Upgrade to V8 3.3
Merge V8 at 3.3.10.39
Simple merge required updates to makefiles only.
Bug: 5688872
Change-Id: I14703f418235f5ce6013b9b3e2e502407a9f6dfd
diff --git a/src/mips/code-stubs-mips.h b/src/mips/code-stubs-mips.h
index 675730a..356aa97 100644
--- a/src/mips/code-stubs-mips.h
+++ b/src/mips/code-stubs-mips.h
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
@@ -39,13 +39,22 @@
// TranscendentalCache runtime function.
class TranscendentalCacheStub: public CodeStub {
public:
- explicit TranscendentalCacheStub(TranscendentalCache::Type type)
- : type_(type) {}
+ enum ArgumentType {
+ TAGGED = 0 << TranscendentalCache::kTranscendentalTypeBits,
+ UNTAGGED = 1 << TranscendentalCache::kTranscendentalTypeBits
+ };
+
+ TranscendentalCacheStub(TranscendentalCache::Type type,
+ ArgumentType argument_type)
+ : type_(type), argument_type_(argument_type) { }
void Generate(MacroAssembler* masm);
private:
TranscendentalCache::Type type_;
+ ArgumentType argument_type_;
+ void GenerateCallCFunction(MacroAssembler* masm, Register scratch);
+
Major MajorKey() { return TranscendentalCache; }
- int MinorKey() { return type_; }
+ int MinorKey() { return type_ | argument_type_; }
Runtime::FunctionId RuntimeFunction();
};
@@ -63,176 +72,108 @@
};
-class GenericBinaryOpStub : public CodeStub {
+class UnaryOpStub: public CodeStub {
public:
- static const int kUnknownIntValue = -1;
-
- GenericBinaryOpStub(Token::Value op,
- OverwriteMode mode,
- Register lhs,
- Register rhs,
- int constant_rhs = kUnknownIntValue)
+ UnaryOpStub(Token::Value op, UnaryOverwriteMode mode)
: op_(op),
mode_(mode),
- lhs_(lhs),
- rhs_(rhs),
- constant_rhs_(constant_rhs),
- specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op, constant_rhs)),
- runtime_operands_type_(BinaryOpIC::UNINIT_OR_SMI),
- name_(NULL) { }
+ operand_type_(UnaryOpIC::UNINITIALIZED),
+ name_(NULL) {
+ }
- GenericBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info)
+ UnaryOpStub(
+ int key,
+ UnaryOpIC::TypeInfo operand_type)
: op_(OpBits::decode(key)),
mode_(ModeBits::decode(key)),
- lhs_(LhsRegister(RegisterBits::decode(key))),
- rhs_(RhsRegister(RegisterBits::decode(key))),
- constant_rhs_(KnownBitsForMinorKey(KnownIntBits::decode(key))),
- specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op_, constant_rhs_)),
- runtime_operands_type_(type_info),
- name_(NULL) { }
+ operand_type_(operand_type),
+ name_(NULL) {
+ }
private:
Token::Value op_;
- OverwriteMode mode_;
- Register lhs_;
- Register rhs_;
- int constant_rhs_;
- bool specialized_on_rhs_;
- BinaryOpIC::TypeInfo runtime_operands_type_;
+ UnaryOverwriteMode mode_;
+
+ // Operand type information determined at runtime.
+ UnaryOpIC::TypeInfo operand_type_;
+
char* name_;
- static const int kMaxKnownRhs = 0x40000000;
- static const int kKnownRhsKeyBits = 6;
-
- // Minor key encoding in 16 bits.
- class ModeBits: public BitField<OverwriteMode, 0, 2> {};
- class OpBits: public BitField<Token::Value, 2, 6> {};
- class TypeInfoBits: public BitField<int, 8, 3> {};
- class RegisterBits: public BitField<bool, 11, 1> {};
- class KnownIntBits: public BitField<int, 12, kKnownRhsKeyBits> {};
-
- Major MajorKey() { return GenericBinaryOp; }
- int MinorKey() {
- ASSERT((lhs_.is(a0) && rhs_.is(a1)) ||
- (lhs_.is(a1) && rhs_.is(a0)));
- // Encode the parameters in a unique 16 bit value.
- return OpBits::encode(op_)
- | ModeBits::encode(mode_)
- | KnownIntBits::encode(MinorKeyForKnownInt())
- | TypeInfoBits::encode(runtime_operands_type_)
- | RegisterBits::encode(lhs_.is(a0));
- }
-
- void Generate(MacroAssembler* masm);
- void HandleNonSmiBitwiseOp(MacroAssembler* masm,
- Register lhs,
- Register rhs);
- void HandleBinaryOpSlowCases(MacroAssembler* masm,
- Label* not_smi,
- Register lhs,
- Register rhs,
- const Builtins::JavaScript& builtin);
- void GenerateTypeTransition(MacroAssembler* masm);
-
- static bool RhsIsOneWeWantToOptimizeFor(Token::Value op, int constant_rhs) {
- if (constant_rhs == kUnknownIntValue) return false;
- if (op == Token::DIV) return constant_rhs >= 2 && constant_rhs <= 3;
- if (op == Token::MOD) {
- if (constant_rhs <= 1) return false;
- if (constant_rhs <= 10) return true;
- if (constant_rhs <= kMaxKnownRhs && IsPowerOf2(constant_rhs)) return true;
- return false;
- }
- return false;
- }
-
- int MinorKeyForKnownInt() {
- if (!specialized_on_rhs_) return 0;
- if (constant_rhs_ <= 10) return constant_rhs_ + 1;
- ASSERT(IsPowerOf2(constant_rhs_));
- int key = 12;
- int d = constant_rhs_;
- while ((d & 1) == 0) {
- key++;
- d >>= 1;
- }
- ASSERT(key >= 0 && key < (1 << kKnownRhsKeyBits));
- return key;
- }
-
- int KnownBitsForMinorKey(int key) {
- if (!key) return 0;
- if (key <= 11) return key - 1;
- int d = 1;
- while (key != 12) {
- key--;
- d <<= 1;
- }
- return d;
- }
-
- Register LhsRegister(bool lhs_is_a0) {
- return lhs_is_a0 ? a0 : a1;
- }
-
- Register RhsRegister(bool lhs_is_a0) {
- return lhs_is_a0 ? a1 : a0;
- }
-
- bool HasSmiSmiFastPath() {
- return op_ != Token::DIV;
- }
-
- bool ShouldGenerateSmiCode() {
- return ((op_ != Token::DIV && op_ != Token::MOD) || specialized_on_rhs_) &&
- runtime_operands_type_ != BinaryOpIC::HEAP_NUMBERS &&
- runtime_operands_type_ != BinaryOpIC::STRINGS;
- }
-
- bool ShouldGenerateFPCode() {
- return runtime_operands_type_ != BinaryOpIC::STRINGS;
- }
-
- virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
-
- virtual InlineCacheState GetICState() {
- return BinaryOpIC::ToState(runtime_operands_type_);
- }
-
const char* GetName();
- virtual void FinishCode(Code* code) {
- code->set_binary_op_type(runtime_operands_type_);
- }
-
#ifdef DEBUG
void Print() {
- if (!specialized_on_rhs_) {
- PrintF("GenericBinaryOpStub (%s)\n", Token::String(op_));
- } else {
- PrintF("GenericBinaryOpStub (%s by %d)\n",
- Token::String(op_),
- constant_rhs_);
- }
+ PrintF("UnaryOpStub %d (op %s), "
+ "(mode %d, runtime_type_info %s)\n",
+ MinorKey(),
+ Token::String(op_),
+ static_cast<int>(mode_),
+ UnaryOpIC::GetName(operand_type_));
}
#endif
-};
-class TypeRecordingBinaryOpStub: public CodeStub {
- public:
- TypeRecordingBinaryOpStub(Token::Value op, OverwriteMode mode)
- : op_(op),
- mode_(mode),
- operands_type_(TRBinaryOpIC::UNINITIALIZED),
- result_type_(TRBinaryOpIC::UNINITIALIZED),
- name_(NULL) {
- UNIMPLEMENTED_MIPS();
+ class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
+ class OpBits: public BitField<Token::Value, 1, 7> {};
+ class OperandTypeInfoBits: public BitField<UnaryOpIC::TypeInfo, 8, 3> {};
+
+ Major MajorKey() { return UnaryOp; }
+ int MinorKey() {
+ return ModeBits::encode(mode_)
+ | OpBits::encode(op_)
+ | OperandTypeInfoBits::encode(operand_type_);
}
- TypeRecordingBinaryOpStub(
+ // Note: A lot of the helper functions below will vanish when we use virtual
+ // function instead of switch more often.
+ void Generate(MacroAssembler* masm);
+
+ void GenerateTypeTransition(MacroAssembler* masm);
+
+ void GenerateSmiStub(MacroAssembler* masm);
+ void GenerateSmiStubSub(MacroAssembler* masm);
+ void GenerateSmiStubBitNot(MacroAssembler* masm);
+ void GenerateSmiCodeSub(MacroAssembler* masm, Label* non_smi, Label* slow);
+ void GenerateSmiCodeBitNot(MacroAssembler* masm, Label* slow);
+
+ void GenerateHeapNumberStub(MacroAssembler* masm);
+ void GenerateHeapNumberStubSub(MacroAssembler* masm);
+ void GenerateHeapNumberStubBitNot(MacroAssembler* masm);
+ void GenerateHeapNumberCodeSub(MacroAssembler* masm, Label* slow);
+ void GenerateHeapNumberCodeBitNot(MacroAssembler* masm, Label* slow);
+
+ void GenerateGenericStub(MacroAssembler* masm);
+ void GenerateGenericStubSub(MacroAssembler* masm);
+ void GenerateGenericStubBitNot(MacroAssembler* masm);
+ void GenerateGenericCodeFallback(MacroAssembler* masm);
+
+ virtual int GetCodeKind() { return Code::UNARY_OP_IC; }
+
+ virtual InlineCacheState GetICState() {
+ return UnaryOpIC::ToState(operand_type_);
+ }
+
+ virtual void FinishCode(Code* code) {
+ code->set_unary_op_type(operand_type_);
+ }
+};
+
+
+class BinaryOpStub: public CodeStub {
+ public:
+ BinaryOpStub(Token::Value op, OverwriteMode mode)
+ : op_(op),
+ mode_(mode),
+ operands_type_(BinaryOpIC::UNINITIALIZED),
+ result_type_(BinaryOpIC::UNINITIALIZED),
+ name_(NULL) {
+ use_fpu_ = CpuFeatures::IsSupported(FPU);
+ ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
+ }
+
+ BinaryOpStub(
int key,
- TRBinaryOpIC::TypeInfo operands_type,
- TRBinaryOpIC::TypeInfo result_type = TRBinaryOpIC::UNINITIALIZED)
+ BinaryOpIC::TypeInfo operands_type,
+ BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
: op_(OpBits::decode(key)),
mode_(ModeBits::decode(key)),
use_fpu_(FPUBits::decode(key)),
@@ -251,8 +192,8 @@
bool use_fpu_;
// Operand type information determined at runtime.
- TRBinaryOpIC::TypeInfo operands_type_;
- TRBinaryOpIC::TypeInfo result_type_;
+ BinaryOpIC::TypeInfo operands_type_;
+ BinaryOpIC::TypeInfo result_type_;
char* name_;
@@ -260,12 +201,12 @@
#ifdef DEBUG
void Print() {
- PrintF("TypeRecordingBinaryOpStub %d (op %s), "
+ PrintF("BinaryOpStub %d (op %s), "
"(mode %d, runtime_type_info %s)\n",
MinorKey(),
Token::String(op_),
static_cast<int>(mode_),
- TRBinaryOpIC::GetName(operands_type_));
+ BinaryOpIC::GetName(operands_type_));
}
#endif
@@ -273,10 +214,10 @@
class ModeBits: public BitField<OverwriteMode, 0, 2> {};
class OpBits: public BitField<Token::Value, 2, 7> {};
class FPUBits: public BitField<bool, 9, 1> {};
- class OperandTypeInfoBits: public BitField<TRBinaryOpIC::TypeInfo, 10, 3> {};
- class ResultTypeInfoBits: public BitField<TRBinaryOpIC::TypeInfo, 13, 3> {};
+ class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {};
+ class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {};
- Major MajorKey() { return TypeRecordingBinaryOp; }
+ Major MajorKey() { return BinaryOp; }
int MinorKey() {
return OpBits::encode(op_)
| ModeBits::encode(mode_)
@@ -293,6 +234,7 @@
Label* not_numbers,
Label* gc_required);
void GenerateSmiCode(MacroAssembler* masm,
+ Label* use_runtime,
Label* gc_required,
SmiCodeGenerateHeapNumberResults heapnumber_results);
void GenerateLoadArguments(MacroAssembler* masm);
@@ -301,7 +243,9 @@
void GenerateSmiStub(MacroAssembler* masm);
void GenerateInt32Stub(MacroAssembler* masm);
void GenerateHeapNumberStub(MacroAssembler* masm);
+ void GenerateOddballStub(MacroAssembler* masm);
void GenerateStringStub(MacroAssembler* masm);
+ void GenerateBothStringStub(MacroAssembler* masm);
void GenerateGenericStub(MacroAssembler* masm);
void GenerateAddStrings(MacroAssembler* masm);
void GenerateCallRuntime(MacroAssembler* masm);
@@ -316,15 +260,15 @@
void GenerateTypeTransition(MacroAssembler* masm);
void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
- virtual int GetCodeKind() { return Code::TYPE_RECORDING_BINARY_OP_IC; }
+ virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
virtual InlineCacheState GetICState() {
- return TRBinaryOpIC::ToState(operands_type_);
+ return BinaryOpIC::ToState(operands_type_);
}
virtual void FinishCode(Code* code) {
- code->set_type_recording_binary_op_type(operands_type_);
- code->set_type_recording_binary_op_result_type(result_type_);
+ code->set_binary_op_type(operands_type_);
+ code->set_binary_op_result_type(result_type_);
}
friend class CodeGenerator;
@@ -334,24 +278,36 @@
// Flag that indicates how to generate code for the stub StringAddStub.
enum StringAddFlags {
NO_STRING_ADD_FLAGS = 0,
- NO_STRING_CHECK_IN_STUB = 1 << 0 // Omit string check in stub.
+ // Omit left string check in stub (left is definitely a string).
+ NO_STRING_CHECK_LEFT_IN_STUB = 1 << 0,
+ // Omit right string check in stub (right is definitely a string).
+ NO_STRING_CHECK_RIGHT_IN_STUB = 1 << 1,
+ // Omit both string checks in stub.
+ NO_STRING_CHECK_IN_STUB =
+ NO_STRING_CHECK_LEFT_IN_STUB | NO_STRING_CHECK_RIGHT_IN_STUB
};
class StringAddStub: public CodeStub {
public:
- explicit StringAddStub(StringAddFlags flags) {
- string_check_ = ((flags & NO_STRING_CHECK_IN_STUB) == 0);
- }
+ explicit StringAddStub(StringAddFlags flags) : flags_(flags) {}
private:
Major MajorKey() { return StringAdd; }
- int MinorKey() { return string_check_ ? 0 : 1; }
+ int MinorKey() { return flags_; }
void Generate(MacroAssembler* masm);
- // Should the stub check whether arguments are strings?
- bool string_check_;
+ void GenerateConvertArgument(MacroAssembler* masm,
+ int stack_offset,
+ Register arg,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3,
+ Register scratch4,
+ Label* slow);
+
+ const StringAddFlags flags_;
};
@@ -372,7 +328,6 @@
StringCompareStub() { }
// Compare two flat ASCII strings and returns result in v0.
- // Does not use the stack.
static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
Register left,
Register right,
@@ -381,11 +336,28 @@
Register scratch3,
Register scratch4);
- private:
- Major MajorKey() { return StringCompare; }
- int MinorKey() { return 0; }
+ // Compares two flat ASCII strings for equality and returns result
+ // in v0.
+ static void GenerateFlatAsciiStringEquals(MacroAssembler* masm,
+ Register left,
+ Register right,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3);
- void Generate(MacroAssembler* masm);
+ private:
+ virtual Major MajorKey() { return StringCompare; }
+ virtual int MinorKey() { return 0; }
+ virtual void Generate(MacroAssembler* masm);
+
+ static void GenerateAsciiCharsCompareLoop(MacroAssembler* masm,
+ Register left,
+ Register right,
+ Register length,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3,
+ Label* chars_not_equal);
};
@@ -484,26 +456,225 @@
const char* GetName() { return "RegExpCEntryStub"; }
};
+// Trampoline stub to call into native code. To call safely into native code
+// in the presence of compacting GC (which can move code objects) we need to
+// keep the code which called into native pinned in the memory. Currently the
+// simplest approach is to generate such stub early enough so it can never be
+// moved by GC
+class DirectCEntryStub: public CodeStub {
+ public:
+ DirectCEntryStub() {}
+ void Generate(MacroAssembler* masm);
+ void GenerateCall(MacroAssembler* masm,
+ ExternalReference function);
+ void GenerateCall(MacroAssembler* masm, Register target);
-// Generate code the to load an element from a pixel array. The receiver is
-// assumed to not be a smi and to have elements, the caller must guarantee this
-// precondition. If the receiver does not have elements that are pixel arrays,
-// the generated code jumps to not_pixel_array. If key is not a smi, then the
-// generated code branches to key_not_smi. Callers can specify NULL for
-// key_not_smi to signal that a smi check has already been performed on key so
-// that the smi check is not generated . If key is not a valid index within the
-// bounds of the pixel array, the generated code jumps to out_of_range.
-void GenerateFastPixelArrayLoad(MacroAssembler* masm,
- Register receiver,
- Register key,
- Register elements_map,
- Register elements,
+ private:
+ Major MajorKey() { return DirectCEntry; }
+ int MinorKey() { return 0; }
+
+ bool NeedsImmovableCode() { return true; }
+
+ const char* GetName() { return "DirectCEntryStub"; }
+};
+
+class FloatingPointHelper : public AllStatic {
+ public:
+
+ enum Destination {
+ kFPURegisters,
+ kCoreRegisters
+ };
+
+
+ // Loads smis from a0 and a1 (right and left in binary operations) into
+ // floating point registers. Depending on the destination the values ends up
+ // either f14 and f12 or in a2/a3 and a0/a1 respectively. If the destination
+ // is floating point registers FPU must be supported. If core registers are
+ // requested when FPU is supported f12 and f14 will be scratched.
+ static void LoadSmis(MacroAssembler* masm,
+ Destination destination,
+ Register scratch1,
+ Register scratch2);
+
+ // Loads objects from a0 and a1 (right and left in binary operations) into
+ // floating point registers. Depending on the destination the values ends up
+ // either f14 and f12 or in a2/a3 and a0/a1 respectively. If the destination
+ // is floating point registers FPU must be supported. If core registers are
+ // requested when FPU is supported f12 and f14 will still be scratched. If
+ // either a0 or a1 is not a number (not smi and not heap number object) the
+ // not_number label is jumped to with a0 and a1 intact.
+ static void LoadOperands(MacroAssembler* masm,
+ FloatingPointHelper::Destination destination,
+ Register heap_number_map,
+ Register scratch1,
+ Register scratch2,
+ Label* not_number);
+
+ // Convert the smi or heap number in object to an int32 using the rules
+ // for ToInt32 as described in ECMAScript 9.5.: the value is truncated
+ // and brought into the range -2^31 .. +2^31 - 1.
+ static void ConvertNumberToInt32(MacroAssembler* masm,
+ Register object,
+ Register dst,
+ Register heap_number_map,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3,
+ FPURegister double_scratch,
+ Label* not_int32);
+
+ // Converts the integer (untagged smi) in |int_scratch| to a double, storing
+ // the result either in |double_dst| or |dst2:dst1|, depending on
+ // |destination|.
+ // Warning: The value in |int_scratch| will be changed in the process!
+ static void ConvertIntToDouble(MacroAssembler* masm,
+ Register int_scratch,
+ Destination destination,
+ FPURegister double_dst,
+ Register dst1,
+ Register dst2,
+ Register scratch2,
+ FPURegister single_scratch);
+
+ // Load the number from object into double_dst in the double format.
+ // Control will jump to not_int32 if the value cannot be exactly represented
+ // by a 32-bit integer.
+ // Floating point value in the 32-bit integer range that are not exact integer
+ // won't be loaded.
+ static void LoadNumberAsInt32Double(MacroAssembler* masm,
+ Register object,
+ Destination destination,
+ FPURegister double_dst,
+ Register dst1,
+ Register dst2,
+ Register heap_number_map,
+ Register scratch1,
+ Register scratch2,
+ FPURegister single_scratch,
+ Label* not_int32);
+
+ // Loads the number from object into dst as a 32-bit integer.
+ // Control will jump to not_int32 if the object cannot be exactly represented
+ // by a 32-bit integer.
+ // Floating point value in the 32-bit integer range that are not exact integer
+ // won't be converted.
+ // scratch3 is not used when FPU is supported.
+ static void LoadNumberAsInt32(MacroAssembler* masm,
+ Register object,
+ Register dst,
+ Register heap_number_map,
Register scratch1,
Register scratch2,
- Register result,
- Label* not_pixel_array,
- Label* key_not_smi,
- Label* out_of_range);
+ Register scratch3,
+ FPURegister double_scratch,
+ Label* not_int32);
+
+ // Generate non FPU code to check if a double can be exactly represented by a
+ // 32-bit integer. This does not check for 0 or -0, which need
+ // to be checked for separately.
+ // Control jumps to not_int32 if the value is not a 32-bit integer, and falls
+ // through otherwise.
+ // src1 and src2 will be cloberred.
+ //
+ // Expected input:
+ // - src1: higher (exponent) part of the double value.
+ // - src2: lower (mantissa) part of the double value.
+ // Output status:
+ // - dst: 32 higher bits of the mantissa. (mantissa[51:20])
+ // - src2: contains 1.
+ // - other registers are clobbered.
+ static void DoubleIs32BitInteger(MacroAssembler* masm,
+ Register src1,
+ Register src2,
+ Register dst,
+ Register scratch,
+ Label* not_int32);
+
+ // Generates code to call a C function to do a double operation using core
+ // registers. (Used when FPU is not supported.)
+ // This code never falls through, but returns with a heap number containing
+ // the result in v0.
+ // Register heapnumber_result must be a heap number in which the
+ // result of the operation will be stored.
+ // Requires the following layout on entry:
+ // a0: Left value (least significant part of mantissa).
+ // a1: Left value (sign, exponent, top of mantissa).
+ // a2: Right value (least significant part of mantissa).
+ // a3: Right value (sign, exponent, top of mantissa).
+ static void CallCCodeForDoubleOperation(MacroAssembler* masm,
+ Token::Value op,
+ Register heap_number_result,
+ Register scratch);
+
+ private:
+ static void LoadNumber(MacroAssembler* masm,
+ FloatingPointHelper::Destination destination,
+ Register object,
+ FPURegister dst,
+ Register dst1,
+ Register dst2,
+ Register heap_number_map,
+ Register scratch1,
+ Register scratch2,
+ Label* not_number);
+};
+
+
+class StringDictionaryLookupStub: public CodeStub {
+ public:
+ enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP };
+
+ explicit StringDictionaryLookupStub(LookupMode mode) : mode_(mode) { }
+
+ void Generate(MacroAssembler* masm);
+
+ MUST_USE_RESULT static MaybeObject* GenerateNegativeLookup(
+ MacroAssembler* masm,
+ Label* miss,
+ Label* done,
+ Register receiver,
+ Register properties,
+ String* name,
+ Register scratch0);
+
+ static void GeneratePositiveLookup(MacroAssembler* masm,
+ Label* miss,
+ Label* done,
+ Register elements,
+ Register name,
+ Register r0,
+ Register r1);
+
+ private:
+ static const int kInlinedProbes = 4;
+ static const int kTotalProbes = 20;
+
+ static const int kCapacityOffset =
+ StringDictionary::kHeaderSize +
+ StringDictionary::kCapacityIndex * kPointerSize;
+
+ static const int kElementsStartOffset =
+ StringDictionary::kHeaderSize +
+ StringDictionary::kElementsStartIndex * kPointerSize;
+
+
+#ifdef DEBUG
+ void Print() {
+ PrintF("StringDictionaryLookupStub\n");
+ }
+#endif
+
+ Major MajorKey() { return StringDictionaryNegativeLookup; }
+
+ int MinorKey() {
+ return LookupModeBits::encode(mode_);
+ }
+
+ class LookupModeBits: public BitField<LookupMode, 0, 1> {};
+
+ LookupMode mode_;
+};
} } // namespace v8::internal