+class ArithRMM16<string opstr, RegisterOperand RO, bit isComm = 0,
+ InstrItinClass Itin = NoItinerary,
+ SDPatternOperator OpNode = null_frag> :
+ MicroMipsInst16<(outs RO:$rd), (ins RO:$rs, RO:$rt),
+ !strconcat(opstr, "\t$rd, $rs, $rt"),
+ [(set RO:$rd, (OpNode RO:$rs, RO:$rt))], Itin, FrmR> {
+ let isCommutable = isComm;
+}
+
+class LogicRMM16<string opstr, RegisterOperand RO,
+ InstrItinClass Itin = NoItinerary,
+ SDPatternOperator OpNode = null_frag> :
+ MicroMipsInst16<(outs RO:$dst), (ins RO:$rs, RO:$rt),
+ !strconcat(opstr, "\t$rt, $rs"),
+ [(set RO:$dst, (OpNode RO:$rs, RO:$rt))], Itin, FrmR> {
+ let isCommutable = 1;
+ let Constraints = "$rt = $dst";
+}
+
+class NotMM16<string opstr, RegisterOperand RO> :
+ MicroMipsInst16<(outs RO:$rt), (ins RO:$rs),
+ !strconcat(opstr, "\t$rt, $rs"),
+ [(set RO:$rt, (not RO:$rs))], NoItinerary, FrmR>;
+
+class ShiftIMM16<string opstr, Operand ImmOpnd,
+ RegisterOperand RO, SDPatternOperator OpNode = null_frag,
+ SDPatternOperator PF = null_frag,
+ InstrItinClass Itin = NoItinerary> :
+ MicroMipsInst16<(outs RO:$rd), (ins RO:$rt, ImmOpnd:$shamt),
+ !strconcat(opstr, "\t$rd, $rt, $shamt"),
+ [(set RO:$rd, (OpNode RO:$rt, PF:$shamt))], Itin, FrmR>;
+
+class AddImmUR2<string opstr, RegisterOperand RO> :
+ MicroMipsInst16<(outs RO:$rd), (ins RO:$rs, simm3_lsa2:$imm),
+ !strconcat(opstr, "\t$rd, $rs, $imm"),
+ [], NoItinerary, FrmR> {
+ let isCommutable = 1;
+}
+
+class AddImmUS5<string opstr, RegisterOperand RO> :
+ MicroMipsInst16<(outs RO:$dst), (ins RO:$rd, simm4:$imm),
+ !strconcat(opstr, "\t$rd, $imm"), [], NoItinerary, FrmR> {
+ let Constraints = "$rd = $dst";
+ let isCommutable = 1;
+}
+
+class AddImmUR1SP<string opstr, RegisterOperand RO> :
+ MicroMipsInst16<(outs RO:$rd), (ins uimm6_lsl2:$imm),
+ !strconcat(opstr, "\t$rd, $imm"), [], NoItinerary, FrmR>;
+
+class AddImmUSP<string opstr> :
+ MicroMipsInst16<(outs), (ins simm9_addiusp:$imm),
+ !strconcat(opstr, "\t$imm"), [], NoItinerary, FrmI>;
+