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author | George Karpenkov <ekarpenkov@apple.com> | 2018-06-13 18:32:02 +0000 |
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committer | George Karpenkov <ekarpenkov@apple.com> | 2018-06-13 18:32:02 +0000 |
commit | b97b3021fc7b9eb912c61f6c9dfd03f0e35b7cc4 (patch) | |
tree | f93b8372a01abcb105d6c77f9abca95e970f2075 /unittests/Support | |
parent | ba86f98ba71d995dc8d91b2e737ee09f4d59fd14 (diff) |
Add checkMulAdd helper function to CheckedArithmetic
Multiplication followed by addition
(https://en.wikipedia.org/wiki/Multiply–accumulate_operation) is a
sufficiently common use-case to warrant a separate helper.
Differential Revision: https://reviews.llvm.org/D48138
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334635 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests/Support')
-rw-r--r-- | unittests/Support/CheckedArithmeticTest.cpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/unittests/Support/CheckedArithmeticTest.cpp b/unittests/Support/CheckedArithmeticTest.cpp index f797a9ed41e..18eee4c447e 100644 --- a/unittests/Support/CheckedArithmeticTest.cpp +++ b/unittests/Support/CheckedArithmeticTest.cpp @@ -32,6 +32,15 @@ TEST(CheckedArithmetic, CheckedMul) { EXPECT_EQ(checkedMul<int64_t>(10, 2), Optional<int64_t>(20)); } +TEST(CheckedArithmetic, CheckedMulAdd) { + const int64_t Max = std::numeric_limits<int64_t>::max(); + const int64_t Min = std::numeric_limits<int64_t>::min(); + EXPECT_EQ(checkedMulAdd<int64_t>(Max, 1, 2), None); + EXPECT_EQ(checkedMulAdd<int64_t>(1, 1, Max), None); + EXPECT_EQ(checkedMulAdd<int64_t>(1, -1, Min), None); + EXPECT_EQ(checkedMulAdd<int64_t>(10, 2, 3), Optional<int64_t>(23)); +} + TEST(CheckedArithmetic, CheckedMulSmall) { const int16_t Max = std::numeric_limits<int16_t>::max(); const int16_t Min = std::numeric_limits<int16_t>::min(); @@ -41,6 +50,15 @@ TEST(CheckedArithmetic, CheckedMulSmall) { EXPECT_EQ(checkedMul<int16_t>(10, 2), Optional<int16_t>(20)); } +TEST(CheckedArithmetic, CheckedMulAddSmall) { + const int16_t Max = std::numeric_limits<int16_t>::max(); + const int16_t Min = std::numeric_limits<int16_t>::min(); + EXPECT_EQ(checkedMulAdd<int16_t>(Max, 1, 2), None); + EXPECT_EQ(checkedMulAdd<int16_t>(1, 1, Max), None); + EXPECT_EQ(checkedMulAdd<int16_t>(1, -1, Min), None); + EXPECT_EQ(checkedMulAdd<int16_t>(10, 2, 3), Optional<int16_t>(23)); +} + TEST(CheckedArithmetic, CheckedAddUnsigned) { const uint64_t Max = std::numeric_limits<uint64_t>::max(); EXPECT_EQ(checkedAddUnsigned<uint64_t>(Max, Max), None); @@ -55,5 +73,12 @@ TEST(CheckedArithmetic, CheckedMulUnsigned) { EXPECT_EQ(checkedMulUnsigned<uint64_t>(10, 2), Optional<uint64_t>(20)); } +TEST(CheckedArithmetic, CheckedMulAddUnsigned) { + const uint64_t Max = std::numeric_limits<uint64_t>::max(); + EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(Max, 1, 2), None); + EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(1, 1, Max), None); + EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(10, 2, 3), Optional<uint64_t>(23)); +} + } // namespace |