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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * GridTools | ||
| * | ||
| * Copyright (c) 2014-2023, ETH Zurich | ||
| * All rights reserved. | ||
| * | ||
| * Please, refer to the LICENSE file in the root directory. | ||
| * SPDX-License-Identifier: BSD-3-Clause | ||
| */ | ||
| #pragma once | ||
|
|
||
| #include <cstddef> | ||
| #include <type_traits> | ||
| #include <utility> | ||
|
|
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| #include "defs.hpp" | ||
| #include "host_device.hpp" | ||
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| #ifdef GT_CUDACC | ||
| #include "cuda_type_traits.hpp" | ||
| #endif | ||
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| namespace gridtools { | ||
|
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| #ifdef GT_CUDACC | ||
| namespace impl_ { | ||
|
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| template <class T> | ||
| struct ldg_ptr { | ||
| T const *m_ptr; | ||
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| static_assert(is_texture_type<T>::value); | ||
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| GT_FUNCTION constexpr T operator*() const { | ||
| #ifdef GT_CUDA_ARCH | ||
| return __ldg(m_ptr); | ||
| #else | ||
| return *m_ptr; | ||
| #endif | ||
| } | ||
|
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| GT_FUNCTION constexpr ldg_ptr &operator+=(std::ptrdiff_t diff) { | ||
| m_ptr += diff; | ||
| return *this; | ||
| } | ||
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| GT_FUNCTION constexpr ldg_ptr &operator-=(std::ptrdiff_t diff) { | ||
| m_ptr -= diff; | ||
| return *this; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr bool operator==(ldg_ptr const &a, ldg_ptr const &b) { | ||
| return a.m_ptr == b.m_ptr; | ||
| } | ||
| friend GT_FUNCTION constexpr bool operator==(ldg_ptr const &a, T const *b) { return a.m_ptr == b; } | ||
| friend GT_FUNCTION constexpr bool operator==(T const *a, ldg_ptr const &b) { return a == b.m_ptr; } | ||
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| friend GT_FUNCTION constexpr bool operator!=(ldg_ptr const &a, ldg_ptr const &b) { | ||
| return a.m_ptr != b.m_ptr; | ||
| } | ||
| friend GT_FUNCTION constexpr bool operator!=(ldg_ptr const &a, T const *b) { return a.m_ptr != b; } | ||
| friend GT_FUNCTION constexpr bool operator!=(T const *a, ldg_ptr const &b) { return a != b.m_ptr; } | ||
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| friend GT_FUNCTION constexpr ldg_ptr &operator++(ldg_ptr &ptr) { | ||
| ++ptr.m_ptr; | ||
| return ptr; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr ldg_ptr &operator--(ldg_ptr &ptr) { | ||
| --ptr.m_ptr; | ||
| return ptr; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr ldg_ptr operator++(ldg_ptr &ptr, int) { | ||
| ldg_ptr p = ptr; | ||
| ++ptr.m_ptr; | ||
| return p; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr ldg_ptr operator--(ldg_ptr &ptr, int) { | ||
| ldg_ptr p = ptr; | ||
| --ptr.m_ptr; | ||
| return p; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr ldg_ptr operator+(ldg_ptr const &ptr, std::ptrdiff_t diff) { | ||
| return {ptr.m_ptr + diff}; | ||
| } | ||
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| friend GT_FUNCTION constexpr ldg_ptr operator-(ldg_ptr const &ptr, std::ptrdiff_t diff) { | ||
| return {ptr.m_ptr - diff}; | ||
| } | ||
|
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| friend GT_FUNCTION constexpr std::ptrdiff_t operator-(ldg_ptr const &ptr, ldg_ptr const &other) { | ||
| return ptr.m_ptr - other.m_ptr; | ||
| } | ||
| }; | ||
| } // namespace impl_ | ||
|
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| template <class T> | ||
| GT_FUNCTION constexpr std::enable_if_t<is_texture_type<T>::value, impl_::ldg_ptr<T>> as_ldg_ptr(T const *ptr) { | ||
| return {ptr}; | ||
| } | ||
|
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| #endif | ||
|
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| template <class T> | ||
| GT_FUNCTION constexpr T &&as_ldg_ptr(T &&value) { | ||
| return std::forward<T>(value); | ||
| } | ||
|
|
||
| } // namespace gridtools |
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