27 lines · cpp
1//===-- Unittests for stdc_leading_zeros_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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/__support/CPP/limits.h"10#include "src/stdbit/stdc_leading_zeros_ui.h"11#include "test/UnitTest/Test.h"12#include <stddef.h>13 14TEST(LlvmLibcStdcLeadingZerosUiTest, Zero) {15 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ui(0U),16 static_cast<unsigned>(17 LIBC_NAMESPACE::cpp::numeric_limits<unsigned int>::digits));18}19 20TEST(LlvmLibcStdcLeadingZerosUiTest, OneHot) {21 for (unsigned i = 0U;22 i != LIBC_NAMESPACE::cpp::numeric_limits<unsigned int>::digits; ++i)23 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ui(1U << i),24 LIBC_NAMESPACE::cpp::numeric_limits<unsigned int>::digits - i -25 1);26}27