Brandon Potter
80 строки
2.8 KiB
C++
80 строки
2.8 KiB
C++
/******************************************************************************
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* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*****************************************************************************/
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#include "endian.hpp"
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namespace rocshmem {
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template <typename T>
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__device__ void swap_endian_store(T *dst, const T val) {
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typedef union U {
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T val;
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uint8_t bytes[sizeof(T)];
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} union_type;
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union_type src;
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union_type dst_tmp;
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src.val = val;
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std::reverse_copy(src.bytes, src.bytes + sizeof(T), dst_tmp.bytes);
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*dst = dst_tmp.val;
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}
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template <>
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__device__ void swap_endian_store(uint64_t *dst, const uint64_t val) {
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uint64_t new_val = ((val << 8) & 0xFF00FF00FF00FF00ULL) |
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((val >> 8) & 0x00FF00FF00FF00FFULL);
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new_val = ((new_val << 16) & 0xFFFF0000FFFF0000ULL) |
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((new_val >> 16) & 0x0000FFFF0000FFFFULL);
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*dst = (new_val << 32) | (new_val >> 32);
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}
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template <>
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__device__ void swap_endian_store(int64_t *dst, const int64_t val) {
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swap_endian_store(reinterpret_cast<uint64_t *>(dst), (const uint64_t)val);
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}
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template <>
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__device__ void swap_endian_store(uint32_t *dst, const uint32_t val) {
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uint32_t new_val = ((val << 8) & 0xFF00FF00) | ((val >> 8) & 0xFF00FF);
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*dst = (new_val << 16) | (new_val >> 16);
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}
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template <>
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__device__ void swap_endian_store(int32_t *dst, const int32_t val) {
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swap_endian_store(reinterpret_cast<uint32_t *>(dst), (const uint32_t)val);
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}
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template <>
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__device__ void swap_endian_store(uint16_t *dst, const uint16_t val) {
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*dst = ((val << 8) & 0xFF00) | ((val >> 8) & 0x00FF);
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}
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template <>
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__device__ void swap_endian_store(int16_t *dst, const int16_t val) {
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swap_endian_store(reinterpret_cast<uint16_t *>(dst), (const uint16_t)val);
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}
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} // namespace rocshmem
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