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-/*
- * Copyright (c) 2017-2019 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
-#include "arm_gemm_local.hpp"
-#include "arm_gemm.hpp"
-#include "winograd.hpp"
-
-namespace winograd
-{
-
-
-class IWinogradConvolutionLayer
-{
- public:
- virtual ~IWinogradConvolutionLayer() = default;
-
- virtual unsigned int weight_transform_get_window(void) const = 0;
- virtual void weight_transform_run(unsigned int start, unsigned int stop) = 0;
-
- virtual IInputTransform& input_transform(void) = 0; // Expose the input transform
- virtual IOutputTransform& output_transform(void) = 0; // Expose the output transform
- virtual arm_gemm::IGemmCommon *gemm(void) = 0; // Expose the underlying GEMM
-};
-
-/** Example of how to construct an ACL-like interface.
- *
- * Use `get_weight_storage_size`, `get_input_storage_size` and
- * `get_output_storage_size` to allocate memory for the convolution engine.
- * Then create a `WinogradConvolutionLayer`.
- *
- * Initialise the weights using `weights_transform.run(...)`.
- *
- * For each inference:
- * 1. Transform the inputs to the Winograd domain using `input_transform.run(...)`
- * 2. Perform a number of GEMMs using `gemms.run(...)`
- * 3. Transform the output to the spatial domain using `output_transform.run(...)`
- */
-template <int OutputTileRows, int OutputTileCols, int KernelRows, int KernelCols,
- typename TIn, typename TInGEMM, typename TOutGEMM, typename TOut,
- WinogradRoots Roots>
-class WinogradConvolutionLayer : public IWinogradConvolutionLayer
-{
- public:
- using WinogradBase = winograd::WinogradGEMM<OutputTileRows, OutputTileCols, KernelRows, KernelCols, Roots>;
- using WeightsTransform = typename WinogradBase::template WeightsTransform<TIn, TInGEMM>;
- using InputTransform = typename WinogradBase::template InputTransform<TIn, TInGEMM>;
- using WinogradConv = typename WinogradBase::template Convolution<TOut, TIn, TInGEMM, TOutGEMM>;
- using OutputTransform = typename WinogradBase::template OutputTransform<TOutGEMM, TOut>;
-
- private:
- static constexpr int InnerTileRows = OutputTileRows + KernelRows - 1;
- static constexpr int InnerTileCols = OutputTileCols + KernelCols - 1;
- static constexpr int N_GEMMS = InnerTileRows * InnerTileCols;
-
- const int _n_output_rows, _n_output_cols;
- const int _kernel_matrix_stride, _kernel_matrix_row_stride;
- const int _input_matrix_stride, _input_matrix_row_stride;
- const int _output_matrix_stride, _output_matrix_row_stride;
- const int _tile_rows, _tile_cols;
- const int _m, _k, _n;
-
- WeightsTransform weights_transform; /** Operator to transform weights to Winograd domain. */
- InputTransform _input_transform; /** Operator to transform input to Winograd domain. */
- const arm_gemm::GemmArgs gemm_args;
- arm_gemm::UniqueGemmCommon<TInGEMM, TOutGEMM> gemms; /** Operator to perform multiple GEMMs. */
- OutputTransform _output_transform; /** Operator to transform output from Winograd domain. */
-
- public:
-
- /** Determine how much memory (in units of TIn) to allocate for the
- * transformed weights.
- */
- static unsigned int get_weight_storage_size(
- const int n_output_channels, /** Number of output feature maps. */
- const int n_input_channels /** Number of input feature maps. */
- );
-
- static unsigned int get_weight_stride(
- const int n_output_channels, /** Number of output feature maps. */
- const int n_input_channels /** Number of input feature maps. */
- );
-
- static unsigned int get_weight_multi_stride(
- const int n_output_channels, /** Number of output feature maps. */
- const int n_input_channels /** Number of input feature maps. */
- );
-
- /** Determine how much memory (in units of TIn) to allocate for the
- * transformed input.
- */
- static unsigned int get_input_storage_size(
- const int n_batches, /** Number of batches in the input tensor. */
- const int n_channels, /** Number of feature maps in the input tensor. */
- const int n_rows, /** Number of rows in each feature map. */
- const int n_cols, /** Number of columns in each feature map. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- /** Get the row stride for the A matrix in the Winograd domain. */
- static unsigned int get_input_stride(
- const int n_batches, /** Number of batches in the input tensor. */
- const int n_channels, /** Number of feature maps in the input tensor. */
- const int n_rows, /** Number of rows in each feature map. */
- const int n_cols, /** Number of columns in each feature map. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- /** Get the stride between A matrices in the Winograd domain. */
- static unsigned int get_input_multi_stride(
- const int n_batches, /** Number of batches in the input tensor. */
- const int n_channels, /** Number of feature maps in the input tensor. */
- const int n_rows, /** Number of rows in each feature map. */
- const int n_cols, /** Number of columns in each feature map. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- /** Determine how much memory (in units of TOut) to allocate for the
- * (Winograd domain) output.
- */
- static unsigned int get_output_storage_size(
- const int n_batches, /** Number of batches in the output tensor. */
- const int n_rows, /** Number of rows in each feature map of the input tensor. */
- const int n_cols, /** Number of columns in each feature map of the input tensor. */
- const int n_output_channels, /** Number of feature maps in the output tensor. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- static unsigned int get_output_stride(
- const int n_batches, /** Number of batches in the output tensor. */
- const int n_rows, /** Number of rows in each feature map of the input tensor. */
- const int n_cols, /** Number of columns in each feature map of the input tensor. */
- const int n_output_channels, /** Number of feature maps in the output tensor. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- static unsigned int get_output_multi_stride(
- const int n_batches, /** Number of batches in the output tensor. */
- const int n_rows, /** Number of rows in each feature map of the input tensor. */
- const int n_cols, /** Number of columns in each feature map of the input tensor. */
- const int n_output_channels, /** Number of feature maps in the output tensor. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- /** Get the shape (rows, cols) of a feature map of the output tensor. */
- static std::pair<int, int> get_output_feature_map_shape(
- const int n_input_rows, /** Number of rows in the input feature map. */
- const int n_input_cols, /** Number of columns in the input feature map. */
- const bool same_padding /** Use "SAME" padding, otherwise use "VALID". */
- );
-
- /** Create a new Winograd convolution layer.
- */
- WinogradConvolutionLayer(
- const CPUInfo &cpuinfo, /** Describes CPU properties. */
- const int n_threads, /** Maximum number of threads used to execute the convolution. */
- const int n_batches, /** Number of batches in the input and output tensors. */
- const int n_input_channels, /** Number of feature maps in a batch of the input tensor. */
- const int n_input_rows, /** Number of rows in a feature map of the input tensor. */
- const int n_input_cols, /** Number of columns in a feature map of the input tensor. */
- const int n_output_channels, /** Number of feature maps in the output tensor. */
- const bool same_padding, /** Use "SAME" padding, otherwise use "VALID". */
- const arm_gemm::Activation &activation,
- const TIn* const weights, /** Pointer to weight tensor in spatial domain. Must be ordered as "Height x Rows x Input Feature Maps x Output Feature Maps. */
- TInGEMM* const weights_storage, /** Pointer to storage for weight tensor in the Winograd domain. Must be at least the size returned by `get_weight_storage_size`. */
- const TIn* const input, /** Pointer to NHWC ordered input tensor, in the spatial domain. */
- TInGEMM* const winograd_input, /** Pointer to working space for the input tensor in the Winograd domain. Must be at least the size returned by `get_input_storage_size`. */
- const TOut* const biases, /** Pointer to biases vector. Pass nullptr if no bias is provided. */
- TOut* const output, /** Pointer to NHWC ordered output tensor, in the spatial domain. */
- TOutGEMM* const winograd_output, /** Pointer to working space for the output tensor in the Winograd domain. Must be at least the size returned by `get_output_storage_size`. */
- const bool pretranspose_B=true, /** Hint that the B matrix can be pretransposed. */
- arm_gemm::GemmConfig *gemm_cfg=nullptr /** Pointer to GEMM configuration. */
- );
-
- /* Utility methods for interacting with the layer. */
- unsigned int weight_transform_get_window(void) const;
- void weight_transform_run(const unsigned int start, const unsigned int stop);
-
- IInputTransform& input_transform(void);
- IOutputTransform& output_transform(void);
-
- /* Get a pointer to the GEMM underlying the Winograd transform. */
- arm_gemm::IGemmCommon *gemm(void);
-};
-
-}