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Kokkos_OffsetView.hpp
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Kokkos_OffsetView.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_OFFSETVIEW_HPP_
#define KOKKOS_OFFSETVIEW_HPP_
#ifndef KOKKOS_IMPL_PUBLIC_INCLUDE
#define KOKKOS_IMPL_PUBLIC_INCLUDE
#define KOKKOS_IMPL_PUBLIC_INCLUDE_NOTDEFINED_OFFSETVIEW
#endif
#include <Kokkos_Core.hpp>
#include <Kokkos_View.hpp>
namespace Kokkos {
namespace Experimental {
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
template <class DataType, class... Properties>
class OffsetView;
template <class>
struct is_offset_view : public std::false_type {};
template <class D, class... P>
struct is_offset_view<OffsetView<D, P...>> : public std::true_type {};
template <class D, class... P>
struct is_offset_view<const OffsetView<D, P...>> : public std::true_type {};
template <class T>
inline constexpr bool is_offset_view_v = is_offset_view<T>::value;
#define KOKKOS_INVALID_OFFSET int64_t(0x7FFFFFFFFFFFFFFFLL)
#define KOKKOS_INVALID_INDEX_RANGE \
{ KOKKOS_INVALID_OFFSET, KOKKOS_INVALID_OFFSET }
template <typename iType, std::enable_if_t<std::is_integral<iType>::value &&
std::is_signed<iType>::value,
iType> = 0>
using IndexRange = Kokkos::Array<iType, 2>;
using index_list_type = std::initializer_list<int64_t>;
// template <typename iType,
// std::enable_if_t< std::is_integral<iType>::value &&
// std::is_signed<iType>::value, iType > = 0> using min_index_type =
// std::initializer_list<iType>;
namespace Impl {
template <class ViewType>
struct GetOffsetViewTypeFromViewType {
using type =
OffsetView<typename ViewType::data_type, typename ViewType::array_layout,
typename ViewType::device_type,
typename ViewType::memory_traits>;
};
template <unsigned, class MapType, class BeginsType>
KOKKOS_INLINE_FUNCTION bool offsetview_verify_operator_bounds(
const MapType&, const BeginsType&) {
return true;
}
template <unsigned R, class MapType, class BeginsType, class iType,
class... Args>
KOKKOS_INLINE_FUNCTION bool offsetview_verify_operator_bounds(
const MapType& map, const BeginsType& begins, const iType& i,
Args... args) {
const bool legalIndex =
(int64_t(i) >= begins[R]) &&
(int64_t(i) <= int64_t(begins[R] + map.extent(R) - 1));
return legalIndex &&
offsetview_verify_operator_bounds<R + 1>(map, begins, args...);
}
template <unsigned, class MapType, class BeginsType>
inline void offsetview_error_operator_bounds(char*, int, const MapType&,
const BeginsType&) {}
template <unsigned R, class MapType, class BeginsType, class iType,
class... Args>
inline void offsetview_error_operator_bounds(char* buf, int len,
const MapType& map,
const BeginsType begins,
const iType& i, Args... args) {
const int64_t b = begins[R];
const int64_t e = b + map.extent(R) - 1;
const int n =
snprintf(buf, len, " %ld <= %ld <= %ld %c", static_cast<unsigned long>(b),
static_cast<unsigned long>(i), static_cast<unsigned long>(e),
(sizeof...(Args) ? ',' : ')'));
offsetview_error_operator_bounds<R + 1>(buf + n, len - n, map, begins,
args...);
}
template <class MemorySpace, class MapType, class BeginsType, class... Args>
KOKKOS_INLINE_FUNCTION void offsetview_verify_operator_bounds(
Kokkos::Impl::SharedAllocationTracker const& tracker, const MapType& map,
const BeginsType& begins, Args... args) {
if (!offsetview_verify_operator_bounds<0>(map, begins, args...)) {
KOKKOS_IF_ON_HOST(
(enum {LEN = 1024}; char buffer[LEN];
const std::string label = tracker.template get_label<MemorySpace>();
int n = snprintf(buffer, LEN,
"OffsetView bounds error of view labeled %s (",
label.c_str());
offsetview_error_operator_bounds<0>(buffer + n, LEN - n, map, begins,
args...);
Kokkos::Impl::throw_runtime_exception(std::string(buffer));))
KOKKOS_IF_ON_DEVICE(
(Kokkos::abort("OffsetView bounds error"); (void)tracker;))
}
}
inline void runtime_check_rank_host(const size_t rank_dynamic,
const size_t rank,
const index_list_type minIndices,
const std::string& label) {
bool isBad = false;
std::string message =
"Kokkos::Experimental::OffsetView ERROR: for OffsetView labeled '" +
label + "':";
if (rank_dynamic != rank) {
message +=
"The full rank must be the same as the dynamic rank. full rank = ";
message += std::to_string(rank) +
" dynamic rank = " + std::to_string(rank_dynamic) + "\n";
isBad = true;
}
size_t numOffsets = 0;
for (size_t i = 0; i < minIndices.size(); ++i) {
if (minIndices.begin()[i] != KOKKOS_INVALID_OFFSET) numOffsets++;
}
if (numOffsets != rank_dynamic) {
message += "The number of offsets provided ( " +
std::to_string(numOffsets) +
" ) must equal the dynamic rank ( " +
std::to_string(rank_dynamic) + " ).";
isBad = true;
}
if (isBad) Kokkos::abort(message.c_str());
}
KOKKOS_INLINE_FUNCTION
void runtime_check_rank_device(const size_t rank_dynamic, const size_t rank,
const index_list_type minIndices) {
if (rank_dynamic != rank) {
Kokkos::abort(
"The full rank of an OffsetView must be the same as the dynamic rank.");
}
size_t numOffsets = 0;
for (size_t i = 0; i < minIndices.size(); ++i) {
if (minIndices.begin()[i] != KOKKOS_INVALID_OFFSET) numOffsets++;
}
if (numOffsets != rank) {
Kokkos::abort(
"The number of offsets provided to an OffsetView constructor must "
"equal the dynamic rank.");
}
}
} // namespace Impl
template <class DataType, class... Properties>
class OffsetView : public ViewTraits<DataType, Properties...> {
public:
using traits = ViewTraits<DataType, Properties...>;
private:
template <class, class...>
friend class OffsetView;
template <class, class...>
friend class View; // FIXME delete this line
template <class, class...>
friend class Kokkos::Impl::ViewMapping;
using map_type = Kokkos::Impl::ViewMapping<traits, void>;
using track_type = Kokkos::Impl::SharedAllocationTracker;
public:
enum { Rank = map_type::Rank };
using begins_type = Kokkos::Array<int64_t, Rank>;
template <typename iType,
std::enable_if_t<std::is_integral<iType>::value, iType> = 0>
KOKKOS_FUNCTION int64_t begin(const iType local_dimension) const {
return local_dimension < Rank ? m_begins[local_dimension]
: KOKKOS_INVALID_OFFSET;
}
KOKKOS_FUNCTION
begins_type begins() const { return m_begins; }
template <typename iType,
std::enable_if_t<std::is_integral<iType>::value, iType> = 0>
KOKKOS_FUNCTION int64_t end(const iType local_dimension) const {
return begin(local_dimension) + m_map.extent(local_dimension);
}
private:
track_type m_track;
map_type m_map;
begins_type m_begins;
public:
//----------------------------------------
/** \brief Compatible view of array of scalar types */
using array_type =
OffsetView<typename traits::scalar_array_type,
typename traits::array_layout, typename traits::device_type,
typename traits::memory_traits>;
/** \brief Compatible view of const data type */
using const_type =
OffsetView<typename traits::const_data_type,
typename traits::array_layout, typename traits::device_type,
typename traits::memory_traits>;
/** \brief Compatible view of non-const data type */
using non_const_type =
OffsetView<typename traits::non_const_data_type,
typename traits::array_layout, typename traits::device_type,
typename traits::memory_traits>;
/** \brief Compatible HostMirror view */
using HostMirror = OffsetView<typename traits::non_const_data_type,
typename traits::array_layout,
typename traits::host_mirror_space>;
//----------------------------------------
// Domain rank and extents
/** \brief rank() to be implemented
*/
// KOKKOS_FUNCTION
// static
// constexpr unsigned rank() { return map_type::Rank; }
template <typename iType>
KOKKOS_FUNCTION constexpr std::enable_if_t<std::is_integral<iType>::value,
size_t>
extent(const iType& r) const {
return m_map.extent(r);
}
template <typename iType>
KOKKOS_FUNCTION constexpr std::enable_if_t<std::is_integral<iType>::value,
int>
extent_int(const iType& r) const {
return static_cast<int>(m_map.extent(r));
}
KOKKOS_FUNCTION constexpr typename traits::array_layout layout() const {
return m_map.layout();
}
KOKKOS_FUNCTION constexpr size_t size() const {
return m_map.dimension_0() * m_map.dimension_1() * m_map.dimension_2() *
m_map.dimension_3() * m_map.dimension_4() * m_map.dimension_5() *
m_map.dimension_6() * m_map.dimension_7();
}
KOKKOS_FUNCTION constexpr size_t stride_0() const { return m_map.stride_0(); }
KOKKOS_FUNCTION constexpr size_t stride_1() const { return m_map.stride_1(); }
KOKKOS_FUNCTION constexpr size_t stride_2() const { return m_map.stride_2(); }
KOKKOS_FUNCTION constexpr size_t stride_3() const { return m_map.stride_3(); }
KOKKOS_FUNCTION constexpr size_t stride_4() const { return m_map.stride_4(); }
KOKKOS_FUNCTION constexpr size_t stride_5() const { return m_map.stride_5(); }
KOKKOS_FUNCTION constexpr size_t stride_6() const { return m_map.stride_6(); }
KOKKOS_FUNCTION constexpr size_t stride_7() const { return m_map.stride_7(); }
template <typename iType>
KOKKOS_FUNCTION constexpr std::enable_if_t<std::is_integral<iType>::value,
size_t>
stride(iType r) const {
return (
r == 0
? m_map.stride_0()
: (r == 1
? m_map.stride_1()
: (r == 2
? m_map.stride_2()
: (r == 3
? m_map.stride_3()
: (r == 4
? m_map.stride_4()
: (r == 5
? m_map.stride_5()
: (r == 6
? m_map.stride_6()
: m_map.stride_7())))))));
}
template <typename iType>
KOKKOS_FUNCTION void stride(iType* const s) const {
m_map.stride(s);
}
//----------------------------------------
// Range span is the span which contains all members.
using reference_type = typename map_type::reference_type;
using pointer_type = typename map_type::pointer_type;
enum {
reference_type_is_lvalue_reference =
std::is_lvalue_reference<reference_type>::value
};
KOKKOS_FUNCTION constexpr size_t span() const { return m_map.span(); }
KOKKOS_FUNCTION bool span_is_contiguous() const {
return m_map.span_is_contiguous();
}
KOKKOS_FUNCTION constexpr bool is_allocated() const {
return m_map.data() != nullptr;
}
KOKKOS_FUNCTION constexpr pointer_type data() const { return m_map.data(); }
//----------------------------------------
// Allow specializations to query their specialized map
KOKKOS_FUNCTION
const Kokkos::Impl::ViewMapping<traits, void>& implementation_map() const {
return m_map;
}
//----------------------------------------
private:
static constexpr bool is_layout_left =
std::is_same<typename traits::array_layout, Kokkos::LayoutLeft>::value;
static constexpr bool is_layout_right =
std::is_same<typename traits::array_layout, Kokkos::LayoutRight>::value;
static constexpr bool is_layout_stride =
std::is_same<typename traits::array_layout, Kokkos::LayoutStride>::value;
static constexpr bool is_default_map =
std::is_void<typename traits::specialize>::value &&
(is_layout_left || is_layout_right || is_layout_stride);
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
#define KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(ARG) \
Kokkos::Impl::runtime_check_memory_access_violation< \
typename traits::memory_space>( \
"Kokkos::OffsetView ERROR: attempt to access inaccessible memory " \
"space"); \
Kokkos::Experimental::Impl::offsetview_verify_operator_bounds< \
typename traits::memory_space> \
ARG;
#else
#define KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(ARG) \
Kokkos::Impl::runtime_check_memory_access_violation< \
typename traits::memory_space>( \
"Kokkos::OffsetView ERROR: attempt to access inaccessible memory " \
"space");
#endif
public:
//------------------------------
// Rank 0 operator()
KOKKOS_FORCEINLINE_FUNCTION
reference_type operator()() const { return m_map.reference(); }
//------------------------------
// Rank 1 operator()
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.reference(j0);
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) &&
is_default_map && !is_layout_stride),
reference_type>
operator()(const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.m_impl_handle[j0];
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) &&
is_default_map && is_layout_stride),
reference_type>
operator()(const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.m_impl_handle[m_map.m_impl_offset.m_stride.S0 * j0];
}
//------------------------------
// Rank 1 operator[]
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) && !is_default_map),
reference_type>
operator[](const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.reference(j0);
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) &&
is_default_map && !is_layout_stride),
reference_type>
operator[](const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.m_impl_handle[j0];
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0>::value && (1 == Rank) &&
is_default_map && is_layout_stride),
reference_type>
operator[](const I0& i0) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0))
const size_t j0 = i0 - m_begins[0];
return m_map.m_impl_handle[m_map.m_impl_offset.m_stride.S0 * j0];
}
//------------------------------
// Rank 2
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1>::value &&
(2 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.reference(j0, j1);
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1>::value && (2 == Rank) &&
is_default_map && is_layout_left && (traits::rank_dynamic == 0)),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.m_impl_handle[j0 + m_map.m_impl_offset.m_dim.N0 * j1];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1>::value && (2 == Rank) &&
is_default_map && is_layout_left && (traits::rank_dynamic != 0)),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.m_impl_handle[j0 + m_map.m_impl_offset.m_stride * j1];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1>::value && (2 == Rank) &&
is_default_map && is_layout_right && (traits::rank_dynamic == 0)),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.m_impl_handle[j1 + m_map.m_impl_offset.m_dim.N1 * j0];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1>::value && (2 == Rank) &&
is_default_map && is_layout_right && (traits::rank_dynamic != 0)),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.m_impl_handle[j1 + m_map.m_impl_offset.m_stride * j0];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1>::value &&
(2 == Rank) && is_default_map && is_layout_stride),
reference_type>
operator()(const I0& i0, const I1& i1) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY((m_track, m_map, m_begins, i0, i1))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
return m_map.m_impl_handle[j0 * m_map.m_impl_offset.m_stride.S0 +
j1 * m_map.m_impl_offset.m_stride.S1];
}
//------------------------------
// Rank 3
template <typename I0, typename I1, typename I2>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2>::value &&
(3 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
return m_map.m_impl_handle[m_map.m_impl_offset(j0, j1, j2)];
}
template <typename I0, typename I1, typename I2>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2>::value &&
(3 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
return m_map.reference(j0, j1, j2);
}
//------------------------------
// Rank 4
template <typename I0, typename I1, typename I2, typename I3>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2, I3>::value &&
(4 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
return m_map.m_impl_handle[m_map.m_impl_offset(j0, j1, j2, j3)];
}
template <typename I0, typename I1, typename I2, typename I3>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2, I3>::value &&
(4 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
return m_map.reference(j0, j1, j2, j3);
}
//------------------------------
// Rank 5
template <typename I0, typename I1, typename I2, typename I3, typename I4>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4>::value &&
(5 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
return m_map.m_impl_handle[m_map.m_impl_offset(j0, j1, j2, j3, j4)];
}
template <typename I0, typename I1, typename I2, typename I3, typename I4>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4>::value &&
(5 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
return m_map.reference(j0, j1, j2, j3, j4);
}
//------------------------------
// Rank 6
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5>::value &&
(6 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
return m_map.m_impl_handle[m_map.m_impl_offset(j0, j1, j2, j3, j4, j5)];
}
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5>::value &&
(6 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
return m_map.reference(j0, j1, j2, j3, j4, j5);
}
//------------------------------
// Rank 7
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5, I6>::value &&
(7 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5, const I6& i6) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5, i6))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
const size_t j6 = i6 - m_begins[6];
return m_map.m_impl_handle[m_map.m_impl_offset(j0, j1, j2, j3, j4, j5, j6)];
}
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5, I6>::value &&
(7 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5, const I6& i6) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5, i6))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
const size_t j6 = i6 - m_begins[6];
return m_map.reference(j0, j1, j2, j3, j4, j5, j6);
}
//------------------------------
// Rank 8
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6, typename I7>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5, I6, I7>::value &&
(8 == Rank) && is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5, const I6& i6, const I7& i7) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5, i6, i7))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
const size_t j6 = i6 - m_begins[6];
const size_t j7 = i7 - m_begins[7];
return m_map
.m_impl_handle[m_map.m_impl_offset(j0, j1, j2, j3, j4, j5, j6, j7)];
}
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6, typename I7>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::are_integral<I0, I1, I2, I3, I4, I5, I6, I7>::value &&
(8 == Rank) && !is_default_map),
reference_type>
operator()(const I0& i0, const I1& i1, const I2& i2, const I3& i3,
const I4& i4, const I5& i5, const I6& i6, const I7& i7) const {
KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY(
(m_track, m_map, m_begins, i0, i1, i2, i3, i4, i5, i6, i7))
const size_t j0 = i0 - m_begins[0];
const size_t j1 = i1 - m_begins[1];
const size_t j2 = i2 - m_begins[2];
const size_t j3 = i3 - m_begins[3];
const size_t j4 = i4 - m_begins[4];
const size_t j5 = i5 - m_begins[5];
const size_t j6 = i6 - m_begins[6];
const size_t j7 = i7 - m_begins[7];
return m_map.reference(j0, j1, j2, j3, j4, j5, j6, j7);
}
#undef KOKKOS_IMPL_OFFSETVIEW_OPERATOR_VERIFY
//----------------------------------------
// Standard destructor, constructors, and assignment operators
KOKKOS_DEFAULTED_FUNCTION
~OffsetView() = default;
KOKKOS_FUNCTION
OffsetView() : m_track(), m_map() {
for (size_t i = 0; i < Rank; ++i) m_begins[i] = KOKKOS_INVALID_OFFSET;
}
KOKKOS_FUNCTION
OffsetView(const OffsetView& rhs)
: m_track(rhs.m_track, traits::is_managed),
m_map(rhs.m_map),
m_begins(rhs.m_begins) {}
KOKKOS_FUNCTION
OffsetView(OffsetView&& rhs)
: m_track(std::move(rhs.m_track)),
m_map(std::move(rhs.m_map)),
m_begins(std::move(rhs.m_begins)) {}
KOKKOS_FUNCTION
OffsetView& operator=(const OffsetView& rhs) {
m_track = rhs.m_track;
m_map = rhs.m_map;
m_begins = rhs.m_begins;
return *this;
}
KOKKOS_FUNCTION
OffsetView& operator=(OffsetView&& rhs) {
m_track = std::move(rhs.m_track);
m_map = std::move(rhs.m_map);
m_begins = std::move(rhs.m_begins);
return *this;
}
// interoperability with View
private:
using view_type =
View<typename traits::scalar_array_type, typename traits::array_layout,
typename traits::device_type, typename traits::memory_traits>;
public:
KOKKOS_FUNCTION
view_type view() const {
view_type v(m_track, m_map);
return v;
}
template <class RT, class... RP>
KOKKOS_FUNCTION OffsetView(const View<RT, RP...>& aview)
: m_track(aview.impl_track()), m_map() {
using SrcTraits = typename OffsetView<RT, RP...>::traits;
using Mapping = Kokkos::Impl::ViewMapping<traits, SrcTraits, void>;
static_assert(Mapping::is_assignable,
"Incompatible OffsetView copy construction");
Mapping::assign(m_map, aview.impl_map(), m_track);
for (size_t i = 0; i < View<RT, RP...>::rank(); ++i) {
m_begins[i] = 0;
}
}
template <class RT, class... RP>
KOKKOS_FUNCTION OffsetView(const View<RT, RP...>& aview,
const index_list_type& minIndices)
: m_track(aview.impl_track()), m_map() {
using SrcTraits = typename OffsetView<RT, RP...>::traits;
using Mapping = Kokkos::Impl::ViewMapping<traits, SrcTraits, void>;
static_assert(Mapping::is_assignable,
"Incompatible OffsetView copy construction");
Mapping::assign(m_map, aview.impl_map(), m_track);
KOKKOS_IF_ON_HOST((Kokkos::Experimental::Impl::runtime_check_rank_host(
traits::rank_dynamic, Rank, minIndices, label());))
KOKKOS_IF_ON_DEVICE((Kokkos::Experimental::Impl::runtime_check_rank_device(
traits::rank_dynamic, Rank, minIndices);))
for (size_t i = 0; i < minIndices.size(); ++i) {
m_begins[i] = minIndices.begin()[i];
}
}
template <class RT, class... RP>
KOKKOS_FUNCTION OffsetView(const View<RT, RP...>& aview,
const begins_type& beg)
: m_track(aview.impl_track()), m_map(), m_begins(beg) {
using SrcTraits = typename OffsetView<RT, RP...>::traits;
using Mapping = Kokkos::Impl::ViewMapping<traits, SrcTraits, void>;
static_assert(Mapping::is_assignable,
"Incompatible OffsetView copy construction");
Mapping::assign(m_map, aview.impl_map(), m_track);
}
// may assign unmanaged from managed.
template <class RT, class... RP>
KOKKOS_FUNCTION OffsetView(const OffsetView<RT, RP...>& rhs)
: m_track(rhs.m_track, traits::is_managed),
m_map(),
m_begins(rhs.m_begins) {
using SrcTraits = typename OffsetView<RT, RP...>::traits;
using Mapping = Kokkos::Impl::ViewMapping<traits, SrcTraits, void>;
static_assert(Mapping::is_assignable,
"Incompatible OffsetView copy construction");
Mapping::assign(m_map, rhs.m_map, rhs.m_track); // swb what about assign?
}
private:
enum class subtraction_failure {
none,
negative,
overflow,
};
// Subtraction should return a non-negative number and not overflow
KOKKOS_FUNCTION static subtraction_failure check_subtraction(int64_t lhs,
int64_t rhs) {
if (lhs < rhs) return subtraction_failure::negative;
if (static_cast<uint64_t>(-1) / static_cast<uint64_t>(2) <
static_cast<uint64_t>(lhs) - static_cast<uint64_t>(rhs))
return subtraction_failure::overflow;
return subtraction_failure::none;
}
// Need a way to get at an element from both begins_type (aka Kokkos::Array
// which doesn't have iterators) and index_list_type (aka
// std::initializer_list which doesn't have .data() or operator[]).
// Returns by value
KOKKOS_FUNCTION
static int64_t at(const begins_type& a, size_t pos) { return a[pos]; }
KOKKOS_FUNCTION
static int64_t at(index_list_type a, size_t pos) {
return *(a.begin() + pos);
}
// Check that begins < ends for all elements
// B, E can be begins_type and/or index_list_type
template <typename B, typename E>
static subtraction_failure runtime_check_begins_ends_host(const B& begins,
const E& ends) {
std::string message;
if (begins.size() != Rank)
message +=
"begins.size() "
"(" +
std::to_string(begins.size()) +
")"
" != Rank "
"(" +
std::to_string(Rank) +
")"
"\n";
if (ends.size() != Rank)
message +=
"ends.size() "
"(" +
std::to_string(begins.size()) +
")"
" != Rank "
"(" +
std::to_string(Rank) +
")"
"\n";
// If there are no errors so far, then arg_rank == Rank
// Otherwise, check as much as possible
size_t arg_rank = begins.size() < ends.size() ? begins.size() : ends.size();
for (size_t i = 0; i != arg_rank; ++i) {
subtraction_failure sf = check_subtraction(at(ends, i), at(begins, i));
if (sf != subtraction_failure::none) {
message +=
"("
"ends[" +
std::to_string(i) +
"]"
" "
"(" +
std::to_string(at(ends, i)) +
")"
" - "
"begins[" +
std::to_string(i) +
"]"
" "
"(" +
std::to_string(at(begins, i)) +
")"
")";
switch (sf) {
case subtraction_failure::negative:
message += " must be non-negative\n";
break;
case subtraction_failure::overflow: message += " overflows\n"; break;
default: break;
}
}
}
if (!message.empty()) {
message =
"Kokkos::Experimental::OffsetView ERROR: for unmanaged OffsetView\n" +
message;
Kokkos::Impl::throw_runtime_exception(message);
}
return subtraction_failure::none;
}
// Check the begins < ends for all elements
template <typename B, typename E>
KOKKOS_FUNCTION static subtraction_failure runtime_check_begins_ends_device(
const B& begins, const E& ends) {
if (begins.size() != Rank)
Kokkos::abort(
"Kokkos::Experimental::OffsetView ERROR: for unmanaged "
"OffsetView: begins has bad Rank");
if (ends.size() != Rank)
Kokkos::abort(
"Kokkos::Experimental::OffsetView ERROR: for unmanaged "
"OffsetView: ends has bad Rank");
for (size_t i = 0; i != begins.size(); ++i) {
switch (check_subtraction(at(ends, i), at(begins, i))) {
case subtraction_failure::negative:
Kokkos::abort(
"Kokkos::Experimental::OffsetView ERROR: for unmanaged "
"OffsetView: bad range");
break;