| 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 | |
| 13 | TEST(LlvmLibcStdcFirstLeadingOneUsTest, Zero) { |
| 14 | EXPECT_EQ(LIBC_NAMESPACE::stdc_first_leading_one_us(0U), 0U); |
| 15 | } |
| 16 | |
| 17 | TEST(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 |