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authorShuxin Yang <shuxin.llvm@gmail.com>2013-01-07 18:59:35 +0000
committerShuxin Yang <shuxin.llvm@gmail.com>2013-01-07 18:59:35 +0000
commit7aa1c321f00d29fdc84e9a03080853aa25dd06fc (patch)
tree013045c273e9f818563d36147da2af4326e82721 /unittests
parent637582eaf77e6892094cea0bf6b9483f50b5d94e (diff)
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Implement APFloat::isDenormal()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171764 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests')
-rw-r--r--unittests/ADT/APFloatTest.cpp52
1 files changed, 52 insertions, 0 deletions
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());