| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // Test the __XXXX routines in the <bit> header. |
| // These are not supposed to be exhaustive tests, just sanity checks. |
| |
| #include <bit> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| TEST_CONSTEXPR_CXX14 bool test() { |
| const unsigned v = 0x12345678; |
| |
| ASSERT_SAME_TYPE(unsigned, decltype(std::__rotr(v, 3))); |
| ASSERT_SAME_TYPE(int, decltype(std::__countl_zero(v))); |
| |
| assert(std::__rotr(v, 3) == 0x02468acfU); |
| assert(std::__countl_zero(v) == 3); |
| |
| #if TEST_STD_VER > 17 |
| ASSERT_SAME_TYPE(unsigned, decltype(std::__bit_log2(v))); |
| assert(std::__bit_log2(v) == 28); |
| #endif |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| #if TEST_STD_VER > 11 |
| static_assert(test(), ""); |
| #endif |
| |
| return 0; |
| } |