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authorAllan Sandfeld Jensen <allan.jensen@theqtcompany.com>2015-10-13 13:24:50 +0200
committerAllan Sandfeld Jensen <allan.jensen@theqtcompany.com>2015-10-14 10:57:25 +0000
commitaf3d4809763ef308f08ced947a73b624729ac7ea (patch)
tree4402b911e30383f6c6dace1e8cf3b8e85355db3a /chromium/v8/src/interpreter/bytecodes.h
parent0e8ff63a407fe323e215bb1a2c423c09a4747c8a (diff)
downloadqtwebengine-chromium-af3d4809763ef308f08ced947a73b624729ac7ea.tar.gz
BASELINE: Update Chromium to 47.0.2526.14
Also adding in sources needed for spellchecking. Change-Id: Idd44170fa1616f26315188970a8d5ba7d472b18a Reviewed-by: Michael BrĂ¼ning <michael.bruning@theqtcompany.com>
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+// 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 <iosfwd>
+
+// Clients of this interface shouldn't depend on lots of interpreter internals.
+// Do not include anything from src/interpreter here!
+#include "src/utils.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+// The list of operand types used by bytecodes.
+#define OPERAND_TYPE_LIST(V) \
+ V(None) \
+ V(Count) \
+ V(Imm8) \
+ V(Idx) \
+ V(Reg)
+
+// The list of bytecodes which are interpreted by the interpreter.
+#define BYTECODE_LIST(V) \
+ \
+ /* Loading the accumulator */ \
+ V(LdaZero, OperandType::kNone) \
+ V(LdaSmi8, OperandType::kImm8) \
+ V(LdaConstant, OperandType::kIdx) \
+ V(LdaUndefined, OperandType::kNone) \
+ V(LdaNull, OperandType::kNone) \
+ V(LdaTheHole, OperandType::kNone) \
+ V(LdaTrue, OperandType::kNone) \
+ V(LdaFalse, OperandType::kNone) \
+ \
+ /* Load globals */ \
+ V(LdaGlobal, OperandType::kIdx) \
+ \
+ /* Register-accumulator transfers */ \
+ V(Ldar, OperandType::kReg) \
+ V(Star, OperandType::kReg) \
+ \
+ /* LoadIC operations */ \
+ V(LoadIC, OperandType::kReg, OperandType::kIdx) \
+ V(KeyedLoadIC, OperandType::kReg, OperandType::kIdx) \
+ \
+ /* StoreIC operations */ \
+ V(StoreIC, OperandType::kReg, OperandType::kReg, OperandType::kIdx) \
+ V(KeyedStoreIC, OperandType::kReg, OperandType::kReg, OperandType::kIdx) \
+ \
+ /* Binary Operators */ \
+ V(Add, OperandType::kReg) \
+ V(Sub, OperandType::kReg) \
+ V(Mul, OperandType::kReg) \
+ V(Div, OperandType::kReg) \
+ V(Mod, OperandType::kReg) \
+ \
+ /* Call operations. */ \
+ V(Call, OperandType::kReg, OperandType::kReg, OperandType::kCount) \
+ \
+ /* Test Operators */ \
+ V(TestEqual, OperandType::kReg) \
+ V(TestNotEqual, OperandType::kReg) \
+ V(TestEqualStrict, OperandType::kReg) \
+ V(TestNotEqualStrict, OperandType::kReg) \
+ V(TestLessThan, OperandType::kReg) \
+ V(TestGreaterThan, OperandType::kReg) \
+ V(TestLessThanOrEqual, OperandType::kReg) \
+ V(TestGreaterThanOrEqual, OperandType::kReg) \
+ V(TestInstanceOf, OperandType::kReg) \
+ V(TestIn, OperandType::kReg) \
+ \
+ /* Cast operators */ \
+ V(ToBoolean, OperandType::kNone) \
+ \
+ /* Control Flow */ \
+ V(Jump, OperandType::kImm8) \
+ V(JumpConstant, OperandType::kIdx) \
+ V(JumpIfTrue, OperandType::kImm8) \
+ V(JumpIfTrueConstant, OperandType::kIdx) \
+ V(JumpIfFalse, OperandType::kImm8) \
+ V(JumpIfFalseConstant, OperandType::kIdx) \
+ V(Return, OperandType::kNone)
+
+
+// Enumeration of operand types used by bytecodes.
+enum class OperandType : uint8_t {
+#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 {
+ public:
+ static const int kMaxRegisterIndex = 127;
+ static const int kMinRegisterIndex = -128;
+
+ Register() : index_(kIllegalIndex) {}
+
+ explicit Register(int index) : index_(index) {
+ DCHECK_LE(index_, kMaxRegisterIndex);
+ DCHECK_GE(index_, kMinRegisterIndex);
+ }
+
+ int index() const {
+ DCHECK(index_ != kIllegalIndex);
+ return index_;
+ }
+ bool is_parameter() const { return index() < 0; }
+
+ static Register FromParameterIndex(int index, int parameter_count);
+ int ToParameterIndex(int parameter_count) const;
+ static int MaxParameterIndex();
+
+ static Register FromOperand(uint8_t operand);
+ uint8_t ToOperand() const;
+
+ private:
+ static const int kIllegalIndex = kMaxInt;
+
+ void* operator new(size_t size);
+ void operator delete(void* p);
+
+ int index_;
+};
+
+
+class Bytecodes {
+ public:
+ // Returns string representation of |bytecode|.
+ static const char* ToString(Bytecode bytecode);
+
+ // Returns string representation of |operand_type|.
+ static const char* OperandTypeToString(OperandType operand_type);
+
+ // Returns byte value of 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);
+
+ // Return the i-th operand of |bytecode|.
+ static OperandType GetOperandType(Bytecode bytecode, int i);
+
+ // Returns the size of the bytecode including its operands.
+ static int Size(Bytecode bytecode);
+
+ // The maximum number of operands across all bytecodes.
+ static int MaximumNumberOfOperands();
+
+ // Maximum size of a bytecode and its operands.
+ static int MaximumSize();
+
+ // Decode a single bytecode and operands to |os|.
+ static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
+ int number_of_parameters);
+
+ private:
+ DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);
+};
+
+std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
+std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
+
+} // namespace interpreter
+} // namespace internal
+} // namespace v8
+
+#endif // V8_INTERPRETER_BYTECODES_H_