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+/*
+ * Copyright (c) 2021-2023 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.hpp"
+#include "common.hpp"
+#include <cstddef>
+#include <tuple>
+
+namespace arm_conv
+{
+namespace depthwise
+{
+using arm_gemm::Nothing;
+
+enum class DepthwiseMethod
+{
+ DEFAULT,
+ DEPTHFIRST,
+ PLANAR,
+};
+
+struct KernelDescription
+{
+ DepthwiseMethod method = DepthwiseMethod::DEFAULT;
+ std::string name = "";
+ bool is_default = false;
+ uint64_t cycle_estimate = 0;
+
+ KernelDescription(DepthwiseMethod method, std::string name, bool is_default, uint64_t cycle_estimate)
+ : method(method), name(name), is_default(is_default), cycle_estimate(cycle_estimate)
+ {
+ }
+
+ KernelDescription() noexcept {};
+};
+
+class IDepthwiseCommon
+{
+public:
+ virtual ~IDepthwiseCommon() = default;
+
+ // Get the name of the depthwise implementation
+ virtual std::string name() const = 0;
+
+ // Determine the amount of storage space required for the rearranged weights
+ // and bias.
+ virtual size_t get_storage_size(void) const = 0;
+
+ // Rearrange the weights and biases into a storage buffer.
+ // Accepts a pointer to a buffer into which to store the packed parameters, a
+ // pointer the bias vector (which may be nullptr in the case of no bias) and
+ // a pointer to the array of weights (stored in HWIO order).
+ virtual void pack_parameters(
+ void *buffer, const void *biases, const void *weights, size_t ld_weight_col = 0, size_t ld_weight_row = 0) = 0;
+
+ // Determine the amount of working space required
+ virtual size_t get_working_size(unsigned int n_threads) const = 0;
+
+ // Execute the convolution over the specified area of memory.
+ virtual void execute(const void *input, // Pointer to input tensor
+ const void *parameters, // Packed parameters buffer
+ void *output,
+ void *working_space,
+ unsigned int thread_id,
+ unsigned int n_threads) const = 0;
+
+ virtual void execute(const void *input,
+ size_t ld_input_col,
+ size_t ld_input_row,
+ size_t ld_input_batch,
+ const void *parameters,
+ void *output,
+ size_t ld_output_col,
+ size_t ld_output_row,
+ size_t ld_output_batch,
+ void *working_space,
+ unsigned int thread_id,
+ unsigned int n_threads) const = 0;
+
+ virtual void execute(unsigned int batches,
+ unsigned int input_height,
+ unsigned int input_width,
+ unsigned int channels,
+ const PaddingValues &,
+ const void *input,
+ size_t ld_input_col,
+ size_t ld_input_row,
+ size_t ld_input_batch,
+ const void *parameters,
+ unsigned int output_height,
+ unsigned int output_width,
+ void *output,
+ size_t ld_output_col,
+ size_t ld_output_row,
+ size_t ld_output_batch,
+ void *working_space,
+ unsigned int thread_id,
+ unsigned int n_threads) const = 0;
+};
+
+// To handle a dilation factor of D execute the kernel once for each d in
+// [0..D). Each `d` corresponds to a portion or "view" of the input and output
+// tensors. The output view corresponds to every Dth pixel starting from `d`;
+// this function computes how many pixels are covered. The input view consists
+// of an amount of before padding, every Dth pixel starting from an offset, and
+// some after padding. This function computes the start padding, input offset,
+// number of valid input pixels, and the after padding.
+//
+// Returns
+// - Number of valid output pixels corresponding to `d`
+// - Number of valid input pixels corresponding to `d`
+// - Offset of the first pixel corresponding to `d`
+// - Amount of padding in the view for `d`
+std::tuple<size_t, size_t, size_t, size_t, size_t> get_reduced_view_for_dilation(size_t out_size,
+ size_t in_size,
+ size_t d,
+ size_t dilation_factor,
+ size_t kernel_size,
+ size_t stride,
+ size_t pad_before);
+
+} // namespace depthwise
+} // namespace arm_conv