160 lines
5.3 KiB
C++
160 lines
5.3 KiB
C++
/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 3.0
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// Copyright (2020) National Technology & Engineering
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// Solutions of Sandia, LLC (NTESS).
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#include <Kokkos_Core.hpp>
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#if defined(KOKKOS_COMPILER_INTEL) && (KOKKOS_COMPILER_INTEL < 1800)
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namespace {
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// error: expression must have a constant value
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// std::enable_if_t<!has_deprecated_cuda_impl_initialize_v<T>>
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constexpr bool
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test_compiler_upgrade_needed_for_detection_idiom_and_variable_template() {
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return true;
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}
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static_assert(
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test_compiler_upgrade_needed_for_detection_idiom_and_variable_template(),
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"Intel C++ compiler is awesome");
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} // namespace
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#else
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// The purpose of this compile-only test is twofold:
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// 1. mimic Legion's use of Kokkos implementation details for initializing the
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// exectution environment
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// 2. demonstrate how to leverage SFINAE to support Kokkos version through the
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// ExecutionSpace::impl_initialize breaking change before release 3.7
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namespace {
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#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, "") // FIXME C++17
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#ifdef KOKKOS_ENABLE_CUDA
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template <class T>
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using deprecated_cuda_impl_initialize_t =
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decltype(T::impl_initialize(typename T::SelectDevice(0), 1));
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template <class T>
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constexpr bool has_deprecated_cuda_impl_initialize_v =
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Kokkos::is_detected<deprecated_cuda_impl_initialize_t, T>::value;
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template <class T>
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std::enable_if_t<has_deprecated_cuda_impl_initialize_v<T> >
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legion_initialize_kokkos_cuda() {
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int cuda_device_id = 0;
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int num_instances = 1;
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T::impl_initialize(typename T::SelectDevice(cuda_device_id), num_instances);
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}
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template <class T>
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std::enable_if_t<!has_deprecated_cuda_impl_initialize_v<T> >
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legion_initialize_kokkos_cuda() {
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int cuda_device_id = 0;
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auto const settings =
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Kokkos::InitializationSettings().set_device_id(cuda_device_id);
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T::impl_initialize(settings);
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}
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STATIC_ASSERT(std::is_void<
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decltype(legion_initialize_kokkos_cuda<Kokkos::Cuda>())>::value);
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#endif
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#ifdef KOKKOS_ENABLE_OPENMP
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template <class T>
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using deprecated_openmp_impl_initialize_t = decltype(T::impl_initialize(0));
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template <class T>
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constexpr bool has_deprecated_openmp_impl_initialize_v =
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Kokkos::is_detected<deprecated_openmp_impl_initialize_t, T>::value;
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template <class T>
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std::enable_if_t<has_deprecated_openmp_impl_initialize_v<T> >
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legion_initialize_kokkos_openmp() {
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int thread_count = -1;
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T::impl_initialize(thread_count);
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}
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template <class T>
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std::enable_if_t<!has_deprecated_openmp_impl_initialize_v<T> >
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legion_initialize_kokkos_openmp() {
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int thread_count = -1;
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auto const settings =
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Kokkos::InitializationSettings().set_num_threads(thread_count);
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T::impl_initialize(settings);
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}
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STATIC_ASSERT(std::is_void<decltype(
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legion_initialize_kokkos_openmp<Kokkos::OpenMP>())>::value);
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#endif
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#ifdef KOKKOS_ENABLE_SERIAL
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template <class T>
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using deprecated_serial_impl_initialize_t = decltype(T::impl_initialize());
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template <class T>
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constexpr bool has_deprecated_serial_impl_initialize_v =
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Kokkos::is_detected<deprecated_serial_impl_initialize_t, T>::value;
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template <class T>
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std::enable_if_t<has_deprecated_serial_impl_initialize_v<T> >
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legion_initialize_kokkos_serial() {
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T::impl_initialize();
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}
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template <class T>
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std::enable_if_t<!has_deprecated_serial_impl_initialize_v<T> >
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legion_initialize_kokkos_serial() {
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Kokkos::InitializationSettings settings;
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T::impl_initialize(settings);
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}
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STATIC_ASSERT(std::is_void<decltype(
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legion_initialize_kokkos_serial<Kokkos::Serial>())>::value);
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#endif
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} // namespace
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#endif
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