ARMInstrThumb2.td

                            []>;

def t2LDRSB_PRE : T2Iidxldst<1, 0b00, 1, 1, (outs GPR:$dst, GPR:$base_wb),
                            (ins t2addrmode_imm8:$addr),
                            AddrModeT2_i8, IndexModePre, IIC_iLoadiu,
                            "ldrsb", "\t$dst, $addr!", "$addr.base = $base_wb",
                            []>;
def t2LDRSB_POST : T2Iidxldst<1, 0b00, 1, 0, (outs GPR:$dst, GPR:$base_wb),
                            (ins GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePost, IIC_iLoadiu,
                        "ldrsb", "\t$dst, [$base], $offset", "$base = $base_wb",
                            []>;

def t2LDRSH_PRE : T2Iidxldst<1, 0b01, 1, 1, (outs GPR:$dst, GPR:$base_wb),
                            (ins t2addrmode_imm8:$addr),
                            AddrModeT2_i8, IndexModePre, IIC_iLoadiu,
                            "ldrsh", "\t$dst, $addr!", "$addr.base = $base_wb",
                            []>;
def t2LDRSH_POST : T2Iidxldst<1, 0b01, 1, 0, (outs GPR:$dst, GPR:$base_wb),
                            (ins GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePost, IIC_iLoadiu,
                        "ldrsh", "\t$dst, [$base], $offset", "$base = $base_wb",
                            []>;
}

// LDRT, LDRBT, LDRHT, LDRSBT, LDRSHT all have offset mode (PUW=0b110) and are
// for disassembly only.
// Ref: A8.6.57 LDR (immediate, Thumb) Encoding T4
class T2IldT<bit signed, bits<2> type, string opc>
  : T2Ii8<(outs GPR:$dst), (ins t2addrmode_imm8:$addr), IIC_iLoadi, opc,
          "\t$dst, $addr", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-25} = 0b00;
  let Inst{24} = signed;
  let Inst{23} = 0;
  let Inst{22-21} = type;
  let Inst{20} = 1; // load
  let Inst{11} = 1;
  let Inst{10-8} = 0b110; // PUW.
}

def t2LDRT   : T2IldT<0, 0b10, "ldrt">;
def t2LDRBT  : T2IldT<0, 0b00, "ldrbt">;
def t2LDRHT  : T2IldT<0, 0b01, "ldrht">;
def t2LDRSBT : T2IldT<1, 0b00, "ldrsbt">;
def t2LDRSHT : T2IldT<1, 0b01, "ldrsht">;

// Store
defm t2STR :T2I_st<0b10,"str", BinOpFrag<(store node:$LHS, node:$RHS)>>;
defm t2STRB:T2I_st<0b00,"strb",BinOpFrag<(truncstorei8 node:$LHS, node:$RHS)>>;
defm t2STRH:T2I_st<0b01,"strh",BinOpFrag<(truncstorei16 node:$LHS, node:$RHS)>>;

// Store doubleword
let mayLoad = 1, hasExtraSrcRegAllocReq = 1 in
def t2STRDi8 : T2Ii8s4<1, 0, 0, (outs),
                       (ins GPR:$src1, GPR:$src2, t2addrmode_imm8s4:$addr),
               IIC_iStorer, "strd", "\t$src1, $addr", []>;

// Indexed stores
def t2STR_PRE  : T2Iidxldst<0, 0b10, 0, 1, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePre, IIC_iStoreiu,
                         "str", "\t$src, [$base, $offset]!", "$base = $base_wb",
             [(set GPR:$base_wb,
                   (pre_store GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

def t2STR_POST : T2Iidxldst<0, 0b10, 0, 0, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePost, IIC_iStoreiu,
                          "str", "\t$src, [$base], $offset", "$base = $base_wb",
             [(set GPR:$base_wb,
                  (post_store GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

def t2STRH_PRE  : T2Iidxldst<0, 0b01, 0, 1, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePre, IIC_iStoreiu,
                        "strh", "\t$src, [$base, $offset]!", "$base = $base_wb",
        [(set GPR:$base_wb,
              (pre_truncsti16 GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

def t2STRH_POST : T2Iidxldst<0, 0b01, 0, 0, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePost, IIC_iStoreiu,
                         "strh", "\t$src, [$base], $offset", "$base = $base_wb",
       [(set GPR:$base_wb,
             (post_truncsti16 GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

def t2STRB_PRE  : T2Iidxldst<0, 0b00, 0, 1, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePre, IIC_iStoreiu,
                        "strb", "\t$src, [$base, $offset]!", "$base = $base_wb",
         [(set GPR:$base_wb,
               (pre_truncsti8 GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

def t2STRB_POST : T2Iidxldst<0, 0b00, 0, 0, (outs GPR:$base_wb),
                            (ins GPR:$src, GPR:$base, t2am_imm8_offset:$offset),
                            AddrModeT2_i8, IndexModePost, IIC_iStoreiu,
                         "strb", "\t$src, [$base], $offset", "$base = $base_wb",
        [(set GPR:$base_wb,
              (post_truncsti8 GPR:$src, GPR:$base, t2am_imm8_offset:$offset))]>;

// STRT, STRBT, STRHT all have offset mode (PUW=0b110) and are for disassembly
// only.
// Ref: A8.6.193 STR (immediate, Thumb) Encoding T4
class T2IstT<bits<2> type, string opc>
  : T2Ii8<(outs GPR:$src), (ins t2addrmode_imm8:$addr), IIC_iStorei, opc,
          "\t$src, $addr", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-25} = 0b00;
  let Inst{24} = 0; // not signed
  let Inst{23} = 0;
  let Inst{22-21} = type;
  let Inst{20} = 0; // store
  let Inst{11} = 1;
  let Inst{10-8} = 0b110; // PUW
}

def t2STRT   : T2IstT<0b10, "strt">;
def t2STRBT  : T2IstT<0b00, "strbt">;
def t2STRHT  : T2IstT<0b01, "strht">;

// ldrd / strd pre / post variants
// For disassembly only.

def t2LDRD_PRE  : T2Ii8s4<1, 1, 1, (outs GPR:$dst1, GPR:$dst2),
                 (ins GPR:$base, t2am_imm8s4_offset:$imm), NoItinerary,
                 "ldrd", "\t$dst1, $dst2, [$base, $imm]!", []>;

def t2LDRD_POST : T2Ii8s4<0, 1, 1, (outs GPR:$dst1, GPR:$dst2),
                 (ins GPR:$base, t2am_imm8s4_offset:$imm), NoItinerary,
                 "ldrd", "\t$dst1, $dst2, [$base], $imm", []>;

def t2STRD_PRE  : T2Ii8s4<1, 1, 0, (outs),
                 (ins GPR:$src1, GPR:$src2, GPR:$base, t2am_imm8s4_offset:$imm),
                 NoItinerary, "strd", "\t$src1, $src2, [$base, $imm]!", []>;

def t2STRD_POST : T2Ii8s4<0, 1, 0, (outs),
                 (ins GPR:$src1, GPR:$src2, GPR:$base, t2am_imm8s4_offset:$imm),
                 NoItinerary, "strd", "\t$src1, $src2, [$base], $imm", []>;

// T2Ipl (Preload Data/Instruction) signals the memory system of possible future
// data/instruction access.  These are for disassembly only.
//
// A8.6.117, A8.6.118.  Different instructions are generated for #0 and #-0.
// The neg_zero operand translates -0 to -1, -1 to -2, ..., etc.
multiclass T2Ipl<bit instr, bit write, string opc> {

  def i12 : T2I<(outs), (ins GPR:$base, i32imm:$imm), IIC_iLoadi, opc,
                "\t[$base, $imm]", []> {
    let Inst{31-25} = 0b1111100;
    let Inst{24} = instr;
    let Inst{23} = 1; // U = 1
    let Inst{22} = 0;
    let Inst{21} = write;
    let Inst{20} = 1;
    let Inst{15-12} = 0b1111;
  }

  def i8 : T2I<(outs), (ins GPR:$base, neg_zero:$imm), IIC_iLoadi, opc,
                "\t[$base, $imm]", []> {
    let Inst{31-25} = 0b1111100;
    let Inst{24} = instr;
    let Inst{23} = 0; // U = 0
    let Inst{22} = 0;
    let Inst{21} = write;
    let Inst{20} = 1;
    let Inst{15-12} = 0b1111;
    let Inst{11-8} = 0b1100;
  }

  def pci : T2I<(outs), (ins GPR:$base, neg_zero:$imm), IIC_iLoadi, opc,
                "\t[pc, $imm]", []> {
    let Inst{31-25} = 0b1111100;
    let Inst{24} = instr;
    let Inst{23} = ?; // add = (U == 1)
    let Inst{22} = 0;
    let Inst{21} = write;
    let Inst{20} = 1;
    let Inst{19-16} = 0b1111; // Rn = 0b1111
    let Inst{15-12} = 0b1111;
  }

  def r   : T2I<(outs), (ins GPR:$base, GPR:$a), IIC_iLoadi, opc,
                "\t[$base, $a]", []> {
    let Inst{31-25} = 0b1111100;
    let Inst{24} = instr;
    let Inst{23} = 0; // add = TRUE for T1
    let Inst{22} = 0;
    let Inst{21} = write;
    let Inst{20} = 1;
    let Inst{15-12} = 0b1111;
    let Inst{11-6} = 0000000;
    let Inst{5-4} = 0b00; // no shift is applied
  }

  def s   : T2I<(outs), (ins GPR:$base, GPR:$a, i32imm:$shamt), IIC_iLoadi, opc,
                "\t[$base, $a, lsl $shamt]", []> {
    let Inst{31-25} = 0b1111100;
    let Inst{24} = instr;
    let Inst{23} = 0; // add = TRUE for T1
    let Inst{22} = 0;
    let Inst{21} = write;
    let Inst{20} = 1;
    let Inst{15-12} = 0b1111;
    let Inst{11-6} = 0000000;
  }
}

defm t2PLD  : T2Ipl<0, 0, "pld">;
defm t2PLDW : T2Ipl<0, 1, "pldw">;
defm t2PLI  : T2Ipl<1, 0, "pli">;

//===----------------------------------------------------------------------===//
//  Load / store multiple Instructions.
//

let mayLoad = 1, hasExtraDefRegAllocReq = 1 in {
def t2LDM : T2XI<(outs), (ins addrmode4:$addr, pred:$p,
                          reglist:$dsts, variable_ops), IIC_iLoadm,
                 "ldm${addr:submode}${p}${addr:wide}\t$addr, $dsts", []> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b00;
  let Inst{24-23} = {?, ?}; // IA: '01', DB: '10'
  let Inst{22} = 0;
  let Inst{21} = 0; // The W bit.
  let Inst{20} = 1; // Load
}

def t2LDM_UPD : T2XIt<(outs GPR:$wb), (ins addrmode4:$addr, pred:$p,
                                       reglist:$dsts, variable_ops), IIC_iLoadm,
                      "ldm${addr:submode}${p}${addr:wide}\t$addr!, $dsts",
                      "$addr.addr = $wb", []> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b00;
  let Inst{24-23} = {?, ?}; // IA: '01', DB: '10'
  let Inst{22} = 0;
  let Inst{21} = 1; // The W bit.
  let Inst{20} = 1; // Load
}
} // mayLoad, hasExtraDefRegAllocReq

let mayStore = 1, hasExtraSrcRegAllocReq = 1 in {
def t2STM : T2XI<(outs), (ins addrmode4:$addr, pred:$p,
                          reglist:$srcs, variable_ops), IIC_iStorem,
                 "stm${addr:submode}${p}${addr:wide}\t$addr, $srcs", []> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b00;
  let Inst{24-23} = {?, ?}; // IA: '01', DB: '10'
  let Inst{22} = 0;
  let Inst{21} = 0; // The W bit.
  let Inst{20} = 0; // Store
}

def t2STM_UPD : T2XIt<(outs GPR:$wb), (ins addrmode4:$addr, pred:$p,
                                       reglist:$srcs, variable_ops),
                      IIC_iStorem,
                      "stm${addr:submode}${p}${addr:wide}\t$addr!, $srcs",
                      "$addr.addr = $wb", []> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b00;
  let Inst{24-23} = {?, ?}; // IA: '01', DB: '10'
  let Inst{22} = 0;
  let Inst{21} = 1; // The W bit.
  let Inst{20} = 0; // Store
}
} // mayStore, hasExtraSrcRegAllocReq

//===----------------------------------------------------------------------===//
//  Move Instructions.
//

let neverHasSideEffects = 1 in
def t2MOVr : T2sI<(outs GPR:$dst), (ins GPR:$src), IIC_iMOVr,
                   "mov", ".w\t$dst, $src", []> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b01;
  let Inst{24-21} = 0b0010;
  let Inst{20} = ?; // The S bit.
  let Inst{19-16} = 0b1111; // Rn
  let Inst{14-12} = 0b000;
  let Inst{7-4} = 0b0000;
}

// AddedComplexity to ensure isel tries t2MOVi before t2MOVi16.
let isReMaterializable = 1, isAsCheapAsAMove = 1, AddedComplexity = 1 in
def t2MOVi : T2sI<(outs GPR:$dst), (ins t2_so_imm:$src), IIC_iMOVi,
                   "mov", ".w\t$dst, $src",
                   [(set GPR:$dst, t2_so_imm:$src)]> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 0;
  let Inst{24-21} = 0b0010;
  let Inst{20} = ?; // The S bit.
  let Inst{19-16} = 0b1111; // Rn
  let Inst{15} = 0;
}

let isReMaterializable = 1, isAsCheapAsAMove = 1 in
def t2MOVi16 : T2I<(outs GPR:$dst), (ins i32imm:$src), IIC_iMOVi,
                   "movw", "\t$dst, $src",
                   [(set GPR:$dst, imm0_65535:$src)]> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-21} = 0b0010;
  let Inst{20} = 0; // The S bit.
  let Inst{15} = 0;
}

let Constraints = "$src = $dst" in
def t2MOVTi16 : T2I<(outs GPR:$dst), (ins GPR:$src, i32imm:$imm), IIC_iMOVi,
                    "movt", "\t$dst, $imm",
                    [(set GPR:$dst,
                          (or (and GPR:$src, 0xffff), lo16AllZero:$imm))]> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-21} = 0b0110;
  let Inst{20} = 0; // The S bit.
  let Inst{15} = 0;
}

def : T2Pat<(or GPR:$src, 0xffff0000), (t2MOVTi16 GPR:$src, 0xffff)>;

//===----------------------------------------------------------------------===//
//  Extend Instructions.
//

// Sign extenders

defm t2SXTB  : T2I_unary_rrot<0b100, "sxtb",
                              UnOpFrag<(sext_inreg node:$Src, i8)>>;
defm t2SXTH  : T2I_unary_rrot<0b000, "sxth",
                              UnOpFrag<(sext_inreg node:$Src, i16)>>;
defm t2SXTB16 : T2I_unary_rrot_DO<0b010, "sxtb16">;

defm t2SXTAB : T2I_bin_rrot<0b100, "sxtab",
                        BinOpFrag<(add node:$LHS, (sext_inreg node:$RHS, i8))>>;
defm t2SXTAH : T2I_bin_rrot<0b000, "sxtah",
                        BinOpFrag<(add node:$LHS, (sext_inreg node:$RHS,i16))>>;
defm t2SXTAB16 : T2I_bin_rrot_DO<0b010, "sxtab16">;

// TODO: SXT(A){B|H}16 - done for disassembly only

// Zero extenders

let AddedComplexity = 16 in {
defm t2UXTB   : T2I_unary_rrot<0b101, "uxtb",
                               UnOpFrag<(and node:$Src, 0x000000FF)>>;
defm t2UXTH   : T2I_unary_rrot<0b001, "uxth",
                               UnOpFrag<(and node:$Src, 0x0000FFFF)>>;
defm t2UXTB16 : T2I_unary_rrot_nw<0b011, "uxtb16",
                               UnOpFrag<(and node:$Src, 0x00FF00FF)>>;

def : T2Pat<(and (shl GPR:$Src, (i32 8)), 0xFF00FF),
            (t2UXTB16r_rot GPR:$Src, 24)>;
def : T2Pat<(and (srl GPR:$Src, (i32 8)), 0xFF00FF),
            (t2UXTB16r_rot GPR:$Src, 8)>;

defm t2UXTAB : T2I_bin_rrot<0b101, "uxtab",
                           BinOpFrag<(add node:$LHS, (and node:$RHS, 0x00FF))>>;
defm t2UXTAH : T2I_bin_rrot<0b001, "uxtah",
                           BinOpFrag<(add node:$LHS, (and node:$RHS, 0xFFFF))>>;
defm t2UXTAB16 : T2I_bin_rrot_DO<0b011, "uxtab16">;
}

//===----------------------------------------------------------------------===//
//  Arithmetic Instructions.
//

defm t2ADD  : T2I_bin_ii12rs<0b000, "add",
                             BinOpFrag<(add  node:$LHS, node:$RHS)>, 1>;
defm t2SUB  : T2I_bin_ii12rs<0b101, "sub",
                             BinOpFrag<(sub  node:$LHS, node:$RHS)>>;

// ADD and SUB with 's' bit set. No 12-bit immediate (T4) variants.
defm t2ADDS : T2I_bin_s_irs <0b1000, "add",
                             BinOpFrag<(addc node:$LHS, node:$RHS)>, 1>;
defm t2SUBS : T2I_bin_s_irs <0b1101, "sub",
                             BinOpFrag<(subc node:$LHS, node:$RHS)>>;

defm t2ADC  : T2I_adde_sube_irs<0b1010, "adc",
                          BinOpFrag<(adde_dead_carry node:$LHS, node:$RHS)>, 1>;
defm t2SBC  : T2I_adde_sube_irs<0b1011, "sbc",
                          BinOpFrag<(sube_dead_carry node:$LHS, node:$RHS)>>;
defm t2ADCS : T2I_adde_sube_s_irs<0b1010, "adc",
                          BinOpFrag<(adde_live_carry node:$LHS, node:$RHS)>, 1>;
defm t2SBCS : T2I_adde_sube_s_irs<0b1011, "sbc",
                          BinOpFrag<(sube_live_carry node:$LHS, node:$RHS)>>;

// RSB
defm t2RSB  : T2I_rbin_is   <0b1110, "rsb",
                             BinOpFrag<(sub  node:$LHS, node:$RHS)>>;
defm t2RSBS : T2I_rbin_s_is <0b1110, "rsb",
                             BinOpFrag<(subc node:$LHS, node:$RHS)>>;

// (sub X, imm) gets canonicalized to (add X, -imm).  Match this form.
let AddedComplexity = 1 in
def : T2Pat<(add       GPR:$src, imm0_255_neg:$imm),
            (t2SUBri   GPR:$src, imm0_255_neg:$imm)>;
def : T2Pat<(add       GPR:$src, t2_so_imm_neg:$imm),
            (t2SUBri   GPR:$src, t2_so_imm_neg:$imm)>;
def : T2Pat<(add       GPR:$src, imm0_4095_neg:$imm),
            (t2SUBri12 GPR:$src, imm0_4095_neg:$imm)>;

// Select Bytes -- for disassembly only

def t2SEL : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), NoItinerary, "sel",
                "\t$dst, $a, $b", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-24} = 0b010;
  let Inst{23} = 0b1;
  let Inst{22-20} = 0b010;
  let Inst{15-12} = 0b1111;
  let Inst{7} = 0b1;
  let Inst{6-4} = 0b000;
}

// A6.3.13, A6.3.14, A6.3.15 Parallel addition and subtraction (signed/unsigned)
// And Miscellaneous operations -- for disassembly only
class T2I_pam<bits<3> op22_20, bits<4> op7_4, string opc>
  : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), NoItinerary, opc,
        "\t$dst, $a, $b", [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0101;
  let Inst{22-20} = op22_20;
  let Inst{15-12} = 0b1111;
  let Inst{7-4} = op7_4;
}

// Saturating add/subtract -- for disassembly only

def t2QADD    : T2I_pam<0b000, 0b1000, "qadd">;
def t2QADD16  : T2I_pam<0b001, 0b0001, "qadd16">;
def t2QADD8   : T2I_pam<0b000, 0b0001, "qadd8">;
def t2QASX    : T2I_pam<0b010, 0b0001, "qasx">;
def t2QDADD   : T2I_pam<0b000, 0b1001, "qdadd">;
def t2QDSUB   : T2I_pam<0b000, 0b1011, "qdsub">;
def t2QSAX    : T2I_pam<0b110, 0b0001, "qsax">;
def t2QSUB    : T2I_pam<0b000, 0b1010, "qsub">;
def t2QSUB16  : T2I_pam<0b101, 0b0001, "qsub16">;
def t2QSUB8   : T2I_pam<0b100, 0b0001, "qsub8">;
def t2UQADD16 : T2I_pam<0b001, 0b0101, "uqadd16">;
def t2UQADD8  : T2I_pam<0b000, 0b0101, "uqadd8">;
def t2UQASX   : T2I_pam<0b010, 0b0101, "uqasx">;
def t2UQSAX   : T2I_pam<0b110, 0b0101, "uqsax">;
def t2UQSUB16 : T2I_pam<0b101, 0b0101, "uqsub16">;
def t2UQSUB8  : T2I_pam<0b100, 0b0101, "uqsub8">;

// Signed/Unsigned add/subtract -- for disassembly only

def t2SASX    : T2I_pam<0b010, 0b0000, "sasx">;
def t2SADD16  : T2I_pam<0b001, 0b0000, "sadd16">;
def t2SADD8   : T2I_pam<0b000, 0b0000, "sadd8">;
def t2SSAX    : T2I_pam<0b110, 0b0000, "ssax">;
def t2SSUB16  : T2I_pam<0b101, 0b0000, "ssub16">;
def t2SSUB8   : T2I_pam<0b100, 0b0000, "ssub8">;
def t2UASX    : T2I_pam<0b010, 0b0100, "uasx">;
def t2UADD16  : T2I_pam<0b001, 0b0100, "uadd16">;
def t2UADD8   : T2I_pam<0b000, 0b0100, "uadd8">;
def t2USAX    : T2I_pam<0b110, 0b0100, "usax">;
def t2USUB16  : T2I_pam<0b101, 0b0100, "usub16">;
def t2USUB8   : T2I_pam<0b100, 0b0100, "usub8">;

// Signed/Unsigned halving add/subtract -- for disassembly only

def t2SHASX   : T2I_pam<0b010, 0b0010, "shasx">;
def t2SHADD16 : T2I_pam<0b001, 0b0010, "shadd16">;
def t2SHADD8  : T2I_pam<0b000, 0b0010, "shadd8">;
def t2SHSAX   : T2I_pam<0b110, 0b0010, "shsax">;
def t2SHSUB16 : T2I_pam<0b101, 0b0010, "shsub16">;
def t2SHSUB8  : T2I_pam<0b100, 0b0010, "shsub8">;
def t2UHASX   : T2I_pam<0b010, 0b0110, "uhasx">;
def t2UHADD16 : T2I_pam<0b001, 0b0110, "uhadd16">;
def t2UHADD8  : T2I_pam<0b000, 0b0110, "uhadd8">;
def t2UHSAX   : T2I_pam<0b110, 0b0110, "uhsax">;
def t2UHSUB16 : T2I_pam<0b101, 0b0110, "uhsub16">;
def t2UHSUB8  : T2I_pam<0b100, 0b0110, "uhsub8">;

// Unsigned Sum of Absolute Differences [and Accumulate] -- for disassembly only

def t2USAD8   : T2I_mac<0, 0b111, 0b0000, (outs GPR:$dst), (ins GPR:$a, GPR:$b),
                        NoItinerary, "usad8", "\t$dst, $a, $b", []> {
  let Inst{15-12} = 0b1111;
}
def t2USADA8  : T2I_mac<0, 0b111, 0b0000, (outs GPR:$dst),
                        (ins GPR:$a, GPR:$b, GPR:$acc), NoItinerary, "usada8",
                        "\t$dst, $a, $b, $acc", []>;

// Signed/Unsigned saturate -- for disassembly only

def t2SSATlsl : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos,GPR:$a,i32imm:$shamt),
                    NoItinerary, "ssat", "\t$dst, $bit_pos, $a, lsl $shamt",
                    [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1100;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 0;        // sh = '0'
}

def t2SSATasr : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos,GPR:$a,i32imm:$shamt),
                    NoItinerary, "ssat", "\t$dst, $bit_pos, $a, asr $shamt",
                    [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1100;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 1;        // sh = '1'
}

def t2SSAT16 : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos, GPR:$a), NoItinerary,
                   "ssat16", "\t$dst, $bit_pos, $a",
                   [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1100;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 1;        // sh = '1'
  let Inst{14-12} = 0b000; // imm3 = '000'
  let Inst{7-6} = 0b00;    // imm2 = '00'
}

def t2USATlsl : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos,GPR:$a,i32imm:$shamt),
                     NoItinerary, "usat", "\t$dst, $bit_pos, $a, lsl $shamt",
                     [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1110;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 0;        // sh = '0'
}

def t2USATasr : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos,GPR:$a,i32imm:$shamt),
                     NoItinerary, "usat", "\t$dst, $bit_pos, $a, asr $shamt",
                     [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1110;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 1;        // sh = '1'
}

def t2USAT16 : T2I<(outs GPR:$dst), (ins i32imm:$bit_pos, GPR:$a), NoItinerary,
                   "usat16", "\t$dst, $bit_pos, $a",
                   [/* For disassembly only; pattern left blank */]> {
  let Inst{31-27} = 0b11110;
  let Inst{25-22} = 0b1110;
  let Inst{20} = 0;
  let Inst{15} = 0;
  let Inst{21} = 1;        // sh = '1'
  let Inst{14-12} = 0b000; // imm3 = '000'
  let Inst{7-6} = 0b00;    // imm2 = '00'
}

//===----------------------------------------------------------------------===//
//  Shift and rotate Instructions.
//

defm t2LSL  : T2I_sh_ir<0b00, "lsl", BinOpFrag<(shl  node:$LHS, node:$RHS)>>;
defm t2LSR  : T2I_sh_ir<0b01, "lsr", BinOpFrag<(srl  node:$LHS, node:$RHS)>>;
defm t2ASR  : T2I_sh_ir<0b10, "asr", BinOpFrag<(sra  node:$LHS, node:$RHS)>>;
defm t2ROR  : T2I_sh_ir<0b11, "ror", BinOpFrag<(rotr node:$LHS, node:$RHS)>>;

let Uses = [CPSR] in {
def t2MOVrx : T2sI<(outs GPR:$dst), (ins GPR:$src), IIC_iMOVsi,
                   "rrx", "\t$dst, $src",
                   [(set GPR:$dst, (ARMrrx GPR:$src))]> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b01;
  let Inst{24-21} = 0b0010;
  let Inst{20} = ?; // The S bit.
  let Inst{19-16} = 0b1111; // Rn
  let Inst{14-12} = 0b000;
  let Inst{7-4} = 0b0011;
}
}

let Defs = [CPSR] in {
def t2MOVsrl_flag : T2XI<(outs GPR:$dst), (ins GPR:$src), IIC_iMOVsi,
                         "lsrs.w\t$dst, $src, #1",
                         [(set GPR:$dst, (ARMsrl_flag GPR:$src))]> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b01;
  let Inst{24-21} = 0b0010;
  let Inst{20} = 1; // The S bit.
  let Inst{19-16} = 0b1111; // Rn
  let Inst{5-4} = 0b01; // Shift type.
  // Shift amount = Inst{14-12:7-6} = 1.
  let Inst{14-12} = 0b000;
  let Inst{7-6} = 0b01;
}
def t2MOVsra_flag : T2XI<(outs GPR:$dst), (ins GPR:$src), IIC_iMOVsi,
                         "asrs.w\t$dst, $src, #1",
                         [(set GPR:$dst, (ARMsra_flag GPR:$src))]> {
  let Inst{31-27} = 0b11101;
  let Inst{26-25} = 0b01;
  let Inst{24-21} = 0b0010;
  let Inst{20} = 1; // The S bit.
  let Inst{19-16} = 0b1111; // Rn
  let Inst{5-4} = 0b10; // Shift type.
  // Shift amount = Inst{14-12:7-6} = 1.
  let Inst{14-12} = 0b000;
  let Inst{7-6} = 0b01;
}
}

//===----------------------------------------------------------------------===//
//  Bitwise Instructions.
//

defm t2AND  : T2I_bin_w_irs<0b0000, "and",
                            BinOpFrag<(and node:$LHS, node:$RHS)>, 1>;
defm t2ORR  : T2I_bin_w_irs<0b0010, "orr",
                            BinOpFrag<(or  node:$LHS, node:$RHS)>, 1>;
defm t2EOR  : T2I_bin_w_irs<0b0100, "eor",
                            BinOpFrag<(xor node:$LHS, node:$RHS)>, 1>;

defm t2BIC  : T2I_bin_w_irs<0b0001, "bic",
                            BinOpFrag<(and node:$LHS, (not node:$RHS))>>;

let Constraints = "$src = $dst" in
def t2BFC : T2I<(outs GPR:$dst), (ins GPR:$src, bf_inv_mask_imm:$imm),
                IIC_iUNAsi, "bfc", "\t$dst, $imm",
                [(set GPR:$dst, (and GPR:$src, bf_inv_mask_imm:$imm))]> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-20} = 0b10110;
  let Inst{19-16} = 0b1111; // Rn
  let Inst{15} = 0;
}

def t2SBFX : T2I<(outs GPR:$dst), (ins GPR:$src, imm0_31:$lsb, imm0_31:$width),
                 IIC_iALUi, "sbfx", "\t$dst, $src, $lsb, $width", []> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-20} = 0b10100;
  let Inst{15} = 0;
}

def t2UBFX : T2I<(outs GPR:$dst), (ins GPR:$src, imm0_31:$lsb, imm0_31:$width),
                 IIC_iALUi, "ubfx", "\t$dst, $src, $lsb, $width", []> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-20} = 0b11100;
  let Inst{15} = 0;
}

// A8.6.18  BFI - Bitfield insert (Encoding T1)
// Added for disassembler with the pattern field purposely left blank.
// FIXME: Utilize this instruction in codgen.
def t2BFI : T2I<(outs GPR:$dst), (ins GPR:$src, imm0_31:$lsb, imm0_31:$width),
                IIC_iALUi, "bfi", "\t$dst, $src, $lsb, $width", []> {
  let Inst{31-27} = 0b11110;
  let Inst{25} = 1;
  let Inst{24-20} = 0b10110;
  let Inst{15} = 0;
}

defm t2ORN  : T2I_bin_irs<0b0011, "orn", BinOpFrag<(or  node:$LHS,
                          (not node:$RHS))>>;

// Prefer over of t2EORri ra, rb, -1 because mvn has 16-bit version
let AddedComplexity = 1 in
defm t2MVN  : T2I_un_irs <0b0011, "mvn", UnOpFrag<(not node:$Src)>, 1, 1>;


def : T2Pat<(and     GPR:$src, t2_so_imm_not:$imm),
            (t2BICri GPR:$src, t2_so_imm_not:$imm)>;

// FIXME: Disable this pattern on Darwin to workaround an assembler bug.
def : T2Pat<(or      GPR:$src, t2_so_imm_not:$imm),
            (t2ORNri GPR:$src, t2_so_imm_not:$imm)>,
            Requires<[IsThumb2]>;

def : T2Pat<(t2_so_imm_not:$src),
            (t2MVNi t2_so_imm_not:$src)>;

//===----------------------------------------------------------------------===//
//  Multiply Instructions.
//
let isCommutable = 1 in
def t2MUL: T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
                "mul", "\t$dst, $a, $b",
                [(set GPR:$dst, (mul GPR:$a, GPR:$b))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b000;
  let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
  let Inst{7-4} = 0b0000; // Multiply
}

def t2MLA: T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
		"mla", "\t$dst, $a, $b, $c",
		[(set GPR:$dst, (add (mul GPR:$a, GPR:$b), GPR:$c))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b000;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0000; // Multiply
}

def t2MLS: T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
		"mls", "\t$dst, $a, $b, $c",
                [(set GPR:$dst, (sub GPR:$c, (mul GPR:$a, GPR:$b)))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b000;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0001; // Multiply and Subtract
}

// Extra precision multiplies with low / high results
let neverHasSideEffects = 1 in {
let isCommutable = 1 in {
def t2SMULL : T2I<(outs GPR:$ldst, GPR:$hdst), (ins GPR:$a, GPR:$b), IIC_iMUL64,
                   "smull", "\t$ldst, $hdst, $a, $b", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0111;
  let Inst{22-20} = 0b000;
  let Inst{7-4} = 0b0000;
}

def t2UMULL : T2I<(outs GPR:$ldst, GPR:$hdst), (ins GPR:$a, GPR:$b), IIC_iMUL64,
                   "umull", "\t$ldst, $hdst, $a, $b", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0111;
  let Inst{22-20} = 0b010;
  let Inst{7-4} = 0b0000;
}
} // isCommutable

// Multiply + accumulate
def t2SMLAL : T2I<(outs GPR:$ldst, GPR:$hdst), (ins GPR:$a, GPR:$b), IIC_iMAC64,
                  "smlal", "\t$ldst, $hdst, $a, $b", []>{
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0111;
  let Inst{22-20} = 0b100;
  let Inst{7-4} = 0b0000;
}

def t2UMLAL : T2I<(outs GPR:$ldst, GPR:$hdst), (ins GPR:$a, GPR:$b), IIC_iMAC64,
                  "umlal", "\t$ldst, $hdst, $a, $b", []>{
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0111;
  let Inst{22-20} = 0b110;
  let Inst{7-4} = 0b0000;
}

def t2UMAAL : T2I<(outs GPR:$ldst, GPR:$hdst), (ins GPR:$a, GPR:$b), IIC_iMAC64,
                  "umaal", "\t$ldst, $hdst, $a, $b", []>{
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0111;
  let Inst{22-20} = 0b110;
  let Inst{7-4} = 0b0110;
}
} // neverHasSideEffects

// Rounding variants of the below included for disassembly only

// Most significant word multiply
def t2SMMUL : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
                  "smmul", "\t$dst, $a, $b",
                  [(set GPR:$dst, (mulhs GPR:$a, GPR:$b))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b101;
  let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
  let Inst{7-4} = 0b0000; // No Rounding (Inst{4} = 0)
}

def t2SMMULR : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
                  "smmulr", "\t$dst, $a, $b", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b101;
  let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
  let Inst{7-4} = 0b0001; // Rounding (Inst{4} = 1)
}

def t2SMMLA : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
                  "smmla", "\t$dst, $a, $b, $c",
                  [(set GPR:$dst, (add (mulhs GPR:$a, GPR:$b), GPR:$c))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b101;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0000; // No Rounding (Inst{4} = 0)
}

def t2SMMLAR : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
                  "smmlar", "\t$dst, $a, $b, $c", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b101;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0001; // Rounding (Inst{4} = 1)
}

def t2SMMLS : T2I <(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
                   "smmls", "\t$dst, $a, $b, $c",
                   [(set GPR:$dst, (sub GPR:$c, (mulhs GPR:$a, GPR:$b)))]> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b110;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0000; // No Rounding (Inst{4} = 0)
}

def t2SMMLSR : T2I <(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c), IIC_iMAC32,
                   "smmlsr", "\t$dst, $a, $b, $c", []> {
  let Inst{31-27} = 0b11111;
  let Inst{26-23} = 0b0110;
  let Inst{22-20} = 0b110;
  let Inst{15-12} = {?, ?, ?, ?}; // Ra
  let Inst{7-4} = 0b0001; // Rounding (Inst{4} = 1)
}

multiclass T2I_smul<string opc, PatFrag opnode> {
  def BB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
              !strconcat(opc, "bb"), "\t$dst, $a, $b",
              [(set GPR:$dst, (opnode (sext_inreg GPR:$a, i16),
                                      (sext_inreg GPR:$b, i16)))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b00;
  }

  def BT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
              !strconcat(opc, "bt"), "\t$dst, $a, $b",
              [(set GPR:$dst, (opnode (sext_inreg GPR:$a, i16),
                                      (sra GPR:$b, (i32 16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b01;
  }

  def TB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
              !strconcat(opc, "tb"), "\t$dst, $a, $b",
              [(set GPR:$dst, (opnode (sra GPR:$a, (i32 16)),
                                      (sext_inreg GPR:$b, i16)))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b10;
  }

  def TT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL32,
              !strconcat(opc, "tt"), "\t$dst, $a, $b",
              [(set GPR:$dst, (opnode (sra GPR:$a, (i32 16)),
                                      (sra GPR:$b, (i32 16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b11;
  }

  def WB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL16,
              !strconcat(opc, "wb"), "\t$dst, $a, $b",
              [(set GPR:$dst, (sra (opnode GPR:$a,
                                    (sext_inreg GPR:$b, i16)), (i32 16)))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b011;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b00;
  }

  def WT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b), IIC_iMUL16,
              !strconcat(opc, "wt"), "\t$dst, $a, $b",
              [(set GPR:$dst, (sra (opnode GPR:$a,
                                    (sra GPR:$b, (i32 16))), (i32 16)))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b011;
    let Inst{15-12} = 0b1111; // Ra = 0b1111 (no accumulate)
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b01;
  }
}


multiclass T2I_smla<string opc, PatFrag opnode> {
  def BB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
              !strconcat(opc, "bb"), "\t$dst, $a, $b, $acc",
              [(set GPR:$dst, (add GPR:$acc,
                               (opnode (sext_inreg GPR:$a, i16),
                                       (sext_inreg GPR:$b, i16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b00;
  }

  def BT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
             !strconcat(opc, "bt"), "\t$dst, $a, $b, $acc",
             [(set GPR:$dst, (add GPR:$acc, (opnode (sext_inreg GPR:$a, i16),
                                                   (sra GPR:$b, (i32 16)))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b01;
  }

  def TB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
              !strconcat(opc, "tb"), "\t$dst, $a, $b, $acc",
              [(set GPR:$dst, (add GPR:$acc, (opnode (sra GPR:$a, (i32 16)),
                                                 (sext_inreg GPR:$b, i16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b10;
  }

  def TT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
              !strconcat(opc, "tt"), "\t$dst, $a, $b, $acc",
             [(set GPR:$dst, (add GPR:$acc, (opnode (sra GPR:$a, (i32 16)),
                                                   (sra GPR:$b, (i32 16)))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b001;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b11;
  }

  def WB : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
              !strconcat(opc, "wb"), "\t$dst, $a, $b, $acc",
              [(set GPR:$dst, (add GPR:$acc, (sra (opnode GPR:$a,
                                      (sext_inreg GPR:$b, i16)), (i32 16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b011;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b00;
  }

  def WT : T2I<(outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$acc), IIC_iMAC16,
              !strconcat(opc, "wt"), "\t$dst, $a, $b, $acc",
              [(set GPR:$dst, (add GPR:$acc, (sra (opnode GPR:$a,
                                        (sra GPR:$b, (i32 16))), (i32 16))))]> {
    let Inst{31-27} = 0b11111;
    let Inst{26-23} = 0b0110;
    let Inst{22-20} = 0b011;
    let Inst{15-12} = {?, ?, ?, ?}; // Ra
    let Inst{7-6} = 0b00;
    let Inst{5-4} = 0b01;
  }
}

defm t2SMUL : T2I_smul<"smul", BinOpFrag<(mul node:$LHS, node:$RHS)>>;
defm t2SMLA : T2I_smla<"smla", BinOpFrag<(mul node:$LHS, node:$RHS)>>;

// Halfword multiple accumulate long: SMLAL<x><y> -- for disassembly only
def t2SMLALBB : T2I_mac<1, 0b100, 0b1000, (outs GPR:$ldst,GPR:$hdst),
           (ins GPR:$a,GPR:$b), IIC_iMAC64, "smlalbb", "\t$ldst, $hdst, $a, $b",
           [/* For disassembly only; pattern left blank */]>;
def t2SMLALBT : T2I_mac<1, 0b100, 0b1001, (outs GPR:$ldst,GPR:$hdst),
           (ins GPR:$a,GPR:$b), IIC_iMAC64, "smlalbt", "\t$ldst, $hdst, $a, $b",
           [/* For disassembly only; pattern left blank */]>;
def t2SMLALTB : T2I_mac<1, 0b100, 0b1010, (outs GPR:$ldst,GPR:$hdst),
           (ins GPR:$a,GPR:$b), IIC_iMAC64, "smlaltb", "\t$ldst, $hdst, $a, $b",
           [/* For disassembly only; pattern left blank */]>;
def t2SMLALTT : T2I_mac<1, 0b100, 0b1011, (outs GPR:$ldst,GPR:$hdst),
           (ins GPR:$a,GPR:$b), IIC_iMAC64, "smlaltt", "\t$ldst, $hdst, $a, $b",
           [/* For disassembly only; pattern left blank */]>;

// Dual halfword multiple: SMUAD, SMUSD, SMLAD, SMLSD, SMLALD, SMLSLD
// These are for disassembly only.

def t2SMUAD   : T2I_mac<0, 0b010, 0b0000, (outs GPR:$dst), (ins GPR:$a, GPR:$b),
                        IIC_iMAC32, "smuad", "\t$dst, $a, $b", []> {
  let Inst{15-12} = 0b1111;
}
def t2SMUADX  : T2I_mac<0, 0b010, 0b0001, (outs GPR:$dst), (ins GPR:$a, GPR:$b),
                        IIC_iMAC32, "smuadx", "\t$dst, $a, $b", []> {
  let Inst{15-12} = 0b1111;
}
def t2SMUSD   : T2I_mac<0, 0b100, 0b0000, (outs GPR:$dst), (ins GPR:$a, GPR:$b),
                        IIC_iMAC32, "smusd", "\t$dst, $a, $b", []> {
  let Inst{15-12} = 0b1111;
}
def t2SMUSDX  : T2I_mac<0, 0b100, 0b0001, (outs GPR:$dst), (ins GPR:$a, GPR:$b),
                        IIC_iMAC32, "smusdx", "\t$dst, $a, $b", []> {
  let Inst{15-12} = 0b1111;