Revert "[APFloat] Removed APFloat constructor which initialized to either zero/NaN but allowed you to arbitrarily set the category of the float."

This reverts commit r185095. This is causing a FileCheck failure on
the 3dnow intrinsics on at least the mips/ppc bots but not on the x86
bots.

Reverting while I figure out what is going on.

llvm-svn: 185099

1 files changed, 15 insertions, 5 deletions

diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp
index a7ff9f68cf7..2eaf2b56bd5 100644
--- a/llvm/lib/Support/APFloat.cpp
+++ b/llvm/lib/Support/APFloat.cpp
@@ -795,6 +795,17 @@ APFloat::APFloat(const fltSemantics &ourSemantics, uninitializedTag tag) {
   initialize(&ourSemantics);
 }
 
+APFloat::APFloat(const fltSemantics &ourSemantics,
+                 fltCategory ourCategory, bool negative) {
+  initialize(&ourSemantics);
+  category = ourCategory;
+  sign = negative;
+  if (isFiniteNonZero())
+    category = fcZero;
+  else if (ourCategory == fcNaN)
+    makeNaN();
+}
+
 APFloat::APFloat(const fltSemantics &ourSemantics, StringRef text) {
   initialize(&ourSemantics);
   convertFromString(text, rmNearestTiesToEven);
@@ -2395,8 +2406,8 @@ APFloat::roundSignificandWithExponent(const integerPart *decSigParts,
     excessPrecision = calcSemantics.precision - semantics->precision;
     truncatedBits = excessPrecision;
 
-    APFloat decSig = APFloat::getZero(calcSemantics, sign);
-    APFloat pow5(calcSemantics);
+    APFloat decSig(calcSemantics, fcZero, sign);
+    APFloat pow5(calcSemantics, fcZero, false);
 
     sigStatus = decSig.convertFromUnsignedParts(decSigParts, sigPartCount,
                                                 rmNearestTiesToEven);
@@ -3377,16 +3388,15 @@ APFloat APFloat::getSmallest(const fltSemantics &Sem, bool Negative) {
 }
 
 APFloat APFloat::getSmallestNormalized(const fltSemantics &Sem, bool Negative) {
-  APFloat Val(Sem, uninitialized);
+  APFloat Val(Sem, fcNormal, Negative);
 
   // We want (in interchange format):
   //   sign = {Negative}
   //   exponent = 0..0
   //   significand = 10..0
 
-  Val.zeroSignificand();
-  Val.sign = Negative;
   Val.exponent = Sem.minExponent;
+  Val.zeroSignificand();
   Val.significandParts()[partCountForBits(Sem.precision)-1] |=
     (((integerPart) 1) << ((Sem.precision - 1) % integerPartWidth));