1 // -*- C++ -*-
2 //===-- rotate_copy.pass.cpp ----------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9
10 // UNSUPPORTED: c++03, c++11, c++14
11
12 #include "support/pstl_test_config.h"
13
14 #include <iterator>
15 #include <execution>
16 #include <algorithm>
17
18 #include "support/utils.h"
19
20 using namespace TestUtils;
21
22 template <typename T>
23 struct wrapper;
24
25 template <typename T>
26 bool
compare(const wrapper<T> & a,const wrapper<T> & b)27 compare(const wrapper<T>& a, const wrapper<T>& b)
28 {
29 return a.t == b.t;
30 }
31
32 template <typename T>
33 bool
compare(const T & a,const T & b)34 compare(const T& a, const T& b)
35 {
36 return a == b;
37 }
38
39 template <typename T>
40 struct wrapper
41 {
wrapperwrapper42 explicit wrapper(T t_) : t(t_) {}
43 wrapper&
operator =wrapper44 operator=(const T& t_)
45 {
46 t = t_;
47 return *this;
48 }
49 friend bool
50 compare<T>(const wrapper<T>& a, const wrapper<T>& b);
51
52 private:
53 T t;
54 };
55
56 template <typename T, typename It1, typename It2>
57 struct comparator
58 {
59 using T1 = typename std::iterator_traits<It1>::value_type;
60 using T2 = typename std::iterator_traits<It2>::value_type;
61 bool
operator ()comparator62 operator()(T1 a, T2 b)
63 {
64 T temp = a;
65 return compare(temp, b);
66 }
67 };
68
69 struct test_one_policy
70 {
71
72 #if _PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN || \
73 _PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN // dummy specialization by policy type, in case of broken configuration
74 template <typename Iterator1, typename Iterator2>
75 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
operator ()test_one_policy76 operator()(pstl::execution::unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
77 Iterator2 actual_e, std::size_t shift)
78 {
79 }
80 template <typename Iterator1, typename Iterator2>
81 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
operator ()test_one_policy82 operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
83 Iterator2 actual_e, std::size_t shift)
84 {
85 }
86 #endif
87
88 template <typename ExecutionPolicy, typename Iterator1, typename Iterator2>
89 void
operator ()test_one_policy90 operator()(ExecutionPolicy&& exec, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, Iterator2 actual_e,
91 std::size_t shift)
92 {
93 using namespace std;
94 using T = typename iterator_traits<Iterator2>::value_type;
95 Iterator1 data_m = std::next(data_b, shift);
96
97 fill(actual_b, actual_e, T(-123));
98 Iterator2 actual_return = rotate_copy(exec, data_b, data_m, data_e, actual_b);
99
100 EXPECT_TRUE(actual_return == actual_e, "wrong result of rotate_copy");
101 auto comparer = comparator<T, Iterator1, Iterator2>();
102 bool check = std::equal(data_m, data_e, actual_b, comparer);
103 check = check && std::equal(data_b, data_m, std::next(actual_b, std::distance(data_m, data_e)), comparer);
104
105 EXPECT_TRUE(check, "wrong effect of rotate_copy");
106 }
107 };
108
109 template <typename T1, typename T2>
110 void
test()111 test()
112 {
113
114 const std::size_t max_len = 100000;
115
116 Sequence<T2> actual(max_len, [](std::size_t i) { return T1(i); });
117
118 Sequence<T1> data(max_len, [](std::size_t i) { return T1(i); });
119
120 for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len))
121 {
122 std::size_t shifts[] = {0, 1, 2, len / 3, (2 * len) / 3, len - 1};
123 for (std::size_t shift : shifts)
124 {
125 if (shift > 0 && shift < len)
126 {
127 invoke_on_all_policies(test_one_policy(), data.begin(), data.begin() + len, actual.begin(),
128 actual.begin() + len, shift);
129 invoke_on_all_policies(test_one_policy(), data.cbegin(), data.cbegin() + len, actual.begin(),
130 actual.begin() + len, shift);
131 }
132 }
133 }
134 }
135
136 int
main()137 main()
138 {
139 test<int32_t, int8_t>();
140 test<uint16_t, float32_t>();
141 test<float64_t, int64_t>();
142 test<wrapper<float64_t>, wrapper<float64_t>>();
143
144 std::cout << done() << std::endl;
145 return 0;
146 }
147