From cbc7cc63b6c7ee1008f92064388c37327c183328 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Tue, 13 Oct 2009 01:49:02 +0000 Subject: Add a ceilLogBase2 function to APInt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83932 91177308-0d34-0410-b5e6-96231b3b80d8 --- unittests/ADT/APIntTest.cpp | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'unittests') diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp index 24a3d9b4ad..7b03d0f00c 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) { -- cgit v1.2.3