Revert of [interpreter] Reduce dependencies in bytecodes.{h,cc}

src/interpreter/bytecode-decoder.cc

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "src/interpreter/bytecode-decoder.h"
-
-#include <iomanip>
-
-#include "src/utils.h"
-
-namespace v8 {
-namespace internal {
-namespace interpreter {
-
-// static
-Register BytecodeDecoder::DecodeRegisterOperand(const uint8_t* operand_start,
-                                                OperandType operand_type,
-                                                OperandScale operand_scale) {
-  DCHECK(Bytecodes::IsRegisterOperandType(operand_type));
-  int32_t operand =
-      DecodeSignedOperand(operand_start, operand_type, operand_scale);
-  return Register::FromOperand(operand);
-}
-
-// static
-int32_t BytecodeDecoder::DecodeSignedOperand(const uint8_t* operand_start,
-                                             OperandType operand_type,
-                                             OperandScale operand_scale) {
-  DCHECK(!Bytecodes::IsUnsignedOperandType(operand_type));
-  switch (Bytecodes::SizeOfOperand(operand_type, operand_scale)) {
-    case OperandSize::kByte:
-      return static_cast<int8_t>(*operand_start);
-    case OperandSize::kShort:
-      return static_cast<int16_t>(ReadUnalignedUInt16(operand_start));
-    case OperandSize::kQuad:
-      return static_cast<int32_t>(ReadUnalignedUInt32(operand_start));
-    case OperandSize::kNone:
-      UNREACHABLE();
-  }
-  return 0;
-}
-
-// static
-uint32_t BytecodeDecoder::DecodeUnsignedOperand(const uint8_t* operand_start,
-                                                OperandType operand_type,
-                                                OperandScale operand_scale) {
-  DCHECK(Bytecodes::IsUnsignedOperandType(operand_type));
-  switch (Bytecodes::SizeOfOperand(operand_type, operand_scale)) {
-    case OperandSize::kByte:
-      return *operand_start;
-    case OperandSize::kShort:
-      return ReadUnalignedUInt16(operand_start);
-    case OperandSize::kQuad:
-      return ReadUnalignedUInt32(operand_start);
-    case OperandSize::kNone:
-      UNREACHABLE();
-  }
-  return 0;
-}
-
-// static
-std::ostream& BytecodeDecoder::Decode(std::ostream& os,
-                                      const uint8_t* bytecode_start,
-                                      int parameter_count) {
-  Bytecode bytecode = Bytecodes::FromByte(bytecode_start[0]);
-  int prefix_offset = 0;
-  OperandScale operand_scale = OperandScale::kSingle;
-  if (Bytecodes::IsPrefixScalingBytecode(bytecode)) {
-    prefix_offset = 1;
-    operand_scale = Bytecodes::PrefixBytecodeToOperandScale(bytecode);
-    bytecode = Bytecodes::FromByte(bytecode_start[1]);
-  }
-
-  // Prepare to print bytecode and operands as hex digits.
-  std::ios saved_format(nullptr);
-  saved_format.copyfmt(saved_format);
-  os.fill('0');
-  os.flags(std::ios::hex);
-
-  int bytecode_size = Bytecodes::Size(bytecode, operand_scale);
-  for (int i = 0; i < prefix_offset + bytecode_size; i++) {
-    os << std::setw(2) << static_cast<uint32_t>(bytecode_start[i]) << ' ';
-  }
-  os.copyfmt(saved_format);
-
-  const int kBytecodeColumnSize = 6;
-  for (int i = prefix_offset + bytecode_size; i < kBytecodeColumnSize; i++) {
-    os << "   ";
-  }
-
-  os << Bytecodes::ToString(bytecode, operand_scale) << " ";
-
-  // Operands for the debug break are from the original instruction.
-  if (Bytecodes::IsDebugBreak(bytecode)) return os;
-
-  int number_of_operands = Bytecodes::NumberOfOperands(bytecode);
-  int range = 0;
-  for (int i = 0; i < number_of_operands; i++) {
-    OperandType op_type = Bytecodes::GetOperandType(bytecode, i);
-    int operand_offset =
-        Bytecodes::GetOperandOffset(bytecode, i, operand_scale);
-    const uint8_t* operand_start =
-        &bytecode_start[prefix_offset + operand_offset];
-    switch (op_type) {
-      case interpreter::OperandType::kRegCount:
-        os << "#"
-           << DecodeUnsignedOperand(operand_start, op_type, operand_scale);
-        break;
-      case interpreter::OperandType::kIdx:
-      case interpreter::OperandType::kRuntimeId:
-      case interpreter::OperandType::kIntrinsicId:
-        os << "["
-           << DecodeUnsignedOperand(operand_start, op_type, operand_scale)
-           << "]";
-        break;
-      case interpreter::OperandType::kImm:
-        os << "[" << DecodeSignedOperand(operand_start, op_type, operand_scale)
-           << "]";
-        break;
-      case interpreter::OperandType::kFlag8:
-        os << "#"
-           << DecodeUnsignedOperand(operand_start, op_type, operand_scale);
-        break;
-      case interpreter::OperandType::kMaybeReg:
-      case interpreter::OperandType::kReg:
-      case interpreter::OperandType::kRegOut: {
-        Register reg =
-            DecodeRegisterOperand(operand_start, op_type, operand_scale);
-        os << reg.ToString(parameter_count);
-        break;
-      }
-      case interpreter::OperandType::kRegOutTriple:
-        range += 1;
-      case interpreter::OperandType::kRegOutPair:
-      case interpreter::OperandType::kRegPair: {
-        range += 1;
-        Register first_reg =
-            DecodeRegisterOperand(operand_start, op_type, operand_scale);
-        Register last_reg = Register(first_reg.index() + range);
-        os << first_reg.ToString(parameter_count) << "-"
-           << last_reg.ToString(parameter_count);
-        break;
-      }
-      case interpreter::OperandType::kNone:
-        UNREACHABLE();
-        break;
-    }
-    if (i != number_of_operands - 1) {
-      os << ", ";
-    }
-  }
-  return os;
-}
-
-}  // namespace interpreter
-}  // namespace internal
-}  // namespace v8