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