b5dc2b
Cr-Commit-Position: refs/heads/master@{#36791}