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      1 //==-- AArch64InstPrinter.cpp - Convert AArch64 MCInst to assembly syntax --==//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This class prints an AArch64 MCInst to a .s file.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "AArch64InstPrinter.h"
     15 #include "MCTargetDesc/AArch64AddressingModes.h"
     16 #include "Utils/AArch64BaseInfo.h"
     17 #include "llvm/ADT/STLExtras.h"
     18 #include "llvm/ADT/StringExtras.h"
     19 #include "llvm/MC/MCExpr.h"
     20 #include "llvm/MC/MCInst.h"
     21 #include "llvm/MC/MCRegisterInfo.h"
     22 #include "llvm/Support/Format.h"
     23 #include "llvm/Support/raw_ostream.h"
     24 using namespace llvm;
     25 
     26 #define DEBUG_TYPE "asm-printer"
     27 
     28 #define GET_INSTRUCTION_NAME
     29 #define PRINT_ALIAS_INSTR
     30 #include "AArch64GenAsmWriter.inc"
     31 #define GET_INSTRUCTION_NAME
     32 #define PRINT_ALIAS_INSTR
     33 #include "AArch64GenAsmWriter1.inc"
     34 
     35 AArch64InstPrinter::AArch64InstPrinter(const MCAsmInfo &MAI,
     36                                        const MCInstrInfo &MII,
     37                                        const MCRegisterInfo &MRI)
     38     : MCInstPrinter(MAI, MII, MRI) {}
     39 
     40 AArch64AppleInstPrinter::AArch64AppleInstPrinter(const MCAsmInfo &MAI,
     41                                                  const MCInstrInfo &MII,
     42                                                  const MCRegisterInfo &MRI)
     43     : AArch64InstPrinter(MAI, MII, MRI) {}
     44 
     45 void AArch64InstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
     46   // This is for .cfi directives.
     47   OS << getRegisterName(RegNo);
     48 }
     49 
     50 void AArch64InstPrinter::printInst(const MCInst *MI, raw_ostream &O,
     51                                    StringRef Annot,
     52                                    const MCSubtargetInfo &STI) {
     53   // Check for special encodings and print the canonical alias instead.
     54 
     55   unsigned Opcode = MI->getOpcode();
     56 
     57   if (Opcode == AArch64::SYSxt)
     58     if (printSysAlias(MI, STI, O)) {
     59       printAnnotation(O, Annot);
     60       return;
     61     }
     62 
     63   // SBFM/UBFM should print to a nicer aliased form if possible.
     64   if (Opcode == AArch64::SBFMXri || Opcode == AArch64::SBFMWri ||
     65       Opcode == AArch64::UBFMXri || Opcode == AArch64::UBFMWri) {
     66     const MCOperand &Op0 = MI->getOperand(0);
     67     const MCOperand &Op1 = MI->getOperand(1);
     68     const MCOperand &Op2 = MI->getOperand(2);
     69     const MCOperand &Op3 = MI->getOperand(3);
     70 
     71     bool IsSigned = (Opcode == AArch64::SBFMXri || Opcode == AArch64::SBFMWri);
     72     bool Is64Bit = (Opcode == AArch64::SBFMXri || Opcode == AArch64::UBFMXri);
     73     if (Op2.isImm() && Op2.getImm() == 0 && Op3.isImm()) {
     74       const char *AsmMnemonic = nullptr;
     75 
     76       switch (Op3.getImm()) {
     77       default:
     78         break;
     79       case 7:
     80         if (IsSigned)
     81           AsmMnemonic = "sxtb";
     82         else if (!Is64Bit)
     83           AsmMnemonic = "uxtb";
     84         break;
     85       case 15:
     86         if (IsSigned)
     87           AsmMnemonic = "sxth";
     88         else if (!Is64Bit)
     89           AsmMnemonic = "uxth";
     90         break;
     91       case 31:
     92         // *xtw is only valid for signed 64-bit operations.
     93         if (Is64Bit && IsSigned)
     94           AsmMnemonic = "sxtw";
     95         break;
     96       }
     97 
     98       if (AsmMnemonic) {
     99         O << '\t' << AsmMnemonic << '\t' << getRegisterName(Op0.getReg())
    100           << ", " << getRegisterName(getWRegFromXReg(Op1.getReg()));
    101         printAnnotation(O, Annot);
    102         return;
    103       }
    104     }
    105 
    106     // All immediate shifts are aliases, implemented using the Bitfield
    107     // instruction. In all cases the immediate shift amount shift must be in
    108     // the range 0 to (reg.size -1).
    109     if (Op2.isImm() && Op3.isImm()) {
    110       const char *AsmMnemonic = nullptr;
    111       int shift = 0;
    112       int64_t immr = Op2.getImm();
    113       int64_t imms = Op3.getImm();
    114       if (Opcode == AArch64::UBFMWri && imms != 0x1F && ((imms + 1) == immr)) {
    115         AsmMnemonic = "lsl";
    116         shift = 31 - imms;
    117       } else if (Opcode == AArch64::UBFMXri && imms != 0x3f &&
    118                  ((imms + 1 == immr))) {
    119         AsmMnemonic = "lsl";
    120         shift = 63 - imms;
    121       } else if (Opcode == AArch64::UBFMWri && imms == 0x1f) {
    122         AsmMnemonic = "lsr";
    123         shift = immr;
    124       } else if (Opcode == AArch64::UBFMXri && imms == 0x3f) {
    125         AsmMnemonic = "lsr";
    126         shift = immr;
    127       } else if (Opcode == AArch64::SBFMWri && imms == 0x1f) {
    128         AsmMnemonic = "asr";
    129         shift = immr;
    130       } else if (Opcode == AArch64::SBFMXri && imms == 0x3f) {
    131         AsmMnemonic = "asr";
    132         shift = immr;
    133       }
    134       if (AsmMnemonic) {
    135         O << '\t' << AsmMnemonic << '\t' << getRegisterName(Op0.getReg())
    136           << ", " << getRegisterName(Op1.getReg()) << ", #" << shift;
    137         printAnnotation(O, Annot);
    138         return;
    139       }
    140     }
    141 
    142     // SBFIZ/UBFIZ aliases
    143     if (Op2.getImm() > Op3.getImm()) {
    144       O << '\t' << (IsSigned ? "sbfiz" : "ubfiz") << '\t'
    145         << getRegisterName(Op0.getReg()) << ", " << getRegisterName(Op1.getReg())
    146         << ", #" << (Is64Bit ? 64 : 32) - Op2.getImm() << ", #" << Op3.getImm() + 1;
    147       printAnnotation(O, Annot);
    148       return;
    149     }
    150 
    151     // Otherwise SBFX/UBFX is the preferred form
    152     O << '\t' << (IsSigned ? "sbfx" : "ubfx") << '\t'
    153       << getRegisterName(Op0.getReg()) << ", " << getRegisterName(Op1.getReg())
    154       << ", #" << Op2.getImm() << ", #" << Op3.getImm() - Op2.getImm() + 1;
    155     printAnnotation(O, Annot);
    156     return;
    157   }
    158 
    159   if (Opcode == AArch64::BFMXri || Opcode == AArch64::BFMWri) {
    160     const MCOperand &Op0 = MI->getOperand(0); // Op1 == Op0
    161     const MCOperand &Op2 = MI->getOperand(2);
    162     int ImmR = MI->getOperand(3).getImm();
    163     int ImmS = MI->getOperand(4).getImm();
    164 
    165     if ((Op2.getReg() == AArch64::WZR || Op2.getReg() == AArch64::XZR) &&
    166         (ImmR == 0 || ImmS < ImmR)) {
    167       // BFC takes precedence over its entire range, sligtly differently to BFI.
    168       int BitWidth = Opcode == AArch64::BFMXri ? 64 : 32;
    169       int LSB = (BitWidth - ImmR) % BitWidth;
    170       int Width = ImmS + 1;
    171 
    172       O << "\tbfc\t" << getRegisterName(Op0.getReg())
    173         << ", #" << LSB << ", #" << Width;
    174       printAnnotation(O, Annot);
    175       return;
    176     } else if (ImmS < ImmR) {
    177       // BFI alias
    178       int BitWidth = Opcode == AArch64::BFMXri ? 64 : 32;
    179       int LSB = (BitWidth - ImmR) % BitWidth;
    180       int Width = ImmS + 1;
    181 
    182       O << "\tbfi\t" << getRegisterName(Op0.getReg()) << ", "
    183         << getRegisterName(Op2.getReg()) << ", #" << LSB << ", #" << Width;
    184       printAnnotation(O, Annot);
    185       return;
    186     }
    187 
    188     int LSB = ImmR;
    189     int Width = ImmS - ImmR + 1;
    190     // Otherwise BFXIL the preferred form
    191     O << "\tbfxil\t"
    192       << getRegisterName(Op0.getReg()) << ", " << getRegisterName(Op2.getReg())
    193       << ", #" << LSB << ", #" << Width;
    194     printAnnotation(O, Annot);
    195     return;
    196   }
    197 
    198   // Symbolic operands for MOVZ, MOVN and MOVK already imply a shift
    199   // (e.g. :gottprel_g1: is always going to be "lsl #16") so it should not be
    200   // printed.
    201   if ((Opcode == AArch64::MOVZXi || Opcode == AArch64::MOVZWi ||
    202        Opcode == AArch64::MOVNXi || Opcode == AArch64::MOVNWi) &&
    203       MI->getOperand(1).isExpr()) {
    204     if (Opcode == AArch64::MOVZXi || Opcode == AArch64::MOVZWi)
    205       O << "\tmovz\t";
    206     else
    207       O << "\tmovn\t";
    208 
    209     O << getRegisterName(MI->getOperand(0).getReg()) << ", #";
    210     MI->getOperand(1).getExpr()->print(O, &MAI);
    211     return;
    212   }
    213 
    214   if ((Opcode == AArch64::MOVKXi || Opcode == AArch64::MOVKWi) &&
    215       MI->getOperand(2).isExpr()) {
    216     O << "\tmovk\t" << getRegisterName(MI->getOperand(0).getReg()) << ", #";
    217     MI->getOperand(2).getExpr()->print(O, &MAI);
    218     return;
    219   }
    220 
    221   if (!printAliasInstr(MI, STI, O))
    222     printInstruction(MI, STI, O);
    223 
    224   printAnnotation(O, Annot);
    225 }
    226 
    227 static bool isTblTbxInstruction(unsigned Opcode, StringRef &Layout,
    228                                 bool &IsTbx) {
    229   switch (Opcode) {
    230   case AArch64::TBXv8i8One:
    231   case AArch64::TBXv8i8Two:
    232   case AArch64::TBXv8i8Three:
    233   case AArch64::TBXv8i8Four:
    234     IsTbx = true;
    235     Layout = ".8b";
    236     return true;
    237   case AArch64::TBLv8i8One:
    238   case AArch64::TBLv8i8Two:
    239   case AArch64::TBLv8i8Three:
    240   case AArch64::TBLv8i8Four:
    241     IsTbx = false;
    242     Layout = ".8b";
    243     return true;
    244   case AArch64::TBXv16i8One:
    245   case AArch64::TBXv16i8Two:
    246   case AArch64::TBXv16i8Three:
    247   case AArch64::TBXv16i8Four:
    248     IsTbx = true;
    249     Layout = ".16b";
    250     return true;
    251   case AArch64::TBLv16i8One:
    252   case AArch64::TBLv16i8Two:
    253   case AArch64::TBLv16i8Three:
    254   case AArch64::TBLv16i8Four:
    255     IsTbx = false;
    256     Layout = ".16b";
    257     return true;
    258   default:
    259     return false;
    260   }
    261 }
    262 
    263 struct LdStNInstrDesc {
    264   unsigned Opcode;
    265   const char *Mnemonic;
    266   const char *Layout;
    267   int ListOperand;
    268   bool HasLane;
    269   int NaturalOffset;
    270 };
    271 
    272 static const LdStNInstrDesc LdStNInstInfo[] = {
    273   { AArch64::LD1i8,             "ld1",  ".b",     1, true,  0  },
    274   { AArch64::LD1i16,            "ld1",  ".h",     1, true,  0  },
    275   { AArch64::LD1i32,            "ld1",  ".s",     1, true,  0  },
    276   { AArch64::LD1i64,            "ld1",  ".d",     1, true,  0  },
    277   { AArch64::LD1i8_POST,        "ld1",  ".b",     2, true,  1  },
    278   { AArch64::LD1i16_POST,       "ld1",  ".h",     2, true,  2  },
    279   { AArch64::LD1i32_POST,       "ld1",  ".s",     2, true,  4  },
    280   { AArch64::LD1i64_POST,       "ld1",  ".d",     2, true,  8  },
    281   { AArch64::LD1Rv16b,          "ld1r", ".16b",   0, false, 0  },
    282   { AArch64::LD1Rv8h,           "ld1r", ".8h",    0, false, 0  },
    283   { AArch64::LD1Rv4s,           "ld1r", ".4s",    0, false, 0  },
    284   { AArch64::LD1Rv2d,           "ld1r", ".2d",    0, false, 0  },
    285   { AArch64::LD1Rv8b,           "ld1r", ".8b",    0, false, 0  },
    286   { AArch64::LD1Rv4h,           "ld1r", ".4h",    0, false, 0  },
    287   { AArch64::LD1Rv2s,           "ld1r", ".2s",    0, false, 0  },
    288   { AArch64::LD1Rv1d,           "ld1r", ".1d",    0, false, 0  },
    289   { AArch64::LD1Rv16b_POST,     "ld1r", ".16b",   1, false, 1  },
    290   { AArch64::LD1Rv8h_POST,      "ld1r", ".8h",    1, false, 2  },
    291   { AArch64::LD1Rv4s_POST,      "ld1r", ".4s",    1, false, 4  },
    292   { AArch64::LD1Rv2d_POST,      "ld1r", ".2d",    1, false, 8  },
    293   { AArch64::LD1Rv8b_POST,      "ld1r", ".8b",    1, false, 1  },
    294   { AArch64::LD1Rv4h_POST,      "ld1r", ".4h",    1, false, 2  },
    295   { AArch64::LD1Rv2s_POST,      "ld1r", ".2s",    1, false, 4  },
    296   { AArch64::LD1Rv1d_POST,      "ld1r", ".1d",    1, false, 8  },
    297   { AArch64::LD1Onev16b,        "ld1",  ".16b",   0, false, 0  },
    298   { AArch64::LD1Onev8h,         "ld1",  ".8h",    0, false, 0  },
    299   { AArch64::LD1Onev4s,         "ld1",  ".4s",    0, false, 0  },
    300   { AArch64::LD1Onev2d,         "ld1",  ".2d",    0, false, 0  },
    301   { AArch64::LD1Onev8b,         "ld1",  ".8b",    0, false, 0  },
    302   { AArch64::LD1Onev4h,         "ld1",  ".4h",    0, false, 0  },
    303   { AArch64::LD1Onev2s,         "ld1",  ".2s",    0, false, 0  },
    304   { AArch64::LD1Onev1d,         "ld1",  ".1d",    0, false, 0  },
    305   { AArch64::LD1Onev16b_POST,   "ld1",  ".16b",   1, false, 16 },
    306   { AArch64::LD1Onev8h_POST,    "ld1",  ".8h",    1, false, 16 },
    307   { AArch64::LD1Onev4s_POST,    "ld1",  ".4s",    1, false, 16 },
    308   { AArch64::LD1Onev2d_POST,    "ld1",  ".2d",    1, false, 16 },
    309   { AArch64::LD1Onev8b_POST,    "ld1",  ".8b",    1, false, 8  },
    310   { AArch64::LD1Onev4h_POST,    "ld1",  ".4h",    1, false, 8  },
    311   { AArch64::LD1Onev2s_POST,    "ld1",  ".2s",    1, false, 8  },
    312   { AArch64::LD1Onev1d_POST,    "ld1",  ".1d",    1, false, 8  },
    313   { AArch64::LD1Twov16b,        "ld1",  ".16b",   0, false, 0  },
    314   { AArch64::LD1Twov8h,         "ld1",  ".8h",    0, false, 0  },
    315   { AArch64::LD1Twov4s,         "ld1",  ".4s",    0, false, 0  },
    316   { AArch64::LD1Twov2d,         "ld1",  ".2d",    0, false, 0  },
    317   { AArch64::LD1Twov8b,         "ld1",  ".8b",    0, false, 0  },
    318   { AArch64::LD1Twov4h,         "ld1",  ".4h",    0, false, 0  },
    319   { AArch64::LD1Twov2s,         "ld1",  ".2s",    0, false, 0  },
    320   { AArch64::LD1Twov1d,         "ld1",  ".1d",    0, false, 0  },
    321   { AArch64::LD1Twov16b_POST,   "ld1",  ".16b",   1, false, 32 },
    322   { AArch64::LD1Twov8h_POST,    "ld1",  ".8h",    1, false, 32 },
    323   { AArch64::LD1Twov4s_POST,    "ld1",  ".4s",    1, false, 32 },
    324   { AArch64::LD1Twov2d_POST,    "ld1",  ".2d",    1, false, 32 },
    325   { AArch64::LD1Twov8b_POST,    "ld1",  ".8b",    1, false, 16 },
    326   { AArch64::LD1Twov4h_POST,    "ld1",  ".4h",    1, false, 16 },
    327   { AArch64::LD1Twov2s_POST,    "ld1",  ".2s",    1, false, 16 },
    328   { AArch64::LD1Twov1d_POST,    "ld1",  ".1d",    1, false, 16 },
    329   { AArch64::LD1Threev16b,      "ld1",  ".16b",   0, false, 0  },
    330   { AArch64::LD1Threev8h,       "ld1",  ".8h",    0, false, 0  },
    331   { AArch64::LD1Threev4s,       "ld1",  ".4s",    0, false, 0  },
    332   { AArch64::LD1Threev2d,       "ld1",  ".2d",    0, false, 0  },
    333   { AArch64::LD1Threev8b,       "ld1",  ".8b",    0, false, 0  },
    334   { AArch64::LD1Threev4h,       "ld1",  ".4h",    0, false, 0  },
    335   { AArch64::LD1Threev2s,       "ld1",  ".2s",    0, false, 0  },
    336   { AArch64::LD1Threev1d,       "ld1",  ".1d",    0, false, 0  },
    337   { AArch64::LD1Threev16b_POST, "ld1",  ".16b",   1, false, 48 },
    338   { AArch64::LD1Threev8h_POST,  "ld1",  ".8h",    1, false, 48 },
    339   { AArch64::LD1Threev4s_POST,  "ld1",  ".4s",    1, false, 48 },
    340   { AArch64::LD1Threev2d_POST,  "ld1",  ".2d",    1, false, 48 },
    341   { AArch64::LD1Threev8b_POST,  "ld1",  ".8b",    1, false, 24 },
    342   { AArch64::LD1Threev4h_POST,  "ld1",  ".4h",    1, false, 24 },
    343   { AArch64::LD1Threev2s_POST,  "ld1",  ".2s",    1, false, 24 },
    344   { AArch64::LD1Threev1d_POST,  "ld1",  ".1d",    1, false, 24 },
    345   { AArch64::LD1Fourv16b,       "ld1",  ".16b",   0, false, 0  },
    346   { AArch64::LD1Fourv8h,        "ld1",  ".8h",    0, false, 0  },
    347   { AArch64::LD1Fourv4s,        "ld1",  ".4s",    0, false, 0  },
    348   { AArch64::LD1Fourv2d,        "ld1",  ".2d",    0, false, 0  },
    349   { AArch64::LD1Fourv8b,        "ld1",  ".8b",    0, false, 0  },
    350   { AArch64::LD1Fourv4h,        "ld1",  ".4h",    0, false, 0  },
    351   { AArch64::LD1Fourv2s,        "ld1",  ".2s",    0, false, 0  },
    352   { AArch64::LD1Fourv1d,        "ld1",  ".1d",    0, false, 0  },
    353   { AArch64::LD1Fourv16b_POST,  "ld1",  ".16b",   1, false, 64 },
    354   { AArch64::LD1Fourv8h_POST,   "ld1",  ".8h",    1, false, 64 },
    355   { AArch64::LD1Fourv4s_POST,   "ld1",  ".4s",    1, false, 64 },
    356   { AArch64::LD1Fourv2d_POST,   "ld1",  ".2d",    1, false, 64 },
    357   { AArch64::LD1Fourv8b_POST,   "ld1",  ".8b",    1, false, 32 },
    358   { AArch64::LD1Fourv4h_POST,   "ld1",  ".4h",    1, false, 32 },
    359   { AArch64::LD1Fourv2s_POST,   "ld1",  ".2s",    1, false, 32 },
    360   { AArch64::LD1Fourv1d_POST,   "ld1",  ".1d",    1, false, 32 },
    361   { AArch64::LD2i8,             "ld2",  ".b",     1, true,  0  },
    362   { AArch64::LD2i16,            "ld2",  ".h",     1, true,  0  },
    363   { AArch64::LD2i32,            "ld2",  ".s",     1, true,  0  },
    364   { AArch64::LD2i64,            "ld2",  ".d",     1, true,  0  },
    365   { AArch64::LD2i8_POST,        "ld2",  ".b",     2, true,  2  },
    366   { AArch64::LD2i16_POST,       "ld2",  ".h",     2, true,  4  },
    367   { AArch64::LD2i32_POST,       "ld2",  ".s",     2, true,  8  },
    368   { AArch64::LD2i64_POST,       "ld2",  ".d",     2, true,  16  },
    369   { AArch64::LD2Rv16b,          "ld2r", ".16b",   0, false, 0  },
    370   { AArch64::LD2Rv8h,           "ld2r", ".8h",    0, false, 0  },
    371   { AArch64::LD2Rv4s,           "ld2r", ".4s",    0, false, 0  },
    372   { AArch64::LD2Rv2d,           "ld2r", ".2d",    0, false, 0  },
    373   { AArch64::LD2Rv8b,           "ld2r", ".8b",    0, false, 0  },
    374   { AArch64::LD2Rv4h,           "ld2r", ".4h",    0, false, 0  },
    375   { AArch64::LD2Rv2s,           "ld2r", ".2s",    0, false, 0  },
    376   { AArch64::LD2Rv1d,           "ld2r", ".1d",    0, false, 0  },
    377   { AArch64::LD2Rv16b_POST,     "ld2r", ".16b",   1, false, 2  },
    378   { AArch64::LD2Rv8h_POST,      "ld2r", ".8h",    1, false, 4  },
    379   { AArch64::LD2Rv4s_POST,      "ld2r", ".4s",    1, false, 8  },
    380   { AArch64::LD2Rv2d_POST,      "ld2r", ".2d",    1, false, 16 },
    381   { AArch64::LD2Rv8b_POST,      "ld2r", ".8b",    1, false, 2  },
    382   { AArch64::LD2Rv4h_POST,      "ld2r", ".4h",    1, false, 4  },
    383   { AArch64::LD2Rv2s_POST,      "ld2r", ".2s",    1, false, 8  },
    384   { AArch64::LD2Rv1d_POST,      "ld2r", ".1d",    1, false, 16 },
    385   { AArch64::LD2Twov16b,        "ld2",  ".16b",   0, false, 0  },
    386   { AArch64::LD2Twov8h,         "ld2",  ".8h",    0, false, 0  },
    387   { AArch64::LD2Twov4s,         "ld2",  ".4s",    0, false, 0  },
    388   { AArch64::LD2Twov2d,         "ld2",  ".2d",    0, false, 0  },
    389   { AArch64::LD2Twov8b,         "ld2",  ".8b",    0, false, 0  },
    390   { AArch64::LD2Twov4h,         "ld2",  ".4h",    0, false, 0  },
    391   { AArch64::LD2Twov2s,         "ld2",  ".2s",    0, false, 0  },
    392   { AArch64::LD2Twov16b_POST,   "ld2",  ".16b",   1, false, 32 },
    393   { AArch64::LD2Twov8h_POST,    "ld2",  ".8h",    1, false, 32 },
    394   { AArch64::LD2Twov4s_POST,    "ld2",  ".4s",    1, false, 32 },
    395   { AArch64::LD2Twov2d_POST,    "ld2",  ".2d",    1, false, 32 },
    396   { AArch64::LD2Twov8b_POST,    "ld2",  ".8b",    1, false, 16 },
    397   { AArch64::LD2Twov4h_POST,    "ld2",  ".4h",    1, false, 16 },
    398   { AArch64::LD2Twov2s_POST,    "ld2",  ".2s",    1, false, 16 },
    399   { AArch64::LD3i8,             "ld3",  ".b",     1, true,  0  },
    400   { AArch64::LD3i16,            "ld3",  ".h",     1, true,  0  },
    401   { AArch64::LD3i32,            "ld3",  ".s",     1, true,  0  },
    402   { AArch64::LD3i64,            "ld3",  ".d",     1, true,  0  },
    403   { AArch64::LD3i8_POST,        "ld3",  ".b",     2, true,  3  },
    404   { AArch64::LD3i16_POST,       "ld3",  ".h",     2, true,  6  },
    405   { AArch64::LD3i32_POST,       "ld3",  ".s",     2, true,  12  },
    406   { AArch64::LD3i64_POST,       "ld3",  ".d",     2, true,  24  },
    407   { AArch64::LD3Rv16b,          "ld3r", ".16b",   0, false, 0  },
    408   { AArch64::LD3Rv8h,           "ld3r", ".8h",    0, false, 0  },
    409   { AArch64::LD3Rv4s,           "ld3r", ".4s",    0, false, 0  },
    410   { AArch64::LD3Rv2d,           "ld3r", ".2d",    0, false, 0  },
    411   { AArch64::LD3Rv8b,           "ld3r", ".8b",    0, false, 0  },
    412   { AArch64::LD3Rv4h,           "ld3r", ".4h",    0, false, 0  },
    413   { AArch64::LD3Rv2s,           "ld3r", ".2s",    0, false, 0  },
    414   { AArch64::LD3Rv1d,           "ld3r", ".1d",    0, false, 0  },
    415   { AArch64::LD3Rv16b_POST,     "ld3r", ".16b",   1, false, 3  },
    416   { AArch64::LD3Rv8h_POST,      "ld3r", ".8h",    1, false, 6  },
    417   { AArch64::LD3Rv4s_POST,      "ld3r", ".4s",    1, false, 12 },
    418   { AArch64::LD3Rv2d_POST,      "ld3r", ".2d",    1, false, 24 },
    419   { AArch64::LD3Rv8b_POST,      "ld3r", ".8b",    1, false, 3  },
    420   { AArch64::LD3Rv4h_POST,      "ld3r", ".4h",    1, false, 6  },
    421   { AArch64::LD3Rv2s_POST,      "ld3r", ".2s",    1, false, 12 },
    422   { AArch64::LD3Rv1d_POST,      "ld3r", ".1d",    1, false, 24 },
    423   { AArch64::LD3Threev16b,      "ld3",  ".16b",   0, false, 0  },
    424   { AArch64::LD3Threev8h,       "ld3",  ".8h",    0, false, 0  },
    425   { AArch64::LD3Threev4s,       "ld3",  ".4s",    0, false, 0  },
    426   { AArch64::LD3Threev2d,       "ld3",  ".2d",    0, false, 0  },
    427   { AArch64::LD3Threev8b,       "ld3",  ".8b",    0, false, 0  },
    428   { AArch64::LD3Threev4h,       "ld3",  ".4h",    0, false, 0  },
    429   { AArch64::LD3Threev2s,       "ld3",  ".2s",    0, false, 0  },
    430   { AArch64::LD3Threev16b_POST, "ld3",  ".16b",   1, false, 48 },
    431   { AArch64::LD3Threev8h_POST,  "ld3",  ".8h",    1, false, 48 },
    432   { AArch64::LD3Threev4s_POST,  "ld3",  ".4s",    1, false, 48 },
    433   { AArch64::LD3Threev2d_POST,  "ld3",  ".2d",    1, false, 48 },
    434   { AArch64::LD3Threev8b_POST,  "ld3",  ".8b",    1, false, 24 },
    435   { AArch64::LD3Threev4h_POST,  "ld3",  ".4h",    1, false, 24 },
    436   { AArch64::LD3Threev2s_POST,  "ld3",  ".2s",    1, false, 24 },
    437   { AArch64::LD4i8,             "ld4",  ".b",     1, true,  0  },
    438   { AArch64::LD4i16,            "ld4",  ".h",     1, true,  0  },
    439   { AArch64::LD4i32,            "ld4",  ".s",     1, true,  0  },
    440   { AArch64::LD4i64,            "ld4",  ".d",     1, true,  0  },
    441   { AArch64::LD4i8_POST,        "ld4",  ".b",     2, true,  4  },
    442   { AArch64::LD4i16_POST,       "ld4",  ".h",     2, true,  8  },
    443   { AArch64::LD4i32_POST,       "ld4",  ".s",     2, true,  16 },
    444   { AArch64::LD4i64_POST,       "ld4",  ".d",     2, true,  32 },
    445   { AArch64::LD4Rv16b,          "ld4r", ".16b",   0, false, 0  },
    446   { AArch64::LD4Rv8h,           "ld4r", ".8h",    0, false, 0  },
    447   { AArch64::LD4Rv4s,           "ld4r", ".4s",    0, false, 0  },
    448   { AArch64::LD4Rv2d,           "ld4r", ".2d",    0, false, 0  },
    449   { AArch64::LD4Rv8b,           "ld4r", ".8b",    0, false, 0  },
    450   { AArch64::LD4Rv4h,           "ld4r", ".4h",    0, false, 0  },
    451   { AArch64::LD4Rv2s,           "ld4r", ".2s",    0, false, 0  },
    452   { AArch64::LD4Rv1d,           "ld4r", ".1d",    0, false, 0  },
    453   { AArch64::LD4Rv16b_POST,     "ld4r", ".16b",   1, false, 4  },
    454   { AArch64::LD4Rv8h_POST,      "ld4r", ".8h",    1, false, 8  },
    455   { AArch64::LD4Rv4s_POST,      "ld4r", ".4s",    1, false, 16 },
    456   { AArch64::LD4Rv2d_POST,      "ld4r", ".2d",    1, false, 32 },
    457   { AArch64::LD4Rv8b_POST,      "ld4r", ".8b",    1, false, 4  },
    458   { AArch64::LD4Rv4h_POST,      "ld4r", ".4h",    1, false, 8  },
    459   { AArch64::LD4Rv2s_POST,      "ld4r", ".2s",    1, false, 16 },
    460   { AArch64::LD4Rv1d_POST,      "ld4r", ".1d",    1, false, 32 },
    461   { AArch64::LD4Fourv16b,       "ld4",  ".16b",   0, false, 0  },
    462   { AArch64::LD4Fourv8h,        "ld4",  ".8h",    0, false, 0  },
    463   { AArch64::LD4Fourv4s,        "ld4",  ".4s",    0, false, 0  },
    464   { AArch64::LD4Fourv2d,        "ld4",  ".2d",    0, false, 0  },
    465   { AArch64::LD4Fourv8b,        "ld4",  ".8b",    0, false, 0  },
    466   { AArch64::LD4Fourv4h,        "ld4",  ".4h",    0, false, 0  },
    467   { AArch64::LD4Fourv2s,        "ld4",  ".2s",    0, false, 0  },
    468   { AArch64::LD4Fourv16b_POST,  "ld4",  ".16b",   1, false, 64 },
    469   { AArch64::LD4Fourv8h_POST,   "ld4",  ".8h",    1, false, 64 },
    470   { AArch64::LD4Fourv4s_POST,   "ld4",  ".4s",    1, false, 64 },
    471   { AArch64::LD4Fourv2d_POST,   "ld4",  ".2d",    1, false, 64 },
    472   { AArch64::LD4Fourv8b_POST,   "ld4",  ".8b",    1, false, 32 },
    473   { AArch64::LD4Fourv4h_POST,   "ld4",  ".4h",    1, false, 32 },
    474   { AArch64::LD4Fourv2s_POST,   "ld4",  ".2s",    1, false, 32 },
    475   { AArch64::ST1i8,             "st1",  ".b",     0, true,  0  },
    476   { AArch64::ST1i16,            "st1",  ".h",     0, true,  0  },
    477   { AArch64::ST1i32,            "st1",  ".s",     0, true,  0  },
    478   { AArch64::ST1i64,            "st1",  ".d",     0, true,  0  },
    479   { AArch64::ST1i8_POST,        "st1",  ".b",     1, true,  1  },
    480   { AArch64::ST1i16_POST,       "st1",  ".h",     1, true,  2  },
    481   { AArch64::ST1i32_POST,       "st1",  ".s",     1, true,  4  },
    482   { AArch64::ST1i64_POST,       "st1",  ".d",     1, true,  8  },
    483   { AArch64::ST1Onev16b,        "st1",  ".16b",   0, false, 0  },
    484   { AArch64::ST1Onev8h,         "st1",  ".8h",    0, false, 0  },
    485   { AArch64::ST1Onev4s,         "st1",  ".4s",    0, false, 0  },
    486   { AArch64::ST1Onev2d,         "st1",  ".2d",    0, false, 0  },
    487   { AArch64::ST1Onev8b,         "st1",  ".8b",    0, false, 0  },
    488   { AArch64::ST1Onev4h,         "st1",  ".4h",    0, false, 0  },
    489   { AArch64::ST1Onev2s,         "st1",  ".2s",    0, false, 0  },
    490   { AArch64::ST1Onev1d,         "st1",  ".1d",    0, false, 0  },
    491   { AArch64::ST1Onev16b_POST,   "st1",  ".16b",   1, false, 16 },
    492   { AArch64::ST1Onev8h_POST,    "st1",  ".8h",    1, false, 16 },
    493   { AArch64::ST1Onev4s_POST,    "st1",  ".4s",    1, false, 16 },
    494   { AArch64::ST1Onev2d_POST,    "st1",  ".2d",    1, false, 16 },
    495   { AArch64::ST1Onev8b_POST,    "st1",  ".8b",    1, false, 8  },
    496   { AArch64::ST1Onev4h_POST,    "st1",  ".4h",    1, false, 8  },
    497   { AArch64::ST1Onev2s_POST,    "st1",  ".2s",    1, false, 8  },
    498   { AArch64::ST1Onev1d_POST,    "st1",  ".1d",    1, false, 8  },
    499   { AArch64::ST1Twov16b,        "st1",  ".16b",   0, false, 0  },
    500   { AArch64::ST1Twov8h,         "st1",  ".8h",    0, false, 0  },
    501   { AArch64::ST1Twov4s,         "st1",  ".4s",    0, false, 0  },
    502   { AArch64::ST1Twov2d,         "st1",  ".2d",    0, false, 0  },
    503   { AArch64::ST1Twov8b,         "st1",  ".8b",    0, false, 0  },
    504   { AArch64::ST1Twov4h,         "st1",  ".4h",    0, false, 0  },
    505   { AArch64::ST1Twov2s,         "st1",  ".2s",    0, false, 0  },
    506   { AArch64::ST1Twov1d,         "st1",  ".1d",    0, false, 0  },
    507   { AArch64::ST1Twov16b_POST,   "st1",  ".16b",   1, false, 32 },
    508   { AArch64::ST1Twov8h_POST,    "st1",  ".8h",    1, false, 32 },
    509   { AArch64::ST1Twov4s_POST,    "st1",  ".4s",    1, false, 32 },
    510   { AArch64::ST1Twov2d_POST,    "st1",  ".2d",    1, false, 32 },
    511   { AArch64::ST1Twov8b_POST,    "st1",  ".8b",    1, false, 16 },
    512   { AArch64::ST1Twov4h_POST,    "st1",  ".4h",    1, false, 16 },
    513   { AArch64::ST1Twov2s_POST,    "st1",  ".2s",    1, false, 16 },
    514   { AArch64::ST1Twov1d_POST,    "st1",  ".1d",    1, false, 16 },
    515   { AArch64::ST1Threev16b,      "st1",  ".16b",   0, false, 0  },
    516   { AArch64::ST1Threev8h,       "st1",  ".8h",    0, false, 0  },
    517   { AArch64::ST1Threev4s,       "st1",  ".4s",    0, false, 0  },
    518   { AArch64::ST1Threev2d,       "st1",  ".2d",    0, false, 0  },
    519   { AArch64::ST1Threev8b,       "st1",  ".8b",    0, false, 0  },
    520   { AArch64::ST1Threev4h,       "st1",  ".4h",    0, false, 0  },
    521   { AArch64::ST1Threev2s,       "st1",  ".2s",    0, false, 0  },
    522   { AArch64::ST1Threev1d,       "st1",  ".1d",    0, false, 0  },
    523   { AArch64::ST1Threev16b_POST, "st1",  ".16b",   1, false, 48 },
    524   { AArch64::ST1Threev8h_POST,  "st1",  ".8h",    1, false, 48 },
    525   { AArch64::ST1Threev4s_POST,  "st1",  ".4s",    1, false, 48 },
    526   { AArch64::ST1Threev2d_POST,  "st1",  ".2d",    1, false, 48 },
    527   { AArch64::ST1Threev8b_POST,  "st1",  ".8b",    1, false, 24 },
    528   { AArch64::ST1Threev4h_POST,  "st1",  ".4h",    1, false, 24 },
    529   { AArch64::ST1Threev2s_POST,  "st1",  ".2s",    1, false, 24 },
    530   { AArch64::ST1Threev1d_POST,  "st1",  ".1d",    1, false, 24 },
    531   { AArch64::ST1Fourv16b,       "st1",  ".16b",   0, false, 0  },
    532   { AArch64::ST1Fourv8h,        "st1",  ".8h",    0, false, 0  },
    533   { AArch64::ST1Fourv4s,        "st1",  ".4s",    0, false, 0  },
    534   { AArch64::ST1Fourv2d,        "st1",  ".2d",    0, false, 0  },
    535   { AArch64::ST1Fourv8b,        "st1",  ".8b",    0, false, 0  },
    536   { AArch64::ST1Fourv4h,        "st1",  ".4h",    0, false, 0  },
    537   { AArch64::ST1Fourv2s,        "st1",  ".2s",    0, false, 0  },
    538   { AArch64::ST1Fourv1d,        "st1",  ".1d",    0, false, 0  },
    539   { AArch64::ST1Fourv16b_POST,  "st1",  ".16b",   1, false, 64 },
    540   { AArch64::ST1Fourv8h_POST,   "st1",  ".8h",    1, false, 64 },
    541   { AArch64::ST1Fourv4s_POST,   "st1",  ".4s",    1, false, 64 },
    542   { AArch64::ST1Fourv2d_POST,   "st1",  ".2d",    1, false, 64 },
    543   { AArch64::ST1Fourv8b_POST,   "st1",  ".8b",    1, false, 32 },
    544   { AArch64::ST1Fourv4h_POST,   "st1",  ".4h",    1, false, 32 },
    545   { AArch64::ST1Fourv2s_POST,   "st1",  ".2s",    1, false, 32 },
    546   { AArch64::ST1Fourv1d_POST,   "st1",  ".1d",    1, false, 32 },
    547   { AArch64::ST2i8,             "st2",  ".b",     0, true,  0  },
    548   { AArch64::ST2i16,            "st2",  ".h",     0, true,  0  },
    549   { AArch64::ST2i32,            "st2",  ".s",     0, true,  0  },
    550   { AArch64::ST2i64,            "st2",  ".d",     0, true,  0  },
    551   { AArch64::ST2i8_POST,        "st2",  ".b",     1, true,  2  },
    552   { AArch64::ST2i16_POST,       "st2",  ".h",     1, true,  4  },
    553   { AArch64::ST2i32_POST,       "st2",  ".s",     1, true,  8  },
    554   { AArch64::ST2i64_POST,       "st2",  ".d",     1, true,  16 },
    555   { AArch64::ST2Twov16b,        "st2",  ".16b",   0, false, 0  },
    556   { AArch64::ST2Twov8h,         "st2",  ".8h",    0, false, 0  },
    557   { AArch64::ST2Twov4s,         "st2",  ".4s",    0, false, 0  },
    558   { AArch64::ST2Twov2d,         "st2",  ".2d",    0, false, 0  },
    559   { AArch64::ST2Twov8b,         "st2",  ".8b",    0, false, 0  },
    560   { AArch64::ST2Twov4h,         "st2",  ".4h",    0, false, 0  },
    561   { AArch64::ST2Twov2s,         "st2",  ".2s",    0, false, 0  },
    562   { AArch64::ST2Twov16b_POST,   "st2",  ".16b",   1, false, 32 },
    563   { AArch64::ST2Twov8h_POST,    "st2",  ".8h",    1, false, 32 },
    564   { AArch64::ST2Twov4s_POST,    "st2",  ".4s",    1, false, 32 },
    565   { AArch64::ST2Twov2d_POST,    "st2",  ".2d",    1, false, 32 },
    566   { AArch64::ST2Twov8b_POST,    "st2",  ".8b",    1, false, 16 },
    567   { AArch64::ST2Twov4h_POST,    "st2",  ".4h",    1, false, 16 },
    568   { AArch64::ST2Twov2s_POST,    "st2",  ".2s",    1, false, 16 },
    569   { AArch64::ST3i8,             "st3",  ".b",     0, true,  0  },
    570   { AArch64::ST3i16,            "st3",  ".h",     0, true,  0  },
    571   { AArch64::ST3i32,            "st3",  ".s",     0, true,  0  },
    572   { AArch64::ST3i64,            "st3",  ".d",     0, true,  0  },
    573   { AArch64::ST3i8_POST,        "st3",  ".b",     1, true,  3  },
    574   { AArch64::ST3i16_POST,       "st3",  ".h",     1, true,  6  },
    575   { AArch64::ST3i32_POST,       "st3",  ".s",     1, true,  12 },
    576   { AArch64::ST3i64_POST,       "st3",  ".d",     1, true,  24 },
    577   { AArch64::ST3Threev16b,      "st3",  ".16b",   0, false, 0  },
    578   { AArch64::ST3Threev8h,       "st3",  ".8h",    0, false, 0  },
    579   { AArch64::ST3Threev4s,       "st3",  ".4s",    0, false, 0  },
    580   { AArch64::ST3Threev2d,       "st3",  ".2d",    0, false, 0  },
    581   { AArch64::ST3Threev8b,       "st3",  ".8b",    0, false, 0  },
    582   { AArch64::ST3Threev4h,       "st3",  ".4h",    0, false, 0  },
    583   { AArch64::ST3Threev2s,       "st3",  ".2s",    0, false, 0  },
    584   { AArch64::ST3Threev16b_POST, "st3",  ".16b",   1, false, 48 },
    585   { AArch64::ST3Threev8h_POST,  "st3",  ".8h",    1, false, 48 },
    586   { AArch64::ST3Threev4s_POST,  "st3",  ".4s",    1, false, 48 },
    587   { AArch64::ST3Threev2d_POST,  "st3",  ".2d",    1, false, 48 },
    588   { AArch64::ST3Threev8b_POST,  "st3",  ".8b",    1, false, 24 },
    589   { AArch64::ST3Threev4h_POST,  "st3",  ".4h",    1, false, 24 },
    590   { AArch64::ST3Threev2s_POST,  "st3",  ".2s",    1, false, 24 },
    591   { AArch64::ST4i8,             "st4",  ".b",     0, true,  0  },
    592   { AArch64::ST4i16,            "st4",  ".h",     0, true,  0  },
    593   { AArch64::ST4i32,            "st4",  ".s",     0, true,  0  },
    594   { AArch64::ST4i64,            "st4",  ".d",     0, true,  0  },
    595   { AArch64::ST4i8_POST,        "st4",  ".b",     1, true,  4  },
    596   { AArch64::ST4i16_POST,       "st4",  ".h",     1, true,  8  },
    597   { AArch64::ST4i32_POST,       "st4",  ".s",     1, true,  16 },
    598   { AArch64::ST4i64_POST,       "st4",  ".d",     1, true,  32 },
    599   { AArch64::ST4Fourv16b,       "st4",  ".16b",   0, false, 0  },
    600   { AArch64::ST4Fourv8h,        "st4",  ".8h",    0, false, 0  },
    601   { AArch64::ST4Fourv4s,        "st4",  ".4s",    0, false, 0  },
    602   { AArch64::ST4Fourv2d,        "st4",  ".2d",    0, false, 0  },
    603   { AArch64::ST4Fourv8b,        "st4",  ".8b",    0, false, 0  },
    604   { AArch64::ST4Fourv4h,        "st4",  ".4h",    0, false, 0  },
    605   { AArch64::ST4Fourv2s,        "st4",  ".2s",    0, false, 0  },
    606   { AArch64::ST4Fourv16b_POST,  "st4",  ".16b",   1, false, 64 },
    607   { AArch64::ST4Fourv8h_POST,   "st4",  ".8h",    1, false, 64 },
    608   { AArch64::ST4Fourv4s_POST,   "st4",  ".4s",    1, false, 64 },
    609   { AArch64::ST4Fourv2d_POST,   "st4",  ".2d",    1, false, 64 },
    610   { AArch64::ST4Fourv8b_POST,   "st4",  ".8b",    1, false, 32 },
    611   { AArch64::ST4Fourv4h_POST,   "st4",  ".4h",    1, false, 32 },
    612   { AArch64::ST4Fourv2s_POST,   "st4",  ".2s",    1, false, 32 },
    613 };
    614 
    615 static const LdStNInstrDesc *getLdStNInstrDesc(unsigned Opcode) {
    616   unsigned Idx;
    617   for (Idx = 0; Idx != array_lengthof(LdStNInstInfo); ++Idx)
    618     if (LdStNInstInfo[Idx].Opcode == Opcode)
    619       return &LdStNInstInfo[Idx];
    620 
    621   return nullptr;
    622 }
    623 
    624 void AArch64AppleInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
    625                                         StringRef Annot,
    626                                         const MCSubtargetInfo &STI) {
    627   unsigned Opcode = MI->getOpcode();
    628   StringRef Layout, Mnemonic;
    629 
    630   bool IsTbx;
    631   if (isTblTbxInstruction(MI->getOpcode(), Layout, IsTbx)) {
    632     O << "\t" << (IsTbx ? "tbx" : "tbl") << Layout << '\t'
    633       << getRegisterName(MI->getOperand(0).getReg(), AArch64::vreg) << ", ";
    634 
    635     unsigned ListOpNum = IsTbx ? 2 : 1;
    636     printVectorList(MI, ListOpNum, STI, O, "");
    637 
    638     O << ", "
    639       << getRegisterName(MI->getOperand(ListOpNum + 1).getReg(), AArch64::vreg);
    640     printAnnotation(O, Annot);
    641     return;
    642   }
    643 
    644   if (const LdStNInstrDesc *LdStDesc = getLdStNInstrDesc(Opcode)) {
    645     O << "\t" << LdStDesc->Mnemonic << LdStDesc->Layout << '\t';
    646 
    647     // Now onto the operands: first a vector list with possible lane
    648     // specifier. E.g. { v0 }[2]
    649     int OpNum = LdStDesc->ListOperand;
    650     printVectorList(MI, OpNum++, STI, O, "");
    651 
    652     if (LdStDesc->HasLane)
    653       O << '[' << MI->getOperand(OpNum++).getImm() << ']';
    654 
    655     // Next the address: [xN]
    656     unsigned AddrReg = MI->getOperand(OpNum++).getReg();
    657     O << ", [" << getRegisterName(AddrReg) << ']';
    658 
    659     // Finally, there might be a post-indexed offset.
    660     if (LdStDesc->NaturalOffset != 0) {
    661       unsigned Reg = MI->getOperand(OpNum++).getReg();
    662       if (Reg != AArch64::XZR)
    663         O << ", " << getRegisterName(Reg);
    664       else {
    665         assert(LdStDesc->NaturalOffset && "no offset on post-inc instruction?");
    666         O << ", #" << LdStDesc->NaturalOffset;
    667       }
    668     }
    669 
    670     printAnnotation(O, Annot);
    671     return;
    672   }
    673 
    674   AArch64InstPrinter::printInst(MI, O, Annot, STI);
    675 }
    676 
    677 bool AArch64InstPrinter::printSysAlias(const MCInst *MI,
    678                                        const MCSubtargetInfo &STI,
    679                                        raw_ostream &O) {
    680 #ifndef NDEBUG
    681   unsigned Opcode = MI->getOpcode();
    682   assert(Opcode == AArch64::SYSxt && "Invalid opcode for SYS alias!");
    683 #endif
    684 
    685   const char *Asm = nullptr;
    686   const MCOperand &Op1 = MI->getOperand(0);
    687   const MCOperand &Cn = MI->getOperand(1);
    688   const MCOperand &Cm = MI->getOperand(2);
    689   const MCOperand &Op2 = MI->getOperand(3);
    690 
    691   unsigned Op1Val = Op1.getImm();
    692   unsigned CnVal = Cn.getImm();
    693   unsigned CmVal = Cm.getImm();
    694   unsigned Op2Val = Op2.getImm();
    695 
    696   if (CnVal == 7) {
    697     switch (CmVal) {
    698     default:
    699       break;
    700 
    701     // IC aliases
    702     case 1:
    703       if (Op1Val == 0 && Op2Val == 0)
    704         Asm = "ic\tialluis";
    705       break;
    706     case 5:
    707       if (Op1Val == 0 && Op2Val == 0)
    708         Asm = "ic\tiallu";
    709       else if (Op1Val == 3 && Op2Val == 1)
    710         Asm = "ic\tivau";
    711       break;
    712 
    713     // DC aliases
    714     case 4:
    715       if (Op1Val == 3 && Op2Val == 1)
    716         Asm = "dc\tzva";
    717       break;
    718     case 6:
    719       if (Op1Val == 0 && Op2Val == 1)
    720         Asm = "dc\tivac";
    721       if (Op1Val == 0 && Op2Val == 2)
    722         Asm = "dc\tisw";
    723       break;
    724     case 10:
    725       if (Op1Val == 3 && Op2Val == 1)
    726         Asm = "dc\tcvac";
    727       else if (Op1Val == 0 && Op2Val == 2)
    728         Asm = "dc\tcsw";
    729       break;
    730     case 11:
    731       if (Op1Val == 3 && Op2Val == 1)
    732         Asm = "dc\tcvau";
    733       break;
    734     case 12:
    735       if (Op1Val == 3 && Op2Val == 1 &&
    736           (STI.getFeatureBits()[AArch64::HasV8_2aOps]))
    737         Asm = "dc\tcvap";
    738       break;
    739     case 14:
    740       if (Op1Val == 3 && Op2Val == 1)
    741         Asm = "dc\tcivac";
    742       else if (Op1Val == 0 && Op2Val == 2)
    743         Asm = "dc\tcisw";
    744       break;
    745 
    746     // AT aliases
    747     case 8:
    748       switch (Op1Val) {
    749       default:
    750         break;
    751       case 0:
    752         switch (Op2Val) {
    753         default:
    754           break;
    755         case 0: Asm = "at\ts1e1r"; break;
    756         case 1: Asm = "at\ts1e1w"; break;
    757         case 2: Asm = "at\ts1e0r"; break;
    758         case 3: Asm = "at\ts1e0w"; break;
    759         }
    760         break;
    761       case 4:
    762         switch (Op2Val) {
    763         default:
    764           break;
    765         case 0: Asm = "at\ts1e2r"; break;
    766         case 1: Asm = "at\ts1e2w"; break;
    767         case 4: Asm = "at\ts12e1r"; break;
    768         case 5: Asm = "at\ts12e1w"; break;
    769         case 6: Asm = "at\ts12e0r"; break;
    770         case 7: Asm = "at\ts12e0w"; break;
    771         }
    772         break;
    773       case 6:
    774         switch (Op2Val) {
    775         default:
    776           break;
    777         case 0: Asm = "at\ts1e3r"; break;
    778         case 1: Asm = "at\ts1e3w"; break;
    779         }
    780         break;
    781       }
    782       break;
    783     case 9:
    784       switch (Op1Val) {
    785       default:
    786         break;
    787       case 0:
    788         if (STI.getFeatureBits()[AArch64::HasV8_2aOps]) {
    789           switch (Op2Val) {
    790           default:
    791             break;
    792           case 0: Asm = "at\ts1e1rp"; break;
    793           case 1: Asm = "at\ts1e1wp"; break;
    794           }
    795         }
    796         break;
    797       }
    798     }
    799   } else if (CnVal == 8) {
    800     // TLBI aliases
    801     switch (CmVal) {
    802     default:
    803       break;
    804     case 3:
    805       switch (Op1Val) {
    806       default:
    807         break;
    808       case 0:
    809         switch (Op2Val) {
    810         default:
    811           break;
    812         case 0: Asm = "tlbi\tvmalle1is"; break;
    813         case 1: Asm = "tlbi\tvae1is"; break;
    814         case 2: Asm = "tlbi\taside1is"; break;
    815         case 3: Asm = "tlbi\tvaae1is"; break;
    816         case 5: Asm = "tlbi\tvale1is"; break;
    817         case 7: Asm = "tlbi\tvaale1is"; break;
    818         }
    819         break;
    820       case 4:
    821         switch (Op2Val) {
    822         default:
    823           break;
    824         case 0: Asm = "tlbi\talle2is"; break;
    825         case 1: Asm = "tlbi\tvae2is"; break;
    826         case 4: Asm = "tlbi\talle1is"; break;
    827         case 5: Asm = "tlbi\tvale2is"; break;
    828         case 6: Asm = "tlbi\tvmalls12e1is"; break;
    829         }
    830         break;
    831       case 6:
    832         switch (Op2Val) {
    833         default:
    834           break;
    835         case 0: Asm = "tlbi\talle3is"; break;
    836         case 1: Asm = "tlbi\tvae3is"; break;
    837         case 5: Asm = "tlbi\tvale3is"; break;
    838         }
    839         break;
    840       }
    841       break;
    842     case 0:
    843       switch (Op1Val) {
    844       default:
    845         break;
    846       case 4:
    847         switch (Op2Val) {
    848         default:
    849           break;
    850         case 1: Asm = "tlbi\tipas2e1is"; break;
    851         case 5: Asm = "tlbi\tipas2le1is"; break;
    852         }
    853         break;
    854       }
    855       break;
    856     case 4:
    857       switch (Op1Val) {
    858       default:
    859         break;
    860       case 4:
    861         switch (Op2Val) {
    862         default:
    863           break;
    864         case 1: Asm = "tlbi\tipas2e1"; break;
    865         case 5: Asm = "tlbi\tipas2le1"; break;
    866         }
    867         break;
    868       }
    869       break;
    870     case 7:
    871       switch (Op1Val) {
    872       default:
    873         break;
    874       case 0:
    875         switch (Op2Val) {
    876         default:
    877           break;
    878         case 0: Asm = "tlbi\tvmalle1"; break;
    879         case 1: Asm = "tlbi\tvae1"; break;
    880         case 2: Asm = "tlbi\taside1"; break;
    881         case 3: Asm = "tlbi\tvaae1"; break;
    882         case 5: Asm = "tlbi\tvale1"; break;
    883         case 7: Asm = "tlbi\tvaale1"; break;
    884         }
    885         break;
    886       case 4:
    887         switch (Op2Val) {
    888         default:
    889           break;
    890         case 0: Asm = "tlbi\talle2"; break;
    891         case 1: Asm = "tlbi\tvae2"; break;
    892         case 4: Asm = "tlbi\talle1"; break;
    893         case 5: Asm = "tlbi\tvale2"; break;
    894         case 6: Asm = "tlbi\tvmalls12e1"; break;
    895         }
    896         break;
    897       case 6:
    898         switch (Op2Val) {
    899         default:
    900           break;
    901         case 0: Asm = "tlbi\talle3"; break;
    902         case 1: Asm = "tlbi\tvae3";  break;
    903         case 5: Asm = "tlbi\tvale3"; break;
    904         }
    905         break;
    906       }
    907       break;
    908     }
    909   }
    910 
    911   if (Asm) {
    912     unsigned Reg = MI->getOperand(4).getReg();
    913 
    914     O << '\t' << Asm;
    915     if (StringRef(Asm).lower().find("all") == StringRef::npos)
    916       O << ", " << getRegisterName(Reg);
    917   }
    918 
    919   return Asm != nullptr;
    920 }
    921 
    922 void AArch64InstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
    923                                       const MCSubtargetInfo &STI,
    924                                       raw_ostream &O) {
    925   const MCOperand &Op = MI->getOperand(OpNo);
    926   if (Op.isReg()) {
    927     unsigned Reg = Op.getReg();
    928     O << getRegisterName(Reg);
    929   } else if (Op.isImm()) {
    930     O << '#' << Op.getImm();
    931   } else {
    932     assert(Op.isExpr() && "unknown operand kind in printOperand");
    933     Op.getExpr()->print(O, &MAI);
    934   }
    935 }
    936 
    937 void AArch64InstPrinter::printHexImm(const MCInst *MI, unsigned OpNo,
    938                                      const MCSubtargetInfo &STI,
    939                                      raw_ostream &O) {
    940   const MCOperand &Op = MI->getOperand(OpNo);
    941   O << format("#%#llx", Op.getImm());
    942 }
    943 
    944 void AArch64InstPrinter::printPostIncOperand(const MCInst *MI, unsigned OpNo,
    945                                              unsigned Imm, raw_ostream &O) {
    946   const MCOperand &Op = MI->getOperand(OpNo);
    947   if (Op.isReg()) {
    948     unsigned Reg = Op.getReg();
    949     if (Reg == AArch64::XZR)
    950       O << "#" << Imm;
    951     else
    952       O << getRegisterName(Reg);
    953   } else
    954     llvm_unreachable("unknown operand kind in printPostIncOperand64");
    955 }
    956 
    957 void AArch64InstPrinter::printVRegOperand(const MCInst *MI, unsigned OpNo,
    958                                           const MCSubtargetInfo &STI,
    959                                           raw_ostream &O) {
    960   const MCOperand &Op = MI->getOperand(OpNo);
    961   assert(Op.isReg() && "Non-register vreg operand!");
    962   unsigned Reg = Op.getReg();
    963   O << getRegisterName(Reg, AArch64::vreg);
    964 }
    965 
    966 void AArch64InstPrinter::printSysCROperand(const MCInst *MI, unsigned OpNo,
    967                                            const MCSubtargetInfo &STI,
    968                                            raw_ostream &O) {
    969   const MCOperand &Op = MI->getOperand(OpNo);
    970   assert(Op.isImm() && "System instruction C[nm] operands must be immediates!");
    971   O << "c" << Op.getImm();
    972 }
    973 
    974 void AArch64InstPrinter::printAddSubImm(const MCInst *MI, unsigned OpNum,
    975                                         const MCSubtargetInfo &STI,
    976                                         raw_ostream &O) {
    977   const MCOperand &MO = MI->getOperand(OpNum);
    978   if (MO.isImm()) {
    979     unsigned Val = (MO.getImm() & 0xfff);
    980     assert(Val == MO.getImm() && "Add/sub immediate out of range!");
    981     unsigned Shift =
    982         AArch64_AM::getShiftValue(MI->getOperand(OpNum + 1).getImm());
    983     O << '#' << Val;
    984     if (Shift != 0)
    985       printShifter(MI, OpNum + 1, STI, O);
    986 
    987     if (CommentStream)
    988       *CommentStream << '=' << (Val << Shift) << '\n';
    989   } else {
    990     assert(MO.isExpr() && "Unexpected operand type!");
    991     MO.getExpr()->print(O, &MAI);
    992     printShifter(MI, OpNum + 1, STI, O);
    993   }
    994 }
    995 
    996 void AArch64InstPrinter::printLogicalImm32(const MCInst *MI, unsigned OpNum,
    997                                            const MCSubtargetInfo &STI,
    998                                            raw_ostream &O) {
    999   uint64_t Val = MI->getOperand(OpNum).getImm();
   1000   O << "#0x";
   1001   O.write_hex(AArch64_AM::decodeLogicalImmediate(Val, 32));
   1002 }
   1003 
   1004 void AArch64InstPrinter::printLogicalImm64(const MCInst *MI, unsigned OpNum,
   1005                                            const MCSubtargetInfo &STI,
   1006                                            raw_ostream &O) {
   1007   uint64_t Val = MI->getOperand(OpNum).getImm();
   1008   O << "#0x";
   1009   O.write_hex(AArch64_AM::decodeLogicalImmediate(Val, 64));
   1010 }
   1011 
   1012 void AArch64InstPrinter::printShifter(const MCInst *MI, unsigned OpNum,
   1013                                       const MCSubtargetInfo &STI,
   1014                                       raw_ostream &O) {
   1015   unsigned Val = MI->getOperand(OpNum).getImm();
   1016   // LSL #0 should not be printed.
   1017   if (AArch64_AM::getShiftType(Val) == AArch64_AM::LSL &&
   1018       AArch64_AM::getShiftValue(Val) == 0)
   1019     return;
   1020   O << ", " << AArch64_AM::getShiftExtendName(AArch64_AM::getShiftType(Val))
   1021     << " #" << AArch64_AM::getShiftValue(Val);
   1022 }
   1023 
   1024 void AArch64InstPrinter::printShiftedRegister(const MCInst *MI, unsigned OpNum,
   1025                                               const MCSubtargetInfo &STI,
   1026                                               raw_ostream &O) {
   1027   O << getRegisterName(MI->getOperand(OpNum).getReg());
   1028   printShifter(MI, OpNum + 1, STI, O);
   1029 }
   1030 
   1031 void AArch64InstPrinter::printExtendedRegister(const MCInst *MI, unsigned OpNum,
   1032                                                const MCSubtargetInfo &STI,
   1033                                                raw_ostream &O) {
   1034   O << getRegisterName(MI->getOperand(OpNum).getReg());
   1035   printArithExtend(MI, OpNum + 1, STI, O);
   1036 }
   1037 
   1038 void AArch64InstPrinter::printArithExtend(const MCInst *MI, unsigned OpNum,
   1039                                           const MCSubtargetInfo &STI,
   1040                                           raw_ostream &O) {
   1041   unsigned Val = MI->getOperand(OpNum).getImm();
   1042   AArch64_AM::ShiftExtendType ExtType = AArch64_AM::getArithExtendType(Val);
   1043   unsigned ShiftVal = AArch64_AM::getArithShiftValue(Val);
   1044 
   1045   // If the destination or first source register operand is [W]SP, print
   1046   // UXTW/UXTX as LSL, and if the shift amount is also zero, print nothing at
   1047   // all.
   1048   if (ExtType == AArch64_AM::UXTW || ExtType == AArch64_AM::UXTX) {
   1049     unsigned Dest = MI->getOperand(0).getReg();
   1050     unsigned Src1 = MI->getOperand(1).getReg();
   1051     if ( ((Dest == AArch64::SP || Src1 == AArch64::SP) &&
   1052           ExtType == AArch64_AM::UXTX) ||
   1053          ((Dest == AArch64::WSP || Src1 == AArch64::WSP) &&
   1054           ExtType == AArch64_AM::UXTW) ) {
   1055       if (ShiftVal != 0)
   1056         O << ", lsl #" << ShiftVal;
   1057       return;
   1058     }
   1059   }
   1060   O << ", " << AArch64_AM::getShiftExtendName(ExtType);
   1061   if (ShiftVal != 0)
   1062     O << " #" << ShiftVal;
   1063 }
   1064 
   1065 void AArch64InstPrinter::printMemExtend(const MCInst *MI, unsigned OpNum,
   1066                                         raw_ostream &O, char SrcRegKind,
   1067                                         unsigned Width) {
   1068   unsigned SignExtend = MI->getOperand(OpNum).getImm();
   1069   unsigned DoShift = MI->getOperand(OpNum + 1).getImm();
   1070 
   1071   // sxtw, sxtx, uxtw or lsl (== uxtx)
   1072   bool IsLSL = !SignExtend && SrcRegKind == 'x';
   1073   if (IsLSL)
   1074     O << "lsl";
   1075   else
   1076     O << (SignExtend ? 's' : 'u') << "xt" << SrcRegKind;
   1077 
   1078   if (DoShift || IsLSL)
   1079     O << " #" << Log2_32(Width / 8);
   1080 }
   1081 
   1082 void AArch64InstPrinter::printCondCode(const MCInst *MI, unsigned OpNum,
   1083                                        const MCSubtargetInfo &STI,
   1084                                        raw_ostream &O) {
   1085   AArch64CC::CondCode CC = (AArch64CC::CondCode)MI->getOperand(OpNum).getImm();
   1086   O << AArch64CC::getCondCodeName(CC);
   1087 }
   1088 
   1089 void AArch64InstPrinter::printInverseCondCode(const MCInst *MI, unsigned OpNum,
   1090                                               const MCSubtargetInfo &STI,
   1091                                               raw_ostream &O) {
   1092   AArch64CC::CondCode CC = (AArch64CC::CondCode)MI->getOperand(OpNum).getImm();
   1093   O << AArch64CC::getCondCodeName(AArch64CC::getInvertedCondCode(CC));
   1094 }
   1095 
   1096 void AArch64InstPrinter::printAMNoIndex(const MCInst *MI, unsigned OpNum,
   1097                                         const MCSubtargetInfo &STI,
   1098                                         raw_ostream &O) {
   1099   O << '[' << getRegisterName(MI->getOperand(OpNum).getReg()) << ']';
   1100 }
   1101 
   1102 template<int Scale>
   1103 void AArch64InstPrinter::printImmScale(const MCInst *MI, unsigned OpNum,
   1104                                        const MCSubtargetInfo &STI,
   1105                                        raw_ostream &O) {
   1106   O << '#' << Scale * MI->getOperand(OpNum).getImm();
   1107 }
   1108 
   1109 void AArch64InstPrinter::printUImm12Offset(const MCInst *MI, unsigned OpNum,
   1110                                            unsigned Scale, raw_ostream &O) {
   1111   const MCOperand MO = MI->getOperand(OpNum);
   1112   if (MO.isImm()) {
   1113     O << "#" << (MO.getImm() * Scale);
   1114   } else {
   1115     assert(MO.isExpr() && "Unexpected operand type!");
   1116     MO.getExpr()->print(O, &MAI);
   1117   }
   1118 }
   1119 
   1120 void AArch64InstPrinter::printAMIndexedWB(const MCInst *MI, unsigned OpNum,
   1121                                           unsigned Scale, raw_ostream &O) {
   1122   const MCOperand MO1 = MI->getOperand(OpNum + 1);
   1123   O << '[' << getRegisterName(MI->getOperand(OpNum).getReg());
   1124   if (MO1.isImm()) {
   1125       O << ", #" << (MO1.getImm() * Scale);
   1126   } else {
   1127     assert(MO1.isExpr() && "Unexpected operand type!");
   1128     O << ", ";
   1129     MO1.getExpr()->print(O, &MAI);
   1130   }
   1131   O << ']';
   1132 }
   1133 
   1134 void AArch64InstPrinter::printPrefetchOp(const MCInst *MI, unsigned OpNum,
   1135                                          const MCSubtargetInfo &STI,
   1136                                          raw_ostream &O) {
   1137   unsigned prfop = MI->getOperand(OpNum).getImm();
   1138   bool Valid;
   1139   StringRef Name =
   1140       AArch64PRFM::PRFMMapper().toString(prfop, STI.getFeatureBits(), Valid);
   1141   if (Valid)
   1142     O << Name;
   1143   else
   1144     O << '#' << prfop;
   1145 }
   1146 
   1147 void AArch64InstPrinter::printPSBHintOp(const MCInst *MI, unsigned OpNum,
   1148                                         const MCSubtargetInfo &STI,
   1149                                         raw_ostream &O) {
   1150   unsigned psbhintop = MI->getOperand(OpNum).getImm();
   1151   bool Valid;
   1152   StringRef Name =
   1153       AArch64PSBHint::PSBHintMapper().toString(psbhintop, STI.getFeatureBits(), Valid);
   1154   if (Valid)
   1155     O << Name;
   1156   else
   1157     O << '#' << psbhintop;
   1158 }
   1159 
   1160 void AArch64InstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
   1161                                            const MCSubtargetInfo &STI,
   1162                                            raw_ostream &O) {
   1163   const MCOperand &MO = MI->getOperand(OpNum);
   1164   float FPImm =
   1165       MO.isFPImm() ? MO.getFPImm() : AArch64_AM::getFPImmFloat(MO.getImm());
   1166 
   1167   // 8 decimal places are enough to perfectly represent permitted floats.
   1168   O << format("#%.8f", FPImm);
   1169 }
   1170 
   1171 static unsigned getNextVectorRegister(unsigned Reg, unsigned Stride = 1) {
   1172   while (Stride--) {
   1173     switch (Reg) {
   1174     default:
   1175       llvm_unreachable("Vector register expected!");
   1176     case AArch64::Q0:  Reg = AArch64::Q1;  break;
   1177     case AArch64::Q1:  Reg = AArch64::Q2;  break;
   1178     case AArch64::Q2:  Reg = AArch64::Q3;  break;
   1179     case AArch64::Q3:  Reg = AArch64::Q4;  break;
   1180     case AArch64::Q4:  Reg = AArch64::Q5;  break;
   1181     case AArch64::Q5:  Reg = AArch64::Q6;  break;
   1182     case AArch64::Q6:  Reg = AArch64::Q7;  break;
   1183     case AArch64::Q7:  Reg = AArch64::Q8;  break;
   1184     case AArch64::Q8:  Reg = AArch64::Q9;  break;
   1185     case AArch64::Q9:  Reg = AArch64::Q10; break;
   1186     case AArch64::Q10: Reg = AArch64::Q11; break;
   1187     case AArch64::Q11: Reg = AArch64::Q12; break;
   1188     case AArch64::Q12: Reg = AArch64::Q13; break;
   1189     case AArch64::Q13: Reg = AArch64::Q14; break;
   1190     case AArch64::Q14: Reg = AArch64::Q15; break;
   1191     case AArch64::Q15: Reg = AArch64::Q16; break;
   1192     case AArch64::Q16: Reg = AArch64::Q17; break;
   1193     case AArch64::Q17: Reg = AArch64::Q18; break;
   1194     case AArch64::Q18: Reg = AArch64::Q19; break;
   1195     case AArch64::Q19: Reg = AArch64::Q20; break;
   1196     case AArch64::Q20: Reg = AArch64::Q21; break;
   1197     case AArch64::Q21: Reg = AArch64::Q22; break;
   1198     case AArch64::Q22: Reg = AArch64::Q23; break;
   1199     case AArch64::Q23: Reg = AArch64::Q24; break;
   1200     case AArch64::Q24: Reg = AArch64::Q25; break;
   1201     case AArch64::Q25: Reg = AArch64::Q26; break;
   1202     case AArch64::Q26: Reg = AArch64::Q27; break;
   1203     case AArch64::Q27: Reg = AArch64::Q28; break;
   1204     case AArch64::Q28: Reg = AArch64::Q29; break;
   1205     case AArch64::Q29: Reg = AArch64::Q30; break;
   1206     case AArch64::Q30: Reg = AArch64::Q31; break;
   1207     // Vector lists can wrap around.
   1208     case AArch64::Q31:
   1209       Reg = AArch64::Q0;
   1210       break;
   1211     }
   1212   }
   1213   return Reg;
   1214 }
   1215 
   1216 template<unsigned size>
   1217 void AArch64InstPrinter::printGPRSeqPairsClassOperand(const MCInst *MI,
   1218                                                    unsigned OpNum,
   1219                                                    const MCSubtargetInfo &STI,
   1220                                                    raw_ostream &O) {
   1221   static_assert(size == 64 || size == 32,
   1222                 "Template parameter must be either 32 or 64");
   1223   unsigned Reg = MI->getOperand(OpNum).getReg();
   1224 
   1225   unsigned Sube = (size == 32) ? AArch64::sube32 : AArch64::sube64;
   1226   unsigned Subo = (size == 32) ? AArch64::subo32 : AArch64::subo64;
   1227 
   1228   unsigned Even = MRI.getSubReg(Reg,  Sube);
   1229   unsigned Odd = MRI.getSubReg(Reg,  Subo);
   1230   O << getRegisterName(Even) << ", " << getRegisterName(Odd);
   1231 }
   1232 
   1233 void AArch64InstPrinter::printVectorList(const MCInst *MI, unsigned OpNum,
   1234                                          const MCSubtargetInfo &STI,
   1235                                          raw_ostream &O,
   1236                                          StringRef LayoutSuffix) {
   1237   unsigned Reg = MI->getOperand(OpNum).getReg();
   1238 
   1239   O << "{ ";
   1240 
   1241   // Work out how many registers there are in the list (if there is an actual
   1242   // list).
   1243   unsigned NumRegs = 1;
   1244   if (MRI.getRegClass(AArch64::DDRegClassID).contains(Reg) ||
   1245       MRI.getRegClass(AArch64::QQRegClassID).contains(Reg))
   1246     NumRegs = 2;
   1247   else if (MRI.getRegClass(AArch64::DDDRegClassID).contains(Reg) ||
   1248            MRI.getRegClass(AArch64::QQQRegClassID).contains(Reg))
   1249     NumRegs = 3;
   1250   else if (MRI.getRegClass(AArch64::DDDDRegClassID).contains(Reg) ||
   1251            MRI.getRegClass(AArch64::QQQQRegClassID).contains(Reg))
   1252     NumRegs = 4;
   1253 
   1254   // Now forget about the list and find out what the first register is.
   1255   if (unsigned FirstReg = MRI.getSubReg(Reg, AArch64::dsub0))
   1256     Reg = FirstReg;
   1257   else if (unsigned FirstReg = MRI.getSubReg(Reg, AArch64::qsub0))
   1258     Reg = FirstReg;
   1259 
   1260   // If it's a D-reg, we need to promote it to the equivalent Q-reg before
   1261   // printing (otherwise getRegisterName fails).
   1262   if (MRI.getRegClass(AArch64::FPR64RegClassID).contains(Reg)) {
   1263     const MCRegisterClass &FPR128RC =
   1264         MRI.getRegClass(AArch64::FPR128RegClassID);
   1265     Reg = MRI.getMatchingSuperReg(Reg, AArch64::dsub, &FPR128RC);
   1266   }
   1267 
   1268   for (unsigned i = 0; i < NumRegs; ++i, Reg = getNextVectorRegister(Reg)) {
   1269     O << getRegisterName(Reg, AArch64::vreg) << LayoutSuffix;
   1270     if (i + 1 != NumRegs)
   1271       O << ", ";
   1272   }
   1273 
   1274   O << " }";
   1275 }
   1276 
   1277 void
   1278 AArch64InstPrinter::printImplicitlyTypedVectorList(const MCInst *MI,
   1279                                                    unsigned OpNum,
   1280                                                    const MCSubtargetInfo &STI,
   1281                                                    raw_ostream &O) {
   1282   printVectorList(MI, OpNum, STI, O, "");
   1283 }
   1284 
   1285 template <unsigned NumLanes, char LaneKind>
   1286 void AArch64InstPrinter::printTypedVectorList(const MCInst *MI, unsigned OpNum,
   1287                                               const MCSubtargetInfo &STI,
   1288                                               raw_ostream &O) {
   1289   std::string Suffix(".");
   1290   if (NumLanes)
   1291     Suffix += itostr(NumLanes) + LaneKind;
   1292   else
   1293     Suffix += LaneKind;
   1294 
   1295   printVectorList(MI, OpNum, STI, O, Suffix);
   1296 }
   1297 
   1298 void AArch64InstPrinter::printVectorIndex(const MCInst *MI, unsigned OpNum,
   1299                                           const MCSubtargetInfo &STI,
   1300                                           raw_ostream &O) {
   1301   O << "[" << MI->getOperand(OpNum).getImm() << "]";
   1302 }
   1303 
   1304 void AArch64InstPrinter::printAlignedLabel(const MCInst *MI, unsigned OpNum,
   1305                                            const MCSubtargetInfo &STI,
   1306                                            raw_ostream &O) {
   1307   const MCOperand &Op = MI->getOperand(OpNum);
   1308 
   1309   // If the label has already been resolved to an immediate offset (say, when
   1310   // we're running the disassembler), just print the immediate.
   1311   if (Op.isImm()) {
   1312     O << "#" << (Op.getImm() * 4);
   1313     return;
   1314   }
   1315 
   1316   // If the branch target is simply an address then print it in hex.
   1317   const MCConstantExpr *BranchTarget =
   1318       dyn_cast<MCConstantExpr>(MI->getOperand(OpNum).getExpr());
   1319   int64_t Address;
   1320   if (BranchTarget && BranchTarget->evaluateAsAbsolute(Address)) {
   1321     O << "0x";
   1322     O.write_hex(Address);
   1323   } else {
   1324     // Otherwise, just print the expression.
   1325     MI->getOperand(OpNum).getExpr()->print(O, &MAI);
   1326   }
   1327 }
   1328 
   1329 void AArch64InstPrinter::printAdrpLabel(const MCInst *MI, unsigned OpNum,
   1330                                         const MCSubtargetInfo &STI,
   1331                                         raw_ostream &O) {
   1332   const MCOperand &Op = MI->getOperand(OpNum);
   1333 
   1334   // If the label has already been resolved to an immediate offset (say, when
   1335   // we're running the disassembler), just print the immediate.
   1336   if (Op.isImm()) {
   1337     O << "#" << (Op.getImm() * (1 << 12));
   1338     return;
   1339   }
   1340 
   1341   // Otherwise, just print the expression.
   1342   MI->getOperand(OpNum).getExpr()->print(O, &MAI);
   1343 }
   1344 
   1345 void AArch64InstPrinter::printBarrierOption(const MCInst *MI, unsigned OpNo,
   1346                                             const MCSubtargetInfo &STI,
   1347                                             raw_ostream &O) {
   1348   unsigned Val = MI->getOperand(OpNo).getImm();
   1349   unsigned Opcode = MI->getOpcode();
   1350 
   1351   bool Valid;
   1352   StringRef Name;
   1353   if (Opcode == AArch64::ISB)
   1354     Name = AArch64ISB::ISBMapper().toString(Val, STI.getFeatureBits(),
   1355                                             Valid);
   1356   else
   1357     Name = AArch64DB::DBarrierMapper().toString(Val, STI.getFeatureBits(),
   1358                                                 Valid);
   1359   if (Valid)
   1360     O << Name;
   1361   else
   1362     O << "#" << Val;
   1363 }
   1364 
   1365 void AArch64InstPrinter::printMRSSystemRegister(const MCInst *MI, unsigned OpNo,
   1366                                                 const MCSubtargetInfo &STI,
   1367                                                 raw_ostream &O) {
   1368   unsigned Val = MI->getOperand(OpNo).getImm();
   1369 
   1370   auto Mapper = AArch64SysReg::MRSMapper();
   1371   std::string Name = Mapper.toString(Val, STI.getFeatureBits());
   1372 
   1373   O << StringRef(Name).upper();
   1374 }
   1375 
   1376 void AArch64InstPrinter::printMSRSystemRegister(const MCInst *MI, unsigned OpNo,
   1377                                                 const MCSubtargetInfo &STI,
   1378                                                 raw_ostream &O) {
   1379   unsigned Val = MI->getOperand(OpNo).getImm();
   1380 
   1381   auto Mapper = AArch64SysReg::MSRMapper();
   1382   std::string Name = Mapper.toString(Val, STI.getFeatureBits());
   1383 
   1384   O << StringRef(Name).upper();
   1385 }
   1386 
   1387 void AArch64InstPrinter::printSystemPStateField(const MCInst *MI, unsigned OpNo,
   1388                                                 const MCSubtargetInfo &STI,
   1389                                                 raw_ostream &O) {
   1390   unsigned Val = MI->getOperand(OpNo).getImm();
   1391 
   1392   bool Valid;
   1393   StringRef Name =
   1394       AArch64PState::PStateMapper().toString(Val, STI.getFeatureBits(), Valid);
   1395   if (Valid)
   1396     O << Name.upper();
   1397   else
   1398     O << "#" << Val;
   1399 }
   1400 
   1401 void AArch64InstPrinter::printSIMDType10Operand(const MCInst *MI, unsigned OpNo,
   1402                                                 const MCSubtargetInfo &STI,
   1403                                                 raw_ostream &O) {
   1404   unsigned RawVal = MI->getOperand(OpNo).getImm();
   1405   uint64_t Val = AArch64_AM::decodeAdvSIMDModImmType10(RawVal);
   1406   O << format("#%#016llx", Val);
   1407 }
   1408