Integrate new winograd APIs from MLTech

Resolves: COMPMID-5400
Signed-off-by: Ramy Elgammal <ramy.elgammal@arm.com>
Change-Id: Ib4428436dd7a6e40d8b2d8a2f8dac1b079154551
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/7894
Reviewed-by: Pablo Marquez Tello <pablo.tello@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/assembly/winograd.hpp b/src/core/NEON/kernels/assembly/winograd.hpp
new file mode 100644
index 0000000..836402e
--- /dev/null
+++ b/src/core/NEON/kernels/assembly/winograd.hpp
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 2022 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 "src/cpu/kernels/assembly/arm_gemm.hpp"
+#include <cstddef>
+
+namespace arm_conv
+{
+struct Shape2D
+{
+    unsigned int rows, cols;
+};
+
+struct ConvolutionArgs
+{
+    unsigned int         n_batches;
+    Shape2D              input_shape;
+    unsigned int         n_input_channels;
+    unsigned int         pad_top, pad_left;
+    Shape2D              output_shape;
+    unsigned int         n_output_channels;
+    Shape2D              kernel_shape;
+    arm_gemm::Activation activation;
+
+    ConvolutionArgs(
+        unsigned int   n_batches,
+        const Shape2D &input_shape,
+        unsigned int   n_input_channels,
+        unsigned int pad_top, unsigned int pad_left,
+        const Shape2D              &output_shape,
+        unsigned int                n_output_channels,
+        const Shape2D               kernel_shape,
+        const arm_gemm::Activation &activation = {})
+        : n_batches(n_batches), input_shape(input_shape), n_input_channels(n_input_channels), pad_top(pad_top), pad_left(pad_left), output_shape(output_shape), n_output_channels(n_output_channels),
+          kernel_shape(kernel_shape), activation(activation)
+    {
+    }
+};
+
+namespace winograd
+{
+/* Constrain the selected Winograd implementation.
+ */
+struct WinogradConfig
+{
+    unsigned int output_rows = 0, output_cols = 0;
+    std::string  input_transform_filter  = "";
+    std::string  output_transform_filter = "";
+    std::string  weight_transform_filter = "";
+};
+
+/* Struct describing (suggested) memory layout within the Winograd domain.
+ */
+struct WinogradDomainSpec
+{
+    size_t weight_matrix_size_bytes, input_matrix_size_bytes, output_matrix_size_bytes;
+
+    size_t weight_ld_matrix, weight_ld_row;
+    size_t input_ld_batch, input_ld_matrix, input_ld_row;
+    size_t output_ld_batch, output_ld_matrix, output_ld_row;
+};
+
+class ITransformCommon
+{
+public:
+    virtual ~ITransformCommon() = default;
+
+    // Get the name of the transform
+    virtual const std::string &get_name(void) const = 0;
+};
+
+namespace weight_transform
+{
+class ITransform : public ITransformCommon
+{
+public:
+    ~ITransform() = default;
+
+    virtual unsigned int get_kernel_rows(void) const = 0;
+    virtual unsigned int get_kernel_cols(void) const = 0;
+
+    virtual unsigned int get_transformed_tile_rows(void) const = 0;
+    virtual unsigned int get_transformed_tile_cols(void) const = 0;
+
+    void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, size_t ld_in_row, size_t ld_in_col, size_t ld_input_channel,
+        void *outptr, const WinogradDomainSpec &wds,
+        unsigned int thread_id, unsigned int n_threads) const
+    {
+        this->execute(
+            args, inptr, ld_in_row, ld_in_col, ld_input_channel,
+            outptr, wds.weight_ld_matrix, wds.weight_ld_row,
+            thread_id, n_threads);
+    }
+
+    virtual void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, size_t ld_in_row, size_t ld_in_col, size_t ld_input_channel,
+        void *outptr, size_t ld_out_matrix, size_t ld_out_row,
+        unsigned int thread_id, unsigned int n_threads) const = 0;
+};
+
+} // namespace weight_transform
+
+namespace input_transform
+{
+class ITransform : public ITransformCommon
+{
+public:
+    ~ITransform() = default;
+
+    virtual unsigned int get_input_rows(void) const = 0;
+    virtual unsigned int get_input_cols(void) const = 0;
+
+    virtual size_t get_working_space_size(
+        const ConvolutionArgs &args,
+        unsigned int           n_threads) const = 0;
+
+    void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, size_t ld_in_batch, size_t ld_in_row, size_t ld_in_col,
+        void *outptr, const WinogradDomainSpec &wds,
+        void *working_space, unsigned int thread_id, unsigned int n_threads) const
+    {
+        this->execute(
+            args, inptr, ld_in_batch, ld_in_row, ld_in_col,
+            outptr, wds.input_ld_batch, wds.input_ld_matrix, wds.input_ld_row,
+            working_space, thread_id, n_threads);
+    }
+
+    virtual void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, size_t ld_in_batch, size_t ld_in_row, size_t ld_in_col,
+        void *outptr, size_t ld_out_batch, size_t ld_out_matrix, size_t ld_out_row,
+        void *working_space, unsigned int thread_id, unsigned int n_threads) const = 0;
+};
+
+} // namespace input_transform
+
+namespace output_transform
+{
+class ITransform : public ITransformCommon
+{
+public:
+    ~ITransform() = default;
+
+    virtual unsigned int get_input_rows(void) const = 0;
+    virtual unsigned int get_input_cols(void) const = 0;
+
+    virtual unsigned int get_output_rows(void) const = 0;
+    virtual unsigned int get_output_cols(void) const = 0;
+
+    virtual unsigned int get_kernel_rows(void) const = 0;
+    virtual unsigned int get_kernel_cols(void) const = 0;
+
+    virtual size_t get_working_space_size(
+        const ConvolutionArgs &args,
+        unsigned int           n_threads) const = 0;
+
+    void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, const WinogradDomainSpec &wds,
+        const void *bias,
+        void *outptr, size_t ld_out_batch, size_t ld_out_row, size_t ld_out_col,
+        void *working_space, unsigned int thread_id, unsigned int n_threads) const
+    {
+        this->execute(
+            args,
+            inptr, wds.output_ld_batch, wds.output_ld_matrix, wds.output_ld_row,
+            bias,
+            outptr, ld_out_batch, ld_out_row, ld_out_col,
+            working_space, thread_id, n_threads);
+    }
+
+    virtual void execute(
+        const ConvolutionArgs &args,
+        const void *inptr, size_t ld_in_batch, size_t ld_in_matrix, size_t ld_in_row,
+        const void *bias,
+        void *outptr, size_t ld_out_batch, size_t ld_out_row, size_t ld_out_col,
+        void *working_space, unsigned int thread_id, unsigned int n_threads) const = 0;
+};
+
+} // namespace output_transform
+
+struct WinogradImpl
+{
+    const output_transform::ITransform *output_transform = nullptr;
+    const weight_transform::ITransform *weight_transform = nullptr;
+    const input_transform::ITransform *input_transform  = nullptr;
+    std::unique_ptr<arm_gemm::GemmArgs> gemm_args;
+    WinogradDomainSpec                  winograd_spec;
+};
+
+/* Get pointers to Winograd transforms for the given convolution problem.
+ *
+ * Assigns to the pointers in the `dest` struct and returns true or false to
+ * indicate whether the given problem can be executed or not.
+ */
+template <typename TIn, typename TWeight = TIn, typename TOut = TIn, typename TWinogradIn = TIn, typename TWinogradOut = TOut>
+bool get_implementation(
+    WinogradImpl &dest, // Destination for the selected implementation
+    const CPUInfo *,
+    const ConvolutionArgs &,
+    int  max_threads,
+    bool fast_mode,
+    const WinogradConfig *,
+    const arm_gemm::GemmConfig *);
+
+} // namespace winograd
+} // namespace arm_conv