MIPS: Implement Bovc and Bnvc instruction macros.

MIPS: Implement Bovc and Bnvc instruction macros.

Implement Bovc and Bnvc instruction macros in macro assembler.

The change 6f920d7d59915e970a7d09bb6596605015c3bedd revealed an issue with AddBranchOvf for mips R6.
All branching instructions other than BOVC and BNVC are handled by Branch macro, which assures
correct handling of long and short branches. As a consequence, AddBranchOvf for R6 was working correctly
only before trampoline was emitted, but the case of long branch was not handled at all. Implemented
instruction macros enable proper handling of BOVC and BNVC in cases when long branching is needed.

TEST=test/intl/general/case-mapping.js

BUG=

Committed: https://crrev.com/93809055aa7d58585d73cfa9fbf18b82340db2a1
Cr-Commit-Position: refs/heads/master@{#38513}

[Marija Antic, 2016-08-09 09:16:07]

marija.antic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, ilija.pavlovic@imgtec.com,
ivica.bogosavljevic@imgtec.com, miran.karic@imgtec.com

[Marija Antic, 2016-08-09 09:16:07]

PTAL

[Ilija.Pavlovic1, 2016-08-09 12:51:31]

ilija.pavlovic@imgtec.com changed reviewers:
+ Ilija.Pavlovic@imgtec.com

[Ilija.Pavlovic1, 2016-08-09 12:51:32]

lgtm

[Ilija.Pavlovic1, 2016-08-09 12:51:38]

lgtm

[akos.palfi.imgtec, 2016-08-09 13:32:25]

akos.palfi@imgtec.com changed reviewers:
- Ilija.Pavlovic@imgtec.com

[akos.palfi.imgtec, 2016-08-09 13:32:26]

LGTM

[Marija Antic, 2016-08-09 13:32:52]

The CQ bit was checked by marija.antic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2016-08-09 13:33:04]

Dry run: 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, 2016-08-09 14:03:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-09 14:03:26]

Dry run: This issue passed the CQ dry run.

[Marija Antic, 2016-08-09 14:04:27]

The CQ bit was checked by marija.antic@imgtec.com

[commit-bot: I haz the power, 2016-08-09 14:04:40]

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, 2016-08-09 14:06:20]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-09 14:06:21]

Failed to commit the patch.

[Marija Antic, 2016-08-10 06:02:55]

The CQ bit was checked by marija.antic@imgtec.com

[commit-bot: I haz the power, 2016-08-10 06:03:04]

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, 2016-08-10 06:06:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-10 06:07:00]

Description was changed from

==========
MIPS: Implement Bovc and Bnvc instruction macros.

Implement Bovc and Bnvc instruction macros in macro assembler.

The change 6f920d7d59915e970a7d09bb6596605015c3bedd revealed an issue with
AddBranchOvf for mips R6.
All branching instructions other than BOVC and BNVC are handled by Branch macro,
which assures
correct handling of long and short branches. As a consequence, AddBranchOvf for
R6 was working correctly
only before trampoline was emitted, but the case of long branch was not handled
at all. Implemented
instruction macros enable proper handling of BOVC and BNVC in cases when long
branching is needed.

TEST=test/intl/general/case-mapping.js

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

to

==========
MIPS: Implement Bovc and Bnvc instruction macros.

Implement Bovc and Bnvc instruction macros in macro assembler.

The change 6f920d7d59915e970a7d09bb6596605015c3bedd revealed an issue with
AddBranchOvf for mips R6.
All branching instructions other than BOVC and BNVC are handled by Branch macro,
which assures
correct handling of long and short branches. As a consequence, AddBranchOvf for
R6 was working correctly
only before trampoline was emitted, but the case of long branch was not handled
at all. Implemented
instruction macros enable proper handling of BOVC and BNVC in cases when long
branching is needed.

TEST=test/intl/general/case-mapping.js

BUG=

Committed: https://crrev.com/93809055aa7d58585d73cfa9fbf18b82340db2a1
Cr-Commit-Position: refs/heads/master@{#38513}
==========

[commit-bot: I haz the power, 2016-08-10 06:07:02]

Patchset 2 (id:??) landed as
https://crrev.com/93809055aa7d58585d73cfa9fbf18b82340db2a1
Cr-Commit-Position: refs/heads/master@{#38513}