forked from OSchip/llvm-project
145 lines
4.3 KiB
C++
145 lines
4.3 KiB
C++
// -*- C++ -*-
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//===-- test_rotate_copy.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "pstl_test_config.h"
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#include <iterator>
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#include "pstl/execution"
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#include "pstl/algorithm"
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#include "utils.h"
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using namespace TestUtils;
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template <typename T>
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struct wrapper;
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template <typename T>
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bool
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compare(const wrapper<T>& a, const wrapper<T>& b)
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{
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return a.t == b.t;
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}
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template <typename T>
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bool
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compare(const T& a, const T& b)
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{
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return a == b;
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}
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template <typename T>
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struct wrapper
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{
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explicit wrapper(T t_) : t(t_) {}
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wrapper&
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operator=(const T& t_)
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{
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t = t_;
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return *this;
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}
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friend bool
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compare<T>(const wrapper<T>& a, const wrapper<T>& b);
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private:
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T t;
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};
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template <typename T, typename It1, typename It2>
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struct comparator
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{
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using T1 = typename std::iterator_traits<It1>::value_type;
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using T2 = typename std::iterator_traits<It2>::value_type;
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bool
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operator()(T1 a, T2 b)
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{
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T temp = a;
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return compare(temp, b);
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}
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};
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struct test_one_policy
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{
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#if __PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN || \
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__PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN // dummy specialization by policy type, in case of broken configuration
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template <typename Iterator1, typename Iterator2>
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typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
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operator()(pstl::execution::unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
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Iterator2 actual_e, std::size_t shift)
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{
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}
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template <typename Iterator1, typename Iterator2>
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typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
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operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
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Iterator2 actual_e, std::size_t shift)
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{
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}
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#endif
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template <typename ExecutionPolicy, typename Iterator1, typename Iterator2>
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void
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operator()(ExecutionPolicy&& exec, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, Iterator2 actual_e,
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std::size_t shift)
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{
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using namespace std;
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using T = typename iterator_traits<Iterator2>::value_type;
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Iterator1 data_m = std::next(data_b, shift);
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fill(actual_b, actual_e, T(-123));
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Iterator2 actual_return = rotate_copy(exec, data_b, data_m, data_e, actual_b);
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EXPECT_TRUE(actual_return == actual_e, "wrong result of rotate_copy");
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auto comparer = comparator<T, Iterator1, Iterator2>();
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bool check = std::equal(data_m, data_e, actual_b, comparer);
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check = check && std::equal(data_b, data_m, std::next(actual_b, std::distance(data_m, data_e)), comparer);
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EXPECT_TRUE(check, "wrong effect of rotate_copy");
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}
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};
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template <typename T1, typename T2>
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void
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test()
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{
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const std::size_t max_len = 100000;
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Sequence<T2> actual(max_len, [](std::size_t i) { return T1(i); });
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Sequence<T1> data(max_len, [](std::size_t i) { return T1(i); });
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for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len))
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{
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std::size_t shifts[] = {0, 1, 2, len / 3, (2 * len) / 3, len - 1};
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for (std::size_t shift : shifts)
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{
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if (shift > 0 && shift < len)
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{
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invoke_on_all_policies(test_one_policy(), data.begin(), data.begin() + len, actual.begin(),
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actual.begin() + len, shift);
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invoke_on_all_policies(test_one_policy(), data.cbegin(), data.cbegin() + len, actual.begin(),
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actual.begin() + len, shift);
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}
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}
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}
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}
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int32_t
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main()
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{
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test<int32_t, int8_t>();
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test<uint16_t, float32_t>();
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test<float64_t, int64_t>();
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test<wrapper<float64_t>, wrapper<float64_t>>();
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std::cout << done() << std::endl;
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return 0;
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}
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