24 lines · cpp
1//===-- Unittests for stdc_leading_zeros_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_leading_zeros_ull.h"11#include "test/UnitTest/Test.h"12#include <stddef.h>13 14TEST(LlvmLibcStdcLeadingZerosUllTest, Zero) {15 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ull(0ULL),16 static_cast<unsigned>(ULLONG_WIDTH));17}18 19TEST(LlvmLibcStdcLeadingZerosUllTest, OneHot) {20 for (unsigned i = 0U; i != ULLONG_WIDTH; ++i)21 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ull(1ULL << i),22 ULLONG_WIDTH - i - 1U);23}24