From 8398512f89623144c8bb45ce9deb4f74f76480fc Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Wed, 30 Mar 2011 17:02:54 +0000 Subject: Avoid turning a floating point division with a constant power of two into a denormal multiplication. Some platforms may treat denormals as zero, on other platforms multiplication with a subnormal is slower than dividing by a normal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128555 91177308-0d34-0410-b5e6-96231b3b80d8 --- unittests/ADT/APFloatTest.cpp | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'unittests') diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index dea4a65b88..5f05b86169 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -589,10 +589,8 @@ TEST(APFloatTest, exactInverse) { EXPECT_TRUE(APFloat(1.17549435e-38f).getExactInverse(&inv)); EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(8.5070592e+37f))); - // Large float - EXPECT_TRUE(APFloat(1.7014118e38f).getExactInverse(&inv)); - EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(5.8774718e-39f))); - + // Large float, inverse is a denormal. + EXPECT_FALSE(APFloat(1.7014118e38f).getExactInverse(0)); // Zero EXPECT_FALSE(APFloat(0.0).getExactInverse(0)); // Denormalized float -- cgit v1.2.3