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bytecodes.h
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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 <cstdint>
#include <iosfwd>
#include <string>
#include <vector>
#include "src/globals.h"
#include "src/interpreter/bytecode-operands.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 {
// The list of bytecodes which are interpreted by the interpreter.
// Format is V(<bytecode>, <accumulator_use>, <operands>).
#define BYTECODE_LIST(V) \
/* Extended width operands */ \
V(Wide, AccumulatorUse::kNone) \
V(ExtraWide, AccumulatorUse::kNone) \
\
/* Debug Breakpoints - one for each possible size of unscaled bytecodes */ \
/* and one for each operand widening prefix bytecode */ \
V(DebugBreakWide, AccumulatorUse::kReadWrite) \
V(DebugBreakExtraWide, AccumulatorUse::kReadWrite) \
V(DebugBreak0, AccumulatorUse::kReadWrite) \
V(DebugBreak1, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(DebugBreak2, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg) \
V(DebugBreak3, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak4, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
V(DebugBreak5, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak6, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
\
/* Loading the accumulator */ \
V(LdaZero, AccumulatorUse::kWrite) \
V(LdaSmi, AccumulatorUse::kWrite, OperandType::kImm) \
V(LdaUndefined, AccumulatorUse::kWrite) \
V(LdaNull, AccumulatorUse::kWrite) \
V(LdaTheHole, AccumulatorUse::kWrite) \
V(LdaTrue, AccumulatorUse::kWrite) \
V(LdaFalse, AccumulatorUse::kWrite) \
V(LdaConstant, AccumulatorUse::kWrite, OperandType::kIdx) \
\
/* Globals */ \
V(LdaGlobal, AccumulatorUse::kWrite, OperandType::kIdx, OperandType::kIdx) \
V(LdaGlobalInsideTypeof, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx) \
V(StaGlobal, AccumulatorUse::kRead, OperandType::kIdx, OperandType::kIdx) \
\
/* Context operations */ \
V(PushContext, AccumulatorUse::kRead, OperandType::kRegOut) \
V(PopContext, AccumulatorUse::kNone, OperandType::kReg) \
V(LdaContextSlot, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kUImm) \
V(LdaImmutableContextSlot, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kUImm) \
V(LdaCurrentContextSlot, AccumulatorUse::kWrite, OperandType::kIdx) \
V(LdaImmutableCurrentContextSlot, AccumulatorUse::kWrite, OperandType::kIdx) \
V(StaContextSlot, AccumulatorUse::kRead, OperandType::kReg, \
OperandType::kIdx, OperandType::kUImm) \
V(StaCurrentContextSlot, AccumulatorUse::kRead, OperandType::kIdx) \
\
/* Load-Store lookup slots */ \
V(LdaLookupSlot, AccumulatorUse::kWrite, OperandType::kIdx) \
V(LdaLookupContextSlot, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx, OperandType::kUImm) \
V(LdaLookupGlobalSlot, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx, OperandType::kUImm) \
V(LdaLookupSlotInsideTypeof, AccumulatorUse::kWrite, OperandType::kIdx) \
V(LdaLookupContextSlotInsideTypeof, AccumulatorUse::kWrite, \
OperandType::kIdx, OperandType::kIdx, OperandType::kUImm) \
V(LdaLookupGlobalSlotInsideTypeof, AccumulatorUse::kWrite, \
OperandType::kIdx, OperandType::kIdx, OperandType::kUImm) \
V(StaLookupSlot, AccumulatorUse::kReadWrite, OperandType::kIdx, \
OperandType::kFlag8) \
\
/* Register-accumulator transfers */ \
V(Ldar, AccumulatorUse::kWrite, OperandType::kReg) \
V(Star, AccumulatorUse::kRead, OperandType::kRegOut) \
\
/* Register-register transfers */ \
V(Mov, AccumulatorUse::kNone, OperandType::kReg, OperandType::kRegOut) \
\
/* Property loads (LoadIC) operations */ \
V(LdaNamedProperty, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kIdx) \
V(LdaKeyedProperty, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
\
/* Operations on module variables */ \
V(LdaModuleVariable, AccumulatorUse::kWrite, OperandType::kImm, \
OperandType::kUImm) \
V(StaModuleVariable, AccumulatorUse::kRead, OperandType::kImm, \
OperandType::kUImm) \
\
/* Propery stores (StoreIC) operations */ \
V(StaNamedProperty, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kIdx) \
V(StaNamedOwnProperty, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kIdx) \
V(StaKeyedProperty, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kIdx) \
V(StaDataPropertyInLiteral, AccumulatorUse::kRead, OperandType::kReg, \
OperandType::kReg, OperandType::kFlag8, OperandType::kIdx) \
V(CollectTypeProfile, AccumulatorUse::kRead, OperandType::kImm) \
\
/* Binary Operators */ \
V(Add, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(Sub, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(Mul, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(Div, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(Mod, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(Exp, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \
V(BitwiseOr, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(BitwiseXor, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(BitwiseAnd, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(ShiftLeft, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(ShiftRight, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(ShiftRightLogical, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
\
/* Binary operators with immediate operands */ \
V(AddSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(SubSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(MulSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(DivSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(ModSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(ExpSmi, AccumulatorUse::kReadWrite, OperandType::kImm, OperandType::kIdx) \
V(BitwiseOrSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
V(BitwiseXorSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
V(BitwiseAndSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
V(ShiftLeftSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
V(ShiftRightSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
V(ShiftRightLogicalSmi, AccumulatorUse::kReadWrite, OperandType::kImm, \
OperandType::kIdx) \
\
/* Unary Operators */ \
V(Inc, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(Dec, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(Negate, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(BitwiseNot, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(ToBooleanLogicalNot, AccumulatorUse::kReadWrite) \
V(LogicalNot, AccumulatorUse::kReadWrite) \
V(TypeOf, AccumulatorUse::kReadWrite) \
V(DeletePropertyStrict, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(DeletePropertySloppy, AccumulatorUse::kReadWrite, OperandType::kReg) \
\
/* GetSuperConstructor operator */ \
V(GetSuperConstructor, AccumulatorUse::kRead, OperandType::kRegOut) \
\
/* Call operations */ \
V(CallAnyReceiver, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
V(CallProperty, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
V(CallProperty0, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kIdx) \
V(CallProperty1, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kIdx) \
V(CallProperty2, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kReg, \
OperandType::kIdx) \
V(CallUndefinedReceiver, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
V(CallUndefinedReceiver0, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kIdx) \
V(CallUndefinedReceiver1, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kIdx) \
V(CallUndefinedReceiver2, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kIdx) \
V(CallWithSpread, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
V(CallRuntime, AccumulatorUse::kWrite, OperandType::kRuntimeId, \
OperandType::kRegList, OperandType::kRegCount) \
V(CallRuntimeForPair, AccumulatorUse::kNone, OperandType::kRuntimeId, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kRegOutPair) \
V(CallJSRuntime, AccumulatorUse::kWrite, OperandType::kNativeContextIndex, \
OperandType::kRegList, OperandType::kRegCount) \
\
/* Intrinsics */ \
V(InvokeIntrinsic, AccumulatorUse::kWrite, OperandType::kIntrinsicId, \
OperandType::kRegList, OperandType::kRegCount) \
\
/* Construct operators */ \
V(Construct, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
V(ConstructWithSpread, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kIdx) \
\
/* Test Operators */ \
V(TestEqual, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestEqualStrict, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestLessThan, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestGreaterThan, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestLessThanOrEqual, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestGreaterThanOrEqual, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestEqualStrictNoFeedback, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(TestInstanceOf, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
V(TestIn, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(TestUndetectable, AccumulatorUse::kReadWrite) \
V(TestNull, AccumulatorUse::kReadWrite) \
V(TestUndefined, AccumulatorUse::kReadWrite) \
V(TestTypeOf, AccumulatorUse::kReadWrite, OperandType::kFlag8) \
\
/* Cast operators */ \
V(ToName, AccumulatorUse::kRead, OperandType::kRegOut) \
V(ToNumber, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(ToNumeric, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(ToObject, AccumulatorUse::kRead, OperandType::kRegOut) \
\
/* Literals */ \
V(CreateRegExpLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx, OperandType::kFlag8) \
V(CreateArrayLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx, OperandType::kFlag8) \
V(CreateEmptyArrayLiteral, AccumulatorUse::kWrite, OperandType::kIdx) \
V(CreateObjectLiteral, AccumulatorUse::kNone, OperandType::kIdx, \
OperandType::kIdx, OperandType::kFlag8, OperandType::kRegOut) \
V(CreateEmptyObjectLiteral, AccumulatorUse::kWrite) \
\
/* Tagged templates */ \
V(GetTemplateObject, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx) \
\
/* Closure allocation */ \
V(CreateClosure, AccumulatorUse::kWrite, OperandType::kIdx, \
OperandType::kIdx, OperandType::kFlag8) \
\
/* Context allocation */ \
V(CreateBlockContext, AccumulatorUse::kReadWrite, OperandType::kIdx) \
V(CreateCatchContext, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx, OperandType::kIdx) \
V(CreateFunctionContext, AccumulatorUse::kWrite, OperandType::kUImm) \
V(CreateEvalContext, AccumulatorUse::kWrite, OperandType::kUImm) \
V(CreateWithContext, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kIdx) \
\
/* Arguments allocation */ \
V(CreateMappedArguments, AccumulatorUse::kWrite) \
V(CreateUnmappedArguments, AccumulatorUse::kWrite) \
V(CreateRestParameter, AccumulatorUse::kWrite) \
\
/* Control Flow -- carefully ordered for efficient checks */ \
/* - [Unconditional jumps] */ \
V(JumpLoop, AccumulatorUse::kNone, OperandType::kUImm, OperandType::kImm) \
/* - [Forward jumps] */ \
V(Jump, AccumulatorUse::kNone, OperandType::kUImm) \
/* - [Start constant jumps] */ \
V(JumpConstant, AccumulatorUse::kNone, OperandType::kIdx) \
/* - [Conditional jumps] */ \
/* - [Conditional constant jumps] */ \
V(JumpIfNullConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfNotNullConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfUndefinedConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfNotUndefinedConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfTrueConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfFalseConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfJSReceiverConstant, AccumulatorUse::kRead, OperandType::kIdx) \
/* - [Start ToBoolean jumps] */ \
V(JumpIfToBooleanTrueConstant, AccumulatorUse::kRead, OperandType::kIdx) \
V(JumpIfToBooleanFalseConstant, AccumulatorUse::kRead, OperandType::kIdx) \
/* - [End constant jumps] */ \
/* - [Conditional immediate jumps] */ \
V(JumpIfToBooleanTrue, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfToBooleanFalse, AccumulatorUse::kRead, OperandType::kUImm) \
/* - [End ToBoolean jumps] */ \
V(JumpIfTrue, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfFalse, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfNull, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfNotNull, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfUndefined, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfNotUndefined, AccumulatorUse::kRead, OperandType::kUImm) \
V(JumpIfJSReceiver, AccumulatorUse::kRead, OperandType::kUImm) \
\
/* Smi-table lookup for switch statements */ \
V(SwitchOnSmiNoFeedback, AccumulatorUse::kRead, OperandType::kIdx, \
OperandType::kUImm, OperandType::kImm) \
\
/* Complex flow control For..in */ \
V(ForInEnumerate, AccumulatorUse::kWrite, OperandType::kReg) \
V(ForInPrepare, AccumulatorUse::kRead, OperandType::kRegOutTriple, \
OperandType::kIdx) \
V(ForInContinue, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kReg) \
V(ForInNext, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg, \
OperandType::kRegPair, OperandType::kIdx) \
V(ForInStep, AccumulatorUse::kWrite, OperandType::kReg) \
\
/* Perform a stack guard check */ \
V(StackCheck, AccumulatorUse::kNone) \
\
/* Update the pending message */ \
V(SetPendingMessage, AccumulatorUse::kReadWrite) \
\
/* Non-local flow control */ \
V(Throw, AccumulatorUse::kRead) \
V(ReThrow, AccumulatorUse::kRead) \
V(Return, AccumulatorUse::kRead) \
V(ThrowReferenceErrorIfHole, AccumulatorUse::kRead, OperandType::kIdx) \
V(ThrowSuperNotCalledIfHole, AccumulatorUse::kRead) \
V(ThrowSuperAlreadyCalledIfNotHole, AccumulatorUse::kRead) \
\
/* Generators */ \
V(SwitchOnGeneratorState, AccumulatorUse::kNone, OperandType::kReg, \
OperandType::kIdx, OperandType::kUImm) \
V(SuspendGenerator, AccumulatorUse::kRead, OperandType::kReg, \
OperandType::kRegList, OperandType::kRegCount, OperandType::kUImm) \
V(ResumeGenerator, AccumulatorUse::kWrite, OperandType::kReg, \
OperandType::kRegOutList, OperandType::kRegCount) \
\
/* Debugger */ \
V(Debugger, AccumulatorUse::kNone) \
\
/* Block Coverage */ \
V(IncBlockCounter, AccumulatorUse::kNone, OperandType::kIdx) \
\
/* Execution Abort (internal error) */ \
V(Abort, AccumulatorUse::kNone, OperandType::kIdx) \
\
/* Illegal bytecode */ \
V(Illegal, AccumulatorUse::kNone)
// List of debug break bytecodes.
#define DEBUG_BREAK_PLAIN_BYTECODE_LIST(V) \
V(DebugBreak0) \
V(DebugBreak1) \
V(DebugBreak2) \
V(DebugBreak3) \
V(DebugBreak4) \
V(DebugBreak5) \
V(DebugBreak6)
#define DEBUG_BREAK_PREFIX_BYTECODE_LIST(V) \
V(DebugBreakWide) \
V(DebugBreakExtraWide)
#define DEBUG_BREAK_BYTECODE_LIST(V) \
DEBUG_BREAK_PLAIN_BYTECODE_LIST(V) \
DEBUG_BREAK_PREFIX_BYTECODE_LIST(V)
// Lists of jump bytecodes.
#define JUMP_UNCONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
V(JumpLoop) \
V(Jump)
#define JUMP_UNCONDITIONAL_CONSTANT_BYTECODE_LIST(V) V(JumpConstant)
#define JUMP_TOBOOLEAN_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
V(JumpIfToBooleanTrue) \
V(JumpIfToBooleanFalse)
#define JUMP_TOBOOLEAN_CONDITIONAL_CONSTANT_BYTECODE_LIST(V) \
V(JumpIfToBooleanTrueConstant) \
V(JumpIfToBooleanFalseConstant)
#define JUMP_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_TOBOOLEAN_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
V(JumpIfTrue) \
V(JumpIfFalse) \
V(JumpIfNull) \
V(JumpIfNotNull) \
V(JumpIfUndefined) \
V(JumpIfNotUndefined) \
V(JumpIfJSReceiver) \
#define JUMP_CONDITIONAL_CONSTANT_BYTECODE_LIST(V) \
JUMP_TOBOOLEAN_CONDITIONAL_CONSTANT_BYTECODE_LIST(V) \
V(JumpIfNullConstant) \
V(JumpIfNotNullConstant) \
V(JumpIfUndefinedConstant) \
V(JumpIfNotUndefinedConstant) \
V(JumpIfTrueConstant) \
V(JumpIfFalseConstant) \
V(JumpIfJSReceiverConstant) \
#define JUMP_CONSTANT_BYTECODE_LIST(V) \
JUMP_UNCONDITIONAL_CONSTANT_BYTECODE_LIST(V) \
JUMP_CONDITIONAL_CONSTANT_BYTECODE_LIST(V)
#define JUMP_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_UNCONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V)
#define JUMP_TO_BOOLEAN_BYTECODE_LIST(V) \
JUMP_TOBOOLEAN_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_TOBOOLEAN_CONDITIONAL_CONSTANT_BYTECODE_LIST(V)
#define JUMP_UNCONDITIONAL_BYTECODE_LIST(V) \
JUMP_UNCONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_UNCONDITIONAL_CONSTANT_BYTECODE_LIST(V)
#define JUMP_CONDITIONAL_BYTECODE_LIST(V) \
JUMP_CONDITIONAL_IMMEDIATE_BYTECODE_LIST(V) \
JUMP_CONDITIONAL_CONSTANT_BYTECODE_LIST(V)
#define JUMP_FORWARD_BYTECODE_LIST(V) \
V(Jump) \
V(JumpConstant) \
JUMP_CONDITIONAL_BYTECODE_LIST(V)
#define JUMP_BYTECODE_LIST(V) \
JUMP_FORWARD_BYTECODE_LIST(V) \
V(JumpLoop)
#define RETURN_BYTECODE_LIST(V) \
V(Return) \
V(SuspendGenerator)
// 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
};
class V8_EXPORT_PRIVATE Bytecodes final : public AllStatic {
public:
// The maximum number of operands a bytecode may have.
static const int kMaxOperands = 5;
// The total number of bytecodes used.
static const int kBytecodeCount = static_cast<int>(Bytecode::kLast) + 1;
// 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 byte value of bytecode.
static uint8_t ToByte(Bytecode bytecode) {
DCHECK_LE(bytecode, Bytecode::kLast);
return static_cast<uint8_t>(bytecode);
}
// Returns bytecode for |value|.
static Bytecode FromByte(uint8_t value) {
Bytecode bytecode = static_cast<Bytecode>(value);
DCHECK_LE(bytecode, Bytecode::kLast);
return bytecode;
}
// Returns the prefix bytecode representing an operand scale to be
// applied to a a bytecode.
static Bytecode OperandScaleToPrefixBytecode(OperandScale operand_scale) {
switch (operand_scale) {
case OperandScale::kQuadruple:
return Bytecode::kExtraWide;
case OperandScale::kDouble:
return Bytecode::kWide;
default:
UNREACHABLE();
}
}
// Returns true if the operand scale requires a prefix bytecode.
static bool OperandScaleRequiresPrefixBytecode(OperandScale operand_scale) {
return operand_scale != OperandScale::kSingle;
}
// Returns the scaling applied to scalable operands if bytecode is
// is a scaling prefix.
static OperandScale PrefixBytecodeToOperandScale(Bytecode bytecode) {
switch (bytecode) {
case Bytecode::kExtraWide:
case Bytecode::kDebugBreakExtraWide:
return OperandScale::kQuadruple;
case Bytecode::kWide:
case Bytecode::kDebugBreakWide:
return OperandScale::kDouble;
default:
UNREACHABLE();
}
}
// Returns how accumulator is used by |bytecode|.
static AccumulatorUse GetAccumulatorUse(Bytecode bytecode) {
DCHECK_LE(bytecode, Bytecode::kLast);
return kAccumulatorUse[static_cast<size_t>(bytecode)];
}
// Returns true if |bytecode| reads the accumulator.
static bool ReadsAccumulator(Bytecode bytecode) {
return BytecodeOperands::ReadsAccumulator(GetAccumulatorUse(bytecode));
}
// Returns true if |bytecode| writes the accumulator.
static bool WritesAccumulator(Bytecode bytecode) {
return BytecodeOperands::WritesAccumulator(GetAccumulatorUse(bytecode));
}
// Return true if |bytecode| is an accumulator load without effects,
// e.g. LdaConstant, LdaTrue, Ldar.
static constexpr bool IsAccumulatorLoadWithoutEffects(Bytecode bytecode) {
return bytecode == Bytecode::kLdar || bytecode == Bytecode::kLdaZero ||
bytecode == Bytecode::kLdaSmi || bytecode == Bytecode::kLdaNull ||
bytecode == Bytecode::kLdaTrue || bytecode == Bytecode::kLdaFalse ||
bytecode == Bytecode::kLdaUndefined ||
bytecode == Bytecode::kLdaTheHole ||
bytecode == Bytecode::kLdaConstant ||
bytecode == Bytecode::kLdaContextSlot ||
bytecode == Bytecode::kLdaCurrentContextSlot ||
bytecode == Bytecode::kLdaImmutableContextSlot ||
bytecode == Bytecode::kLdaImmutableCurrentContextSlot;
}
// Returns true if |bytecode| is a compare operation without external effects
// (e.g., Type cooersion).
static constexpr bool IsCompareWithoutEffects(Bytecode bytecode) {
return bytecode == Bytecode::kTestUndetectable ||
bytecode == Bytecode::kTestNull ||
bytecode == Bytecode::kTestUndefined ||
bytecode == Bytecode::kTestTypeOf;
}
// Return true if |bytecode| is a register load without effects,
// e.g. Mov, Star.
static constexpr bool IsRegisterLoadWithoutEffects(Bytecode bytecode) {
return bytecode == Bytecode::kMov || bytecode == Bytecode::kPopContext ||
bytecode == Bytecode::kPushContext || bytecode == Bytecode::kStar;
}
// Returns true if the bytecode is a conditional jump taking
// an immediate byte operand (OperandType::kImm).
static constexpr bool IsConditionalJumpImmediate(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpIfToBooleanTrue &&
bytecode <= Bytecode::kJumpIfJSReceiver;
}
// Returns true if the bytecode is a conditional jump taking
// a constant pool entry (OperandType::kIdx).
static constexpr bool IsConditionalJumpConstant(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpIfNullConstant &&
bytecode <= Bytecode::kJumpIfToBooleanFalseConstant;
}
// Returns true if the bytecode is a conditional jump taking
// any kind of operand.
static constexpr bool IsConditionalJump(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpIfNullConstant &&
bytecode <= Bytecode::kJumpIfJSReceiver;
}
// Returns true if the bytecode is an unconditional jump.
static constexpr bool IsUnconditionalJump(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpLoop &&
bytecode <= Bytecode::kJumpConstant;
}
// Returns true if the bytecode is a jump or a conditional jump taking
// an immediate byte operand (OperandType::kImm).
static constexpr bool IsJumpImmediate(Bytecode bytecode) {
return bytecode == Bytecode::kJump || bytecode == Bytecode::kJumpLoop ||
IsConditionalJumpImmediate(bytecode);
}
// Returns true if the bytecode is a jump or conditional jump taking a
// constant pool entry (OperandType::kIdx).
static constexpr bool IsJumpConstant(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpConstant &&
bytecode <= Bytecode::kJumpIfToBooleanFalseConstant;
}
// Returns true if the bytecode is a jump that internally coerces the
// accumulator to a boolean.
static constexpr bool IsJumpIfToBoolean(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpIfToBooleanTrueConstant &&
bytecode <= Bytecode::kJumpIfToBooleanFalse;
}
// Returns true if the bytecode is a jump or conditional jump taking
// any kind of operand.
static constexpr bool IsJump(Bytecode bytecode) {
return bytecode >= Bytecode::kJumpLoop &&
bytecode <= Bytecode::kJumpIfJSReceiver;
}
// Returns true if the bytecode is a forward jump or conditional jump taking
// any kind of operand.
static constexpr bool IsForwardJump(Bytecode bytecode) {
return bytecode >= Bytecode::kJump &&
bytecode <= Bytecode::kJumpIfJSReceiver;
}
// Return true if |bytecode| is a jump without effects,
// e.g. any jump excluding those that include type coercion like
// JumpIfTrueToBoolean.
static constexpr bool IsJumpWithoutEffects(Bytecode bytecode) {
return IsJump(bytecode) && !IsJumpIfToBoolean(bytecode);
}
// Returns true if the bytecode is a switch.
static constexpr bool IsSwitch(Bytecode bytecode) {
return bytecode == Bytecode::kSwitchOnSmiNoFeedback ||
bytecode == Bytecode::kSwitchOnGeneratorState;
}
// Returns true if |bytecode| has no effects. These bytecodes only manipulate
// interpreter frame state and will never throw.
static constexpr bool IsWithoutExternalSideEffects(Bytecode bytecode) {
return (IsAccumulatorLoadWithoutEffects(bytecode) ||
IsRegisterLoadWithoutEffects(bytecode) ||
IsCompareWithoutEffects(bytecode) ||
IsJumpWithoutEffects(bytecode) || IsSwitch(bytecode));
}
// Returns true if the bytecode is Ldar or Star.
static constexpr bool IsLdarOrStar(Bytecode bytecode) {
return bytecode == Bytecode::kLdar || bytecode == Bytecode::kStar;
}
// Returns true if the bytecode is a call or a constructor call.
static constexpr bool IsCallOrConstruct(Bytecode bytecode) {
return bytecode == Bytecode::kCallAnyReceiver ||
bytecode == Bytecode::kCallProperty ||
bytecode == Bytecode::kCallProperty0 ||
bytecode == Bytecode::kCallProperty1 ||
bytecode == Bytecode::kCallProperty2 ||
bytecode == Bytecode::kCallUndefinedReceiver ||
bytecode == Bytecode::kCallUndefinedReceiver0 ||
bytecode == Bytecode::kCallUndefinedReceiver1 ||
bytecode == Bytecode::kCallUndefinedReceiver2 ||
bytecode == Bytecode::kConstruct ||
bytecode == Bytecode::kCallWithSpread ||
bytecode == Bytecode::kConstructWithSpread ||
bytecode == Bytecode::kCallJSRuntime;
}
// Returns true if the bytecode is a call to the runtime.
static constexpr bool IsCallRuntime(Bytecode bytecode) {
return bytecode == Bytecode::kCallRuntime ||
bytecode == Bytecode::kCallRuntimeForPair ||
bytecode == Bytecode::kInvokeIntrinsic;
}
// Returns true if the bytecode is a scaling prefix bytecode.
static constexpr bool IsPrefixScalingBytecode(Bytecode bytecode) {
return bytecode == Bytecode::kExtraWide || bytecode == Bytecode::kWide ||
bytecode == Bytecode::kDebugBreakExtraWide ||
bytecode == Bytecode::kDebugBreakWide;
}
// Returns true if the bytecode can be lazily deserialized.
static constexpr bool IsLazy(Bytecode bytecode) {
// Currently, all handlers are deserialized lazily.
return true;
}
// Returns true if the bytecode returns.
static constexpr bool Returns(Bytecode bytecode) {
#define OR_BYTECODE(NAME) || bytecode == Bytecode::k##NAME
return false RETURN_BYTECODE_LIST(OR_BYTECODE);
#undef OR_BYTECODE
}
// Returns the number of values which |bytecode| returns.
static constexpr size_t ReturnCount(Bytecode bytecode) {
return Returns(bytecode) ? 1 : 0;
}
// Returns the number of operands expected by |bytecode|.
static int NumberOfOperands(Bytecode bytecode) {
DCHECK_LE(bytecode, Bytecode::kLast);
return kOperandCount[static_cast<size_t>(bytecode)];
}
// Returns the i-th operand of |bytecode|.
static OperandType GetOperandType(Bytecode bytecode, int i) {
DCHECK_LE(bytecode, Bytecode::kLast);
DCHECK_LT(i, NumberOfOperands(bytecode));
DCHECK_GE(i, 0);
return GetOperandTypes(bytecode)[i];
}
// Returns a pointer to an array of operand types terminated in
// OperandType::kNone.
static const OperandType* GetOperandTypes(Bytecode bytecode) {
DCHECK_LE(bytecode, Bytecode::kLast);
return kOperandTypes[static_cast<size_t>(bytecode)];
}
static bool OperandIsScalableSignedByte(Bytecode bytecode,
int operand_index) {
DCHECK_LE(bytecode, Bytecode::kLast);
return kOperandTypeInfos[static_cast<size_t>(bytecode)][operand_index] ==
OperandTypeInfo::kScalableSignedByte;
}
static bool OperandIsScalableUnsignedByte(Bytecode bytecode,
int operand_index) {
DCHECK_LE(bytecode, Bytecode::kLast);
return kOperandTypeInfos[static_cast<size_t>(bytecode)][operand_index] ==
OperandTypeInfo::kScalableUnsignedByte;
}
static bool OperandIsScalable(Bytecode bytecode, int operand_index) {
return OperandIsScalableSignedByte(bytecode, operand_index) ||
OperandIsScalableUnsignedByte(bytecode, operand_index);
}
// Returns true if the bytecode has wider operand forms.
static bool IsBytecodeWithScalableOperands(Bytecode bytecode);
// Returns the size of the i-th operand of |bytecode|.
static OperandSize GetOperandSize(Bytecode bytecode, int i,
OperandScale operand_scale) {
CHECK_LT(i, NumberOfOperands(bytecode));
return GetOperandSizes(bytecode, operand_scale)[i];
}
// Returns the operand sizes of |bytecode| with scale |operand_scale|.
static const OperandSize* GetOperandSizes(Bytecode bytecode,
OperandScale operand_scale) {
DCHECK_LE(bytecode, Bytecode::kLast);
DCHECK_GE(operand_scale, OperandScale::kSingle);
DCHECK_LE(operand_scale, OperandScale::kLast);
STATIC_ASSERT(static_cast<int>(OperandScale::kQuadruple) == 4 &&
OperandScale::kLast == OperandScale::kQuadruple);
int scale_index = static_cast<int>(operand_scale) >> 1;
return kOperandSizes[scale_index][static_cast<size_t>(bytecode)];
}
// Returns the offset of the i-th operand of |bytecode| relative to the start
// of the bytecode.
static int GetOperandOffset(Bytecode bytecode, int i,
OperandScale operand_scale);
// Returns the size of the bytecode including its operands for the
// given |operand_scale|.
static int Size(Bytecode bytecode, OperandScale operand_scale) {
DCHECK_LE(bytecode, Bytecode::kLast);
STATIC_ASSERT(static_cast<int>(OperandScale::kQuadruple) == 4 &&
OperandScale::kLast == OperandScale::kQuadruple);
int scale_index = static_cast<int>(operand_scale) >> 1;
return kBytecodeSizes[scale_index][static_cast<size_t>(bytecode)];
}
// Returns a debug break bytecode to replace |bytecode|.
static Bytecode GetDebugBreak(Bytecode bytecode);
// Returns the equivalent jump bytecode without the accumulator coercion.
static Bytecode GetJumpWithoutToBoolean(Bytecode bytecode);
// Returns true if there is a call in the most-frequently executed path
// through the bytecode's handler.
static bool MakesCallAlongCriticalPath(Bytecode bytecode);
// Returns the receiver mode of the given call bytecode.
static ConvertReceiverMode GetReceiverMode(Bytecode bytecode) {
DCHECK(IsCallOrConstruct(bytecode) ||
bytecode == Bytecode::kInvokeIntrinsic);
switch (bytecode) {
case Bytecode::kCallProperty:
case Bytecode::kCallProperty0:
case Bytecode::kCallProperty1:
case Bytecode::kCallProperty2:
return ConvertReceiverMode::kNotNullOrUndefined;
case Bytecode::kCallUndefinedReceiver:
case Bytecode::kCallUndefinedReceiver0:
case Bytecode::kCallUndefinedReceiver1:
case Bytecode::kCallUndefinedReceiver2:
case Bytecode::kCallJSRuntime:
return ConvertReceiverMode::kNullOrUndefined;
case Bytecode::kCallAnyReceiver:
case Bytecode::kConstruct:
case Bytecode::kCallWithSpread:
case Bytecode::kConstructWithSpread:
case Bytecode::kInvokeIntrinsic:
return ConvertReceiverMode::kAny;
default:
UNREACHABLE();
}
}
// Returns true if the bytecode is a debug break.
static bool IsDebugBreak(Bytecode bytecode);
// Returns true if |operand_type| is any type of register operand.
static bool IsRegisterOperandType(OperandType operand_type);
// Returns true if |operand_type| represents a register used as an input.
static bool IsRegisterInputOperandType(OperandType operand_type);
// Returns true if |operand_type| represents a register used as an output.
static bool IsRegisterOutputOperandType(OperandType operand_type);
// Returns true if |operand_type| represents a register list operand.
static bool IsRegisterListOperandType(OperandType operand_type);
// Returns true if the handler for |bytecode| should look ahead and inline a
// dispatch to a Star bytecode.
static bool IsStarLookahead(Bytecode bytecode, OperandScale operand_scale);
// Returns the number of registers represented by a register operand. For
// instance, a RegPair represents two registers. Should not be called for
// kRegList which has a variable number of registers based on the following
// kRegCount operand.
static int GetNumberOfRegistersRepresentedBy(OperandType operand_type) {
switch (operand_type) {
case OperandType::kReg:
case OperandType::kRegOut:
return 1;
case OperandType::kRegPair:
case OperandType::kRegOutPair:
return 2;
case OperandType::kRegOutTriple:
return 3;
case OperandType::kRegList:
case OperandType::kRegOutList:
UNREACHABLE();
default:
return 0;
}
UNREACHABLE();
}
// Returns the size of |operand_type| for |operand_scale|.
static OperandSize SizeOfOperand(OperandType operand_type,
OperandScale operand_scale) {
DCHECK_LE(operand_type, OperandType::kLast);
DCHECK_GE(operand_scale, OperandScale::kSingle);
DCHECK_LE(operand_scale, OperandScale::kLast);
STATIC_ASSERT(static_cast<int>(OperandScale::kQuadruple) == 4 &&
OperandScale::kLast == OperandScale::kQuadruple);
int scale_index = static_cast<int>(operand_scale) >> 1;
return kOperandKindSizes[scale_index][static_cast<size_t>(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);
// 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 scale required to hold a signed operand with |value|.
static OperandScale ScaleForSignedOperand(int32_t value) {
if (value >= kMinInt8 && value <= kMaxInt8) {
return OperandScale::kSingle;
} else if (value >= kMinInt16 && value <= kMaxInt16) {
return OperandScale::kDouble;
} else {
return OperandScale::kQuadruple;
}
}
// Return the operand scale required to hold an unsigned operand with |value|.
static OperandScale ScaleForUnsignedOperand(uint32_t value) {
if (value <= kMaxUInt8) {
return OperandScale::kSingle;
} else if (value <= kMaxUInt16) {
return OperandScale::kDouble;
} else {
return OperandScale::kQuadruple;
}
}
// Return the operand size required to hold an unsigned operand with |value|.
static OperandSize SizeForUnsignedOperand(uint32_t value) {
if (value <= kMaxUInt8) {
return OperandSize::kByte;
} else if (value <= kMaxUInt16) {
return OperandSize::kShort;
} else {
return OperandSize::kQuad;
}
}
static Address bytecode_size_table_address() {
return reinterpret_cast<Address>(const_cast<int*>(&kBytecodeSizes[0][0]));
}
private:
static const OperandType* const kOperandTypes[];
static const OperandTypeInfo* const kOperandTypeInfos[];
static const int kOperandCount[];
static const int kNumberOfRegisterOperands[];
static const AccumulatorUse kAccumulatorUse[];
static const bool kIsScalable[];
static const int kBytecodeSizes[3][kBytecodeCount];
static const OperandSize* const kOperandSizes[3][kBytecodeCount];
static OperandSize const
kOperandKindSizes[3][BytecodeOperands::kOperandTypeCount];
};
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const Bytecode& bytecode);
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODES_H_