commit c82cc587a468d44e5cfabfa8f8a639667127845d
author Owen Anderson <resistor@mac.com> Wed Aug 15 18:28:45 2012 +0000
committer Owen Anderson <resistor@mac.com> Wed Aug 15 18:28:45 2012 +0000
tree 05e458aa3ea8daf0d4dcdadcdabc918473cc38df
parent c97eda2c9e34f4c491f59bbac81af2fd63fef49d

Fix another roundToIntegral bug where very large values could become infinity.  Problem and solution identified by Steve Canon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161969 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ADT/APFloatTest.cpp

diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp
index caa288a..00b62fe 100644
--- a/unittests/ADT/APFloatTest.cpp
+++ b/unittests/ADT/APFloatTest.cpp
@@ -649,7 +649,7 @@
 }
 
 TEST(APFloatTest, roundToIntegral) {
-  APFloat T(-0.5), S(3.14), P(0.0);
+  APFloat T(-0.5), S(3.14), R(APFloat::getLargest(APFloat::IEEEdouble)), P(0.0);
 
   P = T;
   P.roundToIntegral(APFloat::rmTowardZero);
@@ -676,6 +676,19 @@
   P = S;
   P.roundToIntegral(APFloat::rmNearestTiesToEven);
   EXPECT_EQ(3.0, P.convertToDouble());
+
+  P = R;
+  P.roundToIntegral(APFloat::rmTowardZero);
+  EXPECT_EQ(R.convertToDouble(), P.convertToDouble());
+  P = R;
+  P.roundToIntegral(APFloat::rmTowardNegative);
+  EXPECT_EQ(R.convertToDouble(), P.convertToDouble());
+  P = R;
+  P.roundToIntegral(APFloat::rmTowardPositive);
+  EXPECT_EQ(R.convertToDouble(), P.convertToDouble());
+  P = R;
+  P.roundToIntegral(APFloat::rmNearestTiesToEven);
+  EXPECT_EQ(R.convertToDouble(), P.convertToDouble());
 }
 
 TEST(APFloatTest, getLargest) {