1 //===-- Unittests for stdc_leading_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_leading_zeros_ul.h" 11 #include "test/UnitTest/Test.h" 12 #include <stddef.h> 13 TEST(LlvmLibcStdcLeadingZerosUlTest,Zero)14TEST(LlvmLibcStdcLeadingZerosUlTest, Zero) { 15 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ul(0UL), 16 static_cast<unsigned>(ULONG_WIDTH)); 17 } 18 TEST(LlvmLibcStdcLeadingZerosUlTest,OneHot)19TEST(LlvmLibcStdcLeadingZerosUlTest, OneHot) { 20 for (unsigned i = 0U; i != ULONG_WIDTH; ++i) 21 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ul(1UL << i), 22 ULONG_WIDTH - i - 1U); 23 } 24