Update Kokkos library in LAMMPS to v4.2

lib/kokkos/algorithms/unit_tests/TestStdAlgorithmsTeamForEachN.cpp

@@ -0,0 +1,144 @@
+//@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>
+
+namespace Test {
+namespace stdalgos {
+namespace TeamForEachN {
+
+namespace KE = Kokkos::Experimental;
+
+template <class ValueType>
+struct PrefixIncrementFunctor {
+  KOKKOS_INLINE_FUNCTION
+  void operator()(ValueType& val) const { ++val; }
+};
+
+template <class DataViewType, class NViewType, class UnaryPredType>
+struct TestFunctorA {
+  DataViewType m_dataView;
+  NViewType m_nView;
+  int m_apiPick;
+  UnaryPredType m_unaryPred;
+
+  TestFunctorA(const DataViewType dataView, const NViewType nView, int apiPick,
+               UnaryPredType unaryPred)
+      : m_dataView(dataView),
+        m_nView(nView),
+        m_apiPick(apiPick),
+        m_unaryPred(unaryPred) {}
+
+  template <class MemberType>
+  KOKKOS_INLINE_FUNCTION void operator()(const MemberType& member) const {
+    const auto myRowIndex = member.league_rank();
+    const auto n          = m_nView(myRowIndex);
+
+    auto myRowViewFrom = Kokkos::subview(m_dataView, myRowIndex, Kokkos::ALL());
+
+    switch (m_apiPick) {
+      case 0: {
+        KE::for_each_n(member, KE::begin(myRowViewFrom), n, m_unaryPred);
+        break;
+      }
+
+      case 1: {
+        KE::for_each_n(member, myRowViewFrom, n, m_unaryPred);
+        break;
+      }
+    }
+  }
+};
+
+template <class LayoutTag, class ValueType>
+void test_A(std::size_t numTeams, std::size_t numCols, int apiId) {
+  /* description:
+     use a rank-2 view randomly filled with values,
+     and run a team-level for_each_n
+   */
+
+  // -----------------------------------------------
+  // prepare data
+  // -----------------------------------------------
+  // create a view in the memory space associated with default exespace
+  // with as many rows as the number of teams and fill it with random
+  // values from an arbitrary range.
+  constexpr ValueType lowerBound = 5;
+  constexpr ValueType upperBound = 523;
+  const auto bounds              = make_bounds(lowerBound, upperBound);
+
+  auto [dataView, _] = create_random_view_and_host_clone(
+      LayoutTag{}, numTeams, numCols, bounds, "dataView");
+
+  // for_each modifies dataView, so make a separated host copy of if
+  auto dataViewBeforeOp_h = create_host_space_copy(dataView);
+
+  Kokkos::View<std::size_t*> nView("nView", numTeams);
+  auto nView_h = create_host_space_copy(nView);
+  using rand_pool =
+      Kokkos::Random_XorShift64_Pool<Kokkos::DefaultHostExecutionSpace>;
+  rand_pool pool(lowerBound * upperBound);
+  Kokkos::fill_random(nView_h, pool, 0, numCols);
+
+  Kokkos::deep_copy(nView, nView_h);
+
+  // -----------------------------------------------
+  // launch kokkos kernel
+  // -----------------------------------------------
+  using space_t = Kokkos::DefaultExecutionSpace;
+  Kokkos::TeamPolicy<space_t> policy(numTeams, Kokkos::AUTO());
+
+  PrefixIncrementFunctor<ValueType> unaryPred;
+
+  // use CTAD for functor
+  TestFunctorA fnc(dataView, nView, apiId, unaryPred);
+  Kokkos::parallel_for(policy, fnc);
+
+  // -----------------------------------------------
+  // run cpp-std kernel and check
+  // -----------------------------------------------
+  auto dataViewAfterOp_h = create_host_space_copy(dataView);
+  for (std::size_t i = 0; i < dataViewAfterOp_h.extent(0); ++i) {
+    for (std::size_t j = 0, n = 0; j < dataViewAfterOp_h.extent(1); ++j, ++n) {
+      if (n < nView_h(i)) {
+        ASSERT_DOUBLE_EQ(dataViewBeforeOp_h(i, j) + 1, dataViewAfterOp_h(i, j));
+      } else {
+        ASSERT_DOUBLE_EQ(dataViewBeforeOp_h(i, j), dataViewAfterOp_h(i, j));
+      }
+    }
+  }
+}
+
+template <class LayoutTag, class ValueType>
+void run_all_scenarios() {
+  for (int numTeams : teamSizesToTest) {
+    for (const auto& numCols : {1, 2, 13, 101, 1444, 8153}) {
+      for (int apiId : {0, 1}) {
+        test_A<LayoutTag, ValueType>(numTeams, numCols, apiId);
+      }
+    }
+  }
+}
+
+TEST(std_algorithms_for_each_n_team_test, test) {
+  run_all_scenarios<DynamicTag, double>();
+  run_all_scenarios<StridedTwoRowsTag, int>();
+  run_all_scenarios<StridedThreeRowsTag, unsigned>();
+}
+
+}  // namespace TeamForEachN
+}  // namespace stdalgos
+}  // namespace Test