LLVM 20.0.0git
Public Types | Static Public Member Functions | Static Public Attributes | List of all members
llvm::APFloatBase Struct Reference

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

#include "llvm/ADT/APFloat.h"

Inheritance diagram for llvm::APFloatBase:
Inheritance graph
[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 semanticsHasZero (const fltSemantics &)
 
static bool semanticsHasSignedRepr (const fltSemantics &)
 
static bool semanticsHasInf (const fltSemantics &)
 
static bool semanticsHasNaN (const fltSemantics &)
 
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_PPCDoubleDoubleLegacy , S_Float8E5M2 ,
  S_Float8E5M2FNUZ , S_Float8E4M3 , S_Float8E4M3FN , S_Float8E4M3FNUZ ,
  S_Float8E4M3B11FNUZ , S_Float8E3M4 , S_FloatTF32 , S_Float8E8M0FNU ,
  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 & PPCDoubleDoubleLegacy () 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 & Float8E8M0FNU () 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 295 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 287 of file APFloat.h.

◆ fltCategory

enum llvm::APFloatBase::fltCategory

Category of internally-represented number.

Enumerator
fcInfinity 
fcNaN 
fcNormal 
fcZero 

Definition at line 323 of file APFloat.h.

◆ IlogbErrorKinds

enum llvm::APFloatBase::IlogbErrorKinds

Enumeration of ilogb error results.

Enumerator
IEK_Zero 
IEK_NaN 
IEK_Inf 

Definition at line 336 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 313 of file APFloat.h.

◆ Semantics

enum llvm::APFloatBase::Semantics
Enumerator
S_IEEEhalf 
S_BFloat 
S_IEEEsingle 
S_IEEEdouble 
S_IEEEquad 
S_PPCDoubleDouble 
S_PPCDoubleDoubleLegacy 
S_Float8E5M2 
S_Float8E5M2FNUZ 
S_Float8E4M3 
S_Float8E4M3FN 
S_Float8E4M3FNUZ 
S_Float8E4M3B11FNUZ 
S_Float8E3M4 
S_FloatTF32 
S_Float8E8M0FNU 
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 331 of file APFloat.h.

Member Function Documentation

◆ BFloat()

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

Definition at line 264 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 291 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

Definition at line 171 of file APFloat.cpp.

References BFloat(), Float4E2M1FN(), Float6E2M3FN(), Float6E3M2FN(), Float8E3M4(), Float8E4M3(), Float8E4M3B11FNUZ(), Float8E4M3FN(), Float8E4M3FNUZ(), Float8E5M2(), Float8E5M2FNUZ(), Float8E8M0FNU(), FloatTF32(), IEEEdouble(), IEEEhalf(), IEEEquad(), IEEEsingle(), llvm_unreachable, PPCDoubleDouble(), PPCDoubleDoubleLegacy(), S_BFloat, S_Float4E2M1FN, S_Float6E2M3FN, S_Float6E3M2FN, S_Float8E3M4, S_Float8E4M3, S_Float8E4M3B11FNUZ, S_Float8E4M3FN, S_Float8E4M3FNUZ, S_Float8E5M2, S_Float8E5M2FNUZ, S_Float8E8M0FNU, S_FloatTF32, S_IEEEdouble, S_IEEEhalf, S_IEEEquad, S_IEEEsingle, S_PPCDoubleDouble, S_PPCDoubleDoubleLegacy, S_x87DoubleExtended, and x87DoubleExtended().

◆ Float4E2M1FN()

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

Definition at line 287 of file APFloat.cpp.

References llvm::semFloat4E2M1FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float6E2M3FN()

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

Definition at line 286 of file APFloat.cpp.

References llvm::semFloat6E2M3FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float6E3M2FN()

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

Definition at line 285 of file APFloat.cpp.

References llvm::semFloat6E3M2FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E3M4()

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

Definition at line 282 of file APFloat.cpp.

References llvm::semFloat8E3M4.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3()

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

Definition at line 276 of file APFloat.cpp.

References llvm::semFloat8E4M3.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3B11FNUZ()

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

Definition at line 279 of file APFloat.cpp.

References llvm::semFloat8E4M3B11FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3FN()

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

Definition at line 277 of file APFloat.cpp.

References llvm::semFloat8E4M3FN.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E4M3FNUZ()

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

Definition at line 278 of file APFloat.cpp.

References llvm::semFloat8E4M3FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E5M2()

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

Definition at line 274 of file APFloat.cpp.

References llvm::semFloat8E5M2.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E5M2FNUZ()

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

Definition at line 275 of file APFloat.cpp.

References llvm::semFloat8E5M2FNUZ.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ Float8E8M0FNU()

const fltSemantics & llvm::APFloatBase::Float8E8M0FNU ( )
static

Definition at line 284 of file APFloat.cpp.

References llvm::semFloat8E8M0FNU.

Referenced by EnumToSemantics(), llvm::APFloat::hasSignificand(), and SemanticsToEnum().

◆ FloatTF32()

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

Definition at line 283 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 372 of file APFloat.cpp.

References llvm::fltSemantics::sizeInBits.

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

◆ IEEEdouble()

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

Definition at line 266 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

Definition at line 263 of file APFloat.cpp.

References llvm::semIEEEhalf.

Referenced by convertNvvmIntrinsicToLlvm(), EnumToSemantics(), llvm::SelectionDAG::FoldConstantArithmetic(), getConstantVector(), llvm::ConstantDataSequential::getElementAsAPFloat(), llvm::MVT::getFltSemantics(), llvm::RISCVLoadFPImm::getLoadFPImm(), llvm::GCNTTIImpl::instCombineIntrinsic(), isFPExtFromF16OrConst(), isInv2Pi(), llvm::ConstantFP::isValueValidForType(), matchFPExtFromF16(), llvm::NVPTXFloatMCExpr::printImpl(), llvm::APFixedPoint::promoteFloatSemantics(), SemanticsToEnum(), shrinkFPConstant(), strictFPExtFromF16(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

◆ IEEEquad()

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

Definition at line 267 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 265 of file APFloat.cpp.

References llvm::semIEEEsingle.

Referenced by llvm::checkConvertToNonDenormSingle(), convertNvvmIntrinsicToLlvm(), llvm::convertToNonDenormSingle(), EnumToSemantics(), llvm::SelectionDAG::FoldConstantArithmetic(), llvm::generateReadImageInst(), getConstantVector(), getConstVector(), 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(), 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 358 of file APFloat.cpp.

Referenced by computeKnownFPClass().

◆ PPCDoubleDouble()

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

Definition at line 268 of file APFloat.cpp.

References llvm::semPPCDoubleDouble.

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

◆ PPCDoubleDoubleLegacy()

const fltSemantics & llvm::APFloatBase::PPCDoubleDoubleLegacy ( )
static

Definition at line 271 of file APFloat.cpp.

References llvm::semPPCDoubleDoubleLegacy.

Referenced by EnumToSemantics(), and SemanticsToEnum().

◆ semanticsHasInf()

bool llvm::APFloatBase::semanticsHasInf ( const fltSemantics &  semantics)
static

Definition at line 350 of file APFloat.cpp.

References llvm::IEEE754, and llvm::fltSemantics::nonFiniteBehavior.

◆ semanticsHasNaN()

bool llvm::APFloatBase::semanticsHasNaN ( const fltSemantics &  semantics)
static

Definition at line 354 of file APFloat.cpp.

References llvm::FiniteOnly, and llvm::fltSemantics::nonFiniteBehavior.

◆ semanticsHasSignedRepr()

bool llvm::APFloatBase::semanticsHasSignedRepr ( const fltSemantics &  semantics)
static

Definition at line 346 of file APFloat.cpp.

References llvm::fltSemantics::hasSignedRepr.

◆ semanticsHasZero()

bool llvm::APFloatBase::semanticsHasZero ( const fltSemantics &  semantics)
static

Definition at line 342 of file APFloat.cpp.

References llvm::fltSemantics::hasZero.

◆ semanticsIntSizeInBits()

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

Definition at line 331 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 321 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 325 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 317 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 328 of file APFloat.cpp.

References llvm::fltSemantics::sizeInBits.

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

◆ SemanticsToEnum()

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

Definition at line 218 of file APFloat.cpp.

References BFloat(), Float4E2M1FN(), Float6E2M3FN(), Float6E3M2FN(), Float8E3M4(), Float8E4M3(), Float8E4M3B11FNUZ(), Float8E4M3FN(), Float8E4M3FNUZ(), Float8E5M2(), Float8E5M2FNUZ(), Float8E8M0FNU(), FloatTF32(), IEEEdouble(), IEEEhalf(), IEEEquad(), IEEEsingle(), llvm_unreachable, PPCDoubleDouble(), PPCDoubleDoubleLegacy(), S_BFloat, S_Float4E2M1FN, S_Float6E2M3FN, S_Float6E3M2FN, S_Float8E3M4, S_Float8E4M3, S_Float8E4M3B11FNUZ, S_Float8E4M3FN, S_Float8E4M3FNUZ, S_Float8E5M2, S_Float8E5M2FNUZ, S_Float8E8M0FNU, S_FloatTF32, S_IEEEdouble, S_IEEEhalf, S_IEEEquad, S_IEEEsingle, S_PPCDoubleDouble, S_PPCDoubleDoubleLegacy, S_x87DoubleExtended, and x87DoubleExtended().

Referenced by llvm::SIInstrInfo::isInlineConstant().

◆ x87DoubleExtended()

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

Definition at line 288 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::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 302 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 297 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::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::APFloat::operator*(), llvm::APFloat::operator+(), llvm::APFloat::operator-(), llvm::APFloat::operator/(), llvm::AMDGPUTargetLowering::PerformDAGCombine(), llvm::NVPTXFloatMCExpr::printImpl(), strictFPExtFromF16(), toString(), valueHasFloatPrecision(), llvm::InstCombinerImpl::visitFCmpInst(), WriteAPFloatInternal(), and llvm::X86TargetLowering::X86TargetLowering().

◆ rmTowardNegative

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

Definition at line 300 of file APFloat.h.

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

◆ rmTowardPositive

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

Definition at line 299 of file APFloat.h.

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

◆ rmTowardZero

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

Definition at line 301 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::LegalizerHelper::lowerFPTOINT_SAT(), llvm::ARMAsmPrinter::lowerOperand(), and PerformVMulVCTPCombine().

The documentation for this struct was generated from the following files:
Generated on Sat Dec 21 2024 06:51:02 for LLVM by doxygen 1.9.6