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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#include <TestStdAlgorithmsCommon.hpp>
#include <utility>
#include <algorithm>
namespace Test {
namespace stdalgos {
namespace RotateCopy {
namespace KE = Kokkos::Experimental;
template <class ValueType>
struct UnifDist;
template <>
struct UnifDist<int> {
using dist_type = std::uniform_int_distribution<int>;
std::mt19937 m_gen;
dist_type m_dist;
UnifDist() : m_dist(-50, 50) { m_gen.seed(1034343); }
int operator()() { return m_dist(m_gen); }
};
template <>
struct UnifDist<double> {
using dist_type = std::uniform_real_distribution<double>;
std::mt19937 m_gen;
dist_type m_dist;
UnifDist() : m_dist(-90., 100.) { m_gen.seed(1034343); }
double operator()() { return m_dist(m_gen); }
};
template <class ViewType>
void fill_view(ViewType dest_view, const std::string& name) {
using value_type = typename ViewType::value_type;
using exe_space = typename ViewType::execution_space;
const std::size_t ext = dest_view.extent(0);
using aux_view_t = Kokkos::View<value_type*, exe_space>;
aux_view_t aux_view("aux_view", ext);
auto v_h = create_mirror_view(Kokkos::HostSpace(), aux_view);
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
v_h(0) = static_cast<value_type>(1);
}
else if (name == "one-element-b") {
v_h(0) = static_cast<value_type>(2);
}
else if (name == "two-elements-a") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(2);
}
else if (name == "two-elements-b") {
v_h(0) = static_cast<value_type>(2);
v_h(1) = static_cast<value_type>(-1);
}
else if (name == "small-a") {
v_h(0) = static_cast<value_type>(0);
v_h(1) = static_cast<value_type>(1);
v_h(2) = static_cast<value_type>(1);
v_h(3) = static_cast<value_type>(2);
v_h(4) = static_cast<value_type>(3);
v_h(5) = static_cast<value_type>(4);
v_h(6) = static_cast<value_type>(4);
v_h(7) = static_cast<value_type>(4);
v_h(8) = static_cast<value_type>(5);
v_h(9) = static_cast<value_type>(6);
v_h(10) = static_cast<value_type>(6);
}
else if (name == "small-b") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(1);
v_h(2) = static_cast<value_type>(1);
v_h(3) = static_cast<value_type>(2);
v_h(4) = static_cast<value_type>(3);
v_h(5) = static_cast<value_type>(4);
v_h(6) = static_cast<value_type>(4);
v_h(7) = static_cast<value_type>(4);
v_h(8) = static_cast<value_type>(5);
v_h(9) = static_cast<value_type>(6);
v_h(10) = static_cast<value_type>(8);
v_h(11) = static_cast<value_type>(9);
v_h(12) = static_cast<value_type>(8);
}
else if (name == "medium" || name == "large") {
UnifDist<value_type> randObj;
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
}
}
else {
FAIL() << "invalid choice";
}
Kokkos::deep_copy(aux_view, v_h);
CopyFunctor<aux_view_t, ViewType> F1(aux_view, dest_view);
Kokkos::parallel_for("copy", dest_view.extent(0), F1);
}
template <class ViewTypeFrom, class ViewTypeTest>
void verify_data(ViewTypeFrom view_from, ViewTypeTest view_test,
std::size_t rotation_point) {
auto view_from_h = create_host_space_copy(view_from);
auto view_test_h = create_host_space_copy(view_test);
const std::size_t ext = view_test_h.extent(0);
using value_type = typename ViewTypeTest::value_type;
std::vector<value_type> std_gold_h(ext);
auto first_n = KE::cbegin(view_from_h) + rotation_point;
std::rotate_copy(KE::cbegin(view_from_h), first_n, KE::cend(view_from_h),
std_gold_h.begin());
for (std::size_t i = 0; i < ext; ++i) {
ASSERT_EQ(view_test_h(i), std_gold_h[i]);
// std::cout << "i= " << i << " "
// << "from: " << view_from_h(i) << " "
// << "mine: " << view_test_h(i) << " "
// << "std: " << std_gold_h[i]
// << '\n';
}
}
std::string value_type_to_string(int) { return "int"; }
std::string value_type_to_string(double) { return "double"; }
template <class Tag, class ValueType>
void print_scenario_details(const std::string& name,
std::size_t rotation_point) {
std::cout << "rotate_copy: "
<< " at " << rotation_point << ", " << name << ", "
<< view_tag_to_string(Tag{}) << ", "
<< value_type_to_string(ValueType()) << std::endl;
}
template <class Tag, class ValueType, class InfoType>
void run_single_scenario(const InfoType& scenario_info,
std::size_t rotation_point) {
const auto name = std::get<0>(scenario_info);
const std::size_t view_ext = std::get<1>(scenario_info);
// print_scenario_details<Tag, ValueType>(name, rotation_point);
auto view_from = create_view<ValueType>(Tag{}, view_ext, "rotate_copy_from");
fill_view(view_from, name);
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "rotate_copy_dest");
auto n_it = KE::cbegin(view_from) + rotation_point;
auto rit = KE::rotate_copy(exespace(), KE::cbegin(view_from), n_it,
KE::cend(view_from), KE::begin(view_dest));
verify_data(view_from, view_dest, rotation_point);
ASSERT_EQ(rit, (KE::begin(view_dest) + view_ext));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "rotate_copy_dest");
auto n_it = KE::cbegin(view_from) + rotation_point;
auto rit = KE::rotate_copy("label", exespace(), KE::cbegin(view_from), n_it,
KE::cend(view_from), KE::begin(view_dest));
verify_data(view_from, view_dest, rotation_point);
ASSERT_EQ(rit, (KE::begin(view_dest) + view_ext));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "rotate_copy_dest");
auto rit =
KE::rotate_copy(exespace(), view_from, rotation_point, view_dest);
verify_data(view_from, view_dest, rotation_point);
ASSERT_EQ(rit, (KE::begin(view_dest) + view_ext));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "rotate_copy_dest");
auto rit = KE::rotate_copy("label", exespace(), view_from, rotation_point,
view_dest);
verify_data(view_from, view_dest, rotation_point);
ASSERT_EQ(rit, (KE::begin(view_dest) + view_ext));
}
Kokkos::fence();
}
template <class Tag, class ValueType>
void run_all_scenarios() {
const std::map<std::string, std::size_t> scenarios = {
{"empty", 0}, {"one-element-a", 1}, {"one-element-b", 1},
{"two-elements-a", 2}, {"two-elements-b", 2}, {"small-a", 11},
{"small-b", 13}, {"medium", 21103}, {"large", 101513}};
std::vector<std::size_t> rotation_points = {0, 1, 2, 3, 8,
56, 101, 1003, 101501};
for (const auto& it : scenarios) {
for (const auto& it2 : rotation_points) {
// for each view scenario, we rotate at multiple points
// but only if the view has an extent that is >= rotation point
const auto view_ext = it.second;
if (view_ext >= it2) {
run_single_scenario<Tag, ValueType>(it, it2);
}
}
}
}
TEST(std_algorithms_mod_seq_ops, rotate_copy) {
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
run_all_scenarios<DynamicTag, double>();
run_all_scenarios<StridedThreeTag, double>();
}
} // namespace RotateCopy
} // namespace stdalgos
} // namespace Test
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