r188464 - [Mips][msa] Add support for half

[Jack Carter]

Rafael,

Because I want to do the right thing:

For new inhouse Mips llvm developers the process should be:
  * the initial inhouse review
  * post to the list for final review
  * commit by someone familiar with the code base affected
  * After 5 or so decent patches, apply for commit access

For the public review process, how long does one wait without comment before the inhouse  reviews suffice and a commit can happen? Do we just post from the inhouse reviewers our acceptance (if we agree with the post) and wait a working day?

Is there ever a period where inhouse review will suffice?

Cheers,

Jack