COMPMID-3776: Indirect GEMM

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I51a1b0f098bc3a8c408c50c92221e4df3061e12c
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4343
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEGEMMConv2d.h b/arm_compute/runtime/NEON/functions/NEGEMMConv2d.h
new file mode 100644
index 0000000..7cae393
--- /dev/null
+++ b/arm_compute/runtime/NEON/functions/NEGEMMConv2d.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+#ifndef ARM_COMPUTE_NEGEMMCONV2D_H
+#define ARM_COMPUTE_NEGEMMCONV2D_H
+
+#include "arm_compute/runtime/FunctionDescriptors.h"
+#include "arm_compute/runtime/IFunction.h"
+#include "arm_compute/runtime/IMemoryManager.h"
+#include "arm_compute/runtime/NEON/functions/NEActivationLayer.h"
+#include "arm_compute/runtime/NEON/functions/NEGEMMAssemblyDispatch.h"
+#include "arm_compute/runtime/NEON/functions/NEPermute.h"
+#include "arm_compute/runtime/Tensor.h"
+
+#include <memory>
+namespace arm_compute
+{
+// Forward declarations
+class ITensor;
+/** Basic function to compute the convolution layer. This function calls the following NEON kernels/functions:
+ *
+ * Supports only NHWC data layout
+ *
+ * -# @ref NEGEMMAssemblyDispatch
+ * -# @ref NEActivationLayer, in case activation cannot be fused in the assembly dispatch
+ *
+ * Weights are transformed from OHWI to HWIO format using the following kernels:
+ * -# @ref NEPermute
+ */
+class NEGEMMConv2d : public IFunction
+{
+public:
+    /** Constructor */
+    NEGEMMConv2d(const std::shared_ptr<IMemoryManager> &memory_manager = nullptr);
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NEGEMMConv2d(const NEGEMMConv2d &) = delete;
+    /** Default move constructor */
+    NEGEMMConv2d(NEGEMMConv2d &&) = default;
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NEGEMMConv2d &operator=(const NEGEMMConv2d &) = delete;
+    /** Default move assignment operator */
+    NEGEMMConv2d &operator=(NEGEMMConv2d &&) = default;
+    /** Set the input and output tensors.
+     *
+     * @param[in]  input   Source tensor. 3 lower dimensions represent a single input [width, height, IFM],
+     *                     while every optional dimension from 4 and above represent a batch of inputs.
+     *                     Data types supported: QASYMM8/QASYMM8_SIGNED/BFLOAT16/F16/F32.
+     * @param[in]  weights Weights tensor. Weights are 4D tensor with dimensions [kernel_x, kernel_y, IFM, OFM].
+     *                     Data type supported: QASYMM8/QASYMM8_SIGNED/QSYMM8_PER_CHANNEL/BFLOAT16/F16/F32.
+     * @param[in]  biases  Biases tensor. Shared biases supported. Biases are 1D tensor with dimensions [OFM].
+     *                     Data type supported: Should match @p input data type, except for input of QASYMM8/QASYMM8_SIGNED type where biases should be of S32 type.
+     * @param[out] output  Destination tensor. 3 lower dimensions represent a single output [width, height, OFM], while the rest represent batch of outputs.
+     *                     Data types supported: Same as @p input.
+     * @param[in]  info    Convolution layer descriptor
+     */
+    void configure(ITensor *input, const ITensor *weights, const ITensor *biases, ITensor *output, const Conv2dInfo &info);
+    /** Static function to check if given info will lead to a valid configuration of @ref NEGEMMConv2d
+     *
+     * @param[in] input   Source tensor info. 3 lower dimensions represent a single input [width, height, IFM],
+     *                    while every optional dimension from 4 and above represent a batch of inputs.
+     *                    Data types supported: QASYMM8/QASYMM8_SIGNED/BFLOAT16/F16/F32.
+     * @param[in] weights Weights tensor info. Weights are 4D tensor with dimensions [kernel_x, kernel_y, IFM, OFM].
+     *                    Data type supported: QASYMM8/QASYMM8_SIGNED/QSYMM8_PER_CHANNEL/BFLOAT16/F16/F32.
+     * @param[in] biases  Biases tensor info. Shared biases supported. Biases are 1D tensor with dimensions [OFM].
+     *                    Data type supported: Should match @p input data type, except for input of QASYMM8/QASYMM8_SIGNED type where biases should be of S32 type.
+     * @param[in] output  Destination tensor info. 3 lower dimensions represent a single output [width, height, OFM], while the rest represent batch of outputs.
+     *                    Data types supported: Same as @p input.
+     * @param[in] info    Contains padding and stride information described in @ref PadStrideInfo.
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *input, const ITensorInfo *weights, const ITensorInfo *biases, const ITensorInfo *output, const Conv2dInfo &info);
+
+    // Inherited methods overridden:
+    void run() override;
+    void prepare() override;
+
+private:
+    NEGEMMAssemblyDispatch _gemm_asm_func;
+    NEActivationLayer      _activation_func;
+    NEPermute              _weights_permute_func;
+    const ITensor         *_original_weights;
+    Tensor                 _permuted_weights;
+    bool                   _is_prepared;
+    bool                   _run_activation;
+};
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_NEGEMMCONV2D_H */