let isCodeGenOnly = 1 in {
  /// Arithmetic Instructions (ALU Immediate)
  def ADDiu_MM : MMRel, ArithLogicI<"addiu", simm16, CPURegsOpnd>,
                 ADDI_FM_MM<0xc>;
  def ADDi_MM  : MMRel, ArithLogicI<"addi", simm16, CPURegsOpnd>,
                 ADDI_FM_MM<0x4>;
  def SLTi_MM  : MMRel, SetCC_I<"slti", setlt, simm16, immSExt16, CPURegs>,
                 SLTI_FM_MM<0x24>;
  def SLTiu_MM : MMRel, SetCC_I<"sltiu", setult, simm16, immSExt16, CPURegs>,
                 SLTI_FM_MM<0x2c>;
  def ANDi_MM  : MMRel, ArithLogicI<"andi", uimm16, CPURegsOpnd, immZExt16, and>,
                 ADDI_FM_MM<0x34>;
  def ORi_MM   : MMRel, ArithLogicI<"ori", uimm16, CPURegsOpnd, immZExt16, or>,
                 ADDI_FM_MM<0x14>;
  def XORi_MM  : MMRel, ArithLogicI<"xori", uimm16, CPURegsOpnd, immZExt16, xor>,
                 ADDI_FM_MM<0x1c>;
  def LUi_MM   : MMRel, LoadUpper<"lui", CPURegs, uimm16>, LUI_FM_MM;

  /// Arithmetic Instructions (3-Operand, R-Type)
  def ADDu_MM  : MMRel, ArithLogicR<"addu", CPURegsOpnd>, ADD_FM_MM<0, 0x150>;
  def SUBu_MM  : MMRel, ArithLogicR<"subu", CPURegsOpnd>, ADD_FM_MM<0, 0x1d0>;
  def MUL_MM   : MMRel, ArithLogicR<"mul", CPURegsOpnd>, ADD_FM_MM<0, 0x210>;
  def ADD_MM   : MMRel, ArithLogicR<"add", CPURegsOpnd>, ADD_FM_MM<0, 0x110>;
  def SUB_MM   : MMRel, ArithLogicR<"sub", CPURegsOpnd>, ADD_FM_MM<0, 0x190>;
  def SLT_MM   : MMRel, SetCC_R<"slt", setlt, CPURegs>, ADD_FM_MM<0, 0x350>;
  def SLTu_MM  : MMRel, SetCC_R<"sltu", setult, CPURegs>,
                 ADD_FM_MM<0, 0x390>;
  def AND_MM   : MMRel, ArithLogicR<"and", CPURegsOpnd, 1, IIAlu, and>,
                 ADD_FM_MM<0, 0x250>;
  def OR_MM    : MMRel, ArithLogicR<"or", CPURegsOpnd, 1, IIAlu, or>,
                 ADD_FM_MM<0, 0x290>;
  def XOR_MM   : MMRel, ArithLogicR<"xor", CPURegsOpnd, 1, IIAlu, xor>,
                 ADD_FM_MM<0, 0x310>;
  def NOR_MM   : MMRel, LogicNOR<"nor", CPURegsOpnd>, ADD_FM_MM<0, 0x2d0>;
  def MULT_MM  : MMRel, Mult<"mult", IIImul, CPURegsOpnd, [HI, LO]>,
                 MULT_FM_MM<0x22c>;
  def MULTu_MM : MMRel, Mult<"multu", IIImul, CPURegsOpnd, [HI, LO]>,
                 MULT_FM_MM<0x26c>;

  /// Shift Instructions
  def SLL_MM   : MMRel, shift_rotate_imm<"sll", shamt, CPURegsOpnd>,
                 SRA_FM_MM<0, 0>;
  def SRL_MM   : MMRel, shift_rotate_imm<"srl", shamt, CPURegsOpnd>,
                 SRA_FM_MM<0x40, 0>;
  def SRA_MM   : MMRel, shift_rotate_imm<"sra", shamt, CPURegsOpnd>,
                 SRA_FM_MM<0x80, 0>;
  def SLLV_MM  : MMRel, shift_rotate_reg<"sllv", CPURegsOpnd>,
                 SRLV_FM_MM<0x10, 0>;
  def SRLV_MM  : MMRel, shift_rotate_reg<"srlv", CPURegsOpnd>,
                 SRLV_FM_MM<0x50, 0>;
  def SRAV_MM  : MMRel, shift_rotate_reg<"srav", CPURegsOpnd>,
                 SRLV_FM_MM<0x90, 0>;
  def ROTR_MM  : MMRel, shift_rotate_imm<"rotr", shamt, CPURegsOpnd>,
                 SRA_FM_MM<0xc0, 0>;
  def ROTRV_MM : MMRel, shift_rotate_reg<"rotrv", CPURegsOpnd>,
                 SRLV_FM_MM<0xd0, 0>;

  /// Load and Store Instructions - aligned
  defm LB_MM  : LoadM<"lb", CPURegs, sextloadi8>, MMRel, LW_FM_MM<0x7>;
  defm LBu_MM : LoadM<"lbu", CPURegs, zextloadi8>, MMRel, LW_FM_MM<0x5>;
  defm LH_MM  : LoadM<"lh", CPURegs, sextloadi16>, MMRel, LW_FM_MM<0xf>;
  defm LHu_MM : LoadM<"lhu", CPURegs, zextloadi16>, MMRel, LW_FM_MM<0xd>;
  defm LW_MM  : LoadM<"lw", CPURegs>, MMRel, LW_FM_MM<0x3f>;
  defm SB_MM  : StoreM<"sb", CPURegs, truncstorei8>, MMRel, LW_FM_MM<0x6>;
  defm SH_MM  : StoreM<"sh", CPURegs, truncstorei16>, MMRel, LW_FM_MM<0xe>;
  defm SW_MM  : StoreM<"sw", CPURegs>, MMRel, LW_FM_MM<0x3e>;
}