diff options
Diffstat (limited to 'src/core/NEON/kernels/arm_gemm/transform.hpp')
| -rw-r--r-- | src/core/NEON/kernels/arm_gemm/transform.hpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/core/NEON/kernels/arm_gemm/transform.hpp b/src/core/NEON/kernels/arm_gemm/transform.hpp new file mode 100644 index 0000000000..c80bb59941 --- /dev/null +++ b/src/core/NEON/kernels/arm_gemm/transform.hpp @@ -0,0 +1,122 @@ +/* + * Copyright (c) 2017-2018 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#pragma once + +/* + * Generic transform. + * + * Assuming the untransposed case, this works by first reading <BlockBy> + * consecutive values from the first input row. This same number of values + * are then read from the next <IntBy-1> rows. Now return to the first + * input row and repeat. + * + * Need to cope with the work requested in either dimension not actually + * being a multiple of the block sizes. + */ +template <unsigned IntBy, unsigned int BlockBy, bool Transposed, size_t TOutSize, size_t TInSize> +struct TransformImpl +{ + template <typename TOut, typename TIn> + static void Transform(TOut *out, const TIn *const in, const int stride, + const int y0, const int ymax, const int x0, const int xmax) + { + const int n_whole_y_blocks = (ymax - y0) / IntBy; + const int y_remainders = (ymax - y0) % IntBy; + const int n_y_blocks = n_whole_y_blocks + (y_remainders ? 1 : 0); + + const int n_whole_x_blocks = (xmax - x0) / BlockBy; + const int x_remainders = (xmax - x0) % BlockBy; + const int n_x_blocks = n_whole_x_blocks + (x_remainders ? 1 : 0); + + // "Y" loop: advance down the rows of the source IntBy rows at a time. + // Set up fill_rows to show the number rows to copy from, and blank_rows + // for the number of blank rows to add. + for(int y_block = 0; y_block < n_y_blocks; y_block++) + { + int fill_rows = (y_block < n_whole_y_blocks) ? IntBy : y_remainders; + int blank_rows = IntBy - fill_rows; + + int y_base = y0 + (y_block * IntBy); + + // So now advance along this block of rows, BlockBy columns at a time. + for(int x_block = 0; x_block < n_x_blocks; x_block++) + { + int fill_cols = (x_block < n_whole_x_blocks) ? BlockBy : x_remainders; + int blank_cols = BlockBy - fill_cols; + + int x_base = x0 + (x_block * BlockBy); + + for(int row = 0; row < fill_rows; row++) + { + for(int col = 0; col < fill_cols; col++) + { + // In-range copy. If it's transposed, we reverse the sense of rows and columns here. + if(Transposed) + { + *out++ = static_cast<TOut>(in[(x_base + col) * stride + y_base + row]); + } + else + { + *out++ = static_cast<TOut>(in[(y_base + row) * stride + x_base + col]); + } + } + // "col" tail - row is in range but column is out of range. + for(int col = 0; col < blank_cols; col++) + { + *out++ = static_cast<TOut>(0); + } + } + // "row" tail - row is out of range so fill with zeros always. + for(int row = 0; row < blank_rows; row++) + { + for(int col = 0; col < (fill_cols + blank_cols); col++) + { + *out++ = static_cast<TOut>(0); + } + } + } + } + } + + template <typename T> + static inline void Transform(T *out, const T *const in, const int stride, + const int k0, const int kmax, const int x0, const int xmax) + { + Transform<T, T>(out, in, stride, k0, kmax, x0, xmax); + } +}; + +/*****************************************************************************/ +template <unsigned int IntBy, unsigned int BlockBy, bool Transposed, typename TOut, typename TIn> +void Transform( + TOut *out, const TIn *const in, const int stride, + const int k0, const int kmax, const int x0, const int xmax) +{ + // Redirect to a specialised implementation predicated on argument size. + TransformImpl<IntBy, BlockBy, Transposed, sizeof(TOut), sizeof(TIn)>::Transform( + out, in, stride, k0, kmax, x0, xmax); +} +/*****************************************************************************/ + +#include "transforms/list.hpp" |