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