Implement APFloat::isDenormal()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171764 91177308-0d34-0410-b5e6-96231b3b80d8
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 @@
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());