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Kokkos_ViewMapping.hpp
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Kokkos_ViewMapping.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_EXPERIMENTAL_VIEW_MAPPING_HPP
#define KOKKOS_EXPERIMENTAL_VIEW_MAPPING_HPP
#include <type_traits>
#include <initializer_list>
#include <Kokkos_Core_fwd.hpp>
#include <Kokkos_DetectionIdiom.hpp>
#include <Kokkos_Pair.hpp>
#include <Kokkos_Layout.hpp>
#include <Kokkos_Extents.hpp>
#include <impl/Kokkos_Error.hpp>
#include <impl/Kokkos_Traits.hpp>
#include <impl/Kokkos_ViewTracker.hpp>
#include <impl/Kokkos_ViewCtor.hpp>
#include <impl/Kokkos_Atomic_View.hpp>
#include <impl/Kokkos_Tools.hpp>
#include <impl/Kokkos_StringManipulation.hpp>
#include <impl/Kokkos_ZeroMemset_fwd.hpp>
#include <impl/Kokkos_ViewDataAnalysis.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
struct ALL_t {
KOKKOS_INLINE_FUNCTION
constexpr const ALL_t& operator()() const { return *this; }
KOKKOS_INLINE_FUNCTION
constexpr bool operator==(const ALL_t&) const { return true; }
};
#ifdef KOKKOS_ENABLE_DEPRECATED_CODE_4
namespace Impl {
// TODO This alias declaration forces us to fully qualify ALL_t inside the
// Kokkos::Impl namespace to avoid deprecation warnings. Replace the
// fully-qualified name when we remove Kokkos::Impl::ALL_t.
using ALL_t KOKKOS_DEPRECATED_WITH_COMMENT("Use Kokkos::ALL_t instead!") =
Kokkos::ALL_t;
} // namespace Impl
#endif
} // namespace Kokkos
namespace Kokkos {
namespace Impl {
template <class T>
struct is_integral_extent_type {
enum : bool { value = std::is_same<T, Kokkos::ALL_t>::value ? 1 : 0 };
};
template <class iType>
struct is_integral_extent_type<std::pair<iType, iType>> {
enum : bool { value = std::is_integral<iType>::value ? 1 : 0 };
};
template <class iType>
struct is_integral_extent_type<Kokkos::pair<iType, iType>> {
enum : bool { value = std::is_integral<iType>::value ? 1 : 0 };
};
// Assuming '2 == initializer_list<iType>::size()'
template <class iType>
struct is_integral_extent_type<std::initializer_list<iType>> {
enum : bool { value = std::is_integral<iType>::value ? 1 : 0 };
};
template <unsigned I, class... Args>
struct is_integral_extent {
// get_type is void when sizeof...(Args) <= I
using type = std::remove_cv_t<std::remove_reference_t<
typename Kokkos::Impl::get_type<I, Args...>::type>>;
enum : bool { value = is_integral_extent_type<type>::value };
static_assert(value || std::is_integral<type>::value ||
std::is_void<type>::value,
"subview argument must be either integral or integral extent");
};
// Rules for subview arguments and layouts matching
template <class LayoutDest, class LayoutSrc, int RankDest, int RankSrc,
int CurrentArg, class... SubViewArgs>
struct SubviewLegalArgsCompileTime;
// Rules which allow LayoutLeft to LayoutLeft assignment
template <int RankDest, int RankSrc, int CurrentArg, class Arg,
class... SubViewArgs>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutLeft, Kokkos::LayoutLeft,
RankDest, RankSrc, CurrentArg, Arg,
SubViewArgs...> {
enum {
value = (((CurrentArg == RankDest - 1) &&
(Kokkos::Impl::is_integral_extent_type<Arg>::value)) ||
((CurrentArg >= RankDest) && (std::is_integral<Arg>::value)) ||
((CurrentArg < RankDest) &&
(std::is_same<Arg, Kokkos::ALL_t>::value)) ||
((CurrentArg == 0) &&
(Kokkos::Impl::is_integral_extent_type<Arg>::value))) &&
(SubviewLegalArgsCompileTime<Kokkos::LayoutLeft, Kokkos::LayoutLeft,
RankDest, RankSrc, CurrentArg + 1,
SubViewArgs...>::value)
};
};
template <int RankDest, int RankSrc, int CurrentArg, class Arg>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutLeft, Kokkos::LayoutLeft,
RankDest, RankSrc, CurrentArg, Arg> {
enum {
value = ((CurrentArg == RankDest - 1) || (std::is_integral<Arg>::value)) &&
(CurrentArg == RankSrc - 1)
};
};
// Rules which allow LayoutRight to LayoutRight assignment
template <int RankDest, int RankSrc, int CurrentArg, class Arg,
class... SubViewArgs>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutRight, Kokkos::LayoutRight,
RankDest, RankSrc, CurrentArg, Arg,
SubViewArgs...> {
enum {
value = (((CurrentArg == RankSrc - RankDest) &&
(Kokkos::Impl::is_integral_extent_type<Arg>::value)) ||
((CurrentArg < RankSrc - RankDest) &&
(std::is_integral<Arg>::value)) ||
((CurrentArg >= RankSrc - RankDest) &&
(std::is_same<Arg, Kokkos::ALL_t>::value))) &&
(SubviewLegalArgsCompileTime<Kokkos::LayoutRight,
Kokkos::LayoutRight, RankDest, RankSrc,
CurrentArg + 1, SubViewArgs...>::value)
};
};
template <int RankDest, int RankSrc, int CurrentArg, class Arg>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutRight, Kokkos::LayoutRight,
RankDest, RankSrc, CurrentArg, Arg> {
enum {
value = ((CurrentArg == RankSrc - 1) &&
(std::is_same<Arg, Kokkos::ALL_t>::value))
};
};
// Rules which allow assignment to LayoutStride
template <int RankDest, int RankSrc, int CurrentArg, class... SubViewArgs>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutStride, Kokkos::LayoutLeft,
RankDest, RankSrc, CurrentArg,
SubViewArgs...> {
enum : bool { value = true };
};
template <int RankDest, int RankSrc, int CurrentArg, class... SubViewArgs>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutStride, Kokkos::LayoutRight,
RankDest, RankSrc, CurrentArg,
SubViewArgs...> {
enum : bool { value = true };
};
template <int RankDest, int RankSrc, int CurrentArg, class... SubViewArgs>
struct SubviewLegalArgsCompileTime<Kokkos::LayoutStride, Kokkos::LayoutStride,
RankDest, RankSrc, CurrentArg,
SubViewArgs...> {
enum : bool { value = true };
};
template <unsigned DomainRank, unsigned RangeRank>
struct SubviewExtents {
private:
// Cannot declare zero-length arrays
// '+' is used to silence GCC 7.2.0 -Wduplicated-branches warning when
// RangeRank=1
enum { InternalRangeRank = RangeRank ? RangeRank : +1u };
size_t m_begin[DomainRank];
size_t m_length[InternalRangeRank];
unsigned m_index[InternalRangeRank];
template <size_t... DimArgs>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned, unsigned,
const ViewDimension<DimArgs...>&) {
return true;
}
template <class T, size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned domain_rank,
unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const T& val, Args... args) {
const size_t v = static_cast<size_t>(val);
m_begin[domain_rank] = v;
return set(domain_rank + 1, range_rank, dim, args...)
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
&& (v < dim.extent(domain_rank))
#endif
;
}
// ALL_t
template <size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned domain_rank,
unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
Kokkos::ALL_t, Args... args) {
m_begin[domain_rank] = 0;
m_length[range_rank] = dim.extent(domain_rank);
m_index[range_rank] = domain_rank;
return set(domain_rank + 1, range_rank + 1, dim, args...);
}
// std::pair range
template <class T, size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned domain_rank,
unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const std::pair<T, T>& val,
Args... args) {
const size_t b = static_cast<size_t>(val.first);
const size_t e = static_cast<size_t>(val.second);
m_begin[domain_rank] = b;
m_length[range_rank] = e - b;
m_index[range_rank] = domain_rank;
return set(domain_rank + 1, range_rank + 1, dim, args...)
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
&& (e <= b + dim.extent(domain_rank))
#endif
;
}
// Kokkos::pair range
template <class T, size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned domain_rank,
unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const Kokkos::pair<T, T>& val,
Args... args) {
const size_t b = static_cast<size_t>(val.first);
const size_t e = static_cast<size_t>(val.second);
m_begin[domain_rank] = b;
m_length[range_rank] = e - b;
m_index[range_rank] = domain_rank;
return set(domain_rank + 1, range_rank + 1, dim, args...)
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
&& (e <= b + dim.extent(domain_rank))
#endif
;
}
// { begin , end } range
template <class T, size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION bool set(unsigned domain_rank,
unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const std::initializer_list<T>& val,
Args... args) {
const size_t b = static_cast<size_t>(val.begin()[0]);
const size_t e = static_cast<size_t>(val.begin()[1]);
m_begin[domain_rank] = b;
m_length[range_rank] = e - b;
m_index[range_rank] = domain_rank;
return set(domain_rank + 1, range_rank + 1, dim, args...)
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
&& (val.size() == 2) && (e <= b + dim.extent(domain_rank))
#endif
;
}
//------------------------------
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
template <size_t... DimArgs>
void error(char*, int, unsigned, unsigned,
const ViewDimension<DimArgs...>&) const {}
template <class T, size_t... DimArgs, class... Args>
void error(char* buf, int buf_len, unsigned domain_rank, unsigned range_rank,
const ViewDimension<DimArgs...>& dim, const T& val,
Args... args) const {
const int n = std::min(
buf_len,
snprintf(buf, buf_len, " %lu < %lu %c", static_cast<unsigned long>(val),
static_cast<unsigned long>(dim.extent(domain_rank)),
int(sizeof...(Args) ? ',' : ')')));
error(buf + n, buf_len - n, domain_rank + 1, range_rank, dim, args...);
}
// std::pair range
template <size_t... DimArgs, class... Args>
void error(char* buf, int buf_len, unsigned domain_rank, unsigned range_rank,
const ViewDimension<DimArgs...>& dim, Kokkos::ALL_t,
Args... args) const {
const int n = std::min(buf_len, snprintf(buf, buf_len, " Kokkos::ALL %c",
int(sizeof...(Args) ? ',' : ')')));
error(buf + n, buf_len - n, domain_rank + 1, range_rank + 1, dim, args...);
}
// std::pair range
template <class T, size_t... DimArgs, class... Args>
void error(char* buf, int buf_len, unsigned domain_rank, unsigned range_rank,
const ViewDimension<DimArgs...>& dim, const std::pair<T, T>& val,
Args... args) const {
// d <= e - b
const int n = std::min(
buf_len, snprintf(buf, buf_len, " %lu <= %lu - %lu %c",
static_cast<unsigned long>(dim.extent(domain_rank)),
static_cast<unsigned long>(val.second),
static_cast<unsigned long>(val.first),
int(sizeof...(Args) ? ',' : ')')));
error(buf + n, buf_len - n, domain_rank + 1, range_rank + 1, dim, args...);
}
// Kokkos::pair range
template <class T, size_t... DimArgs, class... Args>
void error(char* buf, int buf_len, unsigned domain_rank, unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const Kokkos::pair<T, T>& val, Args... args) const {
// d <= e - b
const int n = std::min(
buf_len, snprintf(buf, buf_len, " %lu <= %lu - %lu %c",
static_cast<unsigned long>(dim.extent(domain_rank)),
static_cast<unsigned long>(val.second),
static_cast<unsigned long>(val.first),
int(sizeof...(Args) ? ',' : ')')));
error(buf + n, buf_len - n, domain_rank + 1, range_rank + 1, dim, args...);
}
// { begin , end } range
template <class T, size_t... DimArgs, class... Args>
void error(char* buf, int buf_len, unsigned domain_rank, unsigned range_rank,
const ViewDimension<DimArgs...>& dim,
const std::initializer_list<T>& val, Args... args) const {
// d <= e - b
int n = 0;
if (val.size() == 2) {
n = std::min(buf_len,
snprintf(buf, buf_len, " %lu <= %lu - %lu %c",
static_cast<unsigned long>(dim.extent(domain_rank)),
static_cast<unsigned long>(val.begin()[0]),
static_cast<unsigned long>(val.begin()[1]),
int(sizeof...(Args) ? ',' : ')')));
} else {
n = std::min(buf_len, snprintf(buf, buf_len, " { ... }.size() == %u %c",
unsigned(val.size()),
int(sizeof...(Args) ? ',' : ')')));
}
error(buf + n, buf_len - n, domain_rank + 1, range_rank + 1, dim, args...);
}
template <size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION void error(const ViewDimension<DimArgs...>& dim,
Args... args) const {
KOKKOS_IF_ON_HOST(
(enum {LEN = 1024}; char buffer[LEN];
const int n = snprintf(buffer, LEN, "Kokkos::subview bounds error (");
error(buffer + n, LEN - n, 0, 0, dim, args...);
Kokkos::Impl::throw_runtime_exception(std::string(buffer));))
KOKKOS_IF_ON_DEVICE(((void)dim;
Kokkos::abort("Kokkos::subview bounds error");
[](Args...) {}(args...);))
}
#else
template <size_t... DimArgs, class... Args>
KOKKOS_FORCEINLINE_FUNCTION void error(const ViewDimension<DimArgs...>&,
Args...) const {}
#endif
public:
template <size_t... DimArgs, class... Args>
KOKKOS_INLINE_FUNCTION SubviewExtents(const ViewDimension<DimArgs...>& dim,
Args... args) {
static_assert(DomainRank == sizeof...(DimArgs));
static_assert(DomainRank == sizeof...(Args));
// Verifies that all arguments, up to 8, are integral types,
// integral extents, or don't exist.
static_assert(RangeRank ==
unsigned(is_integral_extent<0, Args...>::value) +
unsigned(is_integral_extent<1, Args...>::value) +
unsigned(is_integral_extent<2, Args...>::value) +
unsigned(is_integral_extent<3, Args...>::value) +
unsigned(is_integral_extent<4, Args...>::value) +
unsigned(is_integral_extent<5, Args...>::value) +
unsigned(is_integral_extent<6, Args...>::value) +
unsigned(is_integral_extent<7, Args...>::value));
if (RangeRank == 0) {
m_length[0] = 0;
m_index[0] = ~0u;
}
if (!set(0, 0, dim, args...)) error(dim, args...);
}
template <typename iType>
KOKKOS_FORCEINLINE_FUNCTION constexpr size_t domain_offset(
const iType i) const {
return unsigned(i) < DomainRank ? m_begin[i] : 0;
}
template <typename iType>
KOKKOS_FORCEINLINE_FUNCTION constexpr size_t range_extent(
const iType i) const {
return unsigned(i) < InternalRangeRank ? m_length[i] : 0;
}
template <typename iType>
KOKKOS_FORCEINLINE_FUNCTION constexpr unsigned range_index(
const iType i) const {
return unsigned(i) < InternalRangeRank ? m_index[i] : ~0u;
}
};
} // namespace Impl
} // namespace Kokkos
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
//----------------------------------------------------------------------------
// LayoutLeft AND ( 1 >= rank OR 0 == rank_dynamic ) : no padding / striding
template <class Dimension>
struct ViewOffset<
Dimension, Kokkos::LayoutLeft,
std::enable_if_t<(1 >= Dimension::rank || 0 == Dimension::rank_dynamic)>> {
using is_mapping_plugin = std::true_type;
using is_regular = std::true_type;
using size_type = size_t;
using dimension_type = Dimension;
using array_layout = Kokkos::LayoutLeft;
dimension_type m_dim;
//----------------------------------------
// rank 1
template <typename I0>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0) const {
return i0;
}
// rank 2
template <typename I0, typename I1>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1) const {
return i0 + m_dim.N0 * i1;
}
// rank 3
template <typename I0, typename I1, typename I2>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2) const {
return i0 + m_dim.N0 * (i1 + m_dim.N1 * i2);
}
// rank 4
template <typename I0, typename I1, typename I2, typename I3>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2,
I3 const& i3) const {
return i0 + m_dim.N0 * (i1 + m_dim.N1 * (i2 + m_dim.N2 * i3));
}
// rank 5
template <typename I0, typename I1, typename I2, typename I3, typename I4>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2,
I3 const& i3,
I4 const& i4) const {
return i0 +
m_dim.N0 * (i1 + m_dim.N1 * (i2 + m_dim.N2 * (i3 + m_dim.N3 * i4)));
}
// rank 6
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5) const {
return i0 +
m_dim.N0 *
(i1 +
m_dim.N1 *
(i2 + m_dim.N2 * (i3 + m_dim.N3 * (i4 + m_dim.N4 * i5))));
}
// rank 7
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5, I6 const& i6) const {
return i0 +
m_dim.N0 *
(i1 + m_dim.N1 *
(i2 + m_dim.N2 *
(i3 + m_dim.N3 *
(i4 + m_dim.N4 *
(i5 + m_dim.N5 * i6)))));
}
// rank 8
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6, typename I7>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5, I6 const& i6, I7 const& i7) const {
return i0 +
m_dim.N0 *
(i1 +
m_dim.N1 *
(i2 + m_dim.N2 *
(i3 + m_dim.N3 *
(i4 + m_dim.N4 *
(i5 + m_dim.N5 *
(i6 + m_dim.N6 *
i7))))));
}
//----------------------------------------
KOKKOS_INLINE_FUNCTION
constexpr array_layout layout() const {
constexpr auto r = dimension_type::rank;
return array_layout((r > 0 ? m_dim.N0 : KOKKOS_INVALID_INDEX),
(r > 1 ? m_dim.N1 : KOKKOS_INVALID_INDEX),
(r > 2 ? m_dim.N2 : KOKKOS_INVALID_INDEX),
(r > 3 ? m_dim.N3 : KOKKOS_INVALID_INDEX),
(r > 4 ? m_dim.N4 : KOKKOS_INVALID_INDEX),
(r > 5 ? m_dim.N5 : KOKKOS_INVALID_INDEX),
(r > 6 ? m_dim.N6 : KOKKOS_INVALID_INDEX),
(r > 7 ? m_dim.N7 : KOKKOS_INVALID_INDEX));
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_0() const {
return m_dim.N0;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_1() const {
return m_dim.N1;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_2() const {
return m_dim.N2;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_3() const {
return m_dim.N3;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_4() const {
return m_dim.N4;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_5() const {
return m_dim.N5;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_6() const {
return m_dim.N6;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_7() const {
return m_dim.N7;
}
/* Cardinality of the domain index space */
KOKKOS_INLINE_FUNCTION
constexpr size_type size() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 *
m_dim.N5 * m_dim.N6 * m_dim.N7;
}
/* Span of the range space */
KOKKOS_INLINE_FUNCTION
constexpr size_type span() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 *
m_dim.N5 * m_dim.N6 * m_dim.N7;
}
KOKKOS_INLINE_FUNCTION constexpr bool span_is_contiguous() const {
return true;
}
/* Strides of dimensions */
KOKKOS_INLINE_FUNCTION constexpr size_type stride_0() const { return 1; }
KOKKOS_INLINE_FUNCTION constexpr size_type stride_1() const {
return m_dim.N0;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_2() const {
return size_type(m_dim.N0) * m_dim.N1;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_3() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_4() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_5() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_6() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 *
m_dim.N5;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_7() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 *
m_dim.N5 * m_dim.N6;
}
// Fill the target unbounded array s with the stride.
// This method differs from stride() in that it does not write the total
// length to the last index of the array. Preconditions: s must be an array of
// dimension_type::rank elements
template <typename iType>
KOKKOS_INLINE_FUNCTION iType stride_fill(iType* const s) const {
iType n = 1;
if constexpr (0 < dimension_type::rank) {
s[0] = n;
n *= m_dim.N0;
}
if constexpr (1 < dimension_type::rank) {
s[1] = n;
n *= m_dim.N1;
}
if constexpr (1 < dimension_type::rank) {
s[2] = n;
n *= m_dim.N2;
}
if constexpr (3 < dimension_type::rank) {
s[3] = n;
n *= m_dim.N3;
}
if constexpr (4 < dimension_type::rank) {
s[4] = n;
n *= m_dim.N4;
}
if constexpr (5 < dimension_type::rank) {
s[5] = n;
n *= m_dim.N5;
}
if constexpr (6 < dimension_type::rank) {
s[6] = n;
n *= m_dim.N6;
}
if constexpr (7 < dimension_type::rank) {
s[7] = n;
n *= m_dim.N7;
}
return n;
}
// Fill the target unbounded array s with the stride and the total spanned
// size. This method differs from stride_fill() in that it writes the total
// spanned size to the last index of the array. Preconditions: s must be an
// array of dimension_type::rank + 1 elements Stride with [ rank ] value is
// the total length
template <typename iType>
KOKKOS_INLINE_FUNCTION void stride(iType* const s) const {
s[dimension_type::rank] = stride_fill(s);
}
//----------------------------------------
// MSVC (16.5.5) + CUDA (10.2) did not generate the defaulted functions
// correct and errors out during compilation. Same for the other places where
// I changed this.
#ifdef KOKKOS_IMPL_WINDOWS_CUDA
KOKKOS_FUNCTION ViewOffset() : m_dim(dimension_type()) {}
KOKKOS_FUNCTION ViewOffset(const ViewOffset& src) { m_dim = src.m_dim; }
KOKKOS_FUNCTION ViewOffset& operator=(const ViewOffset& src) {
m_dim = src.m_dim;
return *this;
}
#else
ViewOffset() = default;
ViewOffset(const ViewOffset&) = default;
ViewOffset& operator=(const ViewOffset&) = default;
#endif
template <unsigned TrivialScalarSize>
KOKKOS_INLINE_FUNCTION constexpr ViewOffset(
std::integral_constant<unsigned, TrivialScalarSize> const&,
Kokkos::LayoutLeft const& arg_layout)
: m_dim(arg_layout.dimension[0], 0, 0, 0, 0, 0, 0, 0) {}
template <class DimRHS>
KOKKOS_INLINE_FUNCTION constexpr ViewOffset(
const ViewOffset<DimRHS, Kokkos::LayoutLeft, void>& rhs)
: m_dim(rhs.m_dim.N0, rhs.m_dim.N1, rhs.m_dim.N2, rhs.m_dim.N3,
rhs.m_dim.N4, rhs.m_dim.N5, rhs.m_dim.N6, rhs.m_dim.N7) {
static_assert(int(DimRHS::rank) == int(dimension_type::rank),
"ViewOffset assignment requires equal rank");
// Also requires equal static dimensions ...
}
template <class DimRHS>
KOKKOS_INLINE_FUNCTION constexpr ViewOffset(
const ViewOffset<DimRHS, Kokkos::LayoutRight, void>& rhs)
: m_dim(rhs.m_dim.N0, 0, 0, 0, 0, 0, 0, 0) {
static_assert(((DimRHS::rank == 0 && dimension_type::rank == 0) ||
(DimRHS::rank == 1 && dimension_type::rank == 1)),
"ViewOffset LayoutLeft and LayoutRight are only compatible "
"when rank <= 1");
}
template <class DimRHS>
KOKKOS_INLINE_FUNCTION ViewOffset(
const ViewOffset<DimRHS, Kokkos::LayoutStride, void>& rhs)
: m_dim(rhs.m_dim.N0, 0, 0, 0, 0, 0, 0, 0) {
if (rhs.m_stride.S0 != 1) {
Kokkos::abort(
"Kokkos::Impl::ViewOffset assignment of LayoutLeft from LayoutStride "
" requires stride == 1");
}
}
//----------------------------------------
// Subview construction
template <class DimRHS>
KOKKOS_INLINE_FUNCTION constexpr ViewOffset(
const ViewOffset<DimRHS, Kokkos::LayoutLeft, void>&,
const SubviewExtents<DimRHS::rank, dimension_type::rank>& sub)
: m_dim(sub.range_extent(0), 0, 0, 0, 0, 0, 0, 0) {
static_assert((0 == dimension_type::rank_dynamic) ||
(1 == dimension_type::rank &&
1 == dimension_type::rank_dynamic && 1 <= DimRHS::rank),
"ViewOffset subview construction requires compatible rank");
}
};
//----------------------------------------------------------------------------
// LayoutLeft AND ( 1 < rank AND 0 < rank_dynamic ) : has padding / striding
template <class Dimension>
struct ViewOffset<
Dimension, Kokkos::LayoutLeft,
std::enable_if_t<(1 < Dimension::rank && 0 < Dimension::rank_dynamic)>> {
using is_mapping_plugin = std::true_type;
using is_regular = std::true_type;
using size_type = size_t;
using dimension_type = Dimension;
using array_layout = Kokkos::LayoutLeft;
dimension_type m_dim;
size_type m_stride;
//----------------------------------------
// rank 1
template <typename I0>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0) const {
return i0;
}
// rank 2
template <typename I0, typename I1>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1) const {
return i0 + m_stride * i1;
}
// rank 3
template <typename I0, typename I1, typename I2>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2) const {
return i0 + m_stride * (i1 + m_dim.N1 * i2);
}
// rank 4
template <typename I0, typename I1, typename I2, typename I3>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2,
I3 const& i3) const {
return i0 + m_stride * (i1 + m_dim.N1 * (i2 + m_dim.N2 * i3));
}
// rank 5
template <typename I0, typename I1, typename I2, typename I3, typename I4>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(I0 const& i0,
I1 const& i1,
I2 const& i2,
I3 const& i3,
I4 const& i4) const {
return i0 +
m_stride * (i1 + m_dim.N1 * (i2 + m_dim.N2 * (i3 + m_dim.N3 * i4)));
}
// rank 6
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5) const {
return i0 +
m_stride *
(i1 +
m_dim.N1 *
(i2 + m_dim.N2 * (i3 + m_dim.N3 * (i4 + m_dim.N4 * i5))));
}
// rank 7
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5, I6 const& i6) const {
return i0 +
m_stride *
(i1 + m_dim.N1 *
(i2 + m_dim.N2 *
(i3 + m_dim.N3 *
(i4 + m_dim.N4 *
(i5 + m_dim.N5 * i6)))));
}
// rank 8
template <typename I0, typename I1, typename I2, typename I3, typename I4,
typename I5, typename I6, typename I7>
KOKKOS_INLINE_FUNCTION constexpr size_type operator()(
I0 const& i0, I1 const& i1, I2 const& i2, I3 const& i3, I4 const& i4,
I5 const& i5, I6 const& i6, I7 const& i7) const {
return i0 +
m_stride *
(i1 +
m_dim.N1 *
(i2 + m_dim.N2 *
(i3 + m_dim.N3 *
(i4 + m_dim.N4 *
(i5 + m_dim.N5 *
(i6 + m_dim.N6 *
i7))))));
}
//----------------------------------------
KOKKOS_INLINE_FUNCTION
constexpr array_layout layout() const {
constexpr auto r = dimension_type::rank;
return array_layout((r > 0 ? m_dim.N0 : KOKKOS_INVALID_INDEX),
(r > 1 ? m_dim.N1 : KOKKOS_INVALID_INDEX),
(r > 2 ? m_dim.N2 : KOKKOS_INVALID_INDEX),
(r > 3 ? m_dim.N3 : KOKKOS_INVALID_INDEX),
(r > 4 ? m_dim.N4 : KOKKOS_INVALID_INDEX),
(r > 5 ? m_dim.N5 : KOKKOS_INVALID_INDEX),
(r > 6 ? m_dim.N6 : KOKKOS_INVALID_INDEX),
(r > 7 ? m_dim.N7 : KOKKOS_INVALID_INDEX));
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_0() const {
return m_dim.N0;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_1() const {
return m_dim.N1;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_2() const {
return m_dim.N2;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_3() const {
return m_dim.N3;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_4() const {
return m_dim.N4;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_5() const {
return m_dim.N5;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_6() const {
return m_dim.N6;
}
KOKKOS_INLINE_FUNCTION constexpr size_type dimension_7() const {
return m_dim.N7;
}
/* Cardinality of the domain index space */
KOKKOS_INLINE_FUNCTION
constexpr size_type size() const {
return size_type(m_dim.N0) * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 *
m_dim.N5 * m_dim.N6 * m_dim.N7;
}
/* Span of the range space */
KOKKOS_INLINE_FUNCTION
constexpr size_type span() const {
return (m_dim.N0 > size_type(0) ? m_stride : size_type(0)) * m_dim.N1 *
m_dim.N2 * m_dim.N3 * m_dim.N4 * m_dim.N5 * m_dim.N6 * m_dim.N7;
}
KOKKOS_INLINE_FUNCTION constexpr bool span_is_contiguous() const {
return m_stride == m_dim.N0;
}
/* Strides of dimensions */
KOKKOS_INLINE_FUNCTION constexpr size_type stride_0() const { return 1; }
KOKKOS_INLINE_FUNCTION constexpr size_type stride_1() const {
return m_stride;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_2() const {
return m_stride * m_dim.N1;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_3() const {
return m_stride * m_dim.N1 * m_dim.N2;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_4() const {
return m_stride * m_dim.N1 * m_dim.N2 * m_dim.N3;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_5() const {
return m_stride * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_6() const {
return m_stride * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 * m_dim.N5;
}
KOKKOS_INLINE_FUNCTION constexpr size_type stride_7() const {
return m_stride * m_dim.N1 * m_dim.N2 * m_dim.N3 * m_dim.N4 * m_dim.N5 *
m_dim.N6;
}
// Fill the target unbounded array s with the stride.
// This method differs from stride() in that it does not write the total
// length to the last index of the array. Preconditions: s must be an array of
// dimension_type::rank elements
template <typename iType>
KOKKOS_INLINE_FUNCTION iType stride_fill(iType* const s) const {
iType n = 1;
if constexpr (0 < dimension_type::rank) {
s[0] = n;
n *= m_stride;
}
if constexpr (1 < dimension_type::rank) {
s[1] = n;
n *= m_dim.N1;
}
if constexpr (2 < dimension_type::rank) {
s[2] = n;
n *= m_dim.N2;
}
if constexpr (3 < dimension_type::rank) {
s[3] = n;
n *= m_dim.N3;
}
if constexpr (4 < dimension_type::rank) {
s[4] = n;
n *= m_dim.N4;
}
if constexpr (5 < dimension_type::rank) {
s[5] = n;
n *= m_dim.N5;
}
if constexpr (6 < dimension_type::rank) {
s[6] = n;
n *= m_dim.N6;
}
if constexpr (7 < dimension_type::rank) {
s[7] = n;
n *= m_dim.N7;
}
return n;
}