llvm::APFloat Class Reference

#include <APFloat.h>

Collaboration diagram for llvm::APFloat:

[legend]

List of all members.

Public Types
enum	cmpResult { cmpLessThan, cmpEqual, cmpGreaterThan, cmpUnordered }
enum	roundingMode {   rmNearestTiesToEven, rmTowardPositive, rmTowardNegative, rmTowardZero,   rmNearestTiesToAway }
enum	opStatus {   opOK = 0x00, opInvalidOp = 0x01, opDivByZero = 0x02, opOverflow = 0x04,   opUnderflow = 0x08, opInexact = 0x10 }
enum	fltCategory { fcInfinity, fcNaN, fcNormal, fcZero }
Public Member Functions
	APFloat (const fltSemantics &, const char *)
	APFloat (const fltSemantics &, integerPart)
	APFloat (const fltSemantics &, fltCategory, bool negative)
	APFloat (double d)
	APFloat (float f)
	APFloat (const APInt &, bool isIEEE=false)
	APFloat (const APFloat &)
	~APFloat ()
void	Profile (FoldingSetNodeID &NID) const
void	Emit (Serializer &S) const
	Used by the Bitcode serializer to emit APInts to Bitcode.
opStatus	add (const APFloat &, roundingMode)
opStatus	subtract (const APFloat &, roundingMode)
opStatus	multiply (const APFloat &, roundingMode)
opStatus	divide (const APFloat &, roundingMode)
opStatus	mod (const APFloat &, roundingMode)
opStatus	fusedMultiplyAdd (const APFloat &, const APFloat &, roundingMode)
void	changeSign ()
void	clearSign ()
void	copySign (const APFloat &)
opStatus	convert (const fltSemantics &, roundingMode, bool *)
opStatus	convertToInteger (integerPart *, unsigned int, bool, roundingMode, bool *) const
opStatus	convertFromAPInt (const APInt &, bool, roundingMode)
opStatus	convertFromSignExtendedInteger (const integerPart *, unsigned int, bool, roundingMode)
opStatus	convertFromZeroExtendedInteger (const integerPart *, unsigned int, bool, roundingMode)
opStatus	convertFromString (const char *, roundingMode)
APInt	bitcastToAPInt () const
double	convertToDouble () const
float	convertToFloat () const
cmpResult	compare (const APFloat &) const
bool	bitwiseIsEqual (const APFloat &) const
unsigned int	convertToHexString (char *dst, unsigned int hexDigits, bool upperCase, roundingMode) const
fltCategory	getCategory () const
const fltSemantics &	getSemantics () const
bool	isZero () const
bool	isNonZero () const
bool	isNaN () const
bool	isInfinity () const
bool	isNegative () const
bool	isPosZero () const
bool	isNegZero () const
APFloat &	operator= (const APFloat &)
uint32_t	getHashValue () const
Static Public Member Functions
static unsigned int	semanticsPrecision (const fltSemantics &)
static APFloat	getZero (const fltSemantics &Sem, bool Negative=false)
static APFloat	getInf (const fltSemantics &Sem, bool Negative=false)
static APFloat	getNaN (const fltSemantics &Sem, bool Negative=false)
static APFloat	ReadVal (Deserializer &D)
	Used by the Bitcode deserializer to deserialize APInts.
Static Public Attributes
static const fltSemantics	IEEEsingle = { 127, -126, 24, true }
static const fltSemantics	IEEEdouble = { 1023, -1022, 53, true }
static const fltSemantics	IEEEquad = { 16383, -16382, 113, true }
static const fltSemantics	PPCDoubleDouble = { 1023, -1022, 106, false }
static const fltSemantics	x87DoubleExtended = { 16383, -16382, 64, true }
static const fltSemantics	Bogus = { 0, 0, 0, true }
Classes
union	Significand

---

Detailed Description

Definition at line 123 of file APFloat.h.

---

Member Enumeration Documentation

enum llvm::APFloat::cmpResult

Enumerator:

cmpLessThan
cmpEqual
cmpGreaterThan
cmpUnordered

Definition at line 139 of file APFloat.h.

enum llvm::APFloat::roundingMode

Enumerator:

rmNearestTiesToEven
rmTowardPositive
rmTowardNegative
rmTowardZero
rmNearestTiesToAway

Definition at line 147 of file APFloat.h.

enum llvm::APFloat::opStatus

Enumerator:

opOK
opInvalidOp
opDivByZero
opOverflow
opUnderflow
opInexact

Definition at line 157 of file APFloat.h.

enum llvm::APFloat::fltCategory

Enumerator:

fcInfinity
fcNaN
fcNormal
fcZero

Definition at line 167 of file APFloat.h.

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Constructor & Destructor Documentation

APFloat::APFloat	(	const fltSemantics &	ourSemantics,
		const char *	text
	)

Definition at line 678 of file APFloat.cpp.

References assertArithmeticOK(), convertFromString(), and rmNearestTiesToEven.

Referenced by getInf(), getNaN(), getZero(), and ReadVal().

APFloat::APFloat	(	const fltSemantics &	ourSemantics,
		integerPart	value
	)

Definition at line 654 of file APFloat.cpp.

References assertArithmeticOK(), llvm::lfExactlyZero, llvm::fltSemantics::precision, and rmNearestTiesToEven.

APFloat::APFloat	(	const fltSemantics &	ourSemantics,
		fltCategory	ourCategory,
		bool	negative
	)

Definition at line 665 of file APFloat.cpp.

References assertArithmeticOK(), fcNaN, fcNormal, and fcZero.

APFloat::APFloat

(

double

d

)

[explicit]

Definition at line 2863 of file APFloat.cpp.

References llvm::APInt::doubleToBits().

APFloat::APFloat

(

float

f

)

[explicit]

Definition at line 2857 of file APFloat.cpp.

References llvm::APInt::floatToBits().

APFloat::APFloat	(	const APInt &	api,
		bool	isIEEE = false
	)			[explicit]

Definition at line 2852 of file APFloat.cpp.

APFloat::APFloat

(

const APFloat &

rhs

)

Definition at line 685 of file APFloat.cpp.

References semantics.

APFloat::~APFloat

(

)

Definition at line 691 of file APFloat.cpp.

---

Member Function Documentation

unsigned int APFloat::semanticsPrecision

(

const fltSemantics &

semantics

)

[static]

Definition at line 708 of file APFloat.cpp.

References llvm::fltSemantics::precision.

static APFloat llvm::APFloat::getZero	(	const fltSemantics &	Sem,
		bool	Negative = false
	)			[inline, static]

Definition at line 185 of file APFloat.h.

References APFloat(), and fcZero.

static APFloat llvm::APFloat::getInf	(	const fltSemantics &	Sem,
		bool	Negative = false
	)			[inline, static]

Definition at line 188 of file APFloat.h.

References APFloat(), and fcInfinity.

static APFloat llvm::APFloat::getNaN	(	const fltSemantics &	Sem,
		bool	Negative = false
	)			[inline, static]

Definition at line 191 of file APFloat.h.

References APFloat(), and fcNaN.

void APFloat::Profile

(

FoldingSetNodeID &

NID

)

const

Profile - Used to insert APFloat objects, or objects that contain APFloat objects, into FoldingSets.

Definition at line 697 of file APFloat.cpp.

References llvm::FoldingSetNodeID::Add(), and bitcastToAPInt().

void APFloat::Emit

(

Serializer &

S

)

const

Used by the Bitcode serializer to emit APInts to Bitcode.

Definition at line 19 of file SerializeAPFloat.cpp.

References bitcastToAPInt(), and llvm::Serializer::Emit().

APFloat APFloat::ReadVal

(

Deserializer &

D

)

[static]

Used by the Bitcode deserializer to deserialize APInts.

Definition at line 19 of file DeserializeAPFloat.cpp.

References APFloat(), and llvm::Deserializer::Read().

APFloat::opStatus APFloat::add	(	const APFloat &	rhs,
		roundingMode	rounding_mode
	)

Definition at line 1465 of file APFloat.cpp.

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::ExecutionEngine::getConstantValue(), and llvm::SelectionDAG::getNode().

APFloat::opStatus APFloat::subtract	(	const APFloat &	rhs,
		roundingMode	rounding_mode
	)

Definition at line 1472 of file APFloat.cpp.

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::ExecutionEngine::getConstantValue(), llvm::SelectionDAG::getNode(), and mod().

APFloat::opStatus APFloat::multiply	(	const APFloat &	rhs,
		roundingMode	rounding_mode
	)

Definition at line 1479 of file APFloat.cpp.

References assertArithmeticOK(), fcNormal, llvm::lfExactlyZero, opInexact, and sign.

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::ExecutionEngine::getConstantValue(), llvm::SelectionDAG::getNode(), and mod().

APFloat::opStatus APFloat::divide	(	const APFloat &	rhs,
		roundingMode	rounding_mode
	)

Definition at line 1499 of file APFloat.cpp.

References assertArithmeticOK(), fcNormal, llvm::lfExactlyZero, opInexact, and sign.

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::ExecutionEngine::getConstantValue(), llvm::SelectionDAG::getNode(), and mod().

APFloat::opStatus APFloat::mod	(	const APFloat &	rhs,
		roundingMode	rounding_mode
	)

Definition at line 1519 of file APFloat.cpp.

References assertArithmeticOK(), convertFromZeroExtendedInteger(), convertToInteger(), divide(), llvm::integerPartWidth, isZero(), multiply(), opDivByZero, opInexact, opInvalidOp, opOK, rmNearestTiesToEven, subtract(), and V.

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::ExecutionEngine::getConstantValue(), and llvm::SelectionDAG::getNode().

APFloat::opStatus APFloat::fusedMultiplyAdd	(	const APFloat &	multiplicand,
		const APFloat &	addend,
		roundingMode	rounding_mode
	)

Definition at line 1556 of file APFloat.cpp.

References assertArithmeticOK(), category, fcNormal, fcZero, llvm::lfExactlyZero, opInexact, opOK, rmTowardNegative, and sign.

void APFloat::changeSign

(

)

Definition at line 1410 of file APFloat.cpp.

Referenced by GetNegatedExpression(), llvm::ConstantFP::getNegativeZero(), llvm::SelectionDAG::getNode(), and llvm::X86TargetLowering::X86TargetLowering().

void APFloat::clearSign

(

)

Definition at line 1417 of file APFloat.cpp.

Referenced by llvm::SelectionDAG::getNode().

void APFloat::copySign

(

const APFloat &

rhs

)

Definition at line 1424 of file APFloat.cpp.

References sign.

Referenced by llvm::SelectionDAG::getNode().

APFloat::opStatus APFloat::convert	(	const fltSemantics &	toSemantics,
		roundingMode	rounding_mode,
		bool *	losesInfo
	)

APFloat::convert - convert a value of one floating point type to another. The return value corresponds to the IEEE754 exceptions. *losesInfo records whether the transformation lost information, i.e. whether converting the result back to the original type will produce the original value (this is almost the same as return value==fsOK, but there are edge cases where this is not so).

Definition at line 1683 of file APFloat.cpp.

References assertArithmeticOK(), fcNaN, fcNormal, llvm::lfExactlyZero, lostFractionThroughTruncation(), opOK, partCountForBits(), llvm::fltSemantics::precision, llvm::APInt::tcAssign(), llvm::APInt::tcLSB(), llvm::APInt::tcSet(), llvm::APInt::tcShiftLeft(), llvm::APInt::tcShiftRight(), and x87DoubleExtended.

Referenced by llvm::ConstantFoldCastInstruction(), llvm::AsmPrinter::EmitGlobalConstant(), FitsInFPType(), llvm::ConstantFP::get(), llvm::SelectionDAG::getNode(), llvm::ConstantFPSDNode::isExactlyValue(), llvm::ConstantFP::isExactlyValue(), isFPCSafeToPrint(), llvm::ConstantFPSDNode::isValueValidForType(), llvm::ConstantFP::isValueValidForType(), LLVMConstReal(), and llvm::X86TargetLowering::X86TargetLowering().

APFloat::opStatus APFloat::convertToInteger	(	integerPart *	parts,
		unsigned int	width,
		bool	isSigned,
		roundingMode	rounding_mode,
		bool *	isExact
	)			const

Definition at line 1893 of file APFloat.cpp.

References fcNaN, opInvalidOp, partCountForBits(), llvm::APInt::tcSetLeastSignificantBits(), and llvm::APInt::tcShiftLeft().

Referenced by llvm::ConstantFoldCastInstruction(), llvm::FastISel::FastEmit_rf_(), llvm::ExecutionEngine::getConstantValue(), llvm::SelectionDAG::getNode(), llvm::FastISel::getRegForValue(), and mod().

APFloat::opStatus APFloat::convertFromAPInt	(	const APInt &	Val,
		bool	isSigned,
		roundingMode	rounding_mode
	)

Definition at line 1958 of file APFloat.cpp.

References llvm::APInt::getNumWords(), llvm::APInt::getRawData(), and llvm::APInt::isNegative().

Referenced by llvm::ConstantFoldCastInstruction(), llvm::ExecutionEngine::getConstantValue(), and llvm::SelectionDAG::getNode().

APFloat::opStatus APFloat::convertFromSignExtendedInteger	(	const integerPart *	src,
		unsigned int	srcCount,
		bool	isSigned,
		roundingMode	rounding_mode
	)

Definition at line 1978 of file APFloat.cpp.

References assertArithmeticOK(), llvm::integerPartWidth, llvm::APInt::tcAssign(), llvm::APInt::tcExtractBit(), and llvm::APInt::tcNegate().

APFloat::opStatus APFloat::convertFromZeroExtendedInteger	(	const integerPart *	parts,
		unsigned int	width,
		bool	isSigned,
		roundingMode	rounding_mode
	)

Definition at line 2007 of file APFloat.cpp.

References llvm::APInt::getRawData(), partCountForBits(), and llvm::APInt::tcExtractBit().

Referenced by mod().

APFloat::opStatus APFloat::convertFromString	(	const char *	p,
		roundingMode	rounding_mode
	)

Definition at line 2281 of file APFloat.cpp.

References assertArithmeticOK().

Referenced by APFloat().

APInt APFloat::bitcastToAPInt

(

)

const

Definition at line 2643 of file APFloat.cpp.

References IEEEdouble, IEEEsingle, PPCDoubleDouble, and x87DoubleExtended.

Referenced by convertToDouble(), convertToFloat(), Emit(), ExpandConstantFP(), llvm::ExecutionEngine::getConstantValue(), llvm::SelectionDAG::getNode(), and Profile().

double APFloat::convertToDouble

(

)

const

Definition at line 2668 of file APFloat.cpp.

References bitcastToAPInt(), llvm::APInt::bitsToDouble(), and IEEEdouble.

Referenced by llvm::AsmPrinter::EmitGlobalConstant(), llvm::ftostr(), GetConstantBuildVectorBits(), isFPCSafeToPrint(), LowerConstantFP(), and llvm::MachineOperand::print().

float APFloat::convertToFloat

(

)

const

Definition at line 2660 of file APFloat.cpp.

References bitcastToAPInt(), llvm::APInt::bitsToFloat(), and IEEEsingle.

Referenced by llvm::ftostr(), GetConstantBuildVectorBits(), isFPS16Immediate(), and llvm::MachineOperand::print().

APFloat::cmpResult APFloat::compare

(

const APFloat &

rhs

)

const

Definition at line 1603 of file APFloat.cpp.

References assertArithmeticOK(), category, cmpEqual, cmpGreaterThan, cmpLessThan, cmpUnordered, convolve, fcInfinity, fcNaN, fcNormal, fcZero, semantics, and sign.

Referenced by llvm::ConstantFoldCompareInstruction(), llvm::ValID::operator<(), and llvm::ValID::operator==().

bool APFloat::bitwiseIsEqual

(

const APFloat &

rhs

)

const

Definition at line 625 of file APFloat.cpp.

References category, exponent, exponent2, fcInfinity, fcNormal, fcZero, PPCDoubleDouble, semantics, sign, sign2, and significandParts().

Referenced by llvm::ConstantFPSDNode::isExactlyValue(), llvm::ConstantFP::isExactlyValue(), and isFPCSafeToPrint().

unsigned int APFloat::convertToHexString	(	char *	dst,
		unsigned int	hexDigits,
		bool	upperCase,
		roundingMode	rounding_mode
	)			const

Definition at line 2322 of file APFloat.cpp.

References assertArithmeticOK(), fcInfinity, fcNaN, fcNormal, fcZero, infinityL, infinityU, NaNL, and NaNU.

fltCategory llvm::APFloat::getCategory

(

)

const [inline]

Definition at line 253 of file APFloat.h.

const fltSemantics& llvm::APFloat::getSemantics

(

)

const [inline]

Definition at line 254 of file APFloat.h.

Referenced by llvm::ConstantFP::ConstantFP(), llvm::ftostr(), llvm::ConstantFP::get(), llvm::ConstantFP::isExactlyValue(), llvm::ConstantFPSDNode::isValueValidForType(), and llvm::ConstantFP::isValueValidForType().

bool llvm::APFloat::isZero

(

)

const [inline]

Definition at line 255 of file APFloat.h.

References fcZero.

Referenced by llvm::ConstantFoldBinaryInstruction(), isNegZero(), llvm::ConstantFP::isNullValue(), isPosZero(), and mod().

bool llvm::APFloat::isNonZero

(

)

const [inline]

Definition at line 256 of file APFloat.h.

References fcZero.

bool llvm::APFloat::isNaN

(

)

const [inline]

Definition at line 257 of file APFloat.h.

References fcNaN.

bool llvm::APFloat::isInfinity

(

)

const [inline]

Definition at line 258 of file APFloat.h.

References fcInfinity.

bool llvm::APFloat::isNegative

(

)

const [inline]

Definition at line 259 of file APFloat.h.

Referenced by isNegZero(), llvm::ConstantFP::isNullValue(), and isPosZero().

bool llvm::APFloat::isPosZero

(

)

const [inline]

Definition at line 260 of file APFloat.h.

References isNegative(), and isZero().

bool llvm::APFloat::isNegZero

(

)

const [inline]

Definition at line 261 of file APFloat.h.

References isNegative(), and isZero().

APFloat & APFloat::operator=

(

const APFloat &

rhs

)

Definition at line 611 of file APFloat.cpp.

References semantics.

uint32_t APFloat::getHashValue

(

)

const

Definition at line 2478 of file APFloat.cpp.

References fcInfinity, fcNaN, fcZero, and llvm::fltSemantics::precision.

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Member Data Documentation

const fltSemantics llvm::APFloat::IEEEsingle = { 127, -126, 24, true } [static]

Definition at line 127 of file APFloat.h.

Referenced by bitcastToAPInt(), llvm::ConstantFoldCastInstruction(), convertToFloat(), llvm::ftostr(), llvm::ConstantFP::get(), llvm::ScalarEvolution::getIntegerSCEV(), llvm::ConstantFP::isValueValidForType(), llvm::SDNode::print(), TypeToFloatSemantics(), and WriteConstantInt().

const fltSemantics llvm::APFloat::IEEEdouble = { 1023, -1022, 53, true } [static]

Definition at line 128 of file APFloat.h.

Referenced by bitcastToAPInt(), llvm::ConstantFoldCastInstruction(), convertToDouble(), llvm::AsmPrinter::EmitGlobalConstant(), llvm::ftostr(), llvm::ConstantFP::get(), llvm::ScalarEvolution::getIntegerSCEV(), llvm::ConstantFP::isValueValidForType(), llvm::SDNode::print(), TypeToFloatSemantics(), and WriteConstantInt().

const fltSemantics llvm::APFloat::IEEEquad = { 16383, -16382, 113, true } [static]

Definition at line 129 of file APFloat.h.

Referenced by llvm::ConstantFoldCastInstruction(), llvm::ConstantFP::get(), llvm::ConstantFP::isValueValidForType(), TypeToFloatSemantics(), and WriteConstantInt().

const fltSemantics llvm::APFloat::PPCDoubleDouble = { 1023, -1022, 106, false } [static]

Definition at line 130 of file APFloat.h.

Referenced by bitcastToAPInt(), bitwiseIsEqual(), llvm::ConstantFP::get(), llvm::ConstantFPSDNode::isExactlyValue(), llvm::ConstantFP::isExactlyValue(), llvm::ConstantFPSDNode::isValueValidForType(), llvm::ConstantFP::isValueValidForType(), TypeToFloatSemantics(), and WriteConstantInt().

const fltSemantics llvm::APFloat::x87DoubleExtended = { 16383, -16382, 64, true } [static]

Definition at line 131 of file APFloat.h.

Referenced by bitcastToAPInt(), llvm::ConstantFoldCastInstruction(), convert(), llvm::ConstantFP::get(), llvm::ConstantFP::isValueValidForType(), TypeToFloatSemantics(), WriteConstantInt(), and llvm::X86TargetLowering::X86TargetLowering().

const fltSemantics llvm::APFloat::Bogus = { 0, 0, 0, true } [static]

Definition at line 134 of file APFloat.h.

Referenced by llvm::ConstantFoldCastInstruction().

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

• APFloat.h
• DeserializeAPFloat.cpp
• SerializeAPFloat.cpp
• APFloat.cpp