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| author | Dan Gohman <gohman@apple.com> | 2009-10-13 01:49:02 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-10-13 01:49:02 +0000 |
| commit | c4e367b85430cfc4a0919ac8f16abb6884f720ea (patch) | |
| tree | a22c6861bea9e10e4ef7967572cacb4043998afd /llvm/unittests/ADT/APIntTest.cpp | |
| parent | 70e8505eb1a5379d884f3bfd8cc7f9f252edcaec (diff) | |
| download | llvm-c4e367b85430cfc4a0919ac8f16abb6884f720ea.zip llvm-c4e367b85430cfc4a0919ac8f16abb6884f720ea.tar.gz llvm-c4e367b85430cfc4a0919ac8f16abb6884f720ea.tar.bz2 | |
Add a ceilLogBase2 function to APInt.
llvm-svn: 83932
Diffstat (limited to 'llvm/unittests/ADT/APIntTest.cpp')
| -rw-r--r-- | llvm/unittests/ADT/APIntTest.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/APIntTest.cpp b/llvm/unittests/ADT/APIntTest.cpp index 24a3d9b..7b03d0f 100644 --- a/llvm/unittests/ADT/APIntTest.cpp +++ b/llvm/unittests/ADT/APIntTest.cpp @@ -315,6 +315,17 @@ TEST(APIntTest, StringBitsNeeded16) { EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16)); } +TEST(APIntTest, Log2) { + EXPECT_EQ(APInt(15, 7).logBase2(), 2); + EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3); + EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1); + EXPECT_EQ(APInt(15, 8).logBase2(), 3); + EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3); + EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3); + EXPECT_EQ(APInt(15, 9).logBase2(), 3); + EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4); + EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1); +} #ifdef GTEST_HAS_DEATH_TEST TEST(APIntTest, StringDeath) { |