[PATCH] [mips] Add itineraries for ext and ins instructions.

[Daniel Sanders]

LGTM.

> My question is if this is the right way because there are several styles used.

>  There are:

> 

> - General itineraries like IIAlu

> - Itineraries for individual instructions: II_ADDI, II_ADDI, II_ADDU

> - Itineraries for an instruction's family: II_C_CC_D


We were phasing out the general itineraries since they didn't map very well to the P5600. I'd nearly finished this migration at the point I was interrupted by more pressing correctness issues and new instruction sets like MIPS32r6. I should be getting back to the P5600 scheduler soon. The individual II_*'s are preferred but there's a couple groups (like II_C_CC_D) where it was difficult and unnecessary to be more precise.


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http://reviews.llvm.org/D7209

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