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[APFloat] Added make{Zero,Inf} methods and implemented get{Zero,Inf} on top of them.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184712 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-06-24 09:58:02 +00:00
parent fb25071a18
commit fdec0c7a73
2 changed files with 24 additions and 2 deletions
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10
include/llvm/ADT/APFloat.h
View File

@ -211,14 +211,18 @@ public:
///
/// \param Negative True iff the number should be negative.
static APFloat getZero(const fltSemantics &Sem, bool Negative = false) {
return APFloat(Sem, fcZero, Negative);
APFloat Val(Sem, uninitialized);
Val.makeZero(Negative);
return Val;
}
/// Factory for Positive and Negative Infinity.
///
/// \param Negative True iff the number should be negative.
static APFloat getInf(const fltSemantics &Sem, bool Negative = false) {
return APFloat(Sem, fcInfinity, Negative);
APFloat Val(Sem, uninitialized);
Val.makeInf(Negative);
return Val;
}
/// Factory for QNaN values.
@ -498,6 +502,8 @@ private:
void makeNaN(bool SNaN = false, bool Neg = false, const APInt *fill = 0);
static APFloat makeNaN(const fltSemantics &Sem, bool SNaN, bool Negative,
const APInt *fill);
void makeInf(bool Neg = false);
void makeZero(bool Neg = false);
/// @}

16
lib/Support/APFloat.cpp
View File

@ -3827,3 +3827,19 @@ APFloat::opStatus APFloat::next(bool nextDown) {
return result;
}
void
APFloat::makeInf(bool Negative) {
category = fcInfinity;
sign = Negative;
exponent = semantics->maxExponent + 1;
APInt::tcSet(significandParts(), 0, partCount());
}
void
APFloat::makeZero(bool Negative) {
category = fcZero;
sign = Negative;
exponent = semantics->minExponent-1;
APInt::tcSet(significandParts(), 0, partCount());
}