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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>
namespace Test {
namespace stdalgos {
namespace CopyIf {
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); }
int operator()() { return m_dist(m_gen); }
};
template <class ViewType, class PredicateType>
std::size_t fill_view(ViewType dest_view, const std::string& name,
PredicateType pred) {
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);
std::size_t count = 0;
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
v_h(0) = static_cast<value_type>(1);
// 1 is not even, so count is not incremented
}
else if (name == "one-element-b") {
v_h(0) = static_cast<value_type>(2);
count++;
}
else if (name == "two-elements-a") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(2);
count++;
}
else if (name == "two-elements-b") {
v_h(0) = static_cast<value_type>(2);
v_h(1) = static_cast<value_type>(-1);
count++;
}
else if (name == "small-a") {
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = value_type{-5} + static_cast<value_type>(i + 1);
if (pred(v_h(i))) {
count++;
}
}
}
else if (name == "small-b") {
for (std::size_t i = 0; i < ext; ++i) {
if (i % 2 == 0) {
v_h(i) = static_cast<value_type>(22);
} else {
v_h(i) = static_cast<value_type>(-12);
}
if (pred(v_h(i))) {
count++;
}
}
}
else if (name == "medium" || name == "large") {
UnifDist<value_type> randObj;
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
if (pred(v_h(i))) {
count++;
}
}
}
else {
Kokkos::abort("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);
return count;
}
template <class ViewTypeFrom, class ViewTypeTest, class PredType>
void verify_data(const std::string& name, ViewTypeFrom view_from,
ViewTypeTest view_test, PredType pred) {
using value_type = typename ViewTypeTest::value_type;
//! always careful because views might not be deep copyable
auto view_test_dc = create_deep_copyable_compatible_clone(view_test);
auto view_test_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), view_test_dc);
auto view_from_dc = create_deep_copyable_compatible_clone(view_from);
auto view_from_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), view_from_dc);
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(0));
}
else if (name == "one-element-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(2));
}
else if (name == "two-elements-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(0));
}
else if (name == "two-elements-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(0));
}
else if (name == "small-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(-4));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(-2));
ASSERT_EQ(view_test_h(2), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(3), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(4), static_cast<value_type>(4));
ASSERT_EQ(view_test_h(5), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(6), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(7), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(8), static_cast<value_type>(0));
}
else if (name == "small-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(2), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(3), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(4), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(5), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(6), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(7), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(8), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(9), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(10), static_cast<value_type>(22));
ASSERT_EQ(view_test_h(11), static_cast<value_type>(-12));
ASSERT_EQ(view_test_h(12), static_cast<value_type>(22));
}
else if (name == "medium" || name == "large") {
// for (std::size_t i = 0; i < view_from_h.extent(0); ++i){
// std::cout << "i= " << i << " "
// << " vf = " << view_from_h(i) << " "
// << " vt = " << view_test_h(i) << '\n';
// }
std::size_t count = 0;
for (std::size_t i = 0; i < view_from_h.extent(0); ++i) {
if (pred(view_from_h(i))) {
ASSERT_EQ(view_test_h(count), view_from_h(i));
count++;
}
}
// all other entries of test view should be zero
for (; count < view_test_h.extent(0); ++count) {
// std::cout << count << '\n';
ASSERT_EQ(view_test_h(count), value_type(0));
}
}
else {
FAIL() << "invalid choice";
}
}
std::string value_type_to_string(int) { return "int"; }
std::string value_type_to_string(double) { return "double"; }
template <class Tag, class ValueType, class InfoType>
void run_single_scenario(const InfoType& scenario_info) {
const auto name = std::get<0>(scenario_info);
const std::size_t view_ext = std::get<1>(scenario_info);
// std::cout << "copy_if: " << name << ", " << view_tag_to_string(Tag{}) << ",
// "
// << value_type_to_string(ValueType()) << std::endl;
auto view_from = create_view<ValueType>(Tag{}, view_ext, "copy_if_from");
IsEvenFunctor<ValueType> pred;
{
auto n = fill_view(view_from, name, pred);
auto view_dest = create_view<ValueType>(Tag{}, view_ext, "copy_if_dest");
auto rit = KE::copy_if(exespace(), KE::cbegin(view_from),
KE::cend(view_from), KE::begin(view_dest), pred);
verify_data(name, view_from, view_dest, pred);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto n = fill_view(view_from, name, pred);
auto view_dest = create_view<ValueType>(Tag{}, view_ext, "copy_if_dest");
auto rit = KE::copy_if("label", exespace(), KE::cbegin(view_from),
KE::cend(view_from), KE::begin(view_dest), pred);
verify_data(name, view_from, view_dest, pred);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto n = fill_view(view_from, name, pred);
auto view_dest = create_view<ValueType>(Tag{}, view_ext, "copy_if_dest");
auto rit = KE::copy_if(exespace(), view_from, view_dest, pred);
verify_data(name, view_from, view_dest, pred);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto n = fill_view(view_from, name, pred);
auto view_dest = create_view<ValueType>(Tag{}, view_ext, "copy_if_dest");
auto rit = KE::copy_if("label", exespace(), view_from, view_dest, pred);
verify_data(name, view_from, view_dest, pred);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
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", 9},
{"small-b", 13}, {"medium", 1103}, {"large", 101513}};
for (const auto& it : scenarios) {
run_single_scenario<Tag, ValueType>(it);
}
}
TEST(std_algorithms_mod_seq_ops, copy_if) {
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
}
} // namespace CopyIf
} // namespace stdalgos
} // namespace Test
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