Reland "MIPS64: Fix lithium arithmetic operations for integers to sign-extend result."

Reland "MIPS64: Fix lithium arithmetic operations for integers to sign-extend result."

TEST==mjsunit/asm/double-lo
BUG=

Committed: https://crrev.com/14151c81a26502fb50ba096fb7cdac9c0d7a201b
Cr-Commit-Position: refs/heads/master@{#29078}

[dusmil.imgtec, 2015-06-12 14:11:53]

dusan.milosavljevic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, jkummerow@chromium.org,
paul.lind@imgtec.com, yangguo@chromium.org

[dusmil.imgtec, 2015-06-12 14:11:53]

PTAL.

[paul.l..., 2015-06-15 16:45:43]

LGTM. You need to rebase after 9af578a7 (macro-assembler-mips64 changes).

[dusmil.imgtec, 2015-06-17 10:35:40]

The CQ bit was checked by dusan.milosavljevic@imgtec.com

[dusmil.imgtec, 2015-06-17 10:35:40]

The patchset sent to the CQ was uploaded after l-g-t-m from paul.lind@imgtec.com
Link to the patchset: https://codereview.chromium.org/1170923004/#ps90007
(title: "Include fix of removed EmitLoadRegister unsafe usage.")

[commit-bot: I haz the power, 2015-06-17 10:35:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1170923004/90007

[commit-bot: I haz the power, 2015-06-17 10:58:52]

Committed patchset #6 (id:90007)

[commit-bot: I haz the power, 2015-06-17 10:59:02]

Patchset 6 (id:??) landed as
https://crrev.com/14151c81a26502fb50ba096fb7cdac9c0d7a201b
Cr-Commit-Position: refs/heads/master@{#29078}