HeapNumber Class Reference

#include <objects.h>

Inheritance diagram for HeapNumber:

Collaboration diagram for HeapNumber:

Public Member Functions
double	value ()
void	set_value (double value)
Object *	HeapNumberToBoolean ()
void	HeapNumberPrint ()
void	HeapNumberPrint (FILE *out)
void	HeapNumberPrint (StringStream *accumulator)
int	get_exponent ()
int	get_sign ()
Public Member Functions inherited from HeapObject
Map *	map ()
void	set_map (Map *value)
void	set_map_no_write_barrier (Map *value)
MapWord	map_word ()
void	set_map_word (MapWord map_word)
Heap *	GetHeap ()
Isolate *	GetIsolate ()
Address	address ()
void	Iterate (ObjectVisitor *v)
void	IterateBody (InstanceType type, int object_size, ObjectVisitor *v)
int	Size ()
int	SizeFromMap (Map *map)
WriteBarrierMode	GetWriteBarrierMode (const AssertNoAllocation &)
void	HeapObjectShortPrint (StringStream *accumulator)
	STATIC_CHECK (kMapOffset==Internals::kHeapObjectMapOffset)
Public Member Functions inherited from Object
bool	IsObject ()
bool	IsFixedArrayBase ()
bool	IsInstanceOf (FunctionTemplateInfo *type)
bool	IsStruct ()
	INLINE (bool IsSpecObject())
	INLINE (bool IsSpecFunction())
	INLINE (bool IsUndefined())
	INLINE (bool IsNull())
	INLINE (bool IsTheHole())
	INLINE (bool IsTrue())
	INLINE (bool IsFalse())
bool	IsArgumentsMarker ()
bool	NonFailureIsHeapObject ()
bool	IsFiller ()
double	Number ()
bool	IsNaN ()
bool	HasValidElements ()
bool	HasSpecificClassOf (String *name)
MUST_USE_RESULT MaybeObject *	ToObject ()
Object *	ToBoolean ()
MUST_USE_RESULT MaybeObject *	ToObject (Context *native_context)
MUST_USE_RESULT MaybeObject *	ToSmi ()
void	Lookup (String *name, LookupResult *result)
MUST_USE_RESULT MaybeObject *	GetProperty (String *key)
MUST_USE_RESULT MaybeObject *	GetProperty (String *key, PropertyAttributes *attributes)
MUST_USE_RESULT MaybeObject *	GetPropertyWithReceiver (Object *receiver, String *key, PropertyAttributes *attributes)
MUST_USE_RESULT MaybeObject *	GetProperty (Object *receiver, LookupResult *result, String *key, PropertyAttributes *attributes)
MUST_USE_RESULT MaybeObject *	GetPropertyWithDefinedGetter (Object *receiver, JSReceiver *getter)
MUST_USE_RESULT MaybeObject *	GetElement (uint32_t index)
Object *	GetElementNoExceptionThrown (uint32_t index)
MUST_USE_RESULT MaybeObject *	GetElementWithReceiver (Object *receiver, uint32_t index)
Object *	GetPrototype ()
MUST_USE_RESULT MaybeObject *	GetHash (CreationFlag flag)
bool	SameValue (Object *other)
bool	ToArrayIndex (uint32_t *index)
bool	IsStringObjectWithCharacterAt (uint32_t index)
void	VerifyApiCallResultType ()
void	ShortPrint ()
void	ShortPrint (FILE *out)
void	ShortPrint (StringStream *accumulator)

Static Public Member Functions
static HeapNumber *	cast (Object *obj)
Static Public Member Functions inherited from HeapObject
static HeapObject *	FromAddress (Address address)
static Object **	RawField (HeapObject *obj, int offset)
static HeapObject *	cast (Object *obj)
Static Public Member Functions inherited from Object
static Handle< Object >	GetProperty (Handle< Object > object, Handle< Object > receiver, LookupResult *result, Handle< String > key, PropertyAttributes *attributes)
static Handle< Object >	GetElement (Handle< Object > object, uint32_t index)
static Object *	cast (Object *value)

Static Public Attributes
static const int	kValueOffset = HeapObject::kHeaderSize
static const int	kMantissaOffset = kValueOffset
static const int	kExponentOffset = kValueOffset + 4
static const int	kSize = kValueOffset + kDoubleSize
static const uint32_t	kSignMask = 0x80000000u
static const uint32_t	kExponentMask = 0x7ff00000u
static const uint32_t	kMantissaMask = 0xfffffu
static const int	kMantissaBits = 52
static const int	kExponentBits = 11
static const int	kExponentBias = 1023
static const int	kExponentShift = 20
static const int	kMantissaBitsInTopWord = 20
static const int	kNonMantissaBitsInTopWord = 12
Static Public Attributes inherited from HeapObject
static const int	kMapOffset = Object::kHeaderSize
static const int	kHeaderSize = kMapOffset + kPointerSize
Static Public Attributes inherited from Object
static const int	kHeaderSize = 0

Additional Inherited Members
Protected Member Functions inherited from HeapObject
void	IteratePointers (ObjectVisitor *v, int start, int end)
void	IteratePointer (ObjectVisitor *v, int offset)

Detailed Description

Definition at line 1320 of file objects.h.

Member Function Documentation

static HeapNumber* cast ( Object *  obj )

inlinestatic

Referenced by Heap::AllocateHeapNumber(), V8::FillHeapNumberWithRandom(), HeapObject::HeapObjectShortPrint(), Object::IsNaN(), Heap::NumberToString(), JSObject::PrepareElementsForSort(), JSObject::PrepareSlowElementsForSort(), ToBooleanStub::Types::Record(), v8::internal::RUNTIME_FUNCTION(), JSObject::SetFastDoubleElement(), ExternalPixelArray::SetValue(), ExternalUnsignedIntArray::SetValue(), ExternalFloatArray::SetValue(), ExternalDoubleArray::SetValue(), TEST(), TestSeeds(), Object::ToArrayIndex(), Object::ToBoolean(), Object::ToSmi(), and TypeInfo::TypeFromValue().

int get_exponent ( )

inline

Definition at line 1208 of file objects-inl.h.

References HeapNumber::kExponentBias, HeapNumber::kExponentMask, HeapNumber::kExponentOffset, HeapNumber::kExponentShift, and READ_INT_FIELD.

Referenced by v8::internal::RUNTIME_FUNCTION().

int get_sign ( )

inline

Definition at line 1214 of file objects-inl.h.

References HeapNumber::kExponentOffset, HeapNumber::kSignMask, and READ_INT_FIELD.

Referenced by v8::internal::RUNTIME_FUNCTION().

void HeapNumberPrint ( )

inline

Definition at line 1331 of file objects.h.

Referenced by HeapObject::HeapObjectShortPrint().

void HeapNumberPrint

(

FILE *

out

)

Definition at line 1456 of file objects.cc.

References Object::Number(), and v8::internal::PrintF().

void HeapNumberPrint

(

StringStream *

accumulator

)

Definition at line 1461 of file objects.cc.

References StringStream::Add(), Object::Number(), OS::SNPrintF(), and Vector< T >::start().

Object * HeapNumberToBoolean

(

)

Definition at line 1434 of file objects.cc.

References IeeeDoubleBigEndianArchType::bits, IeeeDoubleBigEndianArchType::d, IeeeDoubleBigEndianArchType::exp, HeapObject::GetHeap(), IeeeDoubleBigEndianArchType::man_high, IeeeDoubleBigEndianArchType::man_low, and HeapNumber::value().

Referenced by Object::ToBoolean().

void set_value ( double  value )

inline

Definition at line 1203 of file objects-inl.h.

References HeapNumber::kValueOffset, and WRITE_DOUBLE_FIELD.

Referenced by Heap::AllocateHeapNumber(), V8::FillHeapNumberWithRandom(), JSObject::PrepareElementsForSort(), and JSObject::PrepareSlowElementsForSort().

double value ( )

inline

Definition at line 1198 of file objects-inl.h.

References HeapNumber::kValueOffset, and READ_DOUBLE_FIELD.

Referenced by HeapNumber::HeapNumberToBoolean(), Heap::NumberToString(), JSObject::PrepareSlowElementsForSort(), ToBooleanStub::Types::Record(), v8::internal::RUNTIME_FUNCTION(), JSObject::SetFastDoubleElement(), ExternalPixelArray::SetValue(), ExternalUnsignedIntArray::SetValue(), ExternalFloatArray::SetValue(), ExternalDoubleArray::SetValue(), TEST(), TestSeeds(), Object::ToArrayIndex(), Object::ToSmi(), and TypeInfo::TypeFromValue().

Field Documentation

const int kExponentBias = 1023

static

Definition at line 1356 of file objects.h.

Referenced by HeapNumber::get_exponent().

const int kExponentBits = 11

static

Definition at line 1355 of file objects.h.

const uint32_t kExponentMask = 0x7ff00000u

static

Definition at line 1352 of file objects.h.

Referenced by HeapNumber::get_exponent().

const int kExponentOffset = kValueOffset + 4

static

Definition at line 1348 of file objects.h.

Referenced by HeapNumber::get_exponent(), and HeapNumber::get_sign().

const int kExponentShift = 20

static

Definition at line 1357 of file objects.h.

Referenced by HeapNumber::get_exponent().

const int kMantissaBits = 52

static

Definition at line 1354 of file objects.h.

const int kMantissaBitsInTopWord = 20

static

Definition at line 1358 of file objects.h.

const uint32_t kMantissaMask = 0xfffffu

static

Definition at line 1353 of file objects.h.

const int kMantissaOffset = kValueOffset

static

Definition at line 1347 of file objects.h.

const int kNonMantissaBitsInTopWord = 12

static

Definition at line 1359 of file objects.h.

const uint32_t kSignMask = 0x80000000u

static

Definition at line 1351 of file objects.h.

Referenced by HeapNumber::get_sign().

const int kSize = kValueOffset + kDoubleSize

static

Definition at line 1350 of file objects.h.

Referenced by Heap::AllocateHeapNumber(), and TEST().

const int kValueOffset = HeapObject::kHeaderSize

static

Definition at line 1342 of file objects.h.

Referenced by HeapNumber::set_value(), and HeapNumber::value().

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The documentation for this class was generated from the following files:

• src/objects.h
• src/objects-inl.h
• src/objects.cc