LLVM
15.0.0git
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#include "llvm/ADT/APFloat.h"
Public Member Functions | |
bool | needsCleanup () const |
Returns whether this instance allocated memory. More... | |
bool | operator== (const IEEEFloat &) const =delete |
The definition of equality is not straightforward for floating point, so we won't use operator==. More... | |
cmpResult | compare (const IEEEFloat &) const |
IEEE comparison with another floating point number (NaNs compare unordered, 0==-0). More... | |
bool | bitwiseIsEqual (const IEEEFloat &) const |
Bitwise comparison for equality (QNaNs compare equal, 0!=-0). More... | |
unsigned int | convertToHexString (char *dst, unsigned int hexDigits, bool upperCase, roundingMode) const |
Write out a hexadecimal representation of the floating point value to DST, which must be of sufficient size, in the C99 form [-]0xh.hhhhp[+-]d. More... | |
IEEEFloat & | operator= (const IEEEFloat &) |
IEEEFloat & | operator= (IEEEFloat &&) |
void | toString (SmallVectorImpl< char > &Str, unsigned FormatPrecision=0, unsigned FormatMaxPadding=3, bool TruncateZero=true) const |
Converts this value into a decimal string. More... | |
bool | getExactInverse (APFloat *inv) const |
If this value has an exact multiplicative inverse, store it in inv and return true. More... | |
cmpResult | compareAbsoluteValue (const IEEEFloat &) const |
Constructors | |
IEEEFloat (const fltSemantics &) | |
IEEEFloat (const fltSemantics &, integerPart) | |
IEEEFloat (const fltSemantics &, uninitializedTag) | |
IEEEFloat (const fltSemantics &, const APInt &) | |
IEEEFloat (double d) | |
IEEEFloat (float f) | |
IEEEFloat (const IEEEFloat &) | |
IEEEFloat (IEEEFloat &&) | |
~IEEEFloat () | |
Arithmetic | |
opStatus | add (const IEEEFloat &, roundingMode) |
opStatus | subtract (const IEEEFloat &, roundingMode) |
opStatus | multiply (const IEEEFloat &, roundingMode) |
opStatus | divide (const IEEEFloat &, roundingMode) |
opStatus | remainder (const IEEEFloat &) |
IEEE remainder. More... | |
opStatus | mod (const IEEEFloat &) |
C fmod, or llvm frem. More... | |
opStatus | fusedMultiplyAdd (const IEEEFloat &, const IEEEFloat &, roundingMode) |
opStatus | roundToIntegral (roundingMode) |
opStatus | next (bool nextDown) |
IEEE-754R 5.3.1: nextUp/nextDown. More... | |
Sign operations. | |
void | changeSign () |
Conversions | |
opStatus | convert (const fltSemantics &, roundingMode, bool *) |
IEEEFloat::convert - convert a value of one floating point type to another. More... | |
opStatus | convertToInteger (MutableArrayRef< 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) |
Expected< opStatus > | convertFromString (StringRef, roundingMode) |
APInt | bitcastToAPInt () const |
double | convertToDouble () const |
float | convertToFloat () const |
IEEE-754R 5.7.2 General operations. | |
bool | isNegative () const |
IEEE-754R isSignMinus: Returns true if and only if the current value is negative. More... | |
bool | isNormal () const |
IEEE-754R isNormal: Returns true if and only if the current value is normal. More... | |
bool | isFinite () const |
Returns true if and only if the current value is zero, subnormal, or normal. More... | |
bool | isZero () const |
Returns true if and only if the float is plus or minus zero. More... | |
bool | isDenormal () const |
IEEE-754R isSubnormal(): Returns true if and only if the float is a denormal. More... | |
bool | isInfinity () const |
IEEE-754R isInfinite(): Returns true if and only if the float is infinity. More... | |
bool | isNaN () const |
Returns true if and only if the float is a quiet or signaling NaN. More... | |
bool | isSignaling () const |
Returns true if and only if the float is a signaling NaN. More... | |
Special value setters. | |
void | makeLargest (bool Neg=false) |
Make this number the largest magnitude normal number in the given semantics. More... | |
void | makeSmallest (bool Neg=false) |
Make this number the smallest magnitude denormal number in the given semantics. More... | |
void | makeNaN (bool SNaN=false, bool Neg=false, const APInt *fill=nullptr) |
void | makeInf (bool Neg=false) |
void | makeZero (bool Neg=false) |
void | makeQuiet () |
void | makeSmallestNormalized (bool Negative=false) |
Returns the smallest (by magnitude) normalized finite number in the given semantics. More... | |
Friends | |
hash_code | hash_value (const IEEEFloat &Arg) |
Overload to compute a hash code for an APFloat value. More... | |
int | ilogb (const IEEEFloat &Arg) |
Returns the exponent of the internal representation of the APFloat. More... | |
IEEEFloat | scalbn (IEEEFloat X, int Exp, roundingMode) |
Returns: X * 2^Exp for integral exponents. More... | |
IEEEFloat | frexp (const IEEEFloat &X, int &Exp, roundingMode) |
Simple Queries | |
fltCategory | getCategory () const |
const fltSemantics & | getSemantics () const |
bool | isNonZero () const |
bool | isFiniteNonZero () const |
bool | isPosZero () const |
bool | isNegZero () const |
bool | isSmallest () const |
Returns true if and only if the number has the smallest possible non-zero magnitude in the current semantics. More... | |
bool | isLargest () const |
Returns true if and only if the number has the largest possible finite magnitude in the current semantics. More... | |
bool | isInteger () const |
Returns true if and only if the number is an exact integer. More... | |
llvm::detail::IEEEFloat::IEEEFloat | ( | const fltSemantics & | ourSemantics | ) |
Definition at line 935 of file APFloat.cpp.
References makeZero().
llvm::detail::IEEEFloat::IEEEFloat | ( | const fltSemantics & | ourSemantics, |
integerPart | value | ||
) |
Definition at line 925 of file APFloat.cpp.
References llvm::APFloatBase::fcNormal, llvm::lfExactlyZero, llvm::fltSemantics::precision, and llvm::APFloatBase::rmNearestTiesToEven.
llvm::detail::IEEEFloat::IEEEFloat | ( | const fltSemantics & | ourSemantics, |
uninitializedTag | tag | ||
) |
Definition at line 942 of file APFloat.cpp.
llvm::detail::IEEEFloat::IEEEFloat | ( | const fltSemantics & | Sem, |
const APInt & | API | ||
) |
Definition at line 3682 of file APFloat.cpp.
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explicit |
Definition at line 3690 of file APFloat.cpp.
References d, llvm::APInt::doubleToBits(), and llvm::semIEEEdouble.
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explicit |
Definition at line 3686 of file APFloat.cpp.
References f(), llvm::APInt::floatToBits(), and llvm::semIEEEsingle.
Definition at line 945 of file APFloat.cpp.
llvm::detail::IEEEFloat::IEEEFloat | ( | IEEEFloat && | rhs | ) |
Definition at line 950 of file APFloat.cpp.
References move.
llvm::detail::IEEEFloat::~IEEEFloat | ( | ) |
Definition at line 954 of file APFloat.cpp.
IEEEFloat::opStatus llvm::detail::IEEEFloat::add | ( | const IEEEFloat & | rhs, |
roundingMode | rounding_mode | ||
) |
Definition at line 1806 of file APFloat.cpp.
Referenced by remainder(), and roundToIntegral().
APInt llvm::detail::IEEEFloat::bitcastToAPInt | ( | ) | const |
Definition at line 3360 of file APFloat.cpp.
References assert(), llvm::semBFloat, llvm::semIEEEdouble, llvm::semIEEEhalf, llvm::semIEEEquad, llvm::semIEEEsingle, llvm::semPPCDoubleDoubleLegacy, and llvm::semX87DoubleExtended.
Referenced by convertToDouble(), and convertToFloat().
Bitwise comparison for equality (QNaNs compare equal, 0!=-0).
Definition at line 908 of file APFloat.cpp.
References llvm::lltok::equal, llvm::APFloatBase::fcInfinity, llvm::APFloatBase::fcZero, and isFiniteNonZero().
void llvm::detail::IEEEFloat::changeSign | ( | ) |
Definition at line 1770 of file APFloat.cpp.
Referenced by next(), and roundToIntegral().
IEEEFloat::cmpResult llvm::detail::IEEEFloat::compare | ( | const IEEEFloat & | rhs | ) | const |
IEEE comparison with another floating point number (NaNs compare unordered, 0==-0).
Definition at line 2110 of file APFloat.cpp.
References assert(), llvm::APFloatBase::cmpEqual, llvm::APFloatBase::cmpGreaterThan, llvm::APFloatBase::cmpLessThan, llvm::APFloatBase::cmpUnordered, compareAbsoluteValue(), llvm::APFloatBase::fcInfinity, llvm::APFloatBase::fcNaN, llvm::APFloatBase::fcNormal, llvm::APFloatBase::fcZero, llvm_unreachable, PackCategoriesIntoKey, and result.
Referenced by compareAbsoluteValue(), isInteger(), and remainder().
IEEEFloat::cmpResult llvm::detail::IEEEFloat::compareAbsoluteValue | ( | const IEEEFloat & | rhs | ) | const |
Definition at line 1268 of file APFloat.cpp.
References assert(), llvm::APFloatBase::cmpEqual, llvm::APFloatBase::cmpGreaterThan, llvm::APFloatBase::cmpLessThan, compare(), isFiniteNonZero(), and llvm::APInt::tcCompare().
IEEEFloat::opStatus llvm::detail::IEEEFloat::convert | ( | const fltSemantics & | toSemantics, |
roundingMode | rounding_mode, | ||
bool * | losesInfo | ||
) |
IEEEFloat::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 2187 of file APFloat.cpp.
References llvm::APFloatBase::fcNaN, isFiniteNonZero(), isSignaling(), llvm::lfExactlyZero, makeQuiet(), llvm::fltSemantics::minExponent, llvm::APFloatBase::opInvalidOp, llvm::APFloatBase::opOK, llvm::partCountForBits(), llvm::fltSemantics::precision, llvm::semX87DoubleExtended, shift, llvm::shiftRight(), llvm::APInt::tcAssign(), llvm::APInt::tcSet(), llvm::APInt::tcSetBit(), and llvm::APInt::tcShiftLeft().
Referenced by llvm::APFloat::convert(), and remainder().
IEEEFloat::opStatus llvm::detail::IEEEFloat::convertFromAPInt | ( | const APInt & | Val, |
bool | isSigned, | ||
roundingMode | rounding_mode | ||
) |
Definition at line 2478 of file APFloat.cpp.
References llvm::APInt::getNumWords(), llvm::APInt::getRawData(), and llvm::APInt::isNegative().
Referenced by roundToIntegral().
IEEEFloat::opStatus llvm::detail::IEEEFloat::convertFromSignExtendedInteger | ( | const integerPart * | src, |
unsigned int | srcCount, | ||
bool | isSigned, | ||
roundingMode | rounding_mode | ||
) |
Definition at line 2496 of file APFloat.cpp.
References llvm::copy(), llvm::APFloatBase::integerPartWidth, llvm::sys::fs::status(), llvm::APInt::tcAssign(), llvm::APInt::tcExtractBit(), and llvm::APInt::tcNegate().
Expected< IEEEFloat::opStatus > llvm::detail::IEEEFloat::convertFromString | ( | StringRef | str, |
roundingMode | rounding_mode | ||
) |
Definition at line 2908 of file APFloat.cpp.
References llvm::StringRef::begin(), llvm::createError(), llvm::StringRef::empty(), llvm::APFloatBase::opOK, p, and llvm::StringRef::size().
IEEEFloat::opStatus llvm::detail::IEEEFloat::convertFromZeroExtendedInteger | ( | const integerPart * | parts, |
unsigned int | width, | ||
bool | isSigned, | ||
roundingMode | rounding_mode | ||
) |
Definition at line 2522 of file APFloat.cpp.
References llvm::APInt::getRawData(), llvm::makeArrayRef(), llvm::partCountForBits(), and llvm::APInt::tcExtractBit().
double llvm::detail::IEEEFloat::convertToDouble | ( | ) | const |
Definition at line 3391 of file APFloat.cpp.
References assert(), bitcastToAPInt(), llvm::APInt::bitsToDouble(), and llvm::semIEEEdouble.
Referenced by llvm::APFloat::convertToDouble().
float llvm::detail::IEEEFloat::convertToFloat | ( | ) | const |
Definition at line 3384 of file APFloat.cpp.
References assert(), bitcastToAPInt(), llvm::APInt::bitsToFloat(), and llvm::semIEEEsingle.
Referenced by llvm::APFloat::convertToFloat().
unsigned int llvm::detail::IEEEFloat::convertToHexString | ( | char * | dst, |
unsigned int | hexDigits, | ||
bool | upperCase, | ||
roundingMode | rounding_mode | ||
) | const |
Write out a hexadecimal representation of the floating point value to DST, which must be of sufficient size, in the C99 form [-]0xh.hhhhp[+-]d.
Return the number of characters written, excluding the terminating NUL.
Definition at line 2961 of file APFloat.cpp.
References llvm::APFloatBase::fcInfinity, llvm::APFloatBase::fcNaN, llvm::APFloatBase::fcNormal, llvm::APFloatBase::fcZero, llvm::infinityL, llvm::infinityU, memcpy(), llvm::NaNL, llvm::NaNU, and p.
IEEEFloat::opStatus llvm::detail::IEEEFloat::convertToInteger | ( | MutableArrayRef< integerPart > | parts, |
unsigned int | width, | ||
bool | isSigned, | ||
roundingMode | rounding_mode, | ||
bool * | isExact | ||
) | const |
Definition at line 2418 of file APFloat.cpp.
References assert(), bits, llvm::MutableArrayRef< T >::data(), llvm::APFloatBase::fcNaN, llvm::APFloatBase::opInvalidOp, llvm::partCountForBits(), llvm::ArrayRef< T >::size(), llvm::detail::tcSetLeastSignificantBits(), and llvm::APInt::tcShiftLeft().
IEEEFloat::opStatus llvm::detail::IEEEFloat::divide | ( | const IEEEFloat & | rhs, |
roundingMode | rounding_mode | ||
) |
Definition at line 1836 of file APFloat.cpp.
References isFiniteNonZero(), llvm::lfExactlyZero, and llvm::APFloatBase::opInexact.
Referenced by getExactInverse().
IEEEFloat::opStatus llvm::detail::IEEEFloat::fusedMultiplyAdd | ( | const IEEEFloat & | multiplicand, |
const IEEEFloat & | addend, | ||
roundingMode | rounding_mode | ||
) |
Definition at line 1980 of file APFloat.cpp.
References llvm::APFloatBase::fcZero, isFinite(), isFiniteNonZero(), llvm::lfExactlyZero, llvm::APFloatBase::opInexact, llvm::APFloatBase::opOK, llvm::APFloatBase::opUnderflow, and llvm::APFloatBase::rmTowardNegative.
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inline |
Definition at line 375 of file APFloat.h.
Referenced by llvm::APFloat::getCategory().
bool llvm::detail::IEEEFloat::getExactInverse | ( | APFloat * | inv | ) | const |
If this value has an exact multiplicative inverse, store it in inv and return true.
Definition at line 3994 of file APFloat.cpp.
References llvm::lltok::APFloat, assert(), divide(), isDenormal(), isFiniteNonZero(), llvm::APFloatBase::opOK, llvm::fltSemantics::precision, and llvm::APFloatBase::rmNearestTiesToEven.
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bool llvm::detail::IEEEFloat::isDenormal | ( | ) | const |
IEEE-754R isSubnormal(): Returns true if and only if the float is a denormal.
Definition at line 834 of file APFloat.cpp.
References isFiniteNonZero(), llvm::fltSemantics::minExponent, llvm::fltSemantics::precision, and llvm::APInt::tcExtractBit().
Referenced by getExactInverse(), isNormal(), and next().
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inline |
Returns true if and only if the current value is zero, subnormal, or normal.
This means that the value is not infinite or NaN.
Definition at line 352 of file APFloat.h.
References isInfinity(), and isNaN().
Referenced by fusedMultiplyAdd(), isFiniteNonZero(), and isInteger().
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inline |
Definition at line 378 of file APFloat.h.
References isFinite(), and isZero().
Referenced by bitwiseIsEqual(), compareAbsoluteValue(), convert(), divide(), fusedMultiplyAdd(), getExactInverse(), isDenormal(), isLargest(), isNormal(), isSmallest(), mod(), and multiply().
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IEEE-754R isInfinite(): Returns true if and only if the float is infinity.
Definition at line 362 of file APFloat.h.
References llvm::APFloatBase::fcInfinity.
Referenced by isFinite(), and roundToIntegral().
bool llvm::detail::IEEEFloat::isInteger | ( | ) | const |
Returns true if and only if the number is an exact integer.
Definition at line 900 of file APFloat.cpp.
References llvm::APFloatBase::cmpEqual, compare(), isFinite(), and llvm::APFloatBase::rmTowardZero.
bool llvm::detail::IEEEFloat::isLargest | ( | ) | const |
Returns true if and only if the number has the largest possible finite magnitude in the current semantics.
Definition at line 893 of file APFloat.cpp.
References isFiniteNonZero(), and llvm::fltSemantics::maxExponent.
Referenced by next().
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inline |
Returns true if and only if the float is a quiet or signaling NaN.
Definition at line 365 of file APFloat.h.
References llvm::APFloatBase::fcNaN.
Referenced by isFinite(), isSignaling(), makeQuiet(), and roundToIntegral().
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inline |
IEEE-754R isSignMinus: Returns true if and only if the current value is negative.
This applies to zeros and NaNs as well.
Definition at line 340 of file APFloat.h.
Referenced by llvm::APFloat::isNegative(), isNegZero(), isPosZero(), next(), roundToIntegral(), and toString().
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Definition at line 380 of file APFloat.h.
References isNegative(), and isZero().
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Definition at line 377 of file APFloat.h.
References llvm::APFloatBase::fcZero.
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IEEE-754R isNormal: Returns true if and only if the current value is normal.
This implies that the current value of the float is not zero, subnormal, infinite, or NaN following the definition of normality from IEEE-754R.
Definition at line 346 of file APFloat.h.
References isDenormal(), and isFiniteNonZero().
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Definition at line 379 of file APFloat.h.
References isNegative(), and isZero().
bool llvm::detail::IEEEFloat::isSignaling | ( | ) | const |
Returns true if and only if the float is a signaling NaN.
Definition at line 4023 of file APFloat.cpp.
References isNaN(), llvm::fltSemantics::precision, and llvm::APInt::tcExtractBit().
Referenced by convert(), llvm::APFloat::isSignaling(), next(), and roundToIntegral().
bool llvm::detail::IEEEFloat::isSmallest | ( | ) | const |
Returns true if and only if the number has the smallest possible non-zero magnitude in the current semantics.
Definition at line 840 of file APFloat.cpp.
References isFiniteNonZero(), and llvm::fltSemantics::minExponent.
Referenced by next().
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Returns true if and only if the float is plus or minus zero.
Definition at line 355 of file APFloat.h.
References llvm::APFloatBase::fcZero.
Referenced by isFiniteNonZero(), isNegZero(), isPosZero(), mod(), remainder(), and roundToIntegral().
void llvm::detail::IEEEFloat::makeInf | ( | bool | Neg = false | ) |
Definition at line 4164 of file APFloat.cpp.
References llvm::APFloatBase::fcInfinity, and llvm::APInt::tcSet().
void llvm::detail::IEEEFloat::makeLargest | ( | bool | Neg = false | ) |
Make this number the largest magnitude normal number in the given semantics.
Definition at line 3632 of file APFloat.cpp.
References llvm::APFloatBase::fcNormal, llvm::APFloatBase::integerPartWidth, llvm::fltSemantics::maxExponent, and llvm::fltSemantics::precision.
Referenced by next().
void llvm::detail::IEEEFloat::makeNaN | ( | bool | SNaN = false , |
bool | Neg = false , |
||
const APInt * | fill = nullptr |
||
) |
Definition at line 762 of file APFloat.cpp.
References llvm::APFloatBase::fcNaN, llvm::APInt::getNumWords(), llvm::APInt::getRawData(), llvm::min(), llvm::fltSemantics::precision, llvm::semX87DoubleExtended, llvm::APInt::tcAssign(), llvm::APInt::tcClearBit(), llvm::APInt::tcIsZero(), llvm::APInt::tcSet(), and llvm::APInt::tcSetBit().
Referenced by next().
void llvm::detail::IEEEFloat::makeQuiet | ( | ) |
Definition at line 4178 of file APFloat.cpp.
References assert(), isNaN(), llvm::fltSemantics::precision, and llvm::APInt::tcSetBit().
Referenced by convert(), llvm::detail::frexp(), and roundToIntegral().
void llvm::detail::IEEEFloat::makeSmallest | ( | bool | Neg = false | ) |
Make this number the smallest magnitude denormal number in the given semantics.
Definition at line 3657 of file APFloat.cpp.
References llvm::APFloatBase::fcNormal, llvm::fltSemantics::minExponent, and llvm::APInt::tcSet().
Referenced by next().
void llvm::detail::IEEEFloat::makeSmallestNormalized | ( | bool | Negative = false | ) |
Returns the smallest (by magnitude) normalized finite number in the given semantics.
Negative | - True iff the number should be negative |
Definition at line 3668 of file APFloat.cpp.
References llvm::APFloatBase::fcNormal, llvm::APFloatBase::integerPartWidth, llvm::fltSemantics::minExponent, llvm::partCountForBits(), and llvm::fltSemantics::precision.
void llvm::detail::IEEEFloat::makeZero | ( | bool | Neg = false | ) |
Definition at line 4171 of file APFloat.cpp.
References llvm::APFloatBase::fcZero, and llvm::APInt::tcSet().
Referenced by IEEEFloat().
IEEEFloat::opStatus llvm::detail::IEEEFloat::mod | ( | const IEEEFloat & | rhs | ) |
C fmod, or llvm frem.
Definition at line 1959 of file APFloat.cpp.
References assert(), llvm::APFloatBase::cmpLessThan, compareAbsoluteValue(), ilogb, isFiniteNonZero(), isZero(), llvm::APFloatBase::opOK, llvm::APFloatBase::rmNearestTiesToEven, scalbn, and subtract().
Referenced by remainder().
IEEEFloat::opStatus llvm::detail::IEEEFloat::multiply | ( | const IEEEFloat & | rhs, |
roundingMode | rounding_mode | ||
) |
Definition at line 1818 of file APFloat.cpp.
References isFiniteNonZero(), llvm::lfExactlyZero, and llvm::APFloatBase::opInexact.
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IEEEFloat::opStatus llvm::detail::IEEEFloat::next | ( | bool | nextDown | ) |
IEEE-754R 5.3.1: nextUp/nextDown.
IEEE-754R 2008 5.3.1: nextUp/nextDown.
NOTE since nextDown(x) = -nextUp(-x), we only implement nextUp with appropriate sign switching before/after the computation.
Definition at line 4036 of file APFloat.cpp.
References assert(), changeSign(), llvm::APFloatBase::fcInfinity, llvm::APFloatBase::fcNaN, llvm::APFloatBase::fcNormal, llvm::APFloatBase::fcZero, isDenormal(), isLargest(), isNegative(), isSignaling(), isSmallest(), makeLargest(), makeNaN(), makeSmallest(), llvm::fltSemantics::maxExponent, llvm::fltSemantics::minExponent, llvm::APFloatBase::opInvalidOp, llvm::APFloatBase::opOK, llvm::fltSemantics::precision, result, llvm::APInt::tcDecrement(), llvm::APInt::tcSet(), and llvm::APInt::tcSetBit().
Definition at line 809 of file APFloat.cpp.
Definition at line 821 of file APFloat.cpp.
References llvm::semBogus.
The definition of equality is not straightforward for floating point, so we won't use operator==.
Use one of the following, or write whatever it is you really mean.
IEEEFloat::opStatus llvm::detail::IEEEFloat::remainder | ( | const IEEEFloat & | rhs | ) |
IEEE remainder.
Definition at line 1854 of file APFloat.cpp.
References add(), assert(), llvm::APFloatBase::cmpEqual, llvm::APFloatBase::cmpGreaterThan, compare(), convert(), isZero(), llvm::fltSemantics::maxExponent, llvm::fltSemantics::minExponent, mod(), llvm::APFloatBase::opDivByZero, llvm::APFloatBase::opOK, P, P2, llvm::fltSemantics::precision, result, llvm::APFloatBase::rmNearestTiesToEven, and subtract().
IEEEFloat::opStatus llvm::detail::IEEEFloat::roundToIntegral | ( | roundingMode | rounding_mode | ) |
Definition at line 2023 of file APFloat.cpp.
References add(), assert(), changeSign(), convertFromAPInt(), isInfinity(), isNaN(), isNegative(), isSignaling(), isZero(), makeQuiet(), llvm::NextPowerOf2(), llvm::APFloatBase::opInvalidOp, llvm::APFloatBase::opOK, llvm::APFloatBase::rmNearestTiesToEven, llvm::APFloatBase::semanticsPrecision(), and subtract().
IEEEFloat::opStatus llvm::detail::IEEEFloat::subtract | ( | const IEEEFloat & | rhs, |
roundingMode | rounding_mode | ||
) |
Definition at line 1812 of file APFloat.cpp.
Referenced by mod(), remainder(), and roundToIntegral().
void llvm::detail::IEEEFloat::toString | ( | SmallVectorImpl< char > & | Str, |
unsigned | FormatPrecision = 0 , |
||
unsigned | FormatMaxPadding = 3 , |
||
bool | TruncateZero = true |
||
) | const |
Converts this value into a decimal string.
FormatPrecision | The maximum number of digits of precision to output. If there are fewer digits available, zero padding will not be used unless the value is integral and small enough to be expressed in FormatPrecision digits. 0 means to use the natural precision of the number. |
FormatMaxPadding | The maximum number of zeros to consider inserting before falling back to scientific notation. 0 means to always use scientific notation. |
TruncateZero | Indicate whether to remove the trailing zero in fraction part or not. Also setting this parameter to false forcing producing of output more similar to default printf behavior. Specifically the lower e is used as exponent delimiter and exponent always contains no less than two digits. |
Number Precision MaxPadding Result
1.01E+4 5 2 10100 1.01E+4 4 2 1.01E+4 1.01E+4 5 1 1.01E+4 1.01E-2 5 2 0.0101 1.01E-2 4 2 0.0101 1.01E-2 4 1 1.01E-2
Definition at line 3778 of file APFloat.cpp.
References llvm::sys::path::append(), assert(), llvm::APInt::countTrailingZeros(), d, E, llvm::APFloatBase::fcInfinity, llvm::APFloatBase::fcNaN, llvm::APFloatBase::fcNormal, llvm::APFloatBase::fcZero, llvm::APInt::getBitWidth(), llvm::APInt::getZExtValue(), I, int, isNegative(), llvm::APInt::lshrInPlace(), llvm::makeArrayRef(), llvm::partCountForBits(), llvm::fltSemantics::precision, llvm::APInt::udivrem(), and llvm::APInt::zext().
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Overload to compute a hash code for an APFloat value.
Note that the use of hash codes for floating point values is in general frought with peril. Equality is hard to define for these values. For example, should negative and positive zero hash to different codes? Are they equal or not? This hash value implementation specifically emphasizes producing different codes for different inputs in order to be used in canonicalization and memoization. As such, equality is bitwiseIsEqual, and 0 != -0.
Definition at line 3110 of file APFloat.cpp.
Returns the exponent of the internal representation of the APFloat.
Because the radix of APFloat is 2, this is equivalent to floor(log2(x)). For special APFloat values, this returns special error codes:
NaN -> IEK_NaN
0 -> IEK_Zero
Inf -> IEK_Inf
Definition at line 4183 of file APFloat.cpp.
Referenced by mod().
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Returns: X * 2^Exp for integral exponents.
Referenced by mod().