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Kokkos_CopyViews.hpp
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Kokkos_CopyViews.hpp
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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
#ifndef KOKKOS_IMPL_PUBLIC_INCLUDE
#include <Kokkos_Macros.hpp>
static_assert(false,
"Including non-public Kokkos header files is not allowed.");
#endif
#ifndef KOKKOS_COPYVIEWS_HPP_
#define KOKKOS_COPYVIEWS_HPP_
#include <string>
#include <sstream>
#include <Kokkos_Parallel.hpp>
#include <KokkosExp_MDRangePolicy.hpp>
#include <Kokkos_Layout.hpp>
#include <impl/Kokkos_HostSpace_ZeroMemset.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
template <class Layout>
struct ViewFillLayoutSelector {};
template <>
struct ViewFillLayoutSelector<Kokkos::LayoutLeft> {
static const Kokkos::Iterate iterate = Kokkos::Iterate::Left;
};
template <>
struct ViewFillLayoutSelector<Kokkos::LayoutRight> {
static const Kokkos::Iterate iterate = Kokkos::Iterate::Right;
};
} // namespace Impl
} // namespace Kokkos
namespace Kokkos {
namespace Impl {
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 0, iType> {
using ST = typename ViewType::non_const_value_type;
ViewFill(const ViewType& a, const ST& val, const ExecSpace& space) {
Kokkos::Impl::DeepCopy<typename ViewType::memory_space, Kokkos::HostSpace,
ExecSpace>(space, a.data(), &val, sizeof(ST));
}
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 1, iType> {
ViewType a;
typename ViewType::const_value_type val;
using policy_type = Kokkos::RangePolicy<ExecSpace, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-1D",
policy_type(space, 0, a.extent(0)), *this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i) const { a(i) = val; };
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 2, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<2, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-2D",
policy_type(space, {0, 0}, {a.extent(0), a.extent(1)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1) const { a(i0, i1) = val; };
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 3, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<3, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for(
"Kokkos::ViewFill-3D",
policy_type(space, {0, 0, 0}, {a.extent(0), a.extent(1), a.extent(2)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2) const {
a(i0, i1, i2) = val;
};
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 4, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<4, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for(
"Kokkos::ViewFill-4D",
policy_type(space, {0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3) const {
a(i0, i1, i2, i3) = val;
};
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 5, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<5, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-5D",
policy_type(space, {0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2),
a.extent(3), a.extent(4)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3, const iType& i4) const {
a(i0, i1, i2, i3, i4) = val;
};
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 6, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<6, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-6D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2),
a.extent(3), a.extent(4), a.extent(5)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3, const iType& i4, const iType& i5) const {
a(i0, i1, i2, i3, i4, i5) = val;
};
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 7, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<6, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-7D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(3),
a.extent(4), a.extent(5), a.extent(6)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i3,
const iType& i4, const iType& i5, const iType& i6) const {
for (iType i2 = 0; i2 < iType(a.extent(2)); i2++)
a(i0, i1, i2, i3, i4, i5, i6) = val;
};
};
template <class ViewType, class Layout, class ExecSpace, typename iType>
struct ViewFill<ViewType, Layout, ExecSpace, 8, iType> {
ViewType a;
typename ViewType::const_value_type val;
using iterate_type = Kokkos::Rank<6, ViewFillLayoutSelector<Layout>::iterate,
ViewFillLayoutSelector<Layout>::iterate>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewFill(const ViewType& a_, typename ViewType::const_value_type& val_,
const ExecSpace& space)
: a(a_), val(val_) {
Kokkos::parallel_for("Kokkos::ViewFill-8D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(3),
a.extent(5), a.extent(6), a.extent(7)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i3,
const iType& i5, const iType& i6, const iType& i7) const {
for (iType i2 = 0; i2 < iType(a.extent(2)); i2++)
for (iType i4 = 0; i4 < iType(a.extent(4)); i4++)
a(i0, i1, i2, i3, i4, i5, i6, i7) = val;
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 1, iType> {
ViewTypeA a;
ViewTypeB b;
using policy_type = Kokkos::RangePolicy<ExecSpace, Kokkos::IndexType<iType>>;
using value_type = typename ViewTypeA::value_type;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-1D",
policy_type(space, 0, a.extent(0)), *this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0) const {
a(i0) = static_cast<value_type>(b(i0));
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 2, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<2, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
using value_type = typename ViewTypeA::value_type;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-2D",
policy_type(space, {0, 0}, {a.extent(0), a.extent(1)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1) const {
a(i0, i1) = static_cast<value_type>(b(i0, i1));
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 3, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<3, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
using value_type = typename ViewTypeA::value_type;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for(
"Kokkos::ViewCopy-3D",
policy_type(space, {0, 0, 0}, {a.extent(0), a.extent(1), a.extent(2)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2) const {
a(i0, i1, i2) = static_cast<value_type>(b(i0, i1, i2));
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 4, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<4, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for(
"Kokkos::ViewCopy-4D",
policy_type(space, {0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3) const {
a(i0, i1, i2, i3) = b(i0, i1, i2, i3);
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 5, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<5, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-5D",
policy_type(space, {0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2),
a.extent(3), a.extent(4)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3, const iType& i4) const {
a(i0, i1, i2, i3, i4) = b(i0, i1, i2, i3, i4);
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 6, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<6, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-6D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2),
a.extent(3), a.extent(4), a.extent(5)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i2,
const iType& i3, const iType& i4, const iType& i5) const {
a(i0, i1, i2, i3, i4, i5) = b(i0, i1, i2, i3, i4, i5);
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 7, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<6, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-7D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(3),
a.extent(4), a.extent(5), a.extent(6)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i3,
const iType& i4, const iType& i5, const iType& i6) const {
for (iType i2 = 0; i2 < iType(a.extent(2)); i2++)
a(i0, i1, i2, i3, i4, i5, i6) = b(i0, i1, i2, i3, i4, i5, i6);
};
};
template <class ViewTypeA, class ViewTypeB, class Layout, class ExecSpace,
typename iType>
struct ViewCopy<ViewTypeA, ViewTypeB, Layout, ExecSpace, 8, iType> {
ViewTypeA a;
ViewTypeB b;
static const Kokkos::Iterate outer_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::outer_iteration_pattern;
static const Kokkos::Iterate inner_iteration_pattern =
Kokkos::layout_iterate_type_selector<Layout>::inner_iteration_pattern;
using iterate_type =
Kokkos::Rank<6, outer_iteration_pattern, inner_iteration_pattern>;
using policy_type =
Kokkos::MDRangePolicy<ExecSpace, iterate_type, Kokkos::IndexType<iType>>;
ViewCopy(const ViewTypeA& a_, const ViewTypeB& b_,
const ExecSpace space = ExecSpace())
: a(a_), b(b_) {
Kokkos::parallel_for("Kokkos::ViewCopy-8D",
policy_type(space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(3),
a.extent(5), a.extent(6), a.extent(7)}),
*this);
}
KOKKOS_INLINE_FUNCTION
void operator()(const iType& i0, const iType& i1, const iType& i3,
const iType& i5, const iType& i6, const iType& i7) const {
for (iType i2 = 0; i2 < iType(a.extent(2)); i2++)
for (iType i4 = 0; i4 < iType(a.extent(4)); i4++)
a(i0, i1, i2, i3, i4, i5, i6, i7) = b(i0, i1, i2, i3, i4, i5, i6, i7);
};
};
} // namespace Impl
} // namespace Kokkos
namespace Kokkos {
namespace Impl {
template <class ExecutionSpace, class DstType, class SrcType>
void view_copy(const ExecutionSpace& space, const DstType& dst,
const SrcType& src) {
using dst_memory_space = typename DstType::memory_space;
using src_memory_space = typename SrcType::memory_space;
enum {
ExecCanAccessSrc =
Kokkos::SpaceAccessibility<ExecutionSpace, src_memory_space>::accessible
};
enum {
ExecCanAccessDst =
Kokkos::SpaceAccessibility<ExecutionSpace, dst_memory_space>::accessible
};
if (!(ExecCanAccessSrc && ExecCanAccessDst)) {
Kokkos::Impl::throw_runtime_exception(
"Kokkos::Impl::view_copy called with invalid execution space");
} else {
// Figure out iteration order in case we need it
int64_t strides[DstType::rank + 1];
dst.stride(strides);
Kokkos::Iterate iterate;
if (Kokkos::is_layouttiled<typename DstType::array_layout>::value) {
iterate = Kokkos::layout_iterate_type_selector<
typename DstType::array_layout>::outer_iteration_pattern;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutRight>::value) {
iterate = Kokkos::Iterate::Right;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutLeft>::value) {
iterate = Kokkos::Iterate::Left;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutStride>::value) {
if (strides[0] > strides[DstType::rank - 1])
iterate = Kokkos::Iterate::Right;
else
iterate = Kokkos::Iterate::Left;
} else {
if (std::is_same<typename DstType::execution_space::array_layout,
Kokkos::LayoutRight>::value)
iterate = Kokkos::Iterate::Right;
else
iterate = Kokkos::Iterate::Left;
}
if ((dst.span() >= size_t(std::numeric_limits<int>::max())) ||
(src.span() >= size_t(std::numeric_limits<int>::max()))) {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, ExecutionSpace, DstType::rank, int64_t>(
dst, src, space);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, ExecutionSpace, DstType::rank, int64_t>(
dst, src, space);
} else {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, ExecutionSpace, DstType::rank, int>(dst, src,
space);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, ExecutionSpace, DstType::rank, int>(dst, src,
space);
}
}
}
template <class DstType, class SrcType>
void view_copy(const DstType& dst, const SrcType& src) {
using dst_execution_space = typename DstType::execution_space;
using src_execution_space = typename SrcType::execution_space;
using dst_memory_space = typename DstType::memory_space;
using src_memory_space = typename SrcType::memory_space;
enum {
DstExecCanAccessSrc =
Kokkos::SpaceAccessibility<dst_execution_space,
src_memory_space>::accessible
};
enum {
SrcExecCanAccessDst =
Kokkos::SpaceAccessibility<src_execution_space,
dst_memory_space>::accessible
};
if (!DstExecCanAccessSrc && !SrcExecCanAccessDst) {
std::ostringstream ss;
ss << "Error: Kokkos::deep_copy with no available copy mechanism: "
<< "from source view (\"" << src.label() << "\") to destination view (\""
<< dst.label() << "\").\n"
<< "There is no common execution space that can access both source's "
"space\n"
<< "(" << src_memory_space().name() << ") and destination's space ("
<< dst_memory_space().name() << "), "
<< "so source and destination\n"
<< "must be contiguous and have the same layout.\n";
Kokkos::Impl::throw_runtime_exception(ss.str());
}
// Figure out iteration order in case we need it
int64_t strides[DstType::rank + 1];
dst.stride(strides);
Kokkos::Iterate iterate;
if (Kokkos::is_layouttiled<typename DstType::array_layout>::value) {
iterate = Kokkos::layout_iterate_type_selector<
typename DstType::array_layout>::outer_iteration_pattern;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutRight>::value) {
iterate = Kokkos::Iterate::Right;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutLeft>::value) {
iterate = Kokkos::Iterate::Left;
} else if (std::is_same<typename DstType::array_layout,
Kokkos::LayoutStride>::value) {
if (strides[0] > strides[DstType::rank - 1])
iterate = Kokkos::Iterate::Right;
else
iterate = Kokkos::Iterate::Left;
} else {
if (std::is_same<typename DstType::execution_space::array_layout,
Kokkos::LayoutRight>::value)
iterate = Kokkos::Iterate::Right;
else
iterate = Kokkos::Iterate::Left;
}
if ((dst.span() >= size_t(std::numeric_limits<int>::max())) ||
(src.span() >= size_t(std::numeric_limits<int>::max()))) {
if (DstExecCanAccessSrc) {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, dst_execution_space, DstType::rank, int64_t>(
dst, src);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, dst_execution_space, DstType::rank, int64_t>(
dst, src);
} else {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, src_execution_space, DstType::rank, int64_t>(
dst, src);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, src_execution_space, DstType::rank, int64_t>(
dst, src);
}
} else {
if (DstExecCanAccessSrc) {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, dst_execution_space, DstType::rank, int>(dst,
src);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, dst_execution_space, DstType::rank, int>(dst,
src);
} else {
if (iterate == Kokkos::Iterate::Right)
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutRight, src_execution_space, DstType::rank, int>(dst,
src);
else
Kokkos::Impl::ViewCopy<
typename DstType::uniform_runtime_nomemspace_type,
typename SrcType::uniform_runtime_const_nomemspace_type,
Kokkos::LayoutLeft, src_execution_space, DstType::rank, int>(dst,
src);
}
}
}
template <class DstType, class SrcType, int Rank, class... Args>
struct CommonSubview;
template <class DstType, class SrcType, class Arg0, class... Args>
struct CommonSubview<DstType, SrcType, 1, Arg0, Args...> {
using dst_subview_type = typename Kokkos::Subview<DstType, Arg0>;
using src_subview_type = typename Kokkos::Subview<SrcType, Arg0>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
Args...)
: dst_sub(dst, arg0), src_sub(src, arg0) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class... Args>
struct CommonSubview<DstType, SrcType, 2, Arg0, Arg1, Args...> {
using dst_subview_type = typename Kokkos::Subview<DstType, Arg0, Arg1>;
using src_subview_type = typename Kokkos::Subview<SrcType, Arg0, Arg1>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, Args...)
: dst_sub(dst, arg0, arg1), src_sub(src, arg0, arg1) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class... Args>
struct CommonSubview<DstType, SrcType, 3, Arg0, Arg1, Arg2, Args...> {
using dst_subview_type = typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2>;
using src_subview_type = typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, Args...)
: dst_sub(dst, arg0, arg1, arg2), src_sub(src, arg0, arg1, arg2) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class Arg3, class... Args>
struct CommonSubview<DstType, SrcType, 4, Arg0, Arg1, Arg2, Arg3, Args...> {
using dst_subview_type =
typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2, Arg3>;
using src_subview_type =
typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2, Arg3>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
const Args...)
: dst_sub(dst, arg0, arg1, arg2, arg3),
src_sub(src, arg0, arg1, arg2, arg3) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class Arg3, class Arg4, class... Args>
struct CommonSubview<DstType, SrcType, 5, Arg0, Arg1, Arg2, Arg3, Arg4,
Args...> {
using dst_subview_type =
typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2, Arg3, Arg4>;
using src_subview_type =
typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2, Arg3, Arg4>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
const Arg4& arg4, const Args...)
: dst_sub(dst, arg0, arg1, arg2, arg3, arg4),
src_sub(src, arg0, arg1, arg2, arg3, arg4) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class Arg3, class Arg4, class Arg5, class... Args>
struct CommonSubview<DstType, SrcType, 6, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
Args...> {
using dst_subview_type =
typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5>;
using src_subview_type =
typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
const Arg4& arg4, const Arg5& arg5, const Args...)
: dst_sub(dst, arg0, arg1, arg2, arg3, arg4, arg5),
src_sub(src, arg0, arg1, arg2, arg3, arg4, arg5) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class Arg3, class Arg4, class Arg5, class Arg6, class... Args>
struct CommonSubview<DstType, SrcType, 7, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
Arg6, Args...> {
using dst_subview_type = typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2,
Arg3, Arg4, Arg5, Arg6>;
using src_subview_type = typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2,
Arg3, Arg4, Arg5, Arg6>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
const Arg4& arg4, const Arg5& arg5, const Arg6& arg6, Args...)
: dst_sub(dst, arg0, arg1, arg2, arg3, arg4, arg5, arg6),
src_sub(src, arg0, arg1, arg2, arg3, arg4, arg5, arg6) {}
};
template <class DstType, class SrcType, class Arg0, class Arg1, class Arg2,
class Arg3, class Arg4, class Arg5, class Arg6, class Arg7>
struct CommonSubview<DstType, SrcType, 8, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
Arg6, Arg7> {
using dst_subview_type =
typename Kokkos::Subview<DstType, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
Arg6, Arg7>;
using src_subview_type =
typename Kokkos::Subview<SrcType, Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
Arg6, Arg7>;
dst_subview_type dst_sub;
src_subview_type src_sub;
CommonSubview(const DstType& dst, const SrcType& src, const Arg0& arg0,
const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
const Arg4& arg4, const Arg5& arg5, const Arg6& arg6,
const Arg7& arg7)
: dst_sub(dst, arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7),
src_sub(src, arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7) {}
};
template <class DstType, class SrcType,
class ExecSpace = typename DstType::execution_space,
int Rank = DstType::rank>
struct ViewRemap;
template <class DstType, class SrcType, class ExecSpace>
struct ViewRemap<DstType, SrcType, ExecSpace, 1> {
using p_type = Kokkos::pair<int64_t, int64_t>;
template <typename... OptExecSpace>
ViewRemap(const DstType& dst, const SrcType& src,
const OptExecSpace&... exec_space) {
static_assert(
sizeof...(OptExecSpace) <= 1,
"OptExecSpace must be either empty or be an execution space!");
if (dst.extent(0) == src.extent(0)) {
view_copy(exec_space..., dst, src);
} else {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
using sv_adapter_type = CommonSubview<DstType, SrcType, 1, p_type>;
sv_adapter_type common_subview(dst, src, ext0);
view_copy(exec_space..., common_subview.dst_sub, common_subview.src_sub);
}
}
};
template <class DstType, class SrcType, class ExecSpace>
struct ViewRemap<DstType, SrcType, ExecSpace, 2> {
using p_type = Kokkos::pair<int64_t, int64_t>;
template <typename... OptExecSpace>
ViewRemap(const DstType& dst, const SrcType& src,
const OptExecSpace&... exec_space) {
static_assert(
sizeof...(OptExecSpace) <= 1,
"OptExecSpace must be either empty or be an execution space!");
if (dst.extent(0) == src.extent(0)) {
if (dst.extent(1) == src.extent(1)) {
view_copy(exec_space..., dst, src);
} else {
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 2, Kokkos::ALL_t, p_type>;
sv_adapter_type common_subview(dst, src, Kokkos::ALL, ext1);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
}
} else {
if (dst.extent(1) == src.extent(1)) {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 2, p_type, Kokkos::ALL_t>;
sv_adapter_type common_subview(dst, src, ext0, Kokkos::ALL);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
} else {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 2, p_type, p_type>;
sv_adapter_type common_subview(dst, src, ext0, ext1);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
}
}
}
};
template <class DstType, class SrcType, class ExecSpace>
struct ViewRemap<DstType, SrcType, ExecSpace, 3> {
using p_type = Kokkos::pair<int64_t, int64_t>;
template <typename... OptExecSpace>
ViewRemap(const DstType& dst, const SrcType& src,
const OptExecSpace&... exec_space) {
static_assert(
sizeof...(OptExecSpace) <= 1,
"OptExecSpace must be either empty or be an execution space!");
if (dst.extent(0) == src.extent(0)) {
if (dst.extent(2) == src.extent(2)) {
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 3, Kokkos::ALL_t, p_type,
Kokkos::ALL_t>;
sv_adapter_type common_subview(dst, src, Kokkos::ALL, ext1,
Kokkos::ALL);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
} else {
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
p_type ext2(0, std::min(dst.extent(2), src.extent(2)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 3, Kokkos::ALL_t, p_type, p_type>;
sv_adapter_type common_subview(dst, src, Kokkos::ALL, ext1, ext2);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
}
} else {
if (dst.extent(2) == src.extent(2)) {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 3, p_type, p_type, Kokkos::ALL_t>;
sv_adapter_type common_subview(dst, src, ext0, ext1, Kokkos::ALL);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
} else {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
p_type ext2(0, std::min(dst.extent(2), src.extent(2)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 3, p_type, p_type, p_type>;
sv_adapter_type common_subview(dst, src, ext0, ext1, ext2);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
}
}
}
};
template <class DstType, class SrcType, class ExecSpace>
struct ViewRemap<DstType, SrcType, ExecSpace, 4> {
using p_type = Kokkos::pair<int64_t, int64_t>;
template <typename... OptExecSpace>
ViewRemap(const DstType& dst, const SrcType& src,
const OptExecSpace&... exec_space) {
static_assert(
sizeof...(OptExecSpace) <= 1,
"OptExecSpace must be either empty or be an execution space!");
if (dst.extent(0) == src.extent(0)) {
if (dst.extent(3) == src.extent(3)) {
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
p_type ext2(0, std::min(dst.extent(2), src.extent(2)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 4, Kokkos::ALL_t, p_type, p_type,
Kokkos::ALL_t>;
sv_adapter_type common_subview(dst, src, Kokkos::ALL, ext1, ext2,
Kokkos::ALL);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
} else {
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
p_type ext2(0, std::min(dst.extent(2), src.extent(2)));
p_type ext3(0, std::min(dst.extent(3), src.extent(3)));
using sv_adapter_type =
CommonSubview<DstType, SrcType, 4, Kokkos::ALL_t, p_type, p_type,
p_type>;
sv_adapter_type common_subview(dst, src, Kokkos::ALL, ext1, ext2, ext3);
view_copy(exec_space..., common_subview.dst_sub,
common_subview.src_sub);
}
} else {
if (dst.extent(7) == src.extent(7)) {
p_type ext0(0, std::min(dst.extent(0), src.extent(0)));
p_type ext1(0, std::min(dst.extent(1), src.extent(1)));
p_type ext2(0, std::min(dst.extent(2), src.extent(2)));