s390: Fix logic to check for overflow

s390: Fix logic to check for overflow

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2722603003
Cr-Commit-Position: refs/heads/master@{#43464}
Committed: https://chromium.googlesource.com/v8/v8/+/ef2a9e2debc8b8888348a4231d155e7ddcc86bda

[JaideepBajwa, 2017-02-27 22:26:17]

ptal

[john.yan, 2017-02-27 22:27:35]

lgtm

[JaideepBajwa, 2017-02-27 22:27:47]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2017-02-27 22:27:57]

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, 2017-02-27 23:16:48]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1488234467263100,
"parent_rev": "2362f869a4675c10890397ab5d9694b4ac13f009", "commit_rev":
"ef2a9e2debc8b8888348a4231d155e7ddcc86bda"}

[commit-bot: I haz the power, 2017-02-27 23:16:53]

Description was changed from

==========
s390: Fix logic to check for overflow

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N
==========

to

==========
s390: Fix logic to check for overflow

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2722603003
Cr-Commit-Position: refs/heads/master@{#43464}
Committed:
https://chromium.googlesource.com/v8/v8/+/ef2a9e2debc8b8888348a4231d155e7ddcc...
==========

[commit-bot: I haz the power, 2017-02-27 23:16:54]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/ef2a9e2debc8b8888348a4231d155e7ddcc...