[PATCH] [mips][microMIPS] Implement SLL and NOP instructions

[Daniel Sanders]

================
Comment at: lib/Target/Mips/MicroMips32r6InstrFormats.td:267-268
@@ +266,4 @@
+  let Inst{31-26} = 0;
+  let Inst{25-21} = rd;
+  let Inst{20-16} = rt;
+  let Inst{15-11} = shamt;
----------------
The documentation calls them 'rt' and 'rs' respectively. That doesn't sound right though, 'rd' and 'rt' sound more likely.

================
Comment at: lib/Target/Mips/MipsInstrInfo.td:425-436
@@ -424,2 +424,14 @@
 
+def MipsUImm5AsmOperand : AsmOperandClass {
+  let Name = "UImm5";
+  let RenderMethod = "addImmOperands";
+  let ParserMethod = "parseImm";
+  let PredicateMethod = "isUImm<5>";
+}
+
+def uimm5opnd      : Operand<i32> {
+  let PrintMethod = "printUnsignedImm";
+  let ParserMatchClass = MipsUImm5AsmOperand;
+}
+
 def uimm6 : Operand<i32> {
----------------
Please use the existing uimm5 operand. You can add the range checking in a separate patch (either before or after) this one.

http://reviews.llvm.org/D10474

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