diff options
Diffstat (limited to 'include/llvm/ADT/APFloat.h')
| -rw-r--r-- | include/llvm/ADT/APFloat.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/llvm/ADT/APFloat.h b/include/llvm/ADT/APFloat.h index 30d998f..f81109a 100644 --- a/include/llvm/ADT/APFloat.h +++ b/include/llvm/ADT/APFloat.h @@ -191,6 +191,7 @@ namespace llvm { 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. @@ -201,6 +202,26 @@ namespace llvm { return APFloat(Sem, fcNaN, Negative, type); } + /// 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); + /// Profile - Used to insert APFloat objects, or objects that contain /// APFloat objects, into FoldingSets. void Profile(FoldingSetNodeID& NID) const; @@ -277,6 +298,30 @@ namespace llvm { /* Return an arbitrary integer value usable for hashing. */ uint32_t getHashValue() const; + /// 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); + private: /* Trivial queries. */ |
