22 lines · cpp
1//===-- Unittests for stdc_first_leading_one_ull --------------------------===//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_ull.h"11#include "test/UnitTest/Test.h"12 13TEST(LlvmLibcStdcFirstLeadingOneUllTest, Zero) {14 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_ull(0ULL), 0U);15}16 17TEST(LlvmLibcStdcFirstLeadingOneUllTest, OneHot) {18 for (unsigned i = 0U; i != ULLONG_WIDTH; ++i)19 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_ull(1ULL << i),20 ULLONG_WIDTH - i);21}22