xref: /llvm-project/libc/test/src/stdbit/stdc_trailing_zeros_ul_test.cpp (revision d5a3de4aeef4f4f1c52692533ddb9fdf45aef9d3) 
1 //===-- Unittests for stdc_trailing_zeros_ul ------------------------------===//
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_zeros_ul.h"
11 #include "test/UnitTest/Test.h"
12 
TEST(LlvmLibcStdcTrailingZerosUlTest,Zero)13 TEST(LlvmLibcStdcTrailingZerosUlTest, Zero) {
14   EXPECT_EQ(LIBC_NAMESPACE::stdc_trailing_zeros_ul(0U),
15             static_cast<unsigned>(ULONG_WIDTH));
16 }
17 
TEST(LlvmLibcStdcTrailingZerosUlTest,OneHot)18 TEST(LlvmLibcStdcTrailingZerosUlTest, OneHot) {
19   for (unsigned i = 0U; i != ULONG_WIDTH; ++i)
20     EXPECT_EQ(LIBC_NAMESPACE::stdc_trailing_zeros_ul(1UL << i), i);
21 }
22