Reland "[interpreter] Reduce dependencies in bytecodes.{h,cc}"

src/interpreter/bytecodes.h

 // 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.
 
 #ifndef V8_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
+#include <cstdint>
 #include <iosfwd>
+#include <string>
 
-// Clients of this interface shouldn't depend on lots of interpreter internals.
-// Do not include anything from src/interpreter here!
-#include "src/frames.h"
-#include "src/utils.h"
+// This interface and it's implementation are independent of the
+// libv8_base library as they are used by the interpreter and the
+// standalone mkpeephole table generator program.
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 #define INVALID_OPERAND_TYPE_LIST(V) V(None, OperandTypeInfo::kNone)
 
 #define REGISTER_INPUT_OPERAND_TYPE_LIST(V)         \
   V(MaybeReg, OperandTypeInfo::kScalableSignedByte) \
   V(Reg, OperandTypeInfo::kScalableSignedByte)      \
@@ skipping 255 matching lines @@
   /* eliminated bytecodes). */                                                 \
   V(Nop, AccumulatorUse::kNone)
 
 enum class AccumulatorUse : uint8_t {
   kNone = 0,
   kRead = 1 << 0,
   kWrite = 1 << 1,
   kReadWrite = kRead | kWrite
 };
 
-V8_INLINE AccumulatorUse operator&(AccumulatorUse lhs, AccumulatorUse rhs) {
+inline AccumulatorUse operator&(AccumulatorUse lhs, AccumulatorUse rhs) {
   int result = static_cast<int>(lhs) & static_cast<int>(rhs);
   return static_cast<AccumulatorUse>(result);
 }
 
-V8_INLINE AccumulatorUse operator|(AccumulatorUse lhs, AccumulatorUse rhs) {
+inline AccumulatorUse operator|(AccumulatorUse lhs, AccumulatorUse rhs) {
   int result = static_cast<int>(lhs) | static_cast<int>(rhs);
   return static_cast<AccumulatorUse>(result);
 }
 
 // Enumeration of scaling factors applicable to scalable operands. Code
 // relies on being able to cast values to integer scaling values.
 #define OPERAND_SCALE_LIST(V) \
   V(Single, 1)                \
   V(Double, 2)                \
   V(Quadruple, 4)
@@ skipping 36 matching lines @@
 #define DECLARE_OPERAND_TYPE(Name, _) k##Name,
   OPERAND_TYPE_LIST(DECLARE_OPERAND_TYPE)
 #undef DECLARE_OPERAND_TYPE
 #define COUNT_OPERAND_TYPES(x, _) +1
   // The COUNT_OPERAND macro will turn this into kLast = -1 +1 +1... which will
   // evaluate to the same value as the last operand.
   kLast = -1 OPERAND_TYPE_LIST(COUNT_OPERAND_TYPES)
 #undef COUNT_OPERAND_TYPES
 };
 
-
 // Enumeration of interpreter bytecodes.
 enum class Bytecode : uint8_t {
 #define DECLARE_BYTECODE(Name, ...) k##Name,
   BYTECODE_LIST(DECLARE_BYTECODE)
 #undef DECLARE_BYTECODE
 #define COUNT_BYTECODE(x, ...) +1
   // The COUNT_BYTECODE macro will turn this into kLast = -1 +1 +1... which will
   // evaluate to the same value as the last real bytecode.
   kLast = -1 BYTECODE_LIST(COUNT_BYTECODE)
 #undef COUNT_BYTECODE
 };
 
-
-// An interpreter Register which is located in the function's Register file
-// in its stack-frame. Register hold parameters, this, and expression values.
-class Register final {
- public:
-  explicit Register(int index = kInvalidIndex) : index_(index) {}
-
-  int index() const { return index_; }
-  bool is_parameter() const { return index() < 0; }
-  bool is_valid() const { return index_ != kInvalidIndex; }
-
-  static Register FromParameterIndex(int index, int parameter_count);
-  int ToParameterIndex(int parameter_count) const;
-
-  // Returns an invalid register.
-  static Register invalid_value() { return Register(); }
-
-  // Returns the register for the function's closure object.
-  static Register function_closure();
-  bool is_function_closure() const;
-
-  // Returns the register which holds the current context object.
-  static Register current_context();
-  bool is_current_context() const;
-
-  // Returns the register for the incoming new target value.
-  static Register new_target();
-  bool is_new_target() const;
-
-  // Returns the register for the bytecode array.
-  static Register bytecode_array();
-  bool is_bytecode_array() const;
-
-  // Returns the register for the saved bytecode offset.
-  static Register bytecode_offset();
-  bool is_bytecode_offset() const;
-
-  // Returns a register that can be used to represent the accumulator
-  // within code in the interpreter, but should never be emitted in
-  // bytecode.
-  static Register virtual_accumulator();
-
-  OperandSize SizeOfOperand() const;
-
-  int32_t ToOperand() const { return kRegisterFileStartOffset - index_; }
-  static Register FromOperand(int32_t operand) {
-    return Register(kRegisterFileStartOffset - operand);
-  }
-
-  static bool AreContiguous(Register reg1, Register reg2,
-                            Register reg3 = Register(),
-                            Register reg4 = Register(),
-                            Register reg5 = Register());
-
-  std::string ToString(int parameter_count);
-
-  bool operator==(const Register& other) const {
-    return index() == other.index();
-  }
-  bool operator!=(const Register& other) const {
-    return index() != other.index();
-  }
-  bool operator<(const Register& other) const {
-    return index() < other.index();
-  }
-  bool operator<=(const Register& other) const {
-    return index() <= other.index();
-  }
-  bool operator>(const Register& other) const {
-    return index() > other.index();
-  }
-  bool operator>=(const Register& other) const {
-    return index() >= other.index();
-  }
-
- private:
-  static const int kInvalidIndex = kMaxInt;
-  static const int kRegisterFileStartOffset =
-      InterpreterFrameConstants::kRegisterFileFromFp / kPointerSize;
-
-  void* operator new(size_t size);
-  void operator delete(void* p);
-
-  int index_;
-};
-
-
-class Bytecodes {
+class Bytecodes final {
  public:
   //  The maximum number of operands a bytecode may have.
   static const int kMaxOperands = 4;
 
   // Returns string representation of |bytecode|.
   static const char* ToString(Bytecode bytecode);
 
   // Returns string representation of |bytecode|.
   static std::string ToString(Bytecode bytecode, OperandScale operand_scale);
 
   // Returns string representation of |accumulator_use|.
   static const char* AccumulatorUseToString(AccumulatorUse accumulator_use);
 
   // Returns string representation of |operand_type|.
   static const char* OperandTypeToString(OperandType operand_type);
 
   // Returns string representation of |operand_scale|.
   static const char* OperandScaleToString(OperandScale operand_scale);
 
   // Returns string representation of |operand_size|.
   static const char* OperandSizeToString(OperandSize operand_size);
 
   // Returns byte value of bytecode.
-  static uint8_t ToByte(Bytecode bytecode) {
-    DCHECK_LE(bytecode, Bytecode::kLast);
-    return static_cast<uint8_t>(bytecode);
-  }
+  static uint8_t ToByte(Bytecode bytecode);
 
   // Returns bytecode for |value|.
   static Bytecode FromByte(uint8_t value);
 
   // Returns the number of operands expected by |bytecode|.
   static int NumberOfOperands(Bytecode bytecode);
 
   // Returns the number of register operands expected by |bytecode|.
   static int NumberOfRegisterOperands(Bytecode bytecode);
 
@@ skipping 140 matching lines @@
   // Returns true if |operand_type| is a maybe register operand
   // (kMaybeReg).
   static bool IsMaybeRegisterOperandType(OperandType operand_type);
 
   // Returns true if |operand_type| is a runtime-id operand (kRuntimeId).
   static bool IsRuntimeIdOperandType(OperandType operand_type);
 
   // Returns true if |operand_type| is unsigned, false if signed.
   static bool IsUnsignedOperandType(OperandType operand_type);
 
-  // Decodes a register operand in a byte array.
-  static Register DecodeRegisterOperand(const uint8_t* operand_start,
-                                        OperandType operand_type,
-                                        OperandScale operand_scale);
-
-  // Decodes a signed operand in a byte array.
-  static int32_t DecodeSignedOperand(const uint8_t* operand_start,
-                                     OperandType operand_type,
-                                     OperandScale operand_scale);
-
-  // Decodes an unsigned operand in a byte array.
-  static uint32_t DecodeUnsignedOperand(const uint8_t* operand_start,
-                                        OperandType operand_type,
-                                        OperandScale operand_scale);
-
-  // Decode a single bytecode and operands to |os|.
-  static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
-                              int number_of_parameters);
-
   // Returns true if a handler is generated for a bytecode at a given
   // operand scale. All bytecodes have handlers at OperandScale::kSingle,
   // but only bytecodes with scalable operands have handlers with larger
   // OperandScale values.
   static bool BytecodeHasHandler(Bytecode bytecode, OperandScale operand_scale);
 
   // Return the operand size required to hold a signed operand.
   static OperandSize SizeForSignedOperand(int value);
 
   // Return the operand size required to hold an unsigned operand.
   static OperandSize SizeForUnsignedOperand(uint32_t value);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);
-};
-
-class CreateObjectLiteralFlags {
- public:
-  class FlagsBits : public BitField8<int, 0, 3> {};
-  class FastClonePropertiesCountBits
-      : public BitField8<int, FlagsBits::kNext, 3> {};
-
-  static uint8_t Encode(bool fast_clone_supported, int properties_count,
-                        int runtime_flags);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(CreateObjectLiteralFlags);
-};
-
-class CreateClosureFlags {
- public:
-  class PretenuredBit : public BitField8<bool, 0, 1> {};
-  class FastNewClosureBit : public BitField8<bool, PretenuredBit::kNext, 1> {};
-
-  static uint8_t Encode(bool pretenure, bool is_function_scope);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(CreateClosureFlags);
 };
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use);
 std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale);
 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_