xref: /llvm-project/libc/test/src/stdbit/stdc_trailing_ones_ui_test.cpp (revision 7760006d8d39e7624601936e2b1b428d850726b8) 
1 //===-- Unittests for stdc_trailing_ones_ui -------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/__support/CPP/limits.h"
10 #include "src/stdbit/stdc_trailing_ones_ui.h"
11 #include "test/UnitTest/Test.h"
12 
TEST(LlvmLibcStdcTrailingOnesUiTest,ALL)13 TEST(LlvmLibcStdcTrailingOnesUiTest, ALL) {
14   EXPECT_EQ(LIBC_NAMESPACE::stdc_trailing_ones_ui(UINT_MAX),
15             static_cast<unsigned>(UINT_WIDTH));
16 }
17 
TEST(LlvmLibcStdcTrailingOnesUiTest,ZeroHot)18 TEST(LlvmLibcStdcTrailingOnesUiTest, ZeroHot) {
19   for (unsigned i = 0U; i != UINT_WIDTH; ++i)
20     EXPECT_EQ(LIBC_NAMESPACE::stdc_trailing_ones_ui(~(1U << i)), i);
21 }
22