APFloat.cpp File Reference

#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <cstring>
#include <limits.h>

Include dependency graph for APFloat.cpp:

Go to the source code of this file.

Classes
struct	llvm::fltSemantics
struct	decimalInfo
Namespaces
namespace	llvm
	List of target independent CodeGen pass IDs.
Defines
#define	PackCategoriesIntoKey(_lhs, _rhs)   ((_lhs) * 4 + (_rhs))
#define	COMPILE_TIME_ASSERT(cond)   extern int CTAssert[(cond) ? 1 : -1]
Functions
	COMPILE_TIME_ASSERT (integerPartWidth%4==0)
static unsigned int	partCountForBits (unsigned int bits)
static unsigned int	decDigitValue (unsigned int c)
static int	readExponent (StringRef::iterator begin, StringRef::iterator end)
static int	totalExponent (StringRef::iterator p, StringRef::iterator end, int exponentAdjustment)
static StringRef::iterator	skipLeadingZeroesAndAnyDot (StringRef::iterator begin, StringRef::iterator end, StringRef::iterator *dot)
static void	interpretDecimal (StringRef::iterator begin, StringRef::iterator end, decimalInfo *D)
static lostFraction	trailingHexadecimalFraction (StringRef::iterator p, StringRef::iterator end, unsigned int digitValue)
static lostFraction	lostFractionThroughTruncation (const integerPart *parts, unsigned int partCount, unsigned int bits)
static lostFraction	shiftRight (integerPart *dst, unsigned int parts, unsigned int bits)
static lostFraction	combineLostFractions (lostFraction moreSignificant, lostFraction lessSignificant)
static unsigned int	HUerrBound (bool inexactMultiply, unsigned int HUerr1, unsigned int HUerr2)
static integerPart	ulpsFromBoundary (const integerPart *parts, unsigned int bits, bool isNearest)
static unsigned int	powerOf5 (integerPart *dst, unsigned int power)
static unsigned int	partAsHex (char *dst, integerPart part, unsigned int count, const char *hexDigitChars)
static char *	writeUnsignedDecimal (char *dst, unsigned int n)
static char *	writeSignedDecimal (char *dst, int value)
Variables
const unsigned int	llvm::maxExponent = 16383
const unsigned int	llvm::maxPrecision = 113
const unsigned int	llvm::maxPowerOfFiveExponent = maxExponent + maxPrecision - 1
const unsigned int	llvm::maxPowerOfFiveParts
static const char	hexDigitsLower [] = "0123456789abcdef0"
static const char	hexDigitsUpper [] = "0123456789ABCDEF0"
static const char	infinityL [] = "infinity"
static const char	infinityU [] = "INFINITY"
static const char	NaNL [] = "nan"
static const char	NaNU [] = "NAN"

---

Define Documentation

#define COMPILE_TIME_ASSERT

(

cond

)

extern int CTAssert[(cond) ? 1 : -1]

Definition at line 38 of file APFloat.cpp.

#define PackCategoriesIntoKey	(		_lhs,
			_rhs
	)		((_lhs) * 4 + (_rhs))

A macro used to combine two fcCategory enums into one key which can be used in a switch statement to classify how the interaction of two APFloat's categories affects an operation.

TODO: If clang source code is ever allowed to use constexpr in its own codebase, change this into a static inline function.

Definition at line 34 of file APFloat.cpp.

Referenced by llvm::APFloat::compare().

---

Function Documentation

static lostFraction combineLostFractions	(	lostFraction	moreSignificant,
		lostFraction	lessSignificant
	)		[static]

Definition at line 376 of file APFloat.cpp.

References llvm::lfExactlyHalf, llvm::lfExactlyZero, llvm::lfLessThanHalf, and llvm::lfMoreThanHalf.

COMPILE_TIME_ASSERT

(

integerPartWidth%

4 = =0

)

static unsigned int decDigitValue

(

unsigned int

c

)

[inline, static]

Definition at line 106 of file APFloat.cpp.

Referenced by interpretDecimal(), readExponent(), and totalExponent().

static unsigned int HUerrBound	(	bool	inexactMultiply,
		unsigned int	HUerr1,
		unsigned int	HUerr2
	)		[static]

Definition at line 397 of file APFloat.cpp.

static void interpretDecimal	(	StringRef::iterator	begin,
		StringRef::iterator	end,
		decimalInfo *	D
	)		[static]

Definition at line 251 of file APFloat.cpp.

References decDigitValue(), llvm::sys::path::end(), decimalInfo::exponent, decimalInfo::firstSigDigit, decimalInfo::lastSigDigit, decimalInfo::normalizedExponent, readExponent(), and skipLeadingZeroesAndAnyDot().

static lostFraction lostFractionThroughTruncation	(	const integerPart *	parts,
		unsigned int	partCount,
		unsigned int	bits
	)		[static]

Definition at line 341 of file APFloat.cpp.

References llvm::integerPartWidth, llvm::lfExactlyHalf, llvm::lfExactlyZero, llvm::lfLessThanHalf, llvm::lfMoreThanHalf, llvm::APInt::tcExtractBit(), and llvm::APInt::tcLSB().

Referenced by shiftRight().

static unsigned int partAsHex	(	char *	dst,
		integerPart	part,
		unsigned int	count,
		const char *	hexDigitChars
	)		[static]

Definition at line 527 of file APFloat.cpp.

References llvm::integerPartWidth.

static unsigned int partCountForBits

(

unsigned int

bits

)

[inline, static]

Definition at line 99 of file APFloat.cpp.

References llvm::integerPartWidth.

Referenced by llvm::APFloat::convert(), llvm::APFloat::convertFromZeroExtendedInteger(), llvm::APFloat::convertToInteger(), llvm::APFloat::getSmallestNormalized(), and llvm::APFloat::toString().

static unsigned int powerOf5	(	integerPart *	dst,
		unsigned int	power
	)		[static]

Definition at line 456 of file APFloat.cpp.

References llvm::maxExponent, llvm::maxPowerOfFiveParts, llvm::APInt::tcAssign(), and llvm::APInt::tcFullMultiply().

static int readExponent	(	StringRef::iterator	begin,
		StringRef::iterator	end
	)		[static]

Definition at line 117 of file APFloat.cpp.

References llvm::sys::path::begin(), decDigitValue(), and llvm::sys::path::end().

Referenced by interpretDecimal().

static lostFraction shiftRight	(	integerPart *	dst,
		unsigned int	parts,
		unsigned int	bits
	)		[static]

Definition at line 363 of file APFloat.cpp.

References lostFractionThroughTruncation(), and llvm::APInt::tcShiftRight().

Referenced by llvm::APFloat::convert().

static StringRef::iterator skipLeadingZeroesAndAnyDot	(	StringRef::iterator	begin,
		StringRef::iterator	end,
		StringRef::iterator *	dot
	)		[static]

Definition at line 210 of file APFloat.cpp.

References llvm::sys::path::begin(), and llvm::sys::path::end().

Referenced by interpretDecimal().

static int totalExponent	(	StringRef::iterator	p,
		StringRef::iterator	end,
		int	exponentAdjustment
	)		[static]

Definition at line 161 of file APFloat.cpp.

References decDigitValue(), and llvm::sys::path::end().

static lostFraction trailingHexadecimalFraction	(	StringRef::iterator	p,
		StringRef::iterator	end,
		unsigned int	digitValue
	)		[static]

Definition at line 310 of file APFloat.cpp.

References llvm::hexDigitValue(), llvm::lfExactlyHalf, llvm::lfExactlyZero, llvm::lfLessThanHalf, and llvm::lfMoreThanHalf.

static integerPart ulpsFromBoundary	(	const integerPart *	parts,
		unsigned int	bits,
		bool	isNearest
	)		[static]

Definition at line 411 of file APFloat.cpp.

References llvm::integerPartWidth.

static char* writeSignedDecimal	(	char *	dst,
		int	value
	)		[static]

Definition at line 563 of file APFloat.cpp.

References writeUnsignedDecimal().

static char* writeUnsignedDecimal	(	char *	dst,
		unsigned int	n
	)		[static]

Definition at line 545 of file APFloat.cpp.

Referenced by writeSignedDecimal().

---

Variable Documentation

const char hexDigitsLower[] = "0123456789abcdef0" [static]

Definition at line 516 of file APFloat.cpp.

const char hexDigitsUpper[] = "0123456789ABCDEF0" [static]

Definition at line 517 of file APFloat.cpp.

const char infinityL[] = "infinity" [static]

Definition at line 518 of file APFloat.cpp.

Referenced by llvm::APFloat::convertToHexString().

const char infinityU[] = "INFINITY" [static]

Definition at line 519 of file APFloat.cpp.

Referenced by llvm::APFloat::convertToHexString().

const char NaNL[] = "nan" [static]

Definition at line 520 of file APFloat.cpp.

Referenced by llvm::APFloat::convertToHexString().

const char NaNU[] = "NAN" [static]

Definition at line 521 of file APFloat.cpp.

Referenced by llvm::APFloat::convertToHexString().