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