A self-contained host- and target-independent arbitrary-precision floating-point software implementation. More...

#include "llvm/ADT/APFloat.h"

Inheritance diagram for llvm::APFloatBase:

[legend]

Public Types
enum	cmpResult { cmpLessThan , cmpEqual , cmpGreaterThan , cmpUnordered }
	IEEE-754R 5.11: Floating Point Comparison Relations. More...

enum	opStatus { opOK = 0x00 , opInvalidOp = 0x01 , opDivByZero = 0x02 , opOverflow = 0x04 , opUnderflow = 0x08 , opInexact = 0x10 }
	IEEE-754R 7: Default exception handling. More...

enum	fltCategory { fcInfinity , fcNaN , fcNormal , fcZero }
	Category of internally-represented number. More...

enum	uninitializedTag { uninitialized }
	Convenience enum used to construct an uninitialized APFloat. More...

enum	IlogbErrorKinds { IEK_Zero = INT_MIN + 1 , IEK_NaN = INT_MIN , IEK_Inf = INT_MAX }
	Enumeration of `ilogb` error results. More...

typedef APInt::WordType	integerPart

typedef int32_t	ExponentType
	A signed type to represent a floating point numbers unbiased exponent.

using	roundingMode = llvm::RoundingMode
	IEEE-754R 4.3: Rounding-direction attributes.

Static Public Member Functions
static unsigned int	semanticsPrecision (const fltSemantics &)

static ExponentType	semanticsMinExponent (const fltSemantics &)

static ExponentType	semanticsMaxExponent (const fltSemantics &)

static unsigned int	semanticsSizeInBits (const fltSemantics &)

static unsigned int	semanticsIntSizeInBits (const fltSemantics &, bool)

static bool	isRepresentableAsNormalIn (const fltSemantics &Src, const fltSemantics &Dst)

static unsigned	getSizeInBits (const fltSemantics &Sem)
	Returns the size of the floating point number (in bits) in the given semantics.

Static Public Attributes
static constexpr unsigned	integerPartWidth = APInt::APINT_BITS_PER_WORD

static constexpr roundingMode	rmNearestTiesToEven

static constexpr roundingMode	rmTowardPositive = RoundingMode::TowardPositive

static constexpr roundingMode	rmTowardNegative = RoundingMode::TowardNegative

static constexpr roundingMode	rmTowardZero = RoundingMode::TowardZero

static constexpr roundingMode	rmNearestTiesToAway

Floating Point Semantics.
enum	Semantics { S_IEEEhalf , S_BFloat , S_IEEEsingle , S_IEEEdouble , S_IEEEquad , S_PPCDoubleDouble , S_Float8E5M2 , S_Float8E5M2FNUZ , S_Float8E4M3 , S_Float8E4M3FN , S_Float8E4M3FNUZ , S_Float8E4M3B11FNUZ , S_Float8E3M4 , S_FloatTF32 , S_Float6E3M2FN , S_Float6E2M3FN , S_Float4E2M1FN , S_x87DoubleExtended , S_MaxSemantics = S_x87DoubleExtended }

static const llvm::fltSemantics &	EnumToSemantics (Semantics S)

static Semantics	SemanticsToEnum (const llvm::fltSemantics &Sem)

static const fltSemantics &	IEEEhalf () LLVM_READNONE

static const fltSemantics &	BFloat () LLVM_READNONE

static const fltSemantics &	IEEEsingle () LLVM_READNONE

static const fltSemantics &	IEEEdouble () LLVM_READNONE

static const fltSemantics &	IEEEquad () LLVM_READNONE

static const fltSemantics &	PPCDoubleDouble () LLVM_READNONE

static const fltSemantics &	Float8E5M2 () LLVM_READNONE

static const fltSemantics &	Float8E5M2FNUZ () LLVM_READNONE

static const fltSemantics &	Float8E4M3 () LLVM_READNONE

static const fltSemantics &	Float8E4M3FN () LLVM_READNONE

static const fltSemantics &	Float8E4M3FNUZ () LLVM_READNONE

static const fltSemantics &	Float8E4M3B11FNUZ () LLVM_READNONE

static const fltSemantics &	Float8E3M4 () LLVM_READNONE

static const fltSemantics &	FloatTF32 () LLVM_READNONE

static const fltSemantics &	Float6E3M2FN () LLVM_READNONE

static const fltSemantics &	Float6E2M3FN () LLVM_READNONE

static const fltSemantics &	Float4E2M1FN () LLVM_READNONE

static const fltSemantics &	x87DoubleExtended () LLVM_READNONE

static const fltSemantics &	Bogus () LLVM_READNONE
	A Pseudo fltsemantic used to construct APFloats that cannot conflict with anything real.

Detailed Description

A self-contained host- and target-independent arbitrary-precision floating-point software implementation.

APFloat uses bignum integer arithmetic as provided by static functions in the APInt class. The library will work with bignum integers whose parts are any unsigned type at least 16 bits wide, but 64 bits is recommended.

Written for clarity rather than speed, in particular with a view to use in the front-end of a cross compiler so that target arithmetic can be correctly performed on the host. Performance should nonetheless be reasonable, particularly for its intended use. It may be useful as a base implementation for a run-time library during development of a faster target-specific one.

All 5 rounding modes in the IEEE-754R draft are handled correctly for all implemented operations. Currently implemented operations are add, subtract, multiply, divide, fused-multiply-add, conversion-to-float, conversion-to-integer and conversion-from-integer. New rounding modes (e.g. away from zero) can be added with three or four lines of code.

Four formats are built-in: IEEE single precision, double precision, quadruple precision, and x87 80-bit extended double (when operating with full extended precision). Adding a new format that obeys IEEE semantics only requires adding two lines of code: a declaration and definition of the format.

All operations return the status of that operation as an exception bit-mask, so multiple operations can be done consecutively with their results or-ed together. The returned status can be useful for compiler diagnostics; e.g., inexact, underflow and overflow can be easily diagnosed on constant folding, and compiler optimizers can determine what exceptions would be raised by folding operations and optimize, or perhaps not optimize, accordingly.

At present, underflow tininess is detected after rounding; it should be straight forward to add support for the before-rounding case too.

The library reads hexadecimal floating point numbers as per C99, and correctly rounds if necessary according to the specified rounding mode. Syntax is required to have been validated by the caller. It also converts floating point numbers to hexadecimal text as per the C99 a and A conversions. The output precision (or alternatively the natural minimal precision) can be specified; if the requested precision is less than the natural precision the output is correctly rounded for the specified rounding mode.

It also reads decimal floating point numbers and correctly rounds according to the specified rounding mode.

Conversion to decimal text is not currently implemented.

Non-zero finite numbers are represented internally as a sign bit, a 16-bit signed exponent, and the significand as an array of integer parts. After normalization of a number of precision P the exponent is within the range of the format, and if the number is not denormal the P-th bit of the significand is set as an explicit integer bit. For denormals the most significant bit is shifted right so that the exponent is maintained at the format's minimum, so that the smallest denormal has just the least significant bit of the significand set. The sign of zeroes and infinities is significant; the exponent and significand of such numbers is not stored, but has a known implicit (deterministic) value: 0 for the significands, 0 for zero exponent, all 1 bits for infinity exponent. For NaNs the sign and significand are deterministic, although not really meaningful, and preserved in non-conversion operations. The exponent is implicitly all 1 bits.

APFloat does not provide any exception handling beyond default exception handling. We represent Signaling NaNs via IEEE-754R 2008 6.2.1 should clause by encoding Signaling NaNs with the first bit of its trailing significand as 0.

TODO

Some features that may or may not be worth adding:

Binary to decimal conversion (hard).

Optional ability to detect underflow tininess before rounding.

New formats: x87 in single and double precision mode (IEEE apart from extended exponent range) (hard).

New operations: sqrt, IEEE remainder, C90 fmod, nexttoward.

Definition at line 143 of file APFloat.h.

Member Typedef Documentation

◆ ExponentType

typedef int32_t llvm::APFloatBase::ExponentType

A signed type to represent a floating point numbers unbiased exponent.

Definition at line 148 of file APFloat.h.

◆ integerPart

typedef APInt::WordType llvm::APFloatBase::integerPart

Definition at line 144 of file APFloat.h.

◆ roundingMode

using llvm::APFloatBase::roundingMode = llvm::RoundingMode

IEEE-754R 4.3: Rounding-direction attributes.

Definition at line 252 of file APFloat.h.

Member Enumeration Documentation

◆ cmpResult

enum llvm::APFloatBase::cmpResult

IEEE-754R 5.11: Floating Point Comparison Relations.

Enumerator
cmpLessThan
cmpEqual
cmpGreaterThan
cmpUnordered

Definition at line 244 of file APFloat.h.

◆ fltCategory

enum llvm::APFloatBase::fltCategory

Category of internally-represented number.

Enumerator
fcInfinity
fcNaN
fcNormal
fcZero

Definition at line 280 of file APFloat.h.

◆ IlogbErrorKinds

enum llvm::APFloatBase::IlogbErrorKinds

Enumeration of ilogb error results.

Enumerator
IEK_Zero
IEK_NaN
IEK_Inf

Definition at line 293 of file APFloat.h.

◆ opStatus

enum llvm::APFloatBase::opStatus

IEEE-754R 7: Default exception handling.

opUnderflow or opOverflow are always returned or-ed with opInexact.

APFloat models this behavior specified by IEEE-754: "For operations producing results in floating-point format, the default result of an operation that signals the invalid operation exception shall be a quiet NaN."

Enumerator
opOK
opInvalidOp
opDivByZero
opOverflow
opUnderflow
opInexact

Definition at line 270 of file APFloat.h.

◆ Semantics

enum llvm::APFloatBase::Semantics

Enumerator
S_IEEEhalf
S_BFloat
S_IEEEsingle
S_IEEEdouble
S_IEEEquad
S_PPCDoubleDouble
S_Float8E5M2
S_Float8E5M2FNUZ
S_Float8E4M3
S_Float8E4M3FN
S_Float8E4M3FNUZ
S_Float8E4M3B11FNUZ
S_Float8E3M4
S_FloatTF32
S_Float6E3M2FN
S_Float6E2M3FN
S_Float4E2M1FN
S_x87DoubleExtended
S_MaxSemantics

Definition at line 152 of file APFloat.h.

◆ uninitializedTag

enum llvm::APFloatBase::uninitializedTag

Convenience enum used to construct an uninitialized APFloat.

Enumerator
uninitialized

Definition at line 288 of file APFloat.h.

Member Function Documentation

◆ BFloat()

const fltSemantics & llvm::APFloatBase::BFloat ( )

static

Definition at line 280 of file APFloat.cpp.

References llvm::semBFloat.

Referenced by EnumToSemantics(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::ConstantDataSequential::getElementAsAPFloat(), llvm::MVT::getFltSemantics(), llvm::ConstantFP::isValueValidForType(), llvm::NVPTXFloatMCExpr::printImpl(), llvm::APFixedPoint::promoteFloatSemantics(), SemanticsToEnum(), shrinkFPConstant(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

◆ Bogus()

const fltSemantics & llvm::APFloatBase::Bogus ( )

static

A Pseudo fltsemantic used to construct APFloats that cannot conflict with anything real.

Definition at line 303 of file APFloat.cpp.

References llvm::semBogus.

Referenced by llvm::DenseMapInfo< APFloat >::getEmptyKey(), and llvm::DenseMapInfo< APFloat >::getTombstoneKey().

◆ EnumToSemantics()

const llvm::fltSemantics & llvm::APFloatBase::EnumToSemantics ( Semantics S )

static

◆ Float4E2M1FN()

const fltSemantics & llvm::APFloatBase::Float4E2M1FN ( )

static

Definition at line 299 of file APFloat.cpp.

References llvm::semFloat4E2M1FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float6E2M3FN()

const fltSemantics & llvm::APFloatBase::Float6E2M3FN ( )

static

Definition at line 298 of file APFloat.cpp.

References llvm::semFloat6E2M3FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float6E3M2FN()

const fltSemantics & llvm::APFloatBase::Float6E3M2FN ( )

static

Definition at line 297 of file APFloat.cpp.

References llvm::semFloat6E3M2FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E3M4()

const fltSemantics & llvm::APFloatBase::Float8E3M4 ( )

static

Definition at line 295 of file APFloat.cpp.

References llvm::semFloat8E3M4.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3()

const fltSemantics & llvm::APFloatBase::Float8E4M3 ( )

static

Definition at line 289 of file APFloat.cpp.

References llvm::semFloat8E4M3.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3B11FNUZ()

const fltSemantics & llvm::APFloatBase::Float8E4M3B11FNUZ ( )

static

Definition at line 292 of file APFloat.cpp.

References llvm::semFloat8E4M3B11FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3FN()

const fltSemantics & llvm::APFloatBase::Float8E4M3FN ( )

static

Definition at line 290 of file APFloat.cpp.

References llvm::semFloat8E4M3FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3FNUZ()

const fltSemantics & llvm::APFloatBase::Float8E4M3FNUZ ( )

static

Definition at line 291 of file APFloat.cpp.

References llvm::semFloat8E4M3FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E5M2()

const fltSemantics & llvm::APFloatBase::Float8E5M2 ( )

static

Definition at line 287 of file APFloat.cpp.

References llvm::semFloat8E5M2.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E5M2FNUZ()

const fltSemantics & llvm::APFloatBase::Float8E5M2FNUZ ( )

static

Definition at line 288 of file APFloat.cpp.

References llvm::semFloat8E5M2FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ FloatTF32()

const fltSemantics & llvm::APFloatBase::FloatTF32 ( )

static

Definition at line 296 of file APFloat.cpp.

References llvm::semFloatTF32.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ getSizeInBits()

unsigned llvm::APFloatBase::getSizeInBits ( const fltSemantics & Sem )

static

Returns the size of the floating point number (in bits) in the given semantics.

Definition at line 368 of file APFloat.cpp.

References llvm::fltSemantics::sizeInBits.

Referenced by llvm::MachineIRBuilder::buildFConstant().

◆ IEEEdouble()

const fltSemantics & llvm::APFloatBase::IEEEdouble ( )

static

Definition at line 282 of file APFloat.cpp.

References llvm::semIEEEdouble.

Referenced by combineBitcast(), constantFoldFpUnary(), emitDebugValueComment(), EnumToSemantics(), fixFuncEntryCount(), llvm::SelectionDAG::FoldConstantArithmetic(), getConstantVector(), getConstVector(), llvm::ConstantDataSequential::getElementAsAPFloat(), llvm::MVT::getFltSemantics(), llvm::RISCVLoadFPImm::getLoadFPImm(), isInv2Pi(), llvm::ConstantFP::isValueValidForType(), llvm::AMDGPULegalizerInfo::legalizeFroundeven(), llvm::AMDGPULegalizerInfo::legalizeRsqClampIntrinsic(), llvm::LegalizerHelper::lowerFPTOUI(), llvm::AMDGPUTargetLowering::LowerFROUNDEVEN(), llvm::ARMAsmPrinter::lowerOperand(), LowerUINT_TO_FP_i64(), lowerUINT_TO_FP_vXi32(), llvm::SDNode::print_details(), llvm::NVPTXFloatMCExpr::printImpl(), llvm::WebAssemblyInstPrinter::printOperand(), llvm::APFixedPoint::promoteFloatSemantics(), SemanticsToEnum(), shrinkFPConstant(), and WriteAPFloatInternal().

◆ IEEEhalf()

const fltSemantics & llvm::APFloatBase::IEEEhalf ( )

static

◆ IEEEquad()

const fltSemantics & llvm::APFloatBase::IEEEquad ( )

static

Definition at line 283 of file APFloat.cpp.

References llvm::semIEEEquad.

Referenced by EnumToSemantics(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::MVT::getFltSemantics(), llvm::ConstantFP::isValueValidForType(), llvm::APFixedPoint::promoteFloatSemantics(), SemanticsToEnum(), llvm::SystemZVectorConstantInfo::SystemZVectorConstantInfo(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

◆ IEEEsingle()

const fltSemantics & llvm::APFloatBase::IEEEsingle ( )

static

Definition at line 281 of file APFloat.cpp.

References llvm::semIEEEsingle.

Referenced by llvm::checkConvertToNonDenormSingle(), llvm::convertToNonDenormSingle(), EnumToSemantics(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::generateReadImageInst(), getConstantVector(), getConstVector(), llvm::Function::getDenormalMode(), llvm::ConstantDataSequential::getElementAsAPFloat(), getF32Constant(), llvm::MVT::getFltSemantics(), llvm::RISCVLoadFPImm::getLoadFPImm(), llvm::AMDGPULegalizerInfo::getScaledLogInput(), llvm::AMDGPUTargetLowering::getScaledLogInput(), llvm::Attributor::identifyDefaultAbstractAttributes(), isInv2Pi(), llvm::ConstantFP::isValueValidForType(), llvm::AMDGPULegalizerInfo::legalizeFExp(), llvm::AMDGPULegalizerInfo::legalizeFlogCommon(), llvm::AMDGPULegalizerInfo::legalizeRsqClampIntrinsic(), llvm::AMDGPUTargetLowering::lowerFEXP(), llvm::LegalizerHelper::lowerFPTOUI(), lowerUINT_TO_FP_vXi32(), needsDenormHandlingF32(), llvm::AMDGPUTargetLowering::needsDenormHandlingF32(), llvm::SDNode::print_details(), llvm::NVPTXFloatMCExpr::printImpl(), llvm::WebAssemblyInstPrinter::printOperand(), llvm::APFixedPoint::promoteFloatSemantics(), SemanticsToEnum(), shrinkFPConstant(), simplifyNvvmIntrinsic(), llvm::pdb::Variant::toAPFloat(), llvm::NVPTXTargetLowering::useF32FTZ(), valueHasFloatPrecision(), and WriteAPFloatInternal().

◆ isRepresentableAsNormalIn()

bool llvm::APFloatBase::isRepresentableAsNormalIn	(	const fltSemantics &	Src,
		const fltSemantics &	Dst
	)

static

Definition at line 354 of file APFloat.cpp.

Referenced by computeKnownFPClass().

◆ PPCDoubleDouble()

const fltSemantics & llvm::APFloatBase::PPCDoubleDouble ( )

static

Definition at line 284 of file APFloat.cpp.

References llvm::semPPCDoubleDouble.

Referenced by EnumToSemantics(), llvm::MVT::getFltSemantics(), llvm::ConstantFP::isValueValidForType(), SemanticsToEnum(), and WriteAPFloatInternal().

◆ semanticsIntSizeInBits()

unsigned int llvm::APFloatBase::semanticsIntSizeInBits	(	const fltSemantics &	semantics,
		bool	isSigned
	)

static

Definition at line 343 of file APFloat.cpp.

References isSigned(), and semanticsMaxExponent().

Referenced by canEvaluateTruncated(), and isSaturatingMinMax().

◆ semanticsMaxExponent()

APFloatBase::ExponentType llvm::APFloatBase::semanticsMaxExponent ( const fltSemantics & semantics )

static

Definition at line 333 of file APFloat.cpp.

References llvm::fltSemantics::maxExponent.

Referenced by llvm::FunctionComparator::cmpAPFloats(), and semanticsIntSizeInBits().

◆ semanticsMinExponent()

APFloatBase::ExponentType llvm::APFloatBase::semanticsMinExponent ( const fltSemantics & semantics )

static

Definition at line 337 of file APFloat.cpp.

References llvm::fltSemantics::minExponent.

Referenced by llvm::FunctionComparator::cmpAPFloats().

◆ semanticsPrecision()

unsigned int llvm::APFloatBase::semanticsPrecision ( const fltSemantics & semantics )

static

Definition at line 329 of file APFloat.cpp.

References llvm::fltSemantics::precision.

Referenced by CastIntSETCCtoFP(), llvm::FunctionComparator::cmpAPFloats(), computeKnownFPClass(), FoldIntToFPToInt(), getEstimate(), lowerFTRUNC_FCEIL_FFLOOR_FROUND(), lowerVectorFTRUNC_FCEIL_FFLOOR_FROUND(), lowerVectorStrictFTRUNC_FCEIL_FFLOOR_FROUND(), and llvm::detail::IEEEFloat::roundToIntegral().

◆ semanticsSizeInBits()

unsigned int llvm::APFloatBase::semanticsSizeInBits ( const fltSemantics & semantics )

static

Definition at line 340 of file APFloat.cpp.

References llvm::fltSemantics::sizeInBits.

Referenced by llvm::FunctionComparator::cmpAPFloats().

◆ SemanticsToEnum()

APFloatBase::Semantics llvm::APFloatBase::SemanticsToEnum ( const llvm::fltSemantics & Sem )

static

◆ x87DoubleExtended()

const fltSemantics & llvm::APFloatBase::x87DoubleExtended ( )

static

Definition at line 300 of file APFloat.cpp.

References llvm::semX87DoubleExtended.

Referenced by EnumToSemantics(), llvm::ExecutionEngine::getConstantValue(), llvm::MVT::getFltSemantics(), llvm::ConstantFP::isValueValidForType(), SemanticsToEnum(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

Member Data Documentation

◆ integerPartWidth

constexpr unsigned llvm::APFloatBase::integerPartWidth = APInt::APINT_BITS_PER_WORD

staticconstexpr

Definition at line 145 of file APFloat.h.

Referenced by llvm::detail::IEEEFloat::convertFromSignExtendedInteger(), llvm::lostFractionThroughTruncation(), llvm::partAsHex(), llvm::partCountForBits(), and llvm::ulpsFromBoundary().

◆ rmNearestTiesToAway

constexpr RoundingMode llvm::APFloatBase::rmNearestTiesToAway

staticconstexpr

Initial value:

=

RoundingMode::NearestTiesToAway

llvm::RoundingMode::NearestTiesToAway

@ NearestTiesToAway

roundTiesToAway.

Definition at line 259 of file APFloat.h.

Referenced by llvm::FixedPointSemantics::fitsInFloatSemantics().

◆ rmNearestTiesToEven

constexpr RoundingMode llvm::APFloatBase::rmNearestTiesToEven

staticconstexpr

Initial value:

=

RoundingMode::NearestTiesToEven

llvm::RoundingMode::NearestTiesToEven

@ NearestTiesToEven

roundTiesToEven.

Definition at line 254 of file APFloat.h.

Referenced by llvm::APFloat::APFloat(), llvm::checkConvertToNonDenormSingle(), constantFoldFpUnary(), llvm::APFloat::convertToDouble(), llvm::APFloat::convertToFloat(), llvm::APFixedPoint::convertToFloat(), llvm::convertToNonDenormSingle(), emitDebugValueComment(), llvm::TargetLowering::expandFP_TO_UINT(), fitsInFPType(), fixFuncEntryCount(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::SelectionDAG::foldConstantFPMath(), llvm::InstCombinerImpl::foldFCmpIntToFPConst(), llvm::ConstantFP::get(), llvm::StringRef::getAsDouble(), llvm::SelectionDAG::getConstantFP(), llvm::ExecutionEngine::getConstantValue(), llvm::RISCVLoadFPImm::getLoadFPImm(), llvm::SelectionDAG::getNode(), llvm::detail::IEEEFloat::IEEEFloat(), llvm::GCNTTIImpl::instCombineIntrinsic(), llvm::APFloat::isExactlyValue(), llvm::ConstantFP::isExactlyValue(), isFPExtFromF16OrConst(), llvm::ConstantFPSDNode::isValueValidForType(), llvm::ConstantFP::isValueValidForType(), llvm::LegalizerHelper::lowerFPTOUI(), LowerFROUND(), lowerFTRUNC_FCEIL_FFLOOR_FROUND(), lowerVectorFTRUNC_FCEIL_FFLOOR_FROUND(), lowerVectorStrictFTRUNC_FCEIL_FFLOOR_FROUND(), llvm::CombinerHelper::matchConstantFoldFMA(), matchFPExtFromF16(), llvm::detail::IEEEFloat::mod(), llvm::APFloat::operator*(), llvm::APFloat::operator+(), llvm::APFloat::operator-(), llvm::APFloat::operator/(), llvm::AMDGPUTargetLowering::PerformDAGCombine(), llvm::NVPTXFloatMCExpr::printImpl(), llvm::detail::IEEEFloat::remainder(), llvm::detail::IEEEFloat::roundToIntegral(), strictFPExtFromF16(), toString(), valueHasFloatPrecision(), llvm::InstCombinerImpl::visitFCmpInst(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

◆ rmTowardNegative

constexpr RoundingMode llvm::APFloatBase::rmTowardNegative = RoundingMode::TowardNegative

staticconstexpr

Definition at line 257 of file APFloat.h.

Referenced by llvm::SelectionDAG::FoldConstantArithmetic(), and llvm::detail::IEEEFloat::fusedMultiplyAdd().

◆ rmTowardPositive

constexpr RoundingMode llvm::APFloatBase::rmTowardPositive = RoundingMode::TowardPositive

staticconstexpr

Definition at line 256 of file APFloat.h.

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

◆ rmTowardZero

constexpr RoundingMode llvm::APFloatBase::rmTowardZero = RoundingMode::TowardZero

staticconstexpr

Definition at line 258 of file APFloat.h.

Referenced by llvm::APFixedPoint::convertToFloat(), llvm::TargetLowering::expandFP_TO_INT_SAT(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::InstCombinerImpl::foldFCmpIntToFPConst(), llvm::BuildVectorSDNode::getConstantFPSplatPow2ToLog2Int(), llvm::ExecutionEngine::getConstantValue(), llvm::APFixedPoint::getFromFloatValue(), llvm::GCNTTIImpl::instCombineIntrinsic(), llvm::PPCTargetLowering::isFPImmLegal(), llvm::detail::IEEEFloat::isInteger(), llvm::ARMAsmPrinter::lowerOperand(), and PerformVMulVCTPCombine().

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

include/llvm/ADT/APFloat.h
lib/Support/APFloat.cpp

Public Types

Static Public Member Functions

Static Public Attributes

Floating Point Semantics.

Detailed Description

TODO

Member Typedef Documentation

◆ ExponentType

◆ integerPart

◆ roundingMode

Member Enumeration Documentation

◆ cmpResult

◆ fltCategory

◆ IlogbErrorKinds

◆ opStatus

◆ Semantics

◆ uninitializedTag

Member Function Documentation

◆ BFloat()

◆ Bogus()

◆ EnumToSemantics()

◆ Float4E2M1FN()

◆ Float6E2M3FN()

◆ Float6E3M2FN()

◆ Float8E3M4()

◆ Float8E4M3()

◆ Float8E4M3B11FNUZ()

◆ Float8E4M3FN()

◆ Float8E4M3FNUZ()

◆ Float8E5M2()

◆ Float8E5M2FNUZ()

◆ FloatTF32()

◆ getSizeInBits()

◆ IEEEdouble()

◆ IEEEhalf()

◆ IEEEquad()

◆ IEEEsingle()

◆ isRepresentableAsNormalIn()

◆ PPCDoubleDouble()

◆ semanticsIntSizeInBits()

◆ semanticsMaxExponent()

◆ semanticsMinExponent()

◆ semanticsPrecision()

◆ semanticsSizeInBits()

◆ SemanticsToEnum()

◆ x87DoubleExtended()

Member Data Documentation

◆ integerPartWidth

◆ rmNearestTiesToAway

◆ rmNearestTiesToEven

◆ rmTowardNegative

◆ rmTowardPositive

◆ rmTowardZero