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lammps/lib/kokkos/algorithms/unit_tests/TestStdAlgorithmsFindFirstOf.cpp
2022-05-05 11:44:47 -06:00

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// Kokkos v. 3.0
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#include <TestStdAlgorithmsCommon.hpp>
#include <std_algorithms/Kokkos_BeginEnd.hpp>
#include <std_algorithms/Kokkos_ModifyingSequenceOperations.hpp>
#include <utility>
namespace Test {
namespace stdalgos {
namespace FindFirstOf {
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(-100, 100) { m_gen.seed(1034343); }
UnifDist(int a, int b) : m_dist(a, b) { m_gen.seed(514343); }
int 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 == "three-elements-a") {
v_h(0) = static_cast<value_type>(-1);
v_h(1) = static_cast<value_type>(2);
v_h(2) = static_cast<value_type>(3);
}
else if (name == "three-elements-b") {
v_h(0) = static_cast<value_type>(3);
v_h(1) = static_cast<value_type>(1);
v_h(2) = static_cast<value_type>(-4);
}
else if (name == "four-elements-a") {
v_h(0) = static_cast<value_type>(-1);
v_h(1) = static_cast<value_type>(2);
v_h(2) = static_cast<value_type>(2);
v_h(3) = static_cast<value_type>(4);
}
else if (name == "four-elements-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>(1);
}
else if (name == "small-a") {
v_h(0) = static_cast<value_type>(0);
v_h(1) = static_cast<value_type>(4);
v_h(2) = static_cast<value_type>(1);
v_h(3) = static_cast<value_type>(2);
v_h(4) = static_cast<value_type>(-1);
v_h(5) = static_cast<value_type>(4);
v_h(6) = static_cast<value_type>(1);
v_h(7) = static_cast<value_type>(2);
v_h(8) = static_cast<value_type>(2);
v_h(9) = static_cast<value_type>(4);
v_h(10) = static_cast<value_type>(1);
}
else if (name == "small-b") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(2);
v_h(2) = static_cast<value_type>(3);
v_h(3) = static_cast<value_type>(1);
v_h(4) = static_cast<value_type>(-1);
v_h(5) = static_cast<value_type>(-2);
v_h(6) = static_cast<value_type>(0);
v_h(7) = static_cast<value_type>(1);
v_h(8) = static_cast<value_type>(2);
v_h(9) = static_cast<value_type>(2);
v_h(10) = static_cast<value_type>(5);
v_h(11) = static_cast<value_type>(9);
v_h(12) = static_cast<value_type>(8);
}
else {
UnifDist<value_type> randObj;
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
}
}
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 ViewType>
auto create_seq_for_find_first_of(ViewType data_view, std::size_t seq_extent) {
(void)data_view;
using value_type = typename ViewType::value_type;
using exe_space = typename ViewType::execution_space;
using seq_view_t = Kokkos::View<value_type*, exe_space>;
seq_view_t seq_view("seq_view", seq_extent);
auto seq_view_h = create_mirror_view(Kokkos::HostSpace(), seq_view);
UnifDist<value_type> randObj(-10, -10);
for (std::size_t i = 0; i < seq_extent; ++i) {
seq_view_h(i) = randObj();
}
Kokkos::deep_copy(seq_view, seq_view_h);
return seq_view;
}
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 seq_ext) {
std::cout << "find_first_of: default predicate: " << name << ", "
<< "seach_seq_ext = " << seq_ext << ", "
<< view_tag_to_string(Tag{}) << " "
<< value_type_to_string(ValueType()) << std::endl;
}
template <class Tag, class ValueType, class Predicate>
void print_scenario_details(const std::string& name, std::size_t seq_ext,
Predicate pred) {
(void)pred;
std::cout << "find_first_of: custom predicate: " << name << ", "
<< "seach_seq_ext = " << seq_ext << ", "
<< view_tag_to_string(Tag{}) << " "
<< value_type_to_string(ValueType()) << std::endl;
}
template <class Tag, class ValueType, class InfoType, class... Args>
void run_single_scenario(const InfoType& scenario_info, std::size_t seq_ext,
Args... args) {
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, seq_ext, args...);
auto view =
create_view<ValueType>(Tag{}, view_ext, "find_first_of_test_view");
fill_view(view, name);
auto s_view = create_seq_for_find_first_of(view, seq_ext);
// run std
auto view_h = create_host_space_copy(view);
auto s_view_h = create_host_space_copy(s_view);
auto stdrit =
std::find_first_of(KE::cbegin(view_h), KE::cend(view_h),
KE::cbegin(s_view_h), KE::cend(s_view_h), args...);
{
auto myrit =
KE::find_first_of(exespace(), KE::cbegin(view), KE::cend(view),
KE::cbegin(s_view), KE::cend(s_view), args...);
const auto mydiff = myrit - KE::cbegin(view);
const auto stddiff = stdrit - KE::cbegin(view_h);
EXPECT_TRUE(mydiff == stddiff);
}
{
auto myrit =
KE::find_first_of("label", exespace(), KE::cbegin(view), KE::cend(view),
KE::cbegin(s_view), KE::cend(s_view), args...);
const auto mydiff = myrit - KE::cbegin(view);
const auto stddiff = stdrit - KE::cbegin(view_h);
EXPECT_TRUE(mydiff == stddiff);
}
{
auto myrit = KE::find_first_of(exespace(), view, s_view, args...);
const auto mydiff = myrit - KE::begin(view);
const auto stddiff = stdrit - KE::cbegin(view_h);
EXPECT_TRUE(mydiff == stddiff);
}
{
auto myrit = KE::find_first_of("label", exespace(), view, s_view, args...);
const auto mydiff = myrit - KE::begin(view);
const auto stddiff = stdrit - KE::cbegin(view_h);
EXPECT_TRUE(mydiff == stddiff);
}
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},
{"three-elements-a", 3},
{"three-elements-b", 3},
{"four-elements-a", 4},
{"four-elements-b", 4},
{"small-a", 11},
{"small-b", 13},
{"medium-a", 11103},
{"medium-b", 21103},
{"large-a", 101513},
{"large-b", 100111}};
const std::vector<std::size_t> seq_extents = {0, 1, 2, 3, 4, 5, 8,
11, 20, 31, 113, 523, 1035};
// for each scenario we want to run "find_first_of"
// for a set of sequences of various extents
for (const auto& it : scenarios) {
for (const auto& it2 : seq_extents) {
run_single_scenario<Tag, ValueType>(it, it2);
using func_t = IsEqualFunctor<ValueType>;
run_single_scenario<Tag, ValueType>(it, it2, func_t());
}
}
}
TEST(std_algorithms_non_mod_seq_ops, find_first_of) {
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
}
} // namespace FindFirstOf
} // namespace stdalgos
} // namespace Test