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
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

source code of libc/test/src/stdbit/stdc_leading_zeros_ui_test.cpp