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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-11-08 13:58:10 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-11-08 13:58:10 +0000 |
| commit | 08be41adbf6a3671a9ae1fe2927481609121e18f (patch) | |
| tree | 105a8552f3920619b0e1e8c262248f88e0300129 | |
| parent | 9b836fb019bb82970464f4e14b36a6e51dbdc7dd (diff) | |
| download | bcm5719-llvm-08be41adbf6a3671a9ae1fe2927481609121e18f.tar.gz bcm5719-llvm-08be41adbf6a3671a9ae1fe2927481609121e18f.zip | |
Drop the limitation to IEEE floating point types from the fdiv of pow2 -> fmul transform.
This is safe for x87 long doubles and ppc double doubles too.
llvm-svn: 167582
| -rw-r--r-- | llvm/lib/Support/APFloat.cpp | 5 | ||||
| -rw-r--r-- | llvm/unittests/ADT/APFloatTest.cpp | 6 |
2 files changed, 6 insertions, 5 deletions
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp index 43c68f4d1d1..7e8b4a3d0d2 100644 --- a/llvm/lib/Support/APFloat.cpp +++ b/llvm/lib/Support/APFloat.cpp @@ -3553,11 +3553,6 @@ void APFloat::toString(SmallVectorImpl<char> &Str, } bool APFloat::getExactInverse(APFloat *inv) const { - // We can only guarantee the existence of an exact inverse for IEEE floats. - if (semantics != &IEEEhalf && semantics != &IEEEsingle && - semantics != &IEEEdouble && semantics != &IEEEquad) - return false; - // Special floats and denormals have no exact inverse. if (category != fcNormal) return false; diff --git a/llvm/unittests/ADT/APFloatTest.cpp b/llvm/unittests/ADT/APFloatTest.cpp index 48d5d830193..117b8204b9e 100644 --- a/llvm/unittests/ADT/APFloatTest.cpp +++ b/llvm/unittests/ADT/APFloatTest.cpp @@ -635,6 +635,12 @@ TEST(APFloatTest, exactInverse) { EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(0.5))); EXPECT_TRUE(APFloat(2.0f).getExactInverse(&inv)); EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(0.5f))); + EXPECT_TRUE(APFloat(APFloat::IEEEquad, "2.0").getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(APFloat::IEEEquad, "0.5"))); + EXPECT_TRUE(APFloat(APFloat::PPCDoubleDouble, "2.0").getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(APFloat::PPCDoubleDouble, "0.5"))); + EXPECT_TRUE(APFloat(APFloat::x87DoubleExtended, "2.0").getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(APFloat::x87DoubleExtended, "0.5"))); // FLT_MIN EXPECT_TRUE(APFloat(1.17549435e-38f).getExactInverse(&inv)); |
