Reland "MIPS: Add float instructions and test coverage, part one"

Reland "MIPS: Add float instructions and test coverage, part one"

Implement assembler, disassembler tests for all instructions for mips32 and mips64. Additionally, add missing single precision float instructions for r2 and r6 architecture variants in assembler, simulator and disassembler with corresponding tests.

Committed: https://crrev.com/0f93a456ec8b17eeb47154842c6a888cebd53bf7
Cr-Commit-Position: refs/heads/master@{#28472}

[Djordje.Pesic, 2015-05-18 15:13:45]

djordje.pesic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com,
dusan.milosavljevic@imgtec.com, paul.lind@imgtec.com

[dusmil.imgtec, 2015-05-19 09:59:40]

lgtm.

[Djordje.Pesic, 2015-05-19 10:08:44]

The CQ bit was checked by djordje.pesic@imgtec.com

[commit-bot: I haz the power, 2015-05-19 10:08:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147493002/20001

[commit-bot: I haz the power, 2015-05-19 10:35:29]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-19 10:35:44]

Patchset 2 (id:??) landed as
https://crrev.com/0f93a456ec8b17eeb47154842c6a888cebd53bf7
Cr-Commit-Position: refs/heads/master@{#28472}