1 | //===----------------------------------------------------------------------===// |
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 | // Test the __XXXX routines in the <bit> header. |
10 | // These are not supposed to be exhaustive tests, just sanity checks. |
11 | |
12 | #include <__bit/bit_log2.h> |
13 | #include <__bit/countl.h> |
14 | #include <__bit/rotate.h> |
15 | #include <cassert> |
16 | |
17 | #include "test_macros.h" |
18 | |
19 | TEST_CONSTEXPR_CXX14 bool test() { |
20 | const unsigned v = 0x12345678; |
21 | |
22 | ASSERT_SAME_TYPE(unsigned, decltype(std::__rotr(v, 3))); |
23 | ASSERT_SAME_TYPE(int, decltype(std::__countl_zero(v))); |
24 | |
25 | assert(std::__rotr(v, 3) == 0x02468acfU); |
26 | assert(std::__countl_zero(v) == 3); |
27 | |
28 | #if TEST_STD_VER > 17 |
29 | ASSERT_SAME_TYPE(unsigned, decltype(std::__bit_log2(v))); |
30 | assert(std::__bit_log2(v) == 28); |
31 | #endif |
32 | |
33 | return true; |
34 | } |
35 | |
36 | int main(int, char**) { |
37 | test(); |
38 | #if TEST_STD_VER > 11 |
39 | static_assert(test(), "" ); |
40 | #endif |
41 | |
42 | return 0; |
43 | } |
44 | |