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/***************************************************************************************************
* Copyright (c) 2017 - 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.
*
**************************************************************************************************/
/*! \file
\brief Basic copy routines for tensor views
*/
#pragma once
namespace cutlass {
namespace transform {
namespace thread {
/// Transforms a fragment by doing a transpose
template <
int ElementCount,
typename TransposeShape,
typename Element
> struct Transpose;
/// Specialization for int8_t 4x4 transpose
template <int ElementCount_>
struct Transpose<ElementCount_, layout::PitchLinearShape<4,4> , int8_t> {
static const int kElementCount = ElementCount_;
using TransposeShape = layout::PitchLinearShape<4,4>;
using Element = int8_t;
using Fragment = cutlass::Array<Element, kElementCount>;
static_assert(!(kElementCount % TransposeShape::kCount), "Shape needs to be multiple of 16 elements to do a 4x4 transpose");
CUTLASS_DEVICE
void transform(Fragment& dst, Fragment& src) {
// Expose src/dst as int arrays.
int* src_int = reinterpret_cast<int*>(&src);
int* dst_int = reinterpret_cast<int*>(&dst);
CUTLASS_PRAGMA_UNROLL
for (int i = 0; i < kElementCount / TransposeShape::kCount; i++){
int const i0 = 4 * i + 0;
int const i1 = 4 * i + 1;
int const i2 = 4 * i + 2;
int const i3 = 4 * i + 3;
int a0 = src_int[i0];
int a1 = src_int[i1];
int a2 = src_int[i2];
int a3 = src_int[i3];
int b0, b1, b2, b3, c0;
b0 = __byte_perm(a0, a1, 0x0040);
c0 = __byte_perm(a2, a3, 0x0040);
b0 = __byte_perm(b0, c0, 0x5410);
b1 = __byte_perm(a0, a1, 0x0051);
c0 = __byte_perm(a2, a3, 0x0051);
b1 = __byte_perm(b1, c0, 0x5410);
b2 = __byte_perm(a0, a1, 0x0062);
c0 = __byte_perm(a2, a3, 0x0062);
b2 = __byte_perm(b2, c0, 0x5410);
b3 = __byte_perm(a0, a1, 0x0073);
c0 = __byte_perm(a2, a3, 0x0073);
b3 = __byte_perm(b3, c0, 0x5410);
dst_int[i0] = b0;
dst_int[i1] = b1;
dst_int[i2] = b2;
dst_int[i3] = b3;
}
}
};
} // namespace thread
} // namespace layout
} // namespace cutlass
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