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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 | cbc7cc63b6c7ee1008f92064388c37327c183328 (patch) | |
| tree | 7658fbbdc579a3674ef2261cc546986c5f3dcff4 /unittests/ADT | |
| parent | 5c78736f85579aa6de38cba2742ea13ff9f79e70 (diff) | |
| download | external_llvm-cbc7cc63b6c7ee1008f92064388c37327c183328.zip external_llvm-cbc7cc63b6c7ee1008f92064388c37327c183328.tar.gz external_llvm-cbc7cc63b6c7ee1008f92064388c37327c183328.tar.bz2 | |
Add a ceilLogBase2 function to APInt.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83932 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests/ADT')
| -rw-r--r-- | unittests/ADT/APIntTest.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp index 24a3d9b..7b03d0f 100644 --- a/unittests/ADT/APIntTest.cpp +++ b/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) { |