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// UNSUPPORTED: c++03, c++11, c++14
10
11// <experimental/simd>
12//
13// Note: To ensure the swap functions can be called directly in the std::experimental namespace,
14// the implementation approach might not fully align with the specification.
15//
16// [simd.reference]
17// friend void swap(reference&& a, reference&& b) noexcept;
18// friend void swap(value_type& a, reference&& b) noexcept;
19// friend void swap(reference&& a, value_type& b) noexcept;
20
21#include "../test_utils.h"
22#include <experimental/simd>
23
24namespace ex = std::experimental::parallelism_v2;
25
26template <class T, std::size_t>
27struct CheckSimdRefSwap {
28 template <class SimdAbi>
29 void operator()() {
30 ex::simd<T, SimdAbi> origin_simd_1(1);
31 ex::simd<T, SimdAbi> origin_simd_2(2);
32 T value = 3;
33
34 static_assert(noexcept(ex::swap(std::move(origin_simd_1[0]), std::move(origin_simd_2[0]))));
35 ex::swap(std::move(origin_simd_1[0]), std::move(origin_simd_2[0]));
36 assert((origin_simd_1[0] == 2) && (origin_simd_2[0] == 1));
37
38 static_assert(noexcept(ex::swap(std::move(origin_simd_1[0]), value)));
39 ex::swap(std::move(origin_simd_1[0]), value);
40 assert((origin_simd_1[0] == 3) && (value == 2));
41
42 static_assert(noexcept(ex::swap(value, std::move(origin_simd_2[0]))));
43 ex::swap(value, std::move(origin_simd_2[0]));
44 assert((value == 1) && (origin_simd_2[0] == 2));
45 }
46};
47
48template <class T, std::size_t>
49struct CheckMaskRefSwap {
50 template <class SimdAbi>
51 void operator()() {
52 ex::simd_mask<T, SimdAbi> origin_mask_1(true);
53 ex::simd_mask<T, SimdAbi> origin_mask_2(false);
54 bool value = true;
55
56 static_assert(noexcept(ex::swap(std::move(origin_mask_1[0]), std::move(origin_mask_2[0]))));
57 ex::swap(std::move(origin_mask_1[0]), std::move(origin_mask_2[0]));
58 assert((origin_mask_1[0] == false) && (origin_mask_2[0] == true));
59
60 static_assert(noexcept(ex::swap(std::move(origin_mask_1[0]), value)));
61 ex::swap(std::move(origin_mask_1[0]), value);
62 assert((origin_mask_1[0] == true) && (value == false));
63
64 static_assert(noexcept(ex::swap(value, std::move(origin_mask_2[0]))));
65 ex::swap(value, std::move(origin_mask_2[0]));
66 assert((value == true) && (origin_mask_2[0] == false));
67 }
68};
69
70int main(int, char**) {
71 test_all_simd_abi<CheckSimdRefSwap>();
72 test_all_simd_abi<CheckMaskRefSwap>();
73 return 0;
74}
75

source code of libcxx/test/std/experimental/simd/simd.reference/reference_swap.pass.cpp