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

llvm-svn: 184712

llvm/include/llvm/ADT/APFloat.h

@@ -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);
 
   /// @}
 

llvm/lib/Support/APFloat.cpp

@@ -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());  
+}