Teach APFloat how to create both QNaNs and SNaNs and with arbitrary-width
payloads. APFloat's internal folding routines always make QNaNs now,
instead of sometimes making QNaNs and sometimes SNaNs depending on the
type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97364 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp
index 3277c83..5719960 100644
--- a/unittests/ADT/APFloatTest.cpp
+++ b/unittests/ADT/APFloatTest.cpp
@@ -344,6 +344,35 @@
ASSERT_EQ("8.731834E+2", convertToString(873.1834, 0, 0));
}
+static APInt nanbits(const fltSemantics &Sem,
+ bool SNaN, bool Negative, uint64_t fill) {
+ APInt apfill(64, fill);
+ if (SNaN)
+ return APFloat::getSNaN(Sem, Negative, &apfill).bitcastToAPInt();
+ else
+ return APFloat::getQNaN(Sem, Negative, &apfill).bitcastToAPInt();
+}
+
+TEST(APFloatTest, makeNaN) {
+ ASSERT_EQ(0x7fc00000, nanbits(APFloat::IEEEsingle, false, false, 0));
+ ASSERT_EQ(0xffc00000, nanbits(APFloat::IEEEsingle, false, true, 0));
+ ASSERT_EQ(0x7fc0ae72, nanbits(APFloat::IEEEsingle, false, false, 0xae72));
+ ASSERT_EQ(0x7fffae72, nanbits(APFloat::IEEEsingle, false, false, 0xffffae72));
+ ASSERT_EQ(0x7fa00000, nanbits(APFloat::IEEEsingle, true, false, 0));
+ ASSERT_EQ(0xffa00000, nanbits(APFloat::IEEEsingle, true, true, 0));
+ ASSERT_EQ(0x7f80ae72, nanbits(APFloat::IEEEsingle, true, false, 0xae72));
+ ASSERT_EQ(0x7fbfae72, nanbits(APFloat::IEEEsingle, true, false, 0xffffae72));
+
+ ASSERT_EQ(0x7ff8000000000000ULL, nanbits(APFloat::IEEEdouble, false, false, 0));
+ ASSERT_EQ(0xfff8000000000000ULL, nanbits(APFloat::IEEEdouble, false, true, 0));
+ ASSERT_EQ(0x7ff800000000ae72ULL, nanbits(APFloat::IEEEdouble, false, false, 0xae72));
+ ASSERT_EQ(0x7fffffffffffae72ULL, nanbits(APFloat::IEEEdouble, false, false, 0xffffffffffffae72ULL));
+ ASSERT_EQ(0x7ff4000000000000ULL, nanbits(APFloat::IEEEdouble, true, false, 0));
+ ASSERT_EQ(0xfff4000000000000ULL, nanbits(APFloat::IEEEdouble, true, true, 0));
+ ASSERT_EQ(0x7ff000000000ae72ULL, nanbits(APFloat::IEEEdouble, true, false, 0xae72));
+ ASSERT_EQ(0x7ff7ffffffffae72ULL, nanbits(APFloat::IEEEdouble, true, false, 0xffffffffffffae72ULL));
+}
+
#ifdef GTEST_HAS_DEATH_TEST
TEST(APFloatTest, SemanticsDeath) {
EXPECT_DEATH(APFloat(APFloat::IEEEsingle, 0.0f).convertToDouble(), "Float semantics are not IEEEdouble");