From 7aa1c321f00d29fdc84e9a03080853aa25dd06fc Mon Sep 17 00:00:00 2001 From: Shuxin Yang Date: Mon, 7 Jan 2013 18:59:35 +0000 Subject: Implement APFloat::isDenormal() git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171764 91177308-0d34-0410-b5e6-96231b3b80d8 --- unittests/ADT/APFloatTest.cpp | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'unittests') diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index ff350a7..7345e12 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -33,6 +33,58 @@ static std::string convertToString(double d, unsigned Prec, unsigned Pad) { namespace { +TEST(APFloatTest, Denormal) { + APFloat::roundingMode rdmd = APFloat::rmNearestTiesToEven; + + // Test single precision + { + const char *MinNormalStr = "1.17549435082228750797e-38"; + EXPECT_FALSE(APFloat(APFloat::IEEEsingle, MinNormalStr).isDenormal()); + EXPECT_FALSE(APFloat(APFloat::IEEEsingle, 0.0).isDenormal()); + + APFloat Val2(APFloat::IEEEsingle, 2.0e0); + APFloat T(APFloat::IEEEsingle, MinNormalStr); + T.divide(Val2, rdmd); + EXPECT_TRUE(T.isDenormal()); + } + + // Test double precision + { + const char *MinNormalStr = "2.22507385850720138309e-308"; + EXPECT_FALSE(APFloat(APFloat::IEEEdouble, MinNormalStr).isDenormal()); + EXPECT_FALSE(APFloat(APFloat::IEEEdouble, 0.0).isDenormal()); + + APFloat Val2(APFloat::IEEEdouble, 2.0e0); + APFloat T(APFloat::IEEEdouble, MinNormalStr); + T.divide(Val2, rdmd); + EXPECT_TRUE(T.isDenormal()); + } + + // Test Intel double-ext + { + const char *MinNormalStr = "3.36210314311209350626e-4932"; + EXPECT_FALSE(APFloat(APFloat::x87DoubleExtended, MinNormalStr).isDenormal()); + EXPECT_FALSE(APFloat(APFloat::x87DoubleExtended, 0.0).isDenormal()); + + APFloat Val2(APFloat::x87DoubleExtended, 2.0e0); + APFloat T(APFloat::x87DoubleExtended, MinNormalStr); + T.divide(Val2, rdmd); + EXPECT_TRUE(T.isDenormal()); + } + + // Test quadruple precision + { + const char *MinNormalStr = "3.36210314311209350626267781732175260e-4932"; + EXPECT_FALSE(APFloat(APFloat::IEEEquad, MinNormalStr).isDenormal()); + EXPECT_FALSE(APFloat(APFloat::IEEEquad, 0.0).isDenormal()); + + APFloat Val2(APFloat::IEEEquad, 2.0e0); + APFloat T(APFloat::IEEEquad, MinNormalStr); + T.divide(Val2, rdmd); + EXPECT_TRUE(T.isDenormal()); + } +} + TEST(APFloatTest, Zero) { EXPECT_EQ(0.0f, APFloat(0.0f).convertToFloat()); EXPECT_EQ(-0.0f, APFloat(-0.0f).convertToFloat()); -- cgit v1.1