| /* |
| * 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 int tIntBy, unsigned int BlockBy, bool Transposed, size_t TOutSize, size_t TInSize, bool sve> |
| 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) { |
| // For SVE cases we multiply the interleave factor by the vector length. |
| const unsigned int IntBy = tIntBy * (sve ? get_vector_length<TOut>() : 1); |
| |
| 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, bool sve=false, 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), sve>::Transform( |
| out, in, stride, k0, kmax, x0, xmax |
| ); |
| } |
| /*****************************************************************************/ |
| |
| #include "transforms/list.hpp" |