23 lines · cpp
1//===-- Unittests for stdc_first_leading_one_uc ---------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/__support/CPP/limits.h"10#include "src/stdbit/stdc_first_leading_one_uc.h"11#include "test/UnitTest/Test.h"12 13TEST(LlvmLibcStdcFirstLeadingOneUcTest, Zero) {14 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_uc(0U), 0U);15}16 17TEST(LlvmLibcStdcFirstLeadingOneUcTest, OneHot) {18 for (unsigned i = 0U; i != UCHAR_WIDTH; ++i)19 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_uc(20 static_cast<unsigned char>(1U << i)),21 UCHAR_WIDTH - i);22}23