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| author | John McCall <rjmccall@apple.com> | 2010-02-28 02:51:25 +0000 |
|---|---|---|
| committer | John McCall <rjmccall@apple.com> | 2010-02-28 02:51:25 +0000 |
| commit | e12b73816b50bbe2cc54b8005d86c95413b4f465 (patch) | |
| tree | 167c037c24ea67c3d1d116f1ac9df701eb863a0e /unittests/ADT/APFloatTest.cpp | |
| parent | 6281cda6737bcda0e924318ddcce28392001691e (diff) | |
| download | llvm-e12b73816b50bbe2cc54b8005d86c95413b4f465.tar.gz llvm-e12b73816b50bbe2cc54b8005d86c95413b4f465.tar.bz2 llvm-e12b73816b50bbe2cc54b8005d86c95413b4f465.tar.xz | |
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
Diffstat (limited to 'unittests/ADT/APFloatTest.cpp')
| -rw-r--r-- | unittests/ADT/APFloatTest.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index 3277c836da..571996013e 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -344,6 +344,35 @@ TEST(APFloatTest, toString) { 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"); |