73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/***************************************************************************************************
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* Copyright (c) 2024 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************************************/
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#pragma once
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#include <cute/config.hpp>
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#include <cute/arch/copy.hpp>
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#if defined(__CUDA_ARCH__) && __CUDA_ARCH__ >= 500
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#define CUTE_ARCH_WARP_SHUFFLE_ENABLED 1
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#endif
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namespace cute
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{
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struct SM50_Shuffle_U32_2x2Trans
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{
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using SRegisters = uint32_t[2];
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using DRegisters = uint32_t[2];
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CUTE_HOST_DEVICE static void
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copy(uint32_t const& src0, uint32_t const& src1, uint32_t& dst0, uint32_t& dst1)
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{
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#if defined(CUTE_ARCH_WARP_SHUFFLE_ENABLED)
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uint32_t x0 = src0;
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uint32_t y0 = __shfl_xor_sync(0xffffffff, x0, 1);
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uint32_t x1 = src1;
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uint32_t y1 = __shfl_xor_sync(0xffffffff, x1, 1);
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if (threadIdx.x % 2 == 0) {
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dst1 = y0;
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}
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else {
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dst0 = y1;
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}
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#else
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CUTE_INVALID_CONTROL_PATH("Trying to use __shfl_xor_sync without CUTE_ARCH_WARP_SHUFFLE_ENABLED.");
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#endif
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}
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};
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} // end namespace cute
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