From b361adbb64535677d617e2680b06cc0283b07d1a Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Fri, 25 Jan 2013 17:01:00 +0000 Subject: APFloat: Make sure that we get a well-formed x87 NaN when converting from a smaller type. Fixes PR15054. llvm-svn: 173459 --- llvm/unittests/ADT/APFloatTest.cpp | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'llvm/unittests/ADT/APFloatTest.cpp') diff --git a/llvm/unittests/ADT/APFloatTest.cpp b/llvm/unittests/ADT/APFloatTest.cpp index 7345e124cd7..278983565ce 100644 --- a/llvm/unittests/ADT/APFloatTest.cpp +++ b/llvm/unittests/ADT/APFloatTest.cpp @@ -794,6 +794,32 @@ TEST(APFloatTest, convert) { test.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo); EXPECT_EQ(4294967295.0, test.convertToDouble()); EXPECT_FALSE(losesInfo); + + test = APFloat::getSNaN(APFloat::IEEEsingle); + APFloat X87SNaN = APFloat::getSNaN(APFloat::x87DoubleExtended); + test.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven, + &losesInfo); + EXPECT_TRUE(test.bitwiseIsEqual(X87SNaN)); + EXPECT_FALSE(losesInfo); + + test = APFloat::getQNaN(APFloat::IEEEsingle); + APFloat X87QNaN = APFloat::getQNaN(APFloat::x87DoubleExtended); + test.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven, + &losesInfo); + EXPECT_TRUE(test.bitwiseIsEqual(X87QNaN)); + EXPECT_FALSE(losesInfo); + + test = APFloat::getSNaN(APFloat::x87DoubleExtended); + test.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven, + &losesInfo); + EXPECT_TRUE(test.bitwiseIsEqual(X87SNaN)); + EXPECT_FALSE(losesInfo); + + test = APFloat::getQNaN(APFloat::x87DoubleExtended); + test.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven, + &losesInfo); + EXPECT_TRUE(test.bitwiseIsEqual(X87QNaN)); + EXPECT_FALSE(losesInfo); } TEST(APFloatTest, PPCDoubleDouble) { -- cgit v1.2.3