x87: fixed x87 stack state in TurboFan

x87: fixed x87 stack state in TurboFan

  Unstructured control flow caused by excpetion handling leads to a wrong x87 stack
  state. This patch is to reset the x87 state at the hanlder entry point.

  Thanks for help from weiliang.lin@intel.com.

BUG=

Committed: https://crrev.com/ce16b44be3448e43f916e229ad1e20a0b273f4ed
Cr-Commit-Position: refs/heads/master@{#33738}

[zhengxing.li, 2016-02-04 14:24:17]

zhengxing.li@intel.com changed reviewers:
+ chunyang.dai@intel.com, weiliang.lin@intel.com

[zhengxing.li, 2016-02-04 14:24:17]

PTAL, thanks!

[Weiliang, 2016-02-04 14:25:50]

lgtm

[zhengxing.li, 2016-02-04 14:32:33]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-02-04 14:32:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1668463006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1668463006/1

[commit-bot: I haz the power, 2016-02-04 14:57:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-04 14:57:41]

Description was changed from

==========
x87: fixed x87 stack state in TurboFan

  Unstructured control flow caused by excpetion handling leads to a wrong x87
stack
  state. This patch is to reset the x87 state at the hanlder entry point.

  Thanks for help from weiliang.lin@intel.com.

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

to

==========
x87: fixed x87 stack state in TurboFan

  Unstructured control flow caused by excpetion handling leads to a wrong x87
stack
  state. This patch is to reset the x87 state at the hanlder entry point.

  Thanks for help from weiliang.lin@intel.com.

BUG=

Committed: https://crrev.com/ce16b44be3448e43f916e229ad1e20a0b273f4ed
Cr-Commit-Position: refs/heads/master@{#33738}
==========

[commit-bot: I haz the power, 2016-02-04 14:57:42]

Patchset 1 (id:??) landed as
https://crrev.com/ce16b44be3448e43f916e229ad1e20a0b273f4ed
Cr-Commit-Position: refs/heads/master@{#33738}