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>(INT_WIDTH)); 17 } 18 TEST(LlvmLibcStdcLeadingZerosUiTest,OneHot)19TEST(LlvmLibcStdcLeadingZerosUiTest, OneHot) { 20 for (unsigned i = 0U; i != INT_WIDTH; ++i) 21 EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ui(1U << i), 22 INT_WIDTH - i - 1); 23 } 24