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forall.hpp
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forall.hpp
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//
// Copyright (c) 2016-21, Lawrence Livermore National Security, LLC
// and RAJA project contributors. See the RAJA/LICENSE file for details.
//
// SPDX-License-Identifier: (BSD-3-Clause)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//
#ifndef RAJA_forall_param_openmp_HPP
#define RAJA_forall_param_openmp_HPP
#define RAJA_OMP_DECLARE_REDUCTION_COMBINE \
_Pragma(" omp declare reduction( combine \
: typename std::remove_reference<decltype(f_params)>::type \
: RAJA::expt::ParamMultiplexer::combine<EXEC_POL>(omp_out, omp_in) ) ")\
//initializer(omp_priv = omp_in) ")
namespace RAJA
{
namespace policy
{
namespace omp
{
namespace expt
{
namespace internal
{
//
// omp for (Auto)
//
template <typename ExecPol, typename Iterable, typename Func, typename ForallParam>
RAJA_INLINE
concepts::enable_if< std::is_same<ExecPol, RAJA::policy::omp::Auto> >
forall_impl(const ExecPol& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(static)
//
template <template<int> class ExecPol, typename Iterable, typename Func, int ChunkSize, typename ForallParam>
RAJA_INLINE
concepts::enable_if< std::is_same<ExecPol<ChunkSize>, RAJA::policy::omp::Static<ChunkSize>>,
std::integral_constant<bool,(ChunkSize <= 0)> >
forall_impl(const ExecPol<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(static) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(static, ChunkSize)
//
template <template<int> class ExecPol, typename Iterable, typename Func, int ChunkSize, typename ForallParam>
RAJA_INLINE
concepts::enable_if< std::is_same<ExecPol<ChunkSize>, RAJA::policy::omp::Static<ChunkSize>>,
std::integral_constant<bool,(ChunkSize > 0)> >
forall_impl(const ExecPol<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(static, ChunkSize) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(runtime)
//
template <typename Iterable, typename Func, typename ForallParam>
RAJA_INLINE void forall_impl(const ::RAJA::policy::omp::Runtime& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(runtime) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for nowait (Auto)
//
template <typename Iterable, typename Func, typename ForallParam>
RAJA_INLINE void forall_impl_nowait(const ::RAJA::policy::omp::Auto& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel
{
#pragma omp for nowait reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(dynamic)
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize <= 0)>::type* = nullptr>
RAJA_INLINE void forall_impl(const ::RAJA::policy::omp::Dynamic<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(dynamic) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(dynamic, ChunkSize)
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize > 0)>::type* = nullptr>
RAJA_INLINE void forall_impl(const ::RAJA::policy::omp::Dynamic<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(dynamic, ChunkSize) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(guided)
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize <= 0)>::type* = nullptr>
RAJA_INLINE void forall_impl(const ::RAJA::policy::omp::Guided<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(guided) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(guided, ChunkSize)
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize > 0)>::type* = nullptr>
RAJA_INLINE void forall_impl(const ::RAJA::policy::omp::Guided<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel for schedule(guided, ChunkSize) reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(static) nowait
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize <= 0)>::type* = nullptr>
RAJA_INLINE void forall_impl_nowait(const ::RAJA::policy::omp::Static<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel
{
#pragma omp for schedule(static) nowait reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
//
// omp for schedule(static, ChunkSize) nowait
//
template <typename Iterable, typename Func, int ChunkSize, typename ForallParam,
typename std::enable_if<(ChunkSize > 0)>::type* = nullptr>
RAJA_INLINE void forall_impl_nowait(const ::RAJA::policy::omp::Static<ChunkSize>& p,
Iterable&& iter,
Func&& loop_body,
ForallParam&& f_params)
{
using EXEC_POL = typename std::decay<decltype(p)>::type;
RAJA::expt::ParamMultiplexer::init<EXEC_POL>(f_params);
RAJA_OMP_DECLARE_REDUCTION_COMBINE;
RAJA_EXTRACT_BED_IT(iter);
#pragma omp parallel
{
#pragma omp for schedule(static, ChunkSize) nowait reduction(combine : f_params)
for (decltype(distance_it) i = 0; i < distance_it; ++i) {
RAJA::expt::invoke_body(f_params, loop_body, begin_it[i]);
}
}
RAJA::expt::ParamMultiplexer::resolve<EXEC_POL>(f_params);
}
} // namespace internal
template <typename Schedule, typename Iterable, typename Func, typename ForallParam>
RAJA_INLINE resources::EventProxy<resources::Host> forall_impl(resources::Host host_res,
const omp_for_schedule_exec<Schedule>&,
Iterable&& iter,
Func&& loop_body,
ForallParam f_params)
{
expt::internal::forall_impl(Schedule{}, std::forward<Iterable>(iter), std::forward<Func>(loop_body), std::forward<ForallParam>(f_params));
return resources::EventProxy<resources::Host>(host_res);
}
} // namespace expt
///
/// OpenMP parallel policy implementation
///
template <typename Iterable, typename Func, typename InnerPolicy, typename ForallParam>
RAJA_INLINE
concepts::enable_if_t<
resources::EventProxy<resources::Host>,
RAJA::expt::type_traits::is_ForallParamPack<ForallParam>,
concepts::negate<RAJA::expt::type_traits::is_ForallParamPack_empty<ForallParam>>>
forall_impl(resources::Host host_res,
const omp_parallel_exec<InnerPolicy>&,
Iterable&& iter,
Func&& loop_body,
ForallParam f_params)
{
expt::forall_impl(host_res, InnerPolicy{}, iter, loop_body, f_params);
return resources::EventProxy<resources::Host>(host_res);
}
} // namespace omp
} // namespace policy
} // namespace RAJA
#endif // closing endif for header file include guard