//===- X86DisassemblerTables.cpp - Disassembler tables ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is part of the X86 Disassembler Emitter.
// It contains the implementation of the disassembler tables.
// Documentation for the disassembler emitter in general can be found in
//  X86DisassemblerEmitter.h.
//
//===----------------------------------------------------------------------===//

#include "X86DisassemblerTables.h"
#include "X86DisassemblerShared.h"
#include "X86ModRMFilters.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <array>
#include <map>

using namespace llvm;
using namespace X86Disassembler;

/// stringForContext - Returns a string containing the name of a particular
///   InstructionContext, usually for diagnostic purposes.
///
/// @param insnContext  - The instruction class to transform to a string.
/// @return           - A statically-allocated string constant that contains the
///                     name of the instruction class.
static inline const char *stringForContext(InstructionContext insnContext) {
  switch (insnContext) {
  default:
    llvm_unreachable("Unhandled instruction class");
#define ENUM_ENTRY(n, r, d)                                                    \
  case n:                                                                      \
    return #n;                                                                 \
    break;
#define ENUM_ENTRY_K_B(n, r, d)                                                \
  ENUM_ENTRY(n, r, d)                                                          \
  ENUM_ENTRY(n##_K_B, r, d)                                                    \
  ENUM_ENTRY(n##_KZ, r, d)                                                     \
  ENUM_ENTRY(n##_K, r, d) ENUM_ENTRY(n##_B, r, d) ENUM_ENTRY(n##_KZ_B, r, d)
    INSTRUCTION_CONTEXTS
#undef ENUM_ENTRY
#undef ENUM_ENTRY_K_B
  }
}

/// stringForOperandType - Like stringForContext, but for OperandTypes.
static inline const char *stringForOperandType(OperandType type) {
  switch (type) {
  default:
    llvm_unreachable("Unhandled type");
#define ENUM_ENTRY(i, d)                                                       \
  case i:                                                                      \
    return #i;
    TYPES
#undef ENUM_ENTRY
  }
}

/// stringForOperandEncoding - like stringForContext, but for
///   OperandEncodings.
static inline const char *stringForOperandEncoding(OperandEncoding encoding) {
  switch (encoding) {
  default:
    llvm_unreachable("Unhandled encoding");
#define ENUM_ENTRY(i, d)                                                       \
  case i:                                                                      \
    return #i;
    ENCODINGS
#undef ENUM_ENTRY
  }
}

/// inheritsFrom - Indicates whether all instructions in one class also belong
///   to another class.
///
/// @param child  - The class that may be the subset
/// @param parent - The class that may be the superset
/// @return       - True if child is a subset of parent, false otherwise.
static inline bool inheritsFrom(InstructionContext child,
                                InstructionContext parent, bool noPrefix = true,
                                bool VEX_LIG = false, bool WIG = false,
                                bool AdSize64 = false) {
  if (child == parent)
    return true;

  switch (parent) {
  case IC:
    return (inheritsFrom(child, IC_64BIT, AdSize64) ||
            (noPrefix && inheritsFrom(child, IC_OPSIZE, noPrefix)) ||
            inheritsFrom(child, IC_ADSIZE) ||
            (noPrefix && inheritsFrom(child, IC_XD, noPrefix)) ||
            (noPrefix && inheritsFrom(child, IC_XS, noPrefix)));
  case IC_64BIT:
    return (inheritsFrom(child, IC_64BIT_REXW) ||
            inheritsFrom(child, IC_64BIT_REX2) ||
            (noPrefix && inheritsFrom(child, IC_64BIT_OPSIZE, noPrefix)) ||
            (!AdSize64 && inheritsFrom(child, IC_64BIT_ADSIZE)) ||
            (noPrefix && inheritsFrom(child, IC_64BIT_XD, noPrefix)) ||
            (noPrefix && inheritsFrom(child, IC_64BIT_XS, noPrefix)));
  case IC_OPSIZE:
    return inheritsFrom(child, IC_64BIT_OPSIZE) ||
           inheritsFrom(child, IC_OPSIZE_ADSIZE);
  case IC_ADSIZE:
    return (noPrefix && inheritsFrom(child, IC_OPSIZE_ADSIZE, noPrefix));
  case IC_OPSIZE_ADSIZE:
    return false;
  case IC_64BIT_ADSIZE:
    return (noPrefix && inheritsFrom(child, IC_64BIT_OPSIZE_ADSIZE, noPrefix));
  case IC_64BIT_OPSIZE_ADSIZE:
    return false;
  case IC_XD:
    return inheritsFrom(child, IC_64BIT_XD);
  case IC_XS:
    return inheritsFrom(child, IC_64BIT_XS);
  case IC_XD_OPSIZE:
    return inheritsFrom(child, IC_64BIT_XD_OPSIZE);
  case IC_XS_OPSIZE:
    return inheritsFrom(child, IC_64BIT_XS_OPSIZE);
  case IC_XD_ADSIZE:
    return inheritsFrom(child, IC_64BIT_XD_ADSIZE);
  case IC_XS_ADSIZE:
    return inheritsFrom(child, IC_64BIT_XS_ADSIZE);
  case IC_64BIT_REXW:
    return ((noPrefix && inheritsFrom(child, IC_64BIT_REXW_XS, noPrefix)) ||
            (noPrefix && inheritsFrom(child, IC_64BIT_REXW_XD, noPrefix)) ||
            (noPrefix && inheritsFrom(child, IC_64BIT_REXW_OPSIZE, noPrefix)) ||
            (!AdSize64 && inheritsFrom(child, IC_64BIT_REXW_ADSIZE)));
  case IC_64BIT_OPSIZE:
    return inheritsFrom(child, IC_64BIT_REXW_OPSIZE) ||
           (!AdSize64 && inheritsFrom(child, IC_64BIT_OPSIZE_ADSIZE)) ||
           (!AdSize64 && inheritsFrom(child, IC_64BIT_REXW_ADSIZE));
  case IC_64BIT_XD:
    return (inheritsFrom(child, IC_64BIT_REXW_XD) ||
            (!AdSize64 && inheritsFrom(child, IC_64BIT_XD_ADSIZE)));
  case IC_64BIT_XS:
    return (inheritsFrom(child, IC_64BIT_REXW_XS) ||
            (!AdSize64 && inheritsFrom(child, IC_64BIT_XS_ADSIZE)));
  case IC_64BIT_XD_OPSIZE:
  case IC_64BIT_XS_OPSIZE:
    return false;
  case IC_64BIT_XD_ADSIZE:
  case IC_64BIT_XS_ADSIZE:
    return false;
  case IC_64BIT_REXW_XD:
  case IC_64BIT_REXW_XS:
  case IC_64BIT_REXW_OPSIZE:
  case IC_64BIT_REXW_ADSIZE:
  case IC_64BIT_REX2_REXW:
    return false;
  case IC_64BIT_REX2:
    return inheritsFrom(child, IC_64BIT_REX2_REXW);
  case IC_VEX:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_VEX_L_W)) ||
           (WIG && inheritsFrom(child, IC_VEX_W)) ||
           (VEX_LIG && inheritsFrom(child, IC_VEX_L));
  case IC_VEX_XS:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_VEX_L_W_XS)) ||
           (WIG && inheritsFrom(child, IC_VEX_W_XS)) ||
           (VEX_LIG && inheritsFrom(child, IC_VEX_L_XS));
  case IC_VEX_XD:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_VEX_L_W_XD)) ||
           (WIG && inheritsFrom(child, IC_VEX_W_XD)) ||
           (VEX_LIG && inheritsFrom(child, IC_VEX_L_XD));
  case IC_VEX_OPSIZE:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_VEX_L_W_OPSIZE)) ||
           (WIG && inheritsFrom(child, IC_VEX_W_OPSIZE)) ||
           (VEX_LIG && inheritsFrom(child, IC_VEX_L_OPSIZE));
  case IC_VEX_W:
    return VEX_LIG && inheritsFrom(child, IC_VEX_L_W);
  case IC_VEX_W_XS:
    return VEX_LIG && inheritsFrom(child, IC_VEX_L_W_XS);
  case IC_VEX_W_XD:
    return VEX_LIG && inheritsFrom(child, IC_VEX_L_W_XD);
  case IC_VEX_W_OPSIZE:
    return VEX_LIG && inheritsFrom(child, IC_VEX_L_W_OPSIZE);
  case IC_VEX_L:
    return WIG && inheritsFrom(child, IC_VEX_L_W);
  case IC_VEX_L_XS:
    return WIG && inheritsFrom(child, IC_VEX_L_W_XS);
  case IC_VEX_L_XD:
    return WIG && inheritsFrom(child, IC_VEX_L_W_XD);
  case IC_VEX_L_OPSIZE:
    return WIG && inheritsFrom(child, IC_VEX_L_W_OPSIZE);
  case IC_VEX_L_W:
  case IC_VEX_L_W_XS:
  case IC_VEX_L_W_XD:
  case IC_VEX_L_W_OPSIZE:
    return false;
  case IC_EVEX:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2));
  case IC_EVEX_XS:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS));
  case IC_EVEX_XD:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD));
  case IC_EVEX_OPSIZE:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE));
  case IC_EVEX_OPSIZE_ADSIZE:
  case IC_EVEX_XS_ADSIZE:
  case IC_EVEX_XD_ADSIZE:
    return false;
  case IC_EVEX_K:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_K)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_K)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_K));
  case IC_EVEX_XS_K:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS_K)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS_K));
  case IC_EVEX_XD_K:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD_K)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD_K));
  case IC_EVEX_OPSIZE_K:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE_K));
  case IC_EVEX_KZ:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_KZ)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_KZ)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_KZ));
  case IC_EVEX_XS_KZ:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS_KZ));
  case IC_EVEX_XD_KZ:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD_KZ));
  case IC_EVEX_OPSIZE_KZ:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE_KZ));
  case IC_EVEX_W:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W)) ||
           inheritsFrom(child, IC_EVEX_W_OPSIZE) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W));
  case IC_EVEX_W_XS:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS));
  case IC_EVEX_W_XD:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD));
  case IC_EVEX_W_OPSIZE:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE));
  case IC_EVEX_W_K:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_K));
  case IC_EVEX_W_XS_K:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K));
  case IC_EVEX_W_XD_K:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K));
  case IC_EVEX_W_OPSIZE_K:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K));
  case IC_EVEX_W_KZ:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_KZ));
  case IC_EVEX_W_XS_KZ:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ));
  case IC_EVEX_W_XD_KZ:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ));
  case IC_EVEX_W_OPSIZE_KZ:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ));
  case IC_EVEX_L:
    return WIG && inheritsFrom(child, IC_EVEX_L_W);
  case IC_EVEX_L_XS:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS);
  case IC_EVEX_L_XD:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD);
  case IC_EVEX_L_OPSIZE:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE);
  case IC_EVEX_L_K:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_K);
  case IC_EVEX_L_XS_K:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS_K);
  case IC_EVEX_L_XD_K:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD_K);
  case IC_EVEX_L_OPSIZE_K:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K);
  case IC_EVEX_L_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_KZ);
  case IC_EVEX_L_XS_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ);
  case IC_EVEX_L_XD_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ);
  case IC_EVEX_L_OPSIZE_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ);
  case IC_EVEX_L_W:
  case IC_EVEX_L_W_XS:
  case IC_EVEX_L_W_XD:
  case IC_EVEX_L_W_OPSIZE:
    return false;
  case IC_EVEX_L_W_K:
  case IC_EVEX_L_W_XS_K:
  case IC_EVEX_L_W_XD_K:
  case IC_EVEX_L_W_OPSIZE_K:
    return false;
  case IC_EVEX_L_W_KZ:
  case IC_EVEX_L_W_XS_KZ:
  case IC_EVEX_L_W_XD_KZ:
  case IC_EVEX_L_W_OPSIZE_KZ:
    return false;
  case IC_EVEX_L2:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W);
  case IC_EVEX_L2_XS:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS);
  case IC_EVEX_L2_XD:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD);
  case IC_EVEX_L2_OPSIZE:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE);
  case IC_EVEX_L2_K:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_K);
  case IC_EVEX_L2_XS_K:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K);
  case IC_EVEX_L2_XD_K:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K);
  case IC_EVEX_L2_OPSIZE_K:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K);
  case IC_EVEX_L2_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_KZ);
  case IC_EVEX_L2_XS_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ);
  case IC_EVEX_L2_XD_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ);
  case IC_EVEX_L2_OPSIZE_KZ:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ);
  case IC_EVEX_L2_W:
  case IC_EVEX_L2_W_XS:
  case IC_EVEX_L2_W_XD:
  case IC_EVEX_L2_W_OPSIZE:
    return false;
  case IC_EVEX_L2_W_K:
  case IC_EVEX_L2_W_XS_K:
  case IC_EVEX_L2_W_XD_K:
  case IC_EVEX_L2_W_OPSIZE_K:
    return false;
  case IC_EVEX_L2_W_KZ:
  case IC_EVEX_L2_W_XS_KZ:
  case IC_EVEX_L2_W_XD_KZ:
  case IC_EVEX_L2_W_OPSIZE_KZ:
    return false;
  case IC_EVEX_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_B));
  case IC_EVEX_XS_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS_B));
  case IC_EVEX_XD_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD_B));
  case IC_EVEX_OPSIZE_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE_B));
  case IC_EVEX_K_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_K_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_K_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_K_B));
  case IC_EVEX_XS_K_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS_K_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS_K_B));
  case IC_EVEX_XD_K_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD_K_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD_K_B));
  case IC_EVEX_OPSIZE_K_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE_K_B));
  case IC_EVEX_KZ_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_KZ_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_KZ_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_KZ_B));
  case IC_EVEX_XS_KZ_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XS_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XS_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XS_KZ_B));
  case IC_EVEX_XD_KZ_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_XD_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_XD_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_XD_KZ_B));
  case IC_EVEX_OPSIZE_KZ_B:
    return (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ_B)) ||
           (VEX_LIG && WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ_B)) ||
           (WIG && inheritsFrom(child, IC_EVEX_W_OPSIZE_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L_OPSIZE_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_OPSIZE_KZ_B));
  case IC_EVEX_W_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_B)) ||
           inheritsFrom(child, IC_EVEX_W_OPSIZE_B) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_B));
  case IC_EVEX_W_XS_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS_B));
  case IC_EVEX_W_XD_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD_B));
  case IC_EVEX_W_OPSIZE_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_B));
  case IC_EVEX_W_K_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_K_B));
  case IC_EVEX_W_XS_K_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K_B));
  case IC_EVEX_W_XD_K_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K_B));
  case IC_EVEX_W_OPSIZE_K_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K_B));
  case IC_EVEX_W_KZ_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_KZ_B));
  case IC_EVEX_W_XS_KZ_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ_B));
  case IC_EVEX_W_XD_KZ_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ_B));
  case IC_EVEX_W_OPSIZE_KZ_B:
    return (VEX_LIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ_B)) ||
           (VEX_LIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ_B));
  case IC_EVEX_L_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_B);
  case IC_EVEX_L_XS_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS_B);
  case IC_EVEX_L_XD_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD_B);
  case IC_EVEX_L_OPSIZE_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_B);
  case IC_EVEX_L_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_K_B);
  case IC_EVEX_L_XS_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS_K_B);
  case IC_EVEX_L_XD_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD_K_B);
  case IC_EVEX_L_OPSIZE_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_K_B);
  case IC_EVEX_L_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_KZ_B);
  case IC_EVEX_L_XS_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XS_KZ_B);
  case IC_EVEX_L_XD_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_XD_KZ_B);
  case IC_EVEX_L_OPSIZE_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L_W_OPSIZE_KZ_B);
  case IC_EVEX_L_W_B:
  case IC_EVEX_L_W_XS_B:
  case IC_EVEX_L_W_XD_B:
  case IC_EVEX_L_W_OPSIZE_B:
    return false;
  case IC_EVEX_L_W_K_B:
  case IC_EVEX_L_W_XS_K_B:
  case IC_EVEX_L_W_XD_K_B:
  case IC_EVEX_L_W_OPSIZE_K_B:
    return false;
  case IC_EVEX_L_W_KZ_B:
  case IC_EVEX_L_W_XS_KZ_B:
  case IC_EVEX_L_W_XD_KZ_B:
  case IC_EVEX_L_W_OPSIZE_KZ_B:
    return false;
  case IC_EVEX_L2_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_B);
  case IC_EVEX_L2_XS_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_B);
  case IC_EVEX_L2_XD_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_B);
  case IC_EVEX_L2_OPSIZE_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_B);
  case IC_EVEX_L2_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_K_B);
  case IC_EVEX_L2_XS_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_K_B);
  case IC_EVEX_L2_XD_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_K_B);
  case IC_EVEX_L2_OPSIZE_K_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_K_B);
  case IC_EVEX_L2_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_KZ_B);
  case IC_EVEX_L2_XS_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XS_KZ_B);
  case IC_EVEX_L2_XD_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_XD_KZ_B);
  case IC_EVEX_L2_OPSIZE_KZ_B:
    return WIG && inheritsFrom(child, IC_EVEX_L2_W_OPSIZE_KZ_B);
  case IC_EVEX_L2_W_B:
  case IC_EVEX_L2_W_XS_B:
  case IC_EVEX_L2_W_XD_B:
  case IC_EVEX_L2_W_OPSIZE_B:
    return false;
  case IC_EVEX_L2_W_K_B:
  case IC_EVEX_L2_W_XS_K_B:
  case IC_EVEX_L2_W_XD_K_B:
  case IC_EVEX_L2_W_OPSIZE_K_B:
    return false;
  case IC_EVEX_L2_W_KZ_B:
  case IC_EVEX_L2_W_XS_KZ_B:
  case IC_EVEX_L2_W_XD_KZ_B:
  case IC_EVEX_L2_W_OPSIZE_KZ_B:
    return false;
  case IC_EVEX_NF:
    return WIG && inheritsFrom(child, IC_EVEX_W_NF);
  case IC_EVEX_B_NF:
    return WIG && inheritsFrom(child, IC_EVEX_W_B_NF);
  case IC_EVEX_OPSIZE_NF:
  case IC_EVEX_OPSIZE_B_NF:
  case IC_EVEX_W_NF:
  case IC_EVEX_W_B_NF:
    return false;
  case IC_EVEX_B_U:
  case IC_EVEX_XS_B_U:
  case IC_EVEX_XD_B_U:
  case IC_EVEX_OPSIZE_B_U:
  case IC_EVEX_W_B_U:
  case IC_EVEX_W_XS_B_U:
  case IC_EVEX_W_XD_B_U:
  case IC_EVEX_W_OPSIZE_B_U:
  case IC_EVEX_K_B_U:
  case IC_EVEX_XS_K_B_U:
  case IC_EVEX_XD_K_B_U:
  case IC_EVEX_OPSIZE_K_B_U:
  case IC_EVEX_W_K_B_U:
  case IC_EVEX_W_XS_K_B_U:
  case IC_EVEX_W_XD_K_B_U:
  case IC_EVEX_W_OPSIZE_K_B_U:
  case IC_EVEX_KZ_B_U:
  case IC_EVEX_XS_KZ_B_U:
  case IC_EVEX_XD_KZ_B_U:
  case IC_EVEX_OPSIZE_KZ_B_U:
  case IC_EVEX_W_KZ_B_U:
  case IC_EVEX_W_XS_KZ_B_U:
  case IC_EVEX_W_XD_KZ_B_U:
  case IC_EVEX_W_OPSIZE_KZ_B_U:
    return false;
  default:
    errs() << "Unknown instruction class: " << stringForContext(parent) << "\n";
    llvm_unreachable("Unknown instruction class");
  }
}

/// outranks - Indicates whether, if an instruction has two different applicable
///   classes, which class should be preferred when performing decode.  This
///   imposes a total ordering (ties are resolved toward "lower")
///
/// @param upper  - The class that may be preferable
/// @param lower  - The class that may be less preferable
/// @return       - True if upper is to be preferred, false otherwise.
static inline bool outranks(InstructionContext upper,
                            InstructionContext lower) {
  assert(upper < IC_max);
  assert(lower < IC_max);

#define ENUM_ENTRY(n, r, d) r,
#define ENUM_ENTRY_K_B(n, r, d)                                                \
  ENUM_ENTRY(n, r, d)                                                          \
  ENUM_ENTRY(n##_K_B, r, d)                                                    \
  ENUM_ENTRY(n##_KZ_B, r, d)                                                   \
  ENUM_ENTRY(n##_KZ, r, d) ENUM_ENTRY(n##_K, r, d) ENUM_ENTRY(n##_B, r, d)
  static int ranks[IC_max] = {INSTRUCTION_CONTEXTS};
#undef ENUM_ENTRY
#undef ENUM_ENTRY_K_B

  return (ranks[upper] > ranks[lower]);
}

/// getDecisionType - Determines whether a ModRM decision with 255 entries can
///   be compacted by eliminating redundant information.
///
/// @param decision - The decision to be compacted.
/// @return         - The compactest available representation for the decision.
static ModRMDecisionType getDecisionType(const ModRMDecision &decision) {
  bool satisfiesOneEntry = true;
  bool satisfiesSplitRM = true;
  bool satisfiesSplitReg = true;
  bool satisfiesSplitMisc = true;

  for (unsigned index = 0; index < 256; ++index) {
    if (decision.instructionIDs[index] != decision.instructionIDs[0])
      satisfiesOneEntry = false;

    if (((index & 0xc0) == 0xc0) &&
        (decision.instructionIDs[index] != decision.instructionIDs[0xc0]))
      satisfiesSplitRM = false;

    if (((index & 0xc0) != 0xc0) &&
        (decision.instructionIDs[index] != decision.instructionIDs[0x00]))
      satisfiesSplitRM = false;

    if (((index & 0xc0) == 0xc0) && (decision.instructionIDs[index] !=
                                     decision.instructionIDs[index & 0xf8]))
      satisfiesSplitReg = false;

    if (((index & 0xc0) != 0xc0) && (decision.instructionIDs[index] !=
                                     decision.instructionIDs[index & 0x38]))
      satisfiesSplitMisc = false;
  }

  if (satisfiesOneEntry)
    return MODRM_ONEENTRY;

  if (satisfiesSplitRM)
    return MODRM_SPLITRM;

  if (satisfiesSplitReg && satisfiesSplitMisc)
    return MODRM_SPLITREG;

  if (satisfiesSplitMisc)
    return MODRM_SPLITMISC;

  return MODRM_FULL;
}

/// stringForDecisionType - Returns a statically-allocated string corresponding
///   to a particular decision type.
///
/// @param dt - The decision type.
/// @return   - A pointer to the statically-allocated string (e.g.,
///             "MODRM_ONEENTRY" for MODRM_ONEENTRY).
static const char *stringForDecisionType(ModRMDecisionType dt) {
#define ENUM_ENTRY(n)                                                          \
  case n:                                                                      \
    return #n;
  switch (dt) {
  default:
    llvm_unreachable("Unknown decision type");
    MODRMTYPES
  };
#undef ENUM_ENTRY
}

DisassemblerTables::DisassemblerTables() {
  for (unsigned i = 0; i < std::size(Tables); i++)
    Tables[i] = std::make_unique<ContextDecision>();

  HasConflicts = false;
}

DisassemblerTables::~DisassemblerTables() = default;

void DisassemblerTables::emitModRMDecision(raw_ostream &o1, raw_ostream &o2,
                                           unsigned &i1, unsigned &i2,
                                           unsigned &ModRMTableNum,
                                           ModRMDecision &decision) const {
  static uint64_t sEntryNumber = 1;
  ModRMDecisionType dt = getDecisionType(decision);

  if (dt == MODRM_ONEENTRY && decision.instructionIDs[0] == 0) {
    // Empty table.
    o2 << "{" << stringForDecisionType(dt) << ", 0}";
    return;
  }

  std::vector<unsigned> ModRMDecision;

  switch (dt) {
  default:
    llvm_unreachable("Unknown decision type");
  case MODRM_ONEENTRY:
    ModRMDecision.push_back(decision.instructionIDs[0]);
    break;
  case MODRM_SPLITRM:
    ModRMDecision.push_back(decision.instructionIDs[0x00]);
    ModRMDecision.push_back(decision.instructionIDs[0xc0]);
    break;
  case MODRM_SPLITREG:
    for (unsigned index = 0; index < 64; index += 8)
      ModRMDecision.push_back(decision.instructionIDs[index]);
    for (unsigned index = 0xc0; index < 256; index += 8)
      ModRMDecision.push_back(decision.instructionIDs[index]);
    break;
  case MODRM_SPLITMISC:
    for (unsigned index = 0; index < 64; index += 8)
      ModRMDecision.push_back(decision.instructionIDs[index]);
    for (unsigned index = 0xc0; index < 256; ++index)
      ModRMDecision.push_back(decision.instructionIDs[index]);
    break;
  case MODRM_FULL:
    llvm::append_range(ModRMDecision, decision.instructionIDs);
    break;
  }

  unsigned &EntryNumber = ModRMTable[ModRMDecision];
  if (EntryNumber == 0) {
    EntryNumber = ModRMTableNum;

    ModRMTableNum += ModRMDecision.size();
    o1 << "/*Table" << EntryNumber << "*/\n";
    i1++;
    for (unsigned I : ModRMDecision) {
      o1.indent(i1 * 2) << format("0x%hx", I) << ", /*"
                        << InstructionSpecifiers[I].name << "*/\n";
    }
    i1--;
  }

  o2 << "{" << stringForDecisionType(dt) << ", " << EntryNumber << "}";

  switch (dt) {
  default:
    llvm_unreachable("Unknown decision type");
  case MODRM_ONEENTRY:
    sEntryNumber += 1;
    break;
  case MODRM_SPLITRM:
    sEntryNumber += 2;
    break;
  case MODRM_SPLITREG:
    sEntryNumber += 16;
    break;
  case MODRM_SPLITMISC:
    sEntryNumber += 8 + 64;
    break;
  case MODRM_FULL:
    sEntryNumber += 256;
    break;
  }

  // We assume that the index can fit into uint32_t.
  assert(sEntryNumber < -1U &&
         "Index into ModRMDecision is too large for uint32_t!");
  (void)sEntryNumber;
}

void DisassemblerTables::emitOpcodeDecision(raw_ostream &o1, raw_ostream &o2,
                                            unsigned &i1, unsigned &i2,
                                            unsigned &ModRMTableNum,
                                            OpcodeDecision &opDecision) const {
  o2 << "{";
  ++i2;

  unsigned index;
  for (index = 0; index < 256; ++index) {
    auto &decision = opDecision.modRMDecisions[index];
    ModRMDecisionType dt = getDecisionType(decision);
    if (!(dt == MODRM_ONEENTRY && decision.instructionIDs[0] == 0))
      break;
  }
  if (index == 256) {
    // If all 256 entries are MODRM_ONEENTRY, omit output.
    static_assert(MODRM_ONEENTRY == 0);
    --i2;
    o2 << "},\n";
  } else {
    o2 << " /* struct OpcodeDecision */ {\n";
    for (index = 0; index < 256; ++index) {
      o2.indent(i2);

      o2 << "/*0x" << format("%02hhx", index) << "*/";

      emitModRMDecision(o1, o2, i1, i2, ModRMTableNum,
                        opDecision.modRMDecisions[index]);

      if (index < 255)
        o2 << ",";

      o2 << "\n";
    }
    o2.indent(i2) << "}\n";
    --i2;
    o2.indent(i2) << "},\n";
  }
}

void DisassemblerTables::emitContextDecision(raw_ostream &o1, raw_ostream &o2,
                                             unsigned &i1, unsigned &i2,
                                             unsigned &ModRMTableNum,
                                             ContextDecision &decision,
                                             const char *name) const {
  o2.indent(i2) << "static const struct ContextDecision " << name
                << " = {{/* opcodeDecisions */\n";
  i2++;

  for (unsigned index = 0; index < IC_max; ++index) {
    o2.indent(i2) << "/*";
    o2 << stringForContext((InstructionContext)index);
    o2 << "*/ ";
    emitOpcodeDecision(o1, o2, i1, i2, ModRMTableNum,
                       decision.opcodeDecisions[index]);
  }

  i2--;
  o2.indent(i2) << "}};"
                << "\n";
}

void DisassemblerTables::emitInstructionInfo(raw_ostream &o,
                                             unsigned &i) const {
  unsigned NumInstructions = InstructionSpecifiers.size();

  o << "static const struct OperandSpecifier x86OperandSets[]["
    << X86_MAX_OPERANDS << "] = {\n";

  using OperandListTy =
      SmallVector<std::pair<OperandEncoding, OperandType>, X86_MAX_OPERANDS>;
  std::map<OperandListTy, unsigned> OperandSets;

  unsigned OperandSetNum = 0;
  for (unsigned Index = 0; Index < NumInstructions; ++Index) {
    OperandListTy OperandList;

    for (auto Operand : InstructionSpecifiers[Index].operands) {
      OperandEncoding Encoding = (OperandEncoding)Operand.encoding;
      OperandType Type = (OperandType)Operand.type;
      OperandList.emplace_back(Encoding, Type);
    }
    unsigned &N = OperandSets[OperandList];
    if (N != 0)
      continue;

    N = ++OperandSetNum;

    o << "  { /* " << (OperandSetNum - 1) << " */\n";
    for (const auto &[Enc, Ty] : OperandList) {
      const char *Encoding = stringForOperandEncoding(Enc);
      const char *Type = stringForOperandType(Ty);
      o << "    { " << Encoding << ", " << Type << " },\n";
    }
    o << "  },\n";
  }
  o << "};"
    << "\n\n";

  o.indent(i * 2) << "static const struct InstructionSpecifier ";
  o << INSTRUCTIONS_STR "[" << InstructionSpecifiers.size() << "] = {\n";

  i++;

  for (unsigned index = 0; index < NumInstructions; ++index) {
    o.indent(i * 2) << "{ /* " << index << " */\n";
    i++;

    OperandListTy OperandList;
    for (auto Operand : InstructionSpecifiers[index].operands) {
      OperandEncoding Encoding = (OperandEncoding)Operand.encoding;
      OperandType Type = (OperandType)Operand.type;
      OperandList.emplace_back(Encoding, Type);
    }
    o.indent(i * 2) << (OperandSets[OperandList] - 1) << ",\n";

    o.indent(i * 2) << "/* " << InstructionSpecifiers[index].name << " */\n";

    i--;
    o.indent(i * 2) << "},\n";
  }

  i--;
  o.indent(i * 2) << "};"
                  << "\n";
}

void DisassemblerTables::emitContextTable(raw_ostream &o, unsigned &i) const {
  o.indent(i * 2) << "static const uint8_t " CONTEXTS_STR "[" << ATTR_max
                  << "] = {\n";
  i++;

  for (unsigned index = 0; index < ATTR_max; ++index) {
    o.indent(i * 2);

    if ((index & ATTR_EVEX) && (index & ATTR_ADSIZE) && (index & ATTR_OPSIZE))
      o << "IC_EVEX_OPSIZE_ADSIZE";
    else if ((index & ATTR_EVEX) && (index & ATTR_ADSIZE) && (index & ATTR_XD))
      o << "IC_EVEX_XD_ADSIZE";
    else if ((index & ATTR_EVEX) && (index & ATTR_ADSIZE) && (index & ATTR_XS))
      o << "IC_EVEX_XS_ADSIZE";
    else if (index & ATTR_EVEXNF) {
      o << "IC_EVEX";
      if (index & ATTR_REXW)
        o << "_W";
      else if (index & ATTR_OPSIZE)
        o << "_OPSIZE";

      if (index & ATTR_EVEXB)
        o << "_B";

      o << "_NF";
    } else if ((index & ATTR_EVEX) || (index & ATTR_VEX) ||
               (index & ATTR_VEXL)) {
      if (index & ATTR_EVEX)
        o << "IC_EVEX";
      else
        o << "IC_VEX";

      if ((index & ATTR_EVEXB) && (index & ATTR_EVEXU))
        ; // Ignore ATTR_VEXL and ATTR_EVEXL2 under YMM rounding.
      else if ((index & ATTR_EVEX) && (index & ATTR_EVEXL2))
        o << "_L2";
      else if (index & ATTR_VEXL)
        o << "_L";

      if (index & ATTR_REXW)
        o << "_W";

      if (index & ATTR_OPSIZE)
        o << "_OPSIZE";
      else if (index & ATTR_XD)
        o << "_XD";
      else if (index & ATTR_XS)
        o << "_XS";

      if (index & ATTR_EVEX) {
        if (index & ATTR_EVEXKZ)
          o << "_KZ";
        else if (index & ATTR_EVEXK)
          o << "_K";

        if (index & ATTR_EVEXB)
          o << "_B";

        if ((index & ATTR_EVEXB) && (index & ATTR_EVEXU))
          o << "_U";
      }
    } else if ((index & ATTR_64BIT) && (index & ATTR_REX2)) {
      o << "IC_64BIT_REX2";
      if (index & ATTR_REXW)
        o << "_REXW";
    } else if ((index & ATTR_64BIT) && (index & ATTR_REXW) && (index & ATTR_XS))
      o << "IC_64BIT_REXW_XS";
    else if ((index & ATTR_64BIT) && (index & ATTR_REXW) && (index & ATTR_XD))
      o << "IC_64BIT_REXW_XD";
    else if ((index & ATTR_64BIT) && (index & ATTR_REXW) &&
             (index & ATTR_OPSIZE))
      o << "IC_64BIT_REXW_OPSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_REXW) &&
             (index & ATTR_ADSIZE))
      o << "IC_64BIT_REXW_ADSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_XD) && (index & ATTR_OPSIZE))
      o << "IC_64BIT_XD_OPSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_XD) && (index & ATTR_ADSIZE))
      o << "IC_64BIT_XD_ADSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_XS) && (index & ATTR_OPSIZE))
      o << "IC_64BIT_XS_OPSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_XS) && (index & ATTR_ADSIZE))
      o << "IC_64BIT_XS_ADSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_XS))
      o << "IC_64BIT_XS";
    else if ((index & ATTR_64BIT) && (index & ATTR_XD))
      o << "IC_64BIT_XD";
    else if ((index & ATTR_64BIT) && (index & ATTR_OPSIZE) &&
             (index & ATTR_ADSIZE))
      o << "IC_64BIT_OPSIZE_ADSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_OPSIZE))
      o << "IC_64BIT_OPSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_ADSIZE))
      o << "IC_64BIT_ADSIZE";
    else if ((index & ATTR_64BIT) && (index & ATTR_REXW))
      o << "IC_64BIT_REXW";
    else if ((index & ATTR_64BIT))
      o << "IC_64BIT";
    else if ((index & ATTR_XS) && (index & ATTR_OPSIZE))
      o << "IC_XS_OPSIZE";
    else if ((index & ATTR_XD) && (index & ATTR_OPSIZE))
      o << "IC_XD_OPSIZE";
    else if ((index & ATTR_XS) && (index & ATTR_ADSIZE))
      o << "IC_XS_ADSIZE";
    else if ((index & ATTR_XD) && (index & ATTR_ADSIZE))
      o << "IC_XD_ADSIZE";
    else if (index & ATTR_XS)
      o << "IC_XS";
    else if (index & ATTR_XD)
      o << "IC_XD";
    else if ((index & ATTR_OPSIZE) && (index & ATTR_ADSIZE))
      o << "IC_OPSIZE_ADSIZE";
    else if (index & ATTR_OPSIZE)
      o << "IC_OPSIZE";
    else if (index & ATTR_ADSIZE)
      o << "IC_ADSIZE";
    else
      o << "IC";

    o << ", // " << index << "\n";
  }

  i--;
  o.indent(i * 2) << "};"
                  << "\n";
}

void DisassemblerTables::emitContextDecisions(raw_ostream &o1, raw_ostream &o2,
                                              unsigned &i1, unsigned &i2,
                                              unsigned &ModRMTableNum) const {
  emitContextDecision(o1, o2, i1, i2, ModRMTableNum, *Tables[ONEBYTE],
                      ONEBYTE_STR);
  emitContextDecision(o1, o2, i1, i2, ModRMTableNum, *Tables[TWOBYTE],
                      TWOBYTE_STR);
  emitContextDecision(o1, o2, i1, i2, ModRMTableNum, *Tables[THREEBYTE_38],
                      THREEBYTE38_STR);
  emitContextDecision(o1, o2, i1, i2, ModRMTableNum, *Tables[THREEBYTE_3A],
                      THREEBYTE3A_STR);

  using OpcodeDecisionKey = std::vector<uint16_t>;
  std::map<OpcodeDecisionKey, unsigned> OpcodeDecisionMap;
  static_assert(XOP8_MAP == 4 && MAP7 == 11);
  std::array<std::array<unsigned, IC_max>, MAP7 - XOP8_MAP + 1> Indices;

  o2 << "static const struct OpcodeDecision " SPARSE_OPCODE_DECISIONS_STR
        "[] = {\n";
  ++i2;

  for (unsigned TableIndex = XOP8_MAP; TableIndex <= MAP7; ++TableIndex) {
    for (unsigned ContextIndex = 0; ContextIndex < IC_max; ++ContextIndex) {
      OpcodeDecision &Decision =
          Tables[TableIndex]->opcodeDecisions[ContextIndex];
      OpcodeDecisionKey Key;

      for (const ModRMDecision &ModRM : Decision.modRMDecisions) {
        ModRMDecisionType Type = getDecisionType(ModRM);
        Key.push_back(Type);

        switch (Type) {
        default:
          llvm_unreachable("Unknown decision type");
        case MODRM_ONEENTRY:
          Key.push_back(ModRM.instructionIDs[0]);
          break;
        case MODRM_SPLITRM:
          Key.push_back(ModRM.instructionIDs[0x00]);
          Key.push_back(ModRM.instructionIDs[0xc0]);
          break;
        case MODRM_SPLITREG:
          for (unsigned Index = 0; Index < 64; Index += 8)
            Key.push_back(ModRM.instructionIDs[Index]);
          for (unsigned Index = 0xc0; Index < 256; Index += 8)
            Key.push_back(ModRM.instructionIDs[Index]);
          break;
        case MODRM_SPLITMISC:
          for (unsigned Index = 0; Index < 64; Index += 8)
            Key.push_back(ModRM.instructionIDs[Index]);
          for (unsigned Index = 0xc0; Index < 256; ++Index)
            Key.push_back(ModRM.instructionIDs[Index]);
          break;
        case MODRM_FULL:
          llvm::append_range(Key, ModRM.instructionIDs);
          break;
        }
      }

      auto [It, Inserted] = OpcodeDecisionMap.try_emplace(
          std::move(Key), OpcodeDecisionMap.size());
      Indices[TableIndex - XOP8_MAP][ContextIndex] = It->second;
      if (Inserted)
        emitOpcodeDecision(o1, o2, i1, i2, ModRMTableNum, Decision);
    }
  }

  --i2;
  o2 << "};\n\n";

  assert(OpcodeDecisionMap.size() <= UINT16_MAX &&
         "Too many unique sparse opcode decisions");
  o2 << "static const uint16_t " SPARSE_OPCODE_DECISION_INDICES_STR
        "[][IC_max] = {\n";
  ++i2;
  for (const auto &Table : Indices) {
    o2.indent(i2) << "{\n";
    ++i2;
    for (auto [ContextIndex, DecisionIndex] : enumerate(Table)) {
      o2.indent(i2) << DecisionIndex << ", // "
                    << stringForContext(InstructionContext(ContextIndex))
                    << "\n";
    }
    --i2;
    o2.indent(i2) << "},\n";
  }
  --i2;
  o2 << "};\n";
}

void DisassemblerTables::emit(raw_ostream &o) const {
  unsigned i1 = 0;
  unsigned i2 = 0;

  std::string s1;
  std::string s2;

  raw_string_ostream o1(s1);
  raw_string_ostream o2(s2);

  emitInstructionInfo(o, i2);
  o << "\n";

  emitContextTable(o, i2);
  o << "\n";

  unsigned ModRMTableNum = 0;

  o << "static const InstrUID modRMTable[] = {\n";
  i1++;
  std::vector<unsigned> EmptyTable(1, 0);
  ModRMTable[EmptyTable] = ModRMTableNum;
  ModRMTableNum += EmptyTable.size();
  o1 << "/*EmptyTable*/\n";
  o1.indent(i1 * 2) << "0x0,\n";
  i1--;
  emitContextDecisions(o1, o2, i1, i2, ModRMTableNum);

  o << s1;
  o << "  0x0\n";
  o << "};\n";
  o << "\n";
  o << s2;
  o << "\n";
  o << "\n";
}

void DisassemblerTables::setTableFields(ModRMDecision &decision,
                                        const ModRMFilter &filter, InstrUID uid,
                                        uint8_t opcode) {
  for (unsigned index = 0; index < 256; ++index) {
    if (filter.accepts(index)) {
      if (decision.instructionIDs[index] == uid)
        continue;

      if (decision.instructionIDs[index] != 0) {
        InstructionSpecifier &newInfo = InstructionSpecifiers[uid];
        InstructionSpecifier &previousInfo =
            InstructionSpecifiers[decision.instructionIDs[index]];

        if (previousInfo.name == "NOOP" &&
            (newInfo.name == "XCHG16ar" || newInfo.name == "XCHG32ar" ||
             newInfo.name == "XCHG64ar"))
          continue; // special case for XCHG*ar and NOOP

        if (outranks(previousInfo.insnContext, newInfo.insnContext))
          continue;

        if (previousInfo.insnContext == newInfo.insnContext) {
          errs() << "Error: Primary decode conflict: ";
          errs() << newInfo.name << " would overwrite " << previousInfo.name;
          errs() << "\n";
          errs() << "ModRM   " << index << "\n";
          errs() << "Opcode  " << (uint16_t)opcode << "\n";
          errs() << "Context " << stringForContext(newInfo.insnContext) << "\n";
          HasConflicts = true;
        }
      }

      decision.instructionIDs[index] = uid;
    }
  }
}

void DisassemblerTables::setTableFields(
    OpcodeType type, InstructionContext insnContext, uint8_t opcode,
    const ModRMFilter &filter, InstrUID uid, bool is32bit, bool noPrefix,
    bool ignoresVEX_L, bool ignoresW, unsigned addressSize) {
  ContextDecision &decision = *Tables[type];

  for (unsigned index = 0; index < IC_max; ++index) {
    if ((is32bit || addressSize == 16) &&
        inheritsFrom((InstructionContext)index, IC_64BIT))
      continue;

    bool adSize64 = addressSize == 64;
    if (inheritsFrom((InstructionContext)index,
                     InstructionSpecifiers[uid].insnContext, noPrefix,
                     ignoresVEX_L, ignoresW, adSize64))
      setTableFields(decision.opcodeDecisions[index].modRMDecisions[opcode],
                     filter, uid, opcode);
  }
}