[llvm] r182686 - clang formatted APFloat.h
Michael Gottesman
mgottesman at apple.com
Fri May 24 15:40:38 PDT 2013
Author: mgottesman
Date: Fri May 24 17:40:37 2013
New Revision: 182686
URL: http://llvm.org/viewvc/llvm-project?rev=182686&view=rev
Log:
clang formatted APFloat.h
Modified:
llvm/trunk/include/llvm/ADT/APFloat.h
Modified: llvm/trunk/include/llvm/ADT/APFloat.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/APFloat.h?rev=182686&r1=182685&r2=182686&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/APFloat.h (original)
+++ llvm/trunk/include/llvm/ADT/APFloat.h Fri May 24 17:40:37 2013
@@ -105,362 +105,357 @@
namespace llvm {
- /* Exponents are stored as signed numbers. */
- typedef signed short exponent_t;
+/* Exponents are stored as signed numbers. */
+typedef signed short exponent_t;
- struct fltSemantics;
- class APSInt;
- class StringRef;
-
- /* When bits of a floating point number are truncated, this enum is
- used to indicate what fraction of the LSB those bits represented.
- It essentially combines the roles of guard and sticky bits. */
- enum lostFraction { // Example of truncated bits:
- lfExactlyZero, // 000000
- lfLessThanHalf, // 0xxxxx x's not all zero
- lfExactlyHalf, // 100000
- lfMoreThanHalf // 1xxxxx x's not all zero
+struct fltSemantics;
+class APSInt;
+class StringRef;
+
+/* When bits of a floating point number are truncated, this enum is
+ used to indicate what fraction of the LSB those bits represented.
+ It essentially combines the roles of guard and sticky bits. */
+enum lostFraction { // Example of truncated bits:
+ lfExactlyZero, // 000000
+ lfLessThanHalf, // 0xxxxx x's not all zero
+ lfExactlyHalf, // 100000
+ lfMoreThanHalf // 1xxxxx x's not all zero
+};
+
+class APFloat {
+public:
+
+ /* We support the following floating point semantics. */
+ static const fltSemantics IEEEhalf;
+ static const fltSemantics IEEEsingle;
+ static const fltSemantics IEEEdouble;
+ static const fltSemantics IEEEquad;
+ static const fltSemantics PPCDoubleDouble;
+ static const fltSemantics x87DoubleExtended;
+ /* And this pseudo, used to construct APFloats that cannot
+ conflict with anything real. */
+ static const fltSemantics Bogus;
+
+ static unsigned int semanticsPrecision(const fltSemantics &);
+
+ /* Floating point numbers have a four-state comparison relation. */
+ enum cmpResult {
+ cmpLessThan,
+ cmpEqual,
+ cmpGreaterThan,
+ cmpUnordered
};
- class APFloat {
- public:
+ /* IEEE-754R gives five rounding modes. */
+ enum roundingMode {
+ rmNearestTiesToEven,
+ rmTowardPositive,
+ rmTowardNegative,
+ rmTowardZero,
+ rmNearestTiesToAway
+ };
- /* We support the following floating point semantics. */
- static const fltSemantics IEEEhalf;
- static const fltSemantics IEEEsingle;
- static const fltSemantics IEEEdouble;
- static const fltSemantics IEEEquad;
- static const fltSemantics PPCDoubleDouble;
- static const fltSemantics x87DoubleExtended;
- /* And this pseudo, used to construct APFloats that cannot
- conflict with anything real. */
- static const fltSemantics Bogus;
-
- static unsigned int semanticsPrecision(const fltSemantics &);
-
- /* Floating point numbers have a four-state comparison relation. */
- enum cmpResult {
- cmpLessThan,
- cmpEqual,
- cmpGreaterThan,
- cmpUnordered
- };
-
- /* IEEE-754R gives five rounding modes. */
- enum roundingMode {
- rmNearestTiesToEven,
- rmTowardPositive,
- rmTowardNegative,
- rmTowardZero,
- rmNearestTiesToAway
- };
-
- // Operation status. opUnderflow or opOverflow are always returned
- // or-ed with opInexact.
- enum opStatus {
- opOK = 0x00,
- opInvalidOp = 0x01,
- opDivByZero = 0x02,
- opOverflow = 0x04,
- opUnderflow = 0x08,
- opInexact = 0x10
- };
-
- // Category of internally-represented number.
- enum fltCategory {
- fcInfinity,
- fcNaN,
- fcNormal,
- fcZero
- };
-
- enum uninitializedTag {
- uninitialized
- };
-
- // Constructors.
- APFloat(const fltSemantics &); // Default construct to 0.0
- APFloat(const fltSemantics &, StringRef);
- APFloat(const fltSemantics &, integerPart);
- APFloat(const fltSemantics &, fltCategory, bool negative);
- APFloat(const fltSemantics &, uninitializedTag);
- APFloat(const fltSemantics &, const APInt &);
- explicit APFloat(double d);
- explicit APFloat(float f);
- APFloat(const APFloat &);
- ~APFloat();
-
- // Convenience "constructors"
- static APFloat getZero(const fltSemantics &Sem, bool Negative = false) {
- return APFloat(Sem, fcZero, Negative);
- }
- static APFloat getInf(const fltSemantics &Sem, bool Negative = false) {
- return APFloat(Sem, fcInfinity, Negative);
- }
+ // Operation status. opUnderflow or opOverflow are always returned
+ // or-ed with opInexact.
+ enum opStatus {
+ opOK = 0x00,
+ opInvalidOp = 0x01,
+ opDivByZero = 0x02,
+ opOverflow = 0x04,
+ opUnderflow = 0x08,
+ opInexact = 0x10
+ };
- /// getNaN - Factory for QNaN values.
- ///
- /// \param Negative - True iff the NaN generated should be negative.
- /// \param type - The unspecified fill bits for creating the NaN, 0 by
- /// default. The value is truncated as necessary.
- static APFloat getNaN(const fltSemantics &Sem, bool Negative = false,
- unsigned type = 0) {
- if (type) {
- APInt fill(64, type);
- return getQNaN(Sem, Negative, &fill);
- } else {
- return getQNaN(Sem, Negative, 0);
- }
- }
+ // Category of internally-represented number.
+ enum fltCategory {
+ fcInfinity,
+ fcNaN,
+ fcNormal,
+ fcZero
+ };
- /// getQNan - Factory for QNaN values.
- static APFloat getQNaN(const fltSemantics &Sem,
- bool Negative = false,
- const APInt *payload = 0) {
- return makeNaN(Sem, false, Negative, payload);
- }
+ enum uninitializedTag {
+ uninitialized
+ };
- /// getSNan - Factory for SNaN values.
- static APFloat getSNaN(const fltSemantics &Sem,
- bool Negative = false,
- const APInt *payload = 0) {
- return makeNaN(Sem, true, Negative, payload);
+ // Constructors.
+ APFloat(const fltSemantics &); // Default construct to 0.0
+ APFloat(const fltSemantics &, StringRef);
+ APFloat(const fltSemantics &, integerPart);
+ APFloat(const fltSemantics &, fltCategory, bool negative);
+ APFloat(const fltSemantics &, uninitializedTag);
+ APFloat(const fltSemantics &, const APInt &);
+ explicit APFloat(double d);
+ explicit APFloat(float f);
+ APFloat(const APFloat &);
+ ~APFloat();
+
+ // Convenience "constructors"
+ static APFloat getZero(const fltSemantics &Sem, bool Negative = false) {
+ return APFloat(Sem, fcZero, Negative);
+ }
+ static APFloat getInf(const fltSemantics &Sem, bool Negative = false) {
+ return APFloat(Sem, fcInfinity, Negative);
+ }
+
+ /// getNaN - Factory for QNaN values.
+ ///
+ /// \param Negative - True iff the NaN generated should be negative.
+ /// \param type - The unspecified fill bits for creating the NaN, 0 by
+ /// default. The value is truncated as necessary.
+ static APFloat getNaN(const fltSemantics &Sem, bool Negative = false,
+ unsigned type = 0) {
+ if (type) {
+ APInt fill(64, type);
+ return getQNaN(Sem, Negative, &fill);
+ } else {
+ return getQNaN(Sem, Negative, 0);
}
+ }
- /// getLargest - Returns the largest finite number in the given
- /// semantics.
- ///
- /// \param Negative - True iff the number should be negative
- static APFloat getLargest(const fltSemantics &Sem, bool Negative = false);
-
- /// getSmallest - Returns the smallest (by magnitude) finite number
- /// in the given semantics. Might be denormalized, which implies a
- /// relative loss of precision.
- ///
- /// \param Negative - True iff the number should be negative
- static APFloat getSmallest(const fltSemantics &Sem, bool Negative = false);
-
- /// getSmallestNormalized - Returns the smallest (by magnitude)
- /// normalized finite number in the given semantics.
- ///
- /// \param Negative - True iff the number should be negative
- static APFloat getSmallestNormalized(const fltSemantics &Sem,
- bool Negative = false);
-
- /// getAllOnesValue - Returns a float which is bitcasted from
- /// an all one value int.
- ///
- /// \param BitWidth - Select float type
- /// \param isIEEE - If 128 bit number, select between PPC and IEEE
- static APFloat getAllOnesValue(unsigned BitWidth, bool isIEEE = false);
-
- /// Profile - Used to insert APFloat objects, or objects that contain
- /// APFloat objects, into FoldingSets.
- void Profile(FoldingSetNodeID& NID) const;
-
- /// @brief Used by the Bitcode serializer to emit APInts to Bitcode.
- void Emit(Serializer& S) const;
-
- /// @brief Used by the Bitcode deserializer to deserialize APInts.
- static APFloat ReadVal(Deserializer& D);
-
- /* Arithmetic. */
- opStatus add(const APFloat &, roundingMode);
- opStatus subtract(const APFloat &, roundingMode);
- opStatus multiply(const APFloat &, roundingMode);
- opStatus divide(const APFloat &, roundingMode);
- /* IEEE remainder. */
- opStatus remainder(const APFloat &);
- /* C fmod, or llvm frem. */
- opStatus mod(const APFloat &, roundingMode);
- opStatus fusedMultiplyAdd(const APFloat &, const APFloat &, roundingMode);
- opStatus roundToIntegral(roundingMode);
-
- /* Sign operations. */
- void changeSign();
- void clearSign();
- void copySign(const APFloat &);
-
- /* Conversions. */
- opStatus convert(const fltSemantics &, roundingMode, bool *);
- opStatus convertToInteger(integerPart *, unsigned int, bool,
- roundingMode, bool *) const;
- opStatus convertToInteger(APSInt&, 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(StringRef, roundingMode);
- APInt bitcastToAPInt() const;
- double convertToDouble() const;
- float convertToFloat() const;
-
- /* 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. */
- bool operator==(const APFloat &) const LLVM_DELETED_FUNCTION;
-
- /* IEEE comparison with another floating point number (NaNs
- compare unordered, 0==-0). */
- cmpResult compare(const APFloat &) const;
-
- /* Bitwise comparison for equality (QNaNs compare equal, 0!=-0). */
- bool bitwiseIsEqual(const APFloat &) 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. */
- unsigned int convertToHexString(char *dst, unsigned int hexDigits,
- bool upperCase, roundingMode) const;
-
- /* Simple queries. */
- fltCategory getCategory() const { return category; }
- const fltSemantics &getSemantics() const { return *semantics; }
- bool isZero() const { return category == fcZero; }
- bool isNonZero() const { return category != fcZero; }
- bool isNormal() const { return category == fcNormal; }
- bool isNaN() const { return category == fcNaN; }
- bool isInfinity() const { return category == fcInfinity; }
- bool isNegative() const { return sign; }
- bool isPosZero() const { return isZero() && !isNegative(); }
- bool isNegZero() const { return isZero() && isNegative(); }
- bool isDenormal() const;
-
- APFloat& operator=(const APFloat &);
-
- /// \brief 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.
- friend hash_code hash_value(const APFloat &Arg);
-
- /// Converts this value into a decimal string.
- ///
- /// \param 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.
- /// \param FormatMaxPadding The maximum number of zeros to
- /// consider inserting before falling back to scientific
- /// notation. 0 means to always use scientific notation.
- ///
- /// 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
- void toString(SmallVectorImpl<char> &Str,
- unsigned FormatPrecision = 0,
- unsigned FormatMaxPadding = 3) const;
-
- /// getExactInverse - If this value has an exact multiplicative inverse,
- /// store it in inv and return true.
- bool getExactInverse(APFloat *inv) const;
-
- private:
-
- /* Trivial queries. */
- integerPart *significandParts();
- const integerPart *significandParts() const;
- unsigned int partCount() const;
-
- /* Significand operations. */
- integerPart addSignificand(const APFloat &);
- integerPart subtractSignificand(const APFloat &, integerPart);
- lostFraction addOrSubtractSignificand(const APFloat &, bool subtract);
- lostFraction multiplySignificand(const APFloat &, const APFloat *);
- lostFraction divideSignificand(const APFloat &);
- void incrementSignificand();
- void initialize(const fltSemantics *);
- void shiftSignificandLeft(unsigned int);
- lostFraction shiftSignificandRight(unsigned int);
- unsigned int significandLSB() const;
- unsigned int significandMSB() const;
- void zeroSignificand();
-
- /* Arithmetic on special values. */
- opStatus addOrSubtractSpecials(const APFloat &, bool subtract);
- opStatus divideSpecials(const APFloat &);
- opStatus multiplySpecials(const APFloat &);
- opStatus modSpecials(const APFloat &);
-
- /* Miscellany. */
- static APFloat makeNaN(const fltSemantics &Sem, bool SNaN, bool Negative,
- const APInt *fill);
- void makeNaN(bool SNaN = false, bool Neg = false, const APInt *fill = 0);
- opStatus normalize(roundingMode, lostFraction);
- opStatus addOrSubtract(const APFloat &, roundingMode, bool subtract);
- cmpResult compareAbsoluteValue(const APFloat &) const;
- opStatus handleOverflow(roundingMode);
- bool roundAwayFromZero(roundingMode, lostFraction, unsigned int) const;
- opStatus convertToSignExtendedInteger(integerPart *, unsigned int, bool,
- roundingMode, bool *) const;
- opStatus convertFromUnsignedParts(const integerPart *, unsigned int,
- roundingMode);
- opStatus convertFromHexadecimalString(StringRef, roundingMode);
- opStatus convertFromDecimalString(StringRef, roundingMode);
- char *convertNormalToHexString(char *, unsigned int, bool,
- roundingMode) const;
- opStatus roundSignificandWithExponent(const integerPart *, unsigned int,
- int, roundingMode);
-
- APInt convertHalfAPFloatToAPInt() const;
- APInt convertFloatAPFloatToAPInt() const;
- APInt convertDoubleAPFloatToAPInt() const;
- APInt convertQuadrupleAPFloatToAPInt() const;
- APInt convertF80LongDoubleAPFloatToAPInt() const;
- APInt convertPPCDoubleDoubleAPFloatToAPInt() const;
- void initFromAPInt(const fltSemantics *Sem, const APInt& api);
- void initFromHalfAPInt(const APInt& api);
- void initFromFloatAPInt(const APInt& api);
- void initFromDoubleAPInt(const APInt& api);
- void initFromQuadrupleAPInt(const APInt &api);
- void initFromF80LongDoubleAPInt(const APInt& api);
- void initFromPPCDoubleDoubleAPInt(const APInt& api);
-
- void assign(const APFloat &);
- void copySignificand(const APFloat &);
- void freeSignificand();
-
- /* What kind of semantics does this value obey? */
- const fltSemantics *semantics;
-
- /* Significand - the fraction with an explicit integer bit. Must be
- at least one bit wider than the target precision. */
- union Significand
- {
- integerPart part;
- integerPart *parts;
- } significand;
-
- /* The exponent - a signed number. */
- exponent_t exponent;
-
- /* What kind of floating point number this is. */
- /* Only 2 bits are required, but VisualStudio incorrectly sign extends
- it. Using the extra bit keeps it from failing under VisualStudio */
- fltCategory category: 3;
-
- /* The sign bit of this number. */
- unsigned int sign: 1;
- };
-
- // See friend declaration above. This additional declaration is required in
- // order to compile LLVM with IBM xlC compiler.
- hash_code hash_value(const APFloat &Arg);
+ /// getQNan - Factory for QNaN values.
+ static APFloat getQNaN(const fltSemantics &Sem, bool Negative = false,
+ const APInt *payload = 0) {
+ return makeNaN(Sem, false, Negative, payload);
+ }
+
+ /// getSNan - Factory for SNaN values.
+ static APFloat getSNaN(const fltSemantics &Sem, bool Negative = false,
+ const APInt *payload = 0) {
+ return makeNaN(Sem, true, Negative, payload);
+ }
+
+ /// getLargest - Returns the largest finite number in the given
+ /// semantics.
+ ///
+ /// \param Negative - True iff the number should be negative
+ static APFloat getLargest(const fltSemantics &Sem, bool Negative = false);
+
+ /// getSmallest - Returns the smallest (by magnitude) finite number
+ /// in the given semantics. Might be denormalized, which implies a
+ /// relative loss of precision.
+ ///
+ /// \param Negative - True iff the number should be negative
+ static APFloat getSmallest(const fltSemantics &Sem, bool Negative = false);
+
+ /// getSmallestNormalized - Returns the smallest (by magnitude)
+ /// normalized finite number in the given semantics.
+ ///
+ /// \param Negative - True iff the number should be negative
+ static APFloat getSmallestNormalized(const fltSemantics &Sem,
+ bool Negative = false);
+
+ /// getAllOnesValue - Returns a float which is bitcasted from
+ /// an all one value int.
+ ///
+ /// \param BitWidth - Select float type
+ /// \param isIEEE - If 128 bit number, select between PPC and IEEE
+ static APFloat getAllOnesValue(unsigned BitWidth, bool isIEEE = false);
+
+ /// Profile - Used to insert APFloat objects, or objects that contain
+ /// APFloat objects, into FoldingSets.
+ void Profile(FoldingSetNodeID &NID) const;
+
+ /// @brief Used by the Bitcode serializer to emit APInts to Bitcode.
+ void Emit(Serializer &S) const;
+
+ /// @brief Used by the Bitcode deserializer to deserialize APInts.
+ static APFloat ReadVal(Deserializer &D);
+
+ /* Arithmetic. */
+ opStatus add(const APFloat &, roundingMode);
+ opStatus subtract(const APFloat &, roundingMode);
+ opStatus multiply(const APFloat &, roundingMode);
+ opStatus divide(const APFloat &, roundingMode);
+ /* IEEE remainder. */
+ opStatus remainder(const APFloat &);
+ /* C fmod, or llvm frem. */
+ opStatus mod(const APFloat &, roundingMode);
+ opStatus fusedMultiplyAdd(const APFloat &, const APFloat &, roundingMode);
+ opStatus roundToIntegral(roundingMode);
+
+ /* Sign operations. */
+ void changeSign();
+ void clearSign();
+ void copySign(const APFloat &);
+
+ /* Conversions. */
+ opStatus convert(const fltSemantics &, roundingMode, bool *);
+ opStatus convertToInteger(integerPart *, unsigned int, bool, roundingMode,
+ bool *) const;
+ opStatus convertToInteger(APSInt &, 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(StringRef, roundingMode);
+ APInt bitcastToAPInt() const;
+ double convertToDouble() const;
+ float convertToFloat() const;
+
+ /* 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. */
+ bool operator==(const APFloat &) const LLVM_DELETED_FUNCTION;
+
+ /* IEEE comparison with another floating point number (NaNs
+ compare unordered, 0==-0). */
+ cmpResult compare(const APFloat &) const;
+
+ /* Bitwise comparison for equality (QNaNs compare equal, 0!=-0). */
+ bool bitwiseIsEqual(const APFloat &) 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. */
+ unsigned int convertToHexString(char *dst, unsigned int hexDigits,
+ bool upperCase, roundingMode) const;
+
+ /* Simple queries. */
+ fltCategory getCategory() const { return category; }
+ const fltSemantics &getSemantics() const { return *semantics; }
+ bool isZero() const { return category == fcZero; }
+ bool isNonZero() const { return category != fcZero; }
+ bool isNormal() const { return category == fcNormal; }
+ bool isNaN() const { return category == fcNaN; }
+ bool isInfinity() const { return category == fcInfinity; }
+ bool isNegative() const { return sign; }
+ bool isPosZero() const { return isZero() && !isNegative(); }
+ bool isNegZero() const { return isZero() && isNegative(); }
+ bool isDenormal() const;
+
+ APFloat &operator=(const APFloat &);
+
+ /// \brief 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.
+ friend hash_code hash_value(const APFloat &Arg);
+
+ /// Converts this value into a decimal string.
+ ///
+ /// \param 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.
+ /// \param FormatMaxPadding The maximum number of zeros to
+ /// consider inserting before falling back to scientific
+ /// notation. 0 means to always use scientific notation.
+ ///
+ /// 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
+ void toString(SmallVectorImpl<char> &Str, unsigned FormatPrecision = 0,
+ unsigned FormatMaxPadding = 3) const;
+
+ /// getExactInverse - If this value has an exact multiplicative inverse,
+ /// store it in inv and return true.
+ bool getExactInverse(APFloat *inv) const;
+
+private:
+
+ /* Trivial queries. */
+ integerPart *significandParts();
+ const integerPart *significandParts() const;
+ unsigned int partCount() const;
+
+ /* Significand operations. */
+ integerPart addSignificand(const APFloat &);
+ integerPart subtractSignificand(const APFloat &, integerPart);
+ lostFraction addOrSubtractSignificand(const APFloat &, bool subtract);
+ lostFraction multiplySignificand(const APFloat &, const APFloat *);
+ lostFraction divideSignificand(const APFloat &);
+ void incrementSignificand();
+ void initialize(const fltSemantics *);
+ void shiftSignificandLeft(unsigned int);
+ lostFraction shiftSignificandRight(unsigned int);
+ unsigned int significandLSB() const;
+ unsigned int significandMSB() const;
+ void zeroSignificand();
+
+ /* Arithmetic on special values. */
+ opStatus addOrSubtractSpecials(const APFloat &, bool subtract);
+ opStatus divideSpecials(const APFloat &);
+ opStatus multiplySpecials(const APFloat &);
+ opStatus modSpecials(const APFloat &);
+
+ /* Miscellany. */
+ static APFloat makeNaN(const fltSemantics &Sem, bool SNaN, bool Negative,
+ const APInt *fill);
+ void makeNaN(bool SNaN = false, bool Neg = false, const APInt *fill = 0);
+ opStatus normalize(roundingMode, lostFraction);
+ opStatus addOrSubtract(const APFloat &, roundingMode, bool subtract);
+ cmpResult compareAbsoluteValue(const APFloat &) const;
+ opStatus handleOverflow(roundingMode);
+ bool roundAwayFromZero(roundingMode, lostFraction, unsigned int) const;
+ opStatus convertToSignExtendedInteger(integerPart *, unsigned int, bool,
+ roundingMode, bool *) const;
+ opStatus convertFromUnsignedParts(const integerPart *, unsigned int,
+ roundingMode);
+ opStatus convertFromHexadecimalString(StringRef, roundingMode);
+ opStatus convertFromDecimalString(StringRef, roundingMode);
+ char *convertNormalToHexString(char *, unsigned int, bool,
+ roundingMode) const;
+ opStatus roundSignificandWithExponent(const integerPart *, unsigned int, int,
+ roundingMode);
+
+ APInt convertHalfAPFloatToAPInt() const;
+ APInt convertFloatAPFloatToAPInt() const;
+ APInt convertDoubleAPFloatToAPInt() const;
+ APInt convertQuadrupleAPFloatToAPInt() const;
+ APInt convertF80LongDoubleAPFloatToAPInt() const;
+ APInt convertPPCDoubleDoubleAPFloatToAPInt() const;
+ void initFromAPInt(const fltSemantics *Sem, const APInt &api);
+ void initFromHalfAPInt(const APInt &api);
+ void initFromFloatAPInt(const APInt &api);
+ void initFromDoubleAPInt(const APInt &api);
+ void initFromQuadrupleAPInt(const APInt &api);
+ void initFromF80LongDoubleAPInt(const APInt &api);
+ void initFromPPCDoubleDoubleAPInt(const APInt &api);
+
+ void assign(const APFloat &);
+ void copySignificand(const APFloat &);
+ void freeSignificand();
+
+ /* What kind of semantics does this value obey? */
+ const fltSemantics *semantics;
+
+ /* Significand - the fraction with an explicit integer bit. Must be
+ at least one bit wider than the target precision. */
+ union Significand {
+ integerPart part;
+ integerPart *parts;
+ } significand;
+
+ /* The exponent - a signed number. */
+ exponent_t exponent;
+
+ /* What kind of floating point number this is. */
+ /* Only 2 bits are required, but VisualStudio incorrectly sign extends
+ it. Using the extra bit keeps it from failing under VisualStudio */
+ fltCategory category : 3;
+
+ /* The sign bit of this number. */
+ unsigned int sign : 1;
+};
+
+// See friend declaration above. This additional declaration is required in
+// order to compile LLVM with IBM xlC compiler.
+hash_code hash_value(const APFloat &Arg);
} /* namespace llvm */
#endif /* LLVM_ADT_APFLOAT_H */
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