1//===-- Unittests for stdc_first_leading_one_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_first_leading_one_us.h"
11#include "test/UnitTest/Test.h"
12
13TEST(LlvmLibcStdcFirstLeadingOneUsTest, Zero) {
14 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_us(0U), 0U);
15}
16
17TEST(LlvmLibcStdcFirstLeadingOneUsTest, OneHot) {
18 for (unsigned i = 0U; i != USHRT_WIDTH; ++i)
19 EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_us(1U << i),
20 USHRT_WIDTH - i);
21}
22

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