[PATCH] [mips][microMIPSr6] Implement initial mapping support

[Daniel Sanders]

I'm not very familiar with the mapping portion of microMIPS at the moment so I don't feel able to review this yet. All I know is that 'MM' does some magic that maps MIPS32r2 instructions to microMIPS instructions. Is there someone who is better able to review this? If not, I'll look into it and learn how this works.


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Comment at: lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp:183
@@ -182,3 +182,3 @@
 
-  if (STI.getFeatureBits() & Mips::FeatureMicroMips) {
-    int NewOpcode = Mips::Std2MicroMips (Opcode, Mips::Arch_micromips);
+  if (isMicroMips(STI) || isMicroMips32r6(STI)) {
+    int NewOpcode = isMicroMips(STI) ?
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As mentioned in D8386, I would expect isMicroMips(STI) to be true whenever isMicroMips32r6(STI) is.

http://reviews.llvm.org/D8387

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