-//===- MipsRegisterInfo.td - Mips Register defs -----------------*- C++ -*-===//
+//===-- MipsRegisterInfo.td - Mips Register defs -----------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Bruno Cardoso Lopes and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Declarations that describe the MIPS register file
//===----------------------------------------------------------------------===//
+let Namespace = "Mips" in {
+def sub_fpeven : SubRegIndex;
+def sub_fpodd : SubRegIndex;
+def sub_32 : SubRegIndex;
+}
// We have banks of 32 registers each.
class MipsReg<string n> : Register<n> {
let Namespace = "Mips";
}
+class MipsRegWithSubRegs<string n, list<Register> subregs>
+ : RegisterWithSubRegs<n, subregs> {
+ field bits<5> Num;
+ let Namespace = "Mips";
+}
+
// Mips CPU Registers
class MipsGPRReg<bits<5> num, string n> : MipsReg<n> {
let Num = num;
}
-// CPU GPR Registers
-def ZERO : MipsGPRReg< 0, "ZERO">, DwarfRegNum<0>;
-def AT : MipsGPRReg< 1, "AT">, DwarfRegNum<1>;
-def V0 : MipsGPRReg< 2, "2">, DwarfRegNum<2>;
-def V1 : MipsGPRReg< 3, "3">, DwarfRegNum<3>;
-def A0 : MipsGPRReg< 4, "4">, DwarfRegNum<5>;
-def A1 : MipsGPRReg< 5, "5">, DwarfRegNum<5>;
-def A2 : MipsGPRReg< 6, "6">, DwarfRegNum<6>;
-def A3 : MipsGPRReg< 7, "7">, DwarfRegNum<7>;
-def T0 : MipsGPRReg< 8, "8">, DwarfRegNum<8>;
-def T1 : MipsGPRReg< 9, "9">, DwarfRegNum<9>;
-def T2 : MipsGPRReg< 10, "10">, DwarfRegNum<10>;
-def T3 : MipsGPRReg< 11, "11">, DwarfRegNum<11>;
-def T4 : MipsGPRReg< 12, "12">, DwarfRegNum<12>;
-def T5 : MipsGPRReg< 13, "13">, DwarfRegNum<13>;
-def T6 : MipsGPRReg< 14, "14">, DwarfRegNum<14>;
-def T7 : MipsGPRReg< 15, "15">, DwarfRegNum<15>;
-def S0 : MipsGPRReg< 16, "16">, DwarfRegNum<16>;
-def S1 : MipsGPRReg< 17, "17">, DwarfRegNum<17>;
-def S2 : MipsGPRReg< 18, "18">, DwarfRegNum<18>;
-def S3 : MipsGPRReg< 19, "19">, DwarfRegNum<19>;
-def S4 : MipsGPRReg< 20, "20">, DwarfRegNum<20>;
-def S5 : MipsGPRReg< 21, "21">, DwarfRegNum<21>;
-def S6 : MipsGPRReg< 22, "22">, DwarfRegNum<22>;
-def S7 : MipsGPRReg< 23, "23">, DwarfRegNum<23>;
-def T8 : MipsGPRReg< 24, "24">, DwarfRegNum<24>;
-def T9 : MipsGPRReg< 25, "25">, DwarfRegNum<25>;
-def K0 : MipsGPRReg< 26, "26">, DwarfRegNum<26>;
-def K1 : MipsGPRReg< 27, "27">, DwarfRegNum<27>;
-def GP : MipsGPRReg< 28, "GP">, DwarfRegNum<28>;
-def SP : MipsGPRReg< 29, "SP">, DwarfRegNum<29>;
-def FP : MipsGPRReg< 30, "FP">, DwarfRegNum<30>;
-def RA : MipsGPRReg< 31, "RA">, DwarfRegNum<31>;
-
-// CPU Registers Class
-def CPURegs : RegisterClass<"Mips", [i32], 32,
+// Mips 64-bit CPU Registers
+class Mips64GPRReg<bits<5> num, string n, list<Register> subregs>
+ : MipsRegWithSubRegs<n, subregs> {
+ let Num = num;
+ let SubRegIndices = [sub_32];
+}
+
+// Mips 32-bit FPU Registers
+class FPR<bits<5> num, string n> : MipsReg<n> {
+ let Num = num;
+}
+
+// Mips 64-bit (aliased) FPU Registers
+class AFPR<bits<5> num, string n, list<Register> subregs>
+ : MipsRegWithSubRegs<n, subregs> {
+ let Num = num;
+ let SubRegIndices = [sub_fpeven, sub_fpodd];
+ let CoveredBySubRegs = 1;
+}
+
+class AFPR64<bits<5> num, string n, list<Register> subregs>
+ : MipsRegWithSubRegs<n, subregs> {
+ let Num = num;
+ let SubRegIndices = [sub_32];
+}
+
+// Mips Hardware Registers
+class HWR<bits<5> num, string n> : MipsReg<n> {
+ let Num = num;
+}
+
+//===----------------------------------------------------------------------===//
+// Registers
+//===----------------------------------------------------------------------===//
+
+let Namespace = "Mips" in {
+ // General Purpose Registers
+ def ZERO : MipsGPRReg< 0, "zero">, DwarfRegNum<[0]>;
+ def AT : MipsGPRReg< 1, "at">, DwarfRegNum<[1]>;
+ def V0 : MipsGPRReg< 2, "2">, DwarfRegNum<[2]>;
+ def V1 : MipsGPRReg< 3, "3">, DwarfRegNum<[3]>;
+ def A0 : MipsGPRReg< 4, "4">, DwarfRegNum<[4]>;
+ def A1 : MipsGPRReg< 5, "5">, DwarfRegNum<[5]>;
+ def A2 : MipsGPRReg< 6, "6">, DwarfRegNum<[6]>;
+ def A3 : MipsGPRReg< 7, "7">, DwarfRegNum<[7]>;
+ def T0 : MipsGPRReg< 8, "8">, DwarfRegNum<[8]>;
+ def T1 : MipsGPRReg< 9, "9">, DwarfRegNum<[9]>;
+ def T2 : MipsGPRReg< 10, "10">, DwarfRegNum<[10]>;
+ def T3 : MipsGPRReg< 11, "11">, DwarfRegNum<[11]>;
+ def T4 : MipsGPRReg< 12, "12">, DwarfRegNum<[12]>;
+ def T5 : MipsGPRReg< 13, "13">, DwarfRegNum<[13]>;
+ def T6 : MipsGPRReg< 14, "14">, DwarfRegNum<[14]>;
+ def T7 : MipsGPRReg< 15, "15">, DwarfRegNum<[15]>;
+ def S0 : MipsGPRReg< 16, "16">, DwarfRegNum<[16]>;
+ def S1 : MipsGPRReg< 17, "17">, DwarfRegNum<[17]>;
+ def S2 : MipsGPRReg< 18, "18">, DwarfRegNum<[18]>;
+ def S3 : MipsGPRReg< 19, "19">, DwarfRegNum<[19]>;
+ def S4 : MipsGPRReg< 20, "20">, DwarfRegNum<[20]>;
+ def S5 : MipsGPRReg< 21, "21">, DwarfRegNum<[21]>;
+ def S6 : MipsGPRReg< 22, "22">, DwarfRegNum<[22]>;
+ def S7 : MipsGPRReg< 23, "23">, DwarfRegNum<[23]>;
+ def T8 : MipsGPRReg< 24, "24">, DwarfRegNum<[24]>;
+ def T9 : MipsGPRReg< 25, "25">, DwarfRegNum<[25]>;
+ def K0 : MipsGPRReg< 26, "26">, DwarfRegNum<[26]>;
+ def K1 : MipsGPRReg< 27, "27">, DwarfRegNum<[27]>;
+ def GP : MipsGPRReg< 28, "gp">, DwarfRegNum<[28]>;
+ def SP : MipsGPRReg< 29, "sp">, DwarfRegNum<[29]>;
+ def FP : MipsGPRReg< 30, "fp">, DwarfRegNum<[30]>;
+ def RA : MipsGPRReg< 31, "ra">, DwarfRegNum<[31]>;
+
+ // General Purpose 64-bit Registers
+ def ZERO_64 : Mips64GPRReg< 0, "zero", [ZERO]>, DwarfRegNum<[0]>;
+ def AT_64 : Mips64GPRReg< 1, "at", [AT]>, DwarfRegNum<[1]>;
+ def V0_64 : Mips64GPRReg< 2, "2", [V0]>, DwarfRegNum<[2]>;
+ def V1_64 : Mips64GPRReg< 3, "3", [V1]>, DwarfRegNum<[3]>;
+ def A0_64 : Mips64GPRReg< 4, "4", [A0]>, DwarfRegNum<[4]>;
+ def A1_64 : Mips64GPRReg< 5, "5", [A1]>, DwarfRegNum<[5]>;
+ def A2_64 : Mips64GPRReg< 6, "6", [A2]>, DwarfRegNum<[6]>;
+ def A3_64 : Mips64GPRReg< 7, "7", [A3]>, DwarfRegNum<[7]>;
+ def T0_64 : Mips64GPRReg< 8, "8", [T0]>, DwarfRegNum<[8]>;
+ def T1_64 : Mips64GPRReg< 9, "9", [T1]>, DwarfRegNum<[9]>;
+ def T2_64 : Mips64GPRReg< 10, "10", [T2]>, DwarfRegNum<[10]>;
+ def T3_64 : Mips64GPRReg< 11, "11", [T3]>, DwarfRegNum<[11]>;
+ def T4_64 : Mips64GPRReg< 12, "12", [T4]>, DwarfRegNum<[12]>;
+ def T5_64 : Mips64GPRReg< 13, "13", [T5]>, DwarfRegNum<[13]>;
+ def T6_64 : Mips64GPRReg< 14, "14", [T6]>, DwarfRegNum<[14]>;
+ def T7_64 : Mips64GPRReg< 15, "15", [T7]>, DwarfRegNum<[15]>;
+ def S0_64 : Mips64GPRReg< 16, "16", [S0]>, DwarfRegNum<[16]>;
+ def S1_64 : Mips64GPRReg< 17, "17", [S1]>, DwarfRegNum<[17]>;
+ def S2_64 : Mips64GPRReg< 18, "18", [S2]>, DwarfRegNum<[18]>;
+ def S3_64 : Mips64GPRReg< 19, "19", [S3]>, DwarfRegNum<[19]>;
+ def S4_64 : Mips64GPRReg< 20, "20", [S4]>, DwarfRegNum<[20]>;
+ def S5_64 : Mips64GPRReg< 21, "21", [S5]>, DwarfRegNum<[21]>;
+ def S6_64 : Mips64GPRReg< 22, "22", [S6]>, DwarfRegNum<[22]>;
+ def S7_64 : Mips64GPRReg< 23, "23", [S7]>, DwarfRegNum<[23]>;
+ def T8_64 : Mips64GPRReg< 24, "24", [T8]>, DwarfRegNum<[24]>;
+ def T9_64 : Mips64GPRReg< 25, "25", [T9]>, DwarfRegNum<[25]>;
+ def K0_64 : Mips64GPRReg< 26, "26", [K0]>, DwarfRegNum<[26]>;
+ def K1_64 : Mips64GPRReg< 27, "27", [K1]>, DwarfRegNum<[27]>;
+ def GP_64 : Mips64GPRReg< 28, "gp", [GP]>, DwarfRegNum<[28]>;
+ def SP_64 : Mips64GPRReg< 29, "sp", [SP]>, DwarfRegNum<[29]>;
+ def FP_64 : Mips64GPRReg< 30, "fp", [FP]>, DwarfRegNum<[30]>;
+ def RA_64 : Mips64GPRReg< 31, "ra", [RA]>, DwarfRegNum<[31]>;
+
+ /// Mips Single point precision FPU Registers
+ def F0 : FPR< 0, "f0">, DwarfRegNum<[32]>;
+ def F1 : FPR< 1, "f1">, DwarfRegNum<[33]>;
+ def F2 : FPR< 2, "f2">, DwarfRegNum<[34]>;
+ def F3 : FPR< 3, "f3">, DwarfRegNum<[35]>;
+ def F4 : FPR< 4, "f4">, DwarfRegNum<[36]>;
+ def F5 : FPR< 5, "f5">, DwarfRegNum<[37]>;
+ def F6 : FPR< 6, "f6">, DwarfRegNum<[38]>;
+ def F7 : FPR< 7, "f7">, DwarfRegNum<[39]>;
+ def F8 : FPR< 8, "f8">, DwarfRegNum<[40]>;
+ def F9 : FPR< 9, "f9">, DwarfRegNum<[41]>;
+ def F10 : FPR<10, "f10">, DwarfRegNum<[42]>;
+ def F11 : FPR<11, "f11">, DwarfRegNum<[43]>;
+ def F12 : FPR<12, "f12">, DwarfRegNum<[44]>;
+ def F13 : FPR<13, "f13">, DwarfRegNum<[45]>;
+ def F14 : FPR<14, "f14">, DwarfRegNum<[46]>;
+ def F15 : FPR<15, "f15">, DwarfRegNum<[47]>;
+ def F16 : FPR<16, "f16">, DwarfRegNum<[48]>;
+ def F17 : FPR<17, "f17">, DwarfRegNum<[49]>;
+ def F18 : FPR<18, "f18">, DwarfRegNum<[50]>;
+ def F19 : FPR<19, "f19">, DwarfRegNum<[51]>;
+ def F20 : FPR<20, "f20">, DwarfRegNum<[52]>;
+ def F21 : FPR<21, "f21">, DwarfRegNum<[53]>;
+ def F22 : FPR<22, "f22">, DwarfRegNum<[54]>;
+ def F23 : FPR<23, "f23">, DwarfRegNum<[55]>;
+ def F24 : FPR<24, "f24">, DwarfRegNum<[56]>;
+ def F25 : FPR<25, "f25">, DwarfRegNum<[57]>;
+ def F26 : FPR<26, "f26">, DwarfRegNum<[58]>;
+ def F27 : FPR<27, "f27">, DwarfRegNum<[59]>;
+ def F28 : FPR<28, "f28">, DwarfRegNum<[60]>;
+ def F29 : FPR<29, "f29">, DwarfRegNum<[61]>;
+ def F30 : FPR<30, "f30">, DwarfRegNum<[62]>;
+ def F31 : FPR<31, "f31">, DwarfRegNum<[63]>;
+
+ /// Mips Double point precision FPU Registers (aliased
+ /// with the single precision to hold 64 bit values)
+ def D0 : AFPR< 0, "f0", [F0, F1]>;
+ def D1 : AFPR< 2, "f2", [F2, F3]>;
+ def D2 : AFPR< 4, "f4", [F4, F5]>;
+ def D3 : AFPR< 6, "f6", [F6, F7]>;
+ def D4 : AFPR< 8, "f8", [F8, F9]>;
+ def D5 : AFPR<10, "f10", [F10, F11]>;
+ def D6 : AFPR<12, "f12", [F12, F13]>;
+ def D7 : AFPR<14, "f14", [F14, F15]>;
+ def D8 : AFPR<16, "f16", [F16, F17]>;
+ def D9 : AFPR<18, "f18", [F18, F19]>;
+ def D10 : AFPR<20, "f20", [F20, F21]>;
+ def D11 : AFPR<22, "f22", [F22, F23]>;
+ def D12 : AFPR<24, "f24", [F24, F25]>;
+ def D13 : AFPR<26, "f26", [F26, F27]>;
+ def D14 : AFPR<28, "f28", [F28, F29]>;
+ def D15 : AFPR<30, "f30", [F30, F31]>;
+
+ /// Mips Double point precision FPU Registers in MFP64 mode.
+ def D0_64 : AFPR64<0, "f0", [F0]>, DwarfRegNum<[32]>;
+ def D1_64 : AFPR64<1, "f1", [F1]>, DwarfRegNum<[33]>;
+ def D2_64 : AFPR64<2, "f2", [F2]>, DwarfRegNum<[34]>;
+ def D3_64 : AFPR64<3, "f3", [F3]>, DwarfRegNum<[35]>;
+ def D4_64 : AFPR64<4, "f4", [F4]>, DwarfRegNum<[36]>;
+ def D5_64 : AFPR64<5, "f5", [F5]>, DwarfRegNum<[37]>;
+ def D6_64 : AFPR64<6, "f6", [F6]>, DwarfRegNum<[38]>;
+ def D7_64 : AFPR64<7, "f7", [F7]>, DwarfRegNum<[39]>;
+ def D8_64 : AFPR64<8, "f8", [F8]>, DwarfRegNum<[40]>;
+ def D9_64 : AFPR64<9, "f9", [F9]>, DwarfRegNum<[41]>;
+ def D10_64 : AFPR64<10, "f10", [F10]>, DwarfRegNum<[42]>;
+ def D11_64 : AFPR64<11, "f11", [F11]>, DwarfRegNum<[43]>;
+ def D12_64 : AFPR64<12, "f12", [F12]>, DwarfRegNum<[44]>;
+ def D13_64 : AFPR64<13, "f13", [F13]>, DwarfRegNum<[45]>;
+ def D14_64 : AFPR64<14, "f14", [F14]>, DwarfRegNum<[46]>;
+ def D15_64 : AFPR64<15, "f15", [F15]>, DwarfRegNum<[47]>;
+ def D16_64 : AFPR64<16, "f16", [F16]>, DwarfRegNum<[48]>;
+ def D17_64 : AFPR64<17, "f17", [F17]>, DwarfRegNum<[49]>;
+ def D18_64 : AFPR64<18, "f18", [F18]>, DwarfRegNum<[50]>;
+ def D19_64 : AFPR64<19, "f19", [F19]>, DwarfRegNum<[51]>;
+ def D20_64 : AFPR64<20, "f20", [F20]>, DwarfRegNum<[52]>;
+ def D21_64 : AFPR64<21, "f21", [F21]>, DwarfRegNum<[53]>;
+ def D22_64 : AFPR64<22, "f22", [F22]>, DwarfRegNum<[54]>;
+ def D23_64 : AFPR64<23, "f23", [F23]>, DwarfRegNum<[55]>;
+ def D24_64 : AFPR64<24, "f24", [F24]>, DwarfRegNum<[56]>;
+ def D25_64 : AFPR64<25, "f25", [F25]>, DwarfRegNum<[57]>;
+ def D26_64 : AFPR64<26, "f26", [F26]>, DwarfRegNum<[58]>;
+ def D27_64 : AFPR64<27, "f27", [F27]>, DwarfRegNum<[59]>;
+ def D28_64 : AFPR64<28, "f28", [F28]>, DwarfRegNum<[60]>;
+ def D29_64 : AFPR64<29, "f29", [F29]>, DwarfRegNum<[61]>;
+ def D30_64 : AFPR64<30, "f30", [F30]>, DwarfRegNum<[62]>;
+ def D31_64 : AFPR64<31, "f31", [F31]>, DwarfRegNum<[63]>;
+
+ // Hi/Lo registers
+ def HI : Register<"hi">, DwarfRegNum<[64]>;
+ def LO : Register<"lo">, DwarfRegNum<[65]>;
+
+ let SubRegIndices = [sub_32] in {
+ def HI64 : RegisterWithSubRegs<"hi", [HI]>;
+ def LO64 : RegisterWithSubRegs<"lo", [LO]>;
+ }
+
+ // Status flags register
+ def FCR31 : Register<"31">;
+
+ // fcc0 register
+ def FCC0 : Register<"fcc0">;
+
+ // PC register
+ def PC : Register<"pc">;
+
+ // Hardware register $29
+ def HWR29 : Register<"29">;
+ def HWR29_64 : Register<"29">;
+
+ // Accum registers
+ def LO0 : Register<"ac0"> {
+ let Aliases = [LO];
+ }
+ def HI0 : Register<"hi0"> {
+ let Aliases = [HI];
+ }
+ def LO1 : Register<"ac1">;
+ def HI1 : Register<"hi1">;
+ def LO2 : Register<"ac2">;
+ def HI2 : Register<"hi2">;
+ def LO3 : Register<"ac3">;
+ def HI3 : Register<"hi3">;
+
+ let SubRegIndices = [sub_32] in {
+ def LO0_64 : RegisterWithSubRegs<"ac0", [LO0]> {
+ let Aliases = [LO64];
+ }
+ def HI0_64 : RegisterWithSubRegs<"hi0", [HI0]> {
+ let Aliases = [HI64];
+ }
+ def LO1_64 : RegisterWithSubRegs<"ac1", [LO1]>;
+ def HI1_64 : RegisterWithSubRegs<"hi1", [HI1]>;
+ def LO2_64 : RegisterWithSubRegs<"ac2", [LO2]>;
+ def HI2_64 : RegisterWithSubRegs<"hi2", [HI2]>;
+ def LO3_64 : RegisterWithSubRegs<"ac3", [LO3]>;
+ def HI3_64 : RegisterWithSubRegs<"hi3", [HI3]>;
+ }
+
+ def DSPCtrl : Register<"dspctrl">;
+}
+
+//===----------------------------------------------------------------------===//
+// Register Classes
+//===----------------------------------------------------------------------===//
+
+class CPURegsClass<list<ValueType> regTypes> :
+ RegisterClass<"Mips", regTypes, 32, (add
+ // Reserved
+ ZERO, AT,
// Return Values and Arguments
- [V0, V1, A0, A1, A2, A3,
+ V0, V1, A0, A1, A2, A3,
// Not preserved across procedure calls
- T0, T1, T2, T3, T4, T5, T6, T7, T8, T9,
+ T0, T1, T2, T3, T4, T5, T6, T7,
// Callee save
S0, S1, S2, S3, S4, S5, S6, S7,
+ // Not preserved across procedure calls
+ T8, T9,
// Reserved
- ZERO, AT, K0, K1, GP, SP, FP, RA]>
-{
- let MethodProtos = [{
- iterator allocation_order_end(const MachineFunction &MF) const;
- }];
- let MethodBodies = [{
- CPURegsClass::iterator
- CPURegsClass::allocation_order_end(const MachineFunction &MF) const {
- // The last 8 registers on the list above are reserved
- return end()-8;
- }
- }];
-}
+ K0, K1, GP, SP, FP, RA)>;
+
+def CPURegs : CPURegsClass<[i32]>;
+def DSPRegs : CPURegsClass<[v4i8, v2i16]>;
+
+def CPU64Regs : RegisterClass<"Mips", [i64], 64, (add
+// Reserved
+ ZERO_64, AT_64,
+ // Return Values and Arguments
+ V0_64, V1_64, A0_64, A1_64, A2_64, A3_64,
+ // Not preserved across procedure calls
+ T0_64, T1_64, T2_64, T3_64, T4_64, T5_64, T6_64, T7_64,
+ // Callee save
+ S0_64, S1_64, S2_64, S3_64, S4_64, S5_64, S6_64, S7_64,
+ // Not preserved across procedure calls
+ T8_64, T9_64,
+ // Reserved
+ K0_64, K1_64, GP_64, SP_64, FP_64, RA_64)>;
+
+def CPU16Regs : RegisterClass<"Mips", [i32], 32, (add
+ // Return Values and Arguments
+ V0, V1, A0, A1, A2, A3,
+ // Callee save
+ S0, S1)>;
+
+def CPURAReg : RegisterClass<"Mips", [i32], 32, (add RA)>;
+
+
+// 64bit fp:
+// * FGR64 - 32 64-bit registers
+// * AFGR64 - 16 32-bit even registers (32-bit FP Mode)
+//
+// 32bit fp:
+// * FGR32 - 16 32-bit even registers
+// * FGR32 - 32 32-bit registers (single float only mode)
+def FGR32 : RegisterClass<"Mips", [f32], 32, (sequence "F%u", 0, 31)>;
+
+def AFGR64 : RegisterClass<"Mips", [f64], 64, (add
+ // Return Values and Arguments
+ D0, D1,
+ // Not preserved across procedure calls
+ D2, D3, D4, D5,
+ // Return Values and Arguments
+ D6, D7,
+ // Not preserved across procedure calls
+ D8, D9,
+ // Callee save
+ D10, D11, D12, D13, D14, D15)>;
+
+def FGR64 : RegisterClass<"Mips", [f64], 64, (sequence "D%u_64", 0, 31)>;
+
+// Condition Register for floating point operations
+def CCR : RegisterClass<"Mips", [i32], 32, (add FCR31,FCC0)>;
+
+// Hi/Lo Registers
+def HILO : RegisterClass<"Mips", [i32], 32, (add HI, LO)>;
+def HILO64 : RegisterClass<"Mips", [i64], 64, (add HI64, LO64)>;
+
+// Hardware registers
+def HWRegs : RegisterClass<"Mips", [i32], 32, (add HWR29)>;
+def HWRegs64 : RegisterClass<"Mips", [i64], 32, (add HWR29_64)>;
+
+// Accum Registers
+def HIRegs : RegisterClass<"Mips", [i32], 32, (sequence "HI%u", 0, 3)>;
+def LORegs : RegisterClass<"Mips", [i32], 32, (sequence "LO%u", 0, 3)>;
+
+def HI64Regs : RegisterClass<"Mips", [i64], 64, (sequence "HI%u_64", 0, 3)>;
+def LO64Regs : RegisterClass<"Mips", [i64], 64, (sequence "LO%u_64", 0, 3)>;
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