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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
#include <Kokkos_Core.hpp>
#include <Kokkos_DynRankView.hpp>
// Duplicate from
// core/unit_test/view/TestViewCustomizationAccessorFromMapping.hpp
namespace Foo {
// ElementType which is actually just a tag type
struct BarStrided {};
// Reference type for Bar
struct BarRefStrided {
double* ptr{nullptr};
size_t size{0ul};
size_t stride{0ul};
KOKKOS_FUNCTION
double& operator[](size_t idx) const { return ptr[idx * stride]; }
};
// A TestAccessor mimicking some of what Sacado does
// Specifically:
// * returns a proxy reference
// * the underlying storage is of some basic scalar type
// * the size of the allocation does not actually come from
// sizeof(ElementType)
template <class ElementType, class MemorySpace>
struct TestAccessorStrided {
static_assert(std::is_same_v<std::remove_cv_t<ElementType>, BarStrided>);
using element_type = ElementType;
using reference = BarRefStrided;
using data_handle_type = Kokkos::Impl::ReferenceCountedDataHandle<
std::conditional_t<std::is_const_v<ElementType>, const double, double>,
MemorySpace>;
using offset_policy = TestAccessorStrided;
// View expects this from accessors right now
using memory_space = MemorySpace;
KOKKOS_DEFAULTED_FUNCTION
constexpr TestAccessorStrided() = default;
template <class OtherElementType,
std::enable_if_t<std::is_constructible_v<
Kokkos::default_accessor<element_type>,
Kokkos::default_accessor<OtherElementType>>,
int> = 0>
KOKKOS_FUNCTION constexpr TestAccessorStrided(
const TestAccessorStrided<OtherElementType, MemorySpace>& other) noexcept
: size(other.size), stride(other.stride) {}
KOKKOS_FUNCTION
TestAccessorStrided(const size_t val, const size_t s_val)
: size(val), stride(s_val) {}
KOKKOS_FUNCTION
constexpr reference access(
#ifndef KOKKOS_ENABLE_OPENACC
const data_handle_type& p,
#else
// FIXME OPENACC: illegal address when passing by reference
data_handle_type p,
#endif
size_t i) const noexcept {
return BarRefStrided{(p.get() + i), size, stride};
}
KOKKOS_FUNCTION
constexpr typename offset_policy::data_handle_type offset(
#ifndef KOKKOS_ENABLE_OPENACC
const data_handle_type& p,
#else
// FIXME OPENACC: illegal address when passing by reference
data_handle_type p,
#endif
size_t i) const noexcept {
return p + i;
}
size_t size{0lu};
size_t stride{0lu};
};
// Use the customization point to inject the custom accessor
template <class LayoutType, class DeviceType, class MemoryTraits>
constexpr auto customize_view_arguments(
Kokkos::Impl::ViewArguments<BarStrided, LayoutType, DeviceType,
MemoryTraits>) {
return Kokkos::Impl::ViewCustomArguments<
size_t,
TestAccessorStrided<BarStrided, typename DeviceType::memory_space>>{};
}
template <class LayoutType, class DeviceType, class MemoryTraits>
constexpr auto customize_view_arguments(
Kokkos::Impl::ViewArguments<const BarStrided, LayoutType, DeviceType,
MemoryTraits>) {
return Kokkos::Impl::ViewCustomArguments<
size_t, TestAccessorStrided<const BarStrided,
typename DeviceType::memory_space>>{};
}
// Customization point to compute allocation sizes
template <class MappingType, class ElementType, class MemorySpace>
KOKKOS_INLINE_FUNCTION size_t allocation_size_from_mapping_and_accessor(
const MappingType& map,
const TestAccessorStrided<ElementType, MemorySpace>& acc) {
return map.required_span_size() * acc.size;
}
// Customization point to create accessor from AccessorArg and Mapping
template <class ElementType, class MemorySpace, class MappingType>
KOKKOS_INLINE_FUNCTION constexpr auto accessor_from_mapping_and_accessor_arg(
Kokkos::Impl::AccessorTypeTag<
TestAccessorStrided<ElementType, MemorySpace>>,
const MappingType& map, const Kokkos::Impl::AccessorArg_t& acc_arg) {
return TestAccessorStrided<ElementType, MemorySpace>{
acc_arg.value, map.required_span_size()};
}
} // namespace Foo
// This tests the ability to pass in the accessor arg
// as an additional integral argument to constructor and shmem_size
TEST(TEST_CATEGORY, view_customization_extra_int_arg) {
using view_t = Kokkos::DynRankView<Foo::BarStrided, TEST_EXECSPACE>;
// Rank 0
{
view_t a("A", 5);
ASSERT_EQ(a.rank(), 0lu);
ASSERT_EQ(a.accessor().size, size_t(5));
ASSERT_EQ(a.accessor().stride, size_t(1));
view_t b(a.data(), 5);
ASSERT_EQ(b.rank(), 0lu);
ASSERT_EQ(b.accessor().size, 5lu);
ASSERT_EQ(b.accessor().stride, 1lu);
size_t shmem = view_t::shmem_size(5);
size_t expected_shmem_size = 5lu * sizeof(double) + sizeof(double);
ASSERT_EQ(shmem, expected_shmem_size);
}
// Rank 3
{
view_t a("A", 3, 7, 11, 5);
ASSERT_EQ(a.rank(), 3lu);
ASSERT_EQ(a.extent(0), 3lu);
ASSERT_EQ(a.extent(1), 7lu);
ASSERT_EQ(a.extent(2), 11lu);
ASSERT_EQ(a.accessor().size, 5lu);
ASSERT_EQ(a.accessor().stride, size_t(3 * 7 * 11));
view_t b(a.data(), 3, 7, 11, 5);
ASSERT_EQ(b.rank(), 3lu);
ASSERT_EQ(b.extent(0), 3lu);
ASSERT_EQ(b.extent(1), 7lu);
ASSERT_EQ(b.extent(2), 11lu);
ASSERT_EQ(b.accessor().size, 5lu);
ASSERT_EQ(b.accessor().stride, size_t(3 * 7 * 11));
size_t shmem = view_t::shmem_size(3, 7, 11, 5);
size_t expected_shmem_size =
3lu * 7lu * 11lu * 5lu * sizeof(double) + sizeof(double);
ASSERT_EQ(shmem, expected_shmem_size);
}
// Rank 6
{
view_t a("A", 2, 3, 2, 7, 2, 11, 5);
ASSERT_EQ(a.rank(), 6lu);
ASSERT_EQ(a.extent(0), 2lu);
ASSERT_EQ(a.extent(1), 3lu);
ASSERT_EQ(a.extent(2), 2lu);
ASSERT_EQ(a.extent(3), 7lu);
ASSERT_EQ(a.extent(4), 2lu);
ASSERT_EQ(a.extent(5), 11lu);
ASSERT_EQ(a.accessor().size, 5lu);
ASSERT_EQ(a.accessor().stride, size_t(8 * 3 * 7 * 11));
view_t b(a.data(), 2, 3, 2, 7, 2, 11, 5);
ASSERT_EQ(b.rank(), 6lu);
ASSERT_EQ(b.extent(0), 2lu);
ASSERT_EQ(b.extent(1), 3lu);
ASSERT_EQ(b.extent(2), 2lu);
ASSERT_EQ(b.extent(3), 7lu);
ASSERT_EQ(b.extent(4), 2lu);
ASSERT_EQ(b.extent(5), 11lu);
ASSERT_EQ(b.accessor().size, 5lu);
ASSERT_EQ(b.accessor().stride, size_t(8 * 3 * 7 * 11));
size_t shmem = view_t::shmem_size(2, 3, 2, 7, 2, 11, 5);
size_t expected_shmem_size =
2lu * 3lu * 2lu * 7lu * 2lu * 11lu * 5lu * sizeof(double) +
sizeof(double);
ASSERT_EQ(shmem, expected_shmem_size);
}
}
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