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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 ReplaceIf {
namespace KE = Kokkos::Experimental;
template <class ValueType>
struct UnifDist;
template <>
struct UnifDist<double> {
using dist_type = std::uniform_real_distribution<double>;
std::mt19937 m_gen;
dist_type m_dist;
UnifDist() : m_dist(-20., 20.) { m_gen.seed(1034343); }
double operator()() { return m_dist(m_gen); }
};
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>
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);
UnifDist<value_type> randObj;
if (name == "empty") {
// no op
}
else if (name == "one-element") {
v_h(0) = static_cast<value_type>(1);
}
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") {
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = value_type{-5} + static_cast<value_type>(i + 1);
}
}
else if (name == "small-b") {
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
}
v_h(5) = static_cast<value_type>(-2);
}
else if (name == "medium" || name == "large") {
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);
}
// my own because std::replace_if is ONLY found with std=c++20
template <class ForwardIt, class UnaryPredicate, class T>
void my_host_replace_if(ForwardIt first, ForwardIt last, UnaryPredicate p,
const T& new_value) {
for (; first != last; ++first) {
if (p(*first)) {
*first = new_value;
}
}
}
template <class ViewType1, class ViewType2, class ValueType,
class PredicateType>
void verify_data(ViewType1 data_view, // contains data
ViewType2 test_view, // the view to test
ValueType new_value, PredicateType pred) {
//! always careful because views might not be deep copyable
auto data_view_dc = create_deep_copyable_compatible_clone(data_view);
auto data_view_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), data_view_dc);
my_host_replace_if(KE::begin(data_view_h), KE::end(data_view_h), pred,
new_value);
auto test_view_dc = create_deep_copyable_compatible_clone(test_view);
auto test_view_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), test_view_dc);
if (test_view_h.extent(0) > 0) {
for (std::size_t i = 0; i < test_view_h.extent(0); ++i) {
// std::cout << i << " " << std::setprecision(15)
// << data_view_dc(i) << " "
// << data_view_h(i) << " "
// << test_view_h(i) << std::endl;
ASSERT_EQ(data_view_h(i), test_view_h(i));
}
}
}
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, class PredicateType>
void run_single_scenario(const InfoType& scenario_info, PredicateType pred) {
const auto name = std::get<0>(scenario_info);
const std::size_t view_ext = std::get<1>(scenario_info);
// std::cout << "replace_if: " << name << ", " << view_tag_to_string(Tag{})
// << ", " << value_type_to_string(ValueType()) << std::endl;
ValueType new_value{23};
auto view_with_data =
create_view<ValueType>(Tag{}, view_ext, "replace_if_v2");
auto view_to_test = create_view<ValueType>(Tag{}, view_ext, "replace_if_v1");
fill_view(view_with_data, name);
{
CopyFunctor<decltype(view_with_data), decltype(view_to_test)> F1(
view_with_data, view_to_test);
Kokkos::parallel_for("copy", view_to_test.extent(0), F1);
KE::replace_if(exespace(), KE::begin(view_to_test), KE::end(view_to_test),
pred, new_value);
verify_data(view_with_data, view_to_test, new_value, pred);
}
{
CopyFunctor<decltype(view_with_data), decltype(view_to_test)> F1(
view_with_data, view_to_test);
Kokkos::parallel_for("copy", view_to_test.extent(0), F1);
KE::replace_if("label", exespace(), KE::begin(view_to_test),
KE::end(view_to_test), pred, new_value);
verify_data(view_with_data, view_to_test, new_value, pred);
}
{
CopyFunctor<decltype(view_with_data), decltype(view_to_test)> F1(
view_with_data, view_to_test);
Kokkos::parallel_for("copy", view_to_test.extent(0), F1);
KE::replace_if(exespace(), view_to_test, pred, new_value);
verify_data(view_with_data, view_to_test, new_value, pred);
}
{
CopyFunctor<decltype(view_with_data), decltype(view_to_test)> F1(
view_with_data, view_to_test);
Kokkos::parallel_for("copy", view_to_test.extent(0), F1);
KE::replace_if("label", exespace(), view_to_test, pred, new_value);
verify_data(view_with_data, view_to_test, new_value, pred);
}
Kokkos::fence();
}
template <class Tag, class ValueType>
void run_all_scenarios() {
const std::map<std::string, std::size_t> scenarios = {
{"empty", 0}, {"one-element", 1}, {"two-elements-a", 2},
{"two-elements-b", 2}, {"small-a", 9}, {"small-b", 13},
{"medium", 1103}, {"large", 101513}};
for (const auto& it : scenarios) {
using pred_p_t = IsPositiveFunctor<ValueType>;
run_single_scenario<Tag, ValueType>(it, pred_p_t{});
using pred_n_t = IsNegativeFunctor<ValueType>;
run_single_scenario<Tag, ValueType>(it, pred_n_t{});
}
}
TEST(std_algorithms_replace_ops_test, replace_if) {
run_all_scenarios<DynamicTag, double>();
run_all_scenarios<StridedThreeTag, double>();
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
}
} // namespace ReplaceIf
} // namespace stdalgos
} // namespace Test
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