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-exception 6 // 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 TEST(LlvmLibcStdcLeadingZerosUiTest,Zero)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 TEST(LlvmLibcStdcLeadingZerosUiTest,OneHot)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