COMPMID-1761: NEON: Implement Pack
Change-Id: Icc3392494b1e3361e8fd925da200827c494351b3
Reviewed-on: https://review.mlplatform.org/430
Reviewed-by: Manuel Bottini <manuel.bottini@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEStackLayerKernel.h b/arm_compute/core/NEON/kernels/NEStackLayerKernel.h
new file mode 100644
index 0000000..3a9e81f
--- /dev/null
+++ b/arm_compute/core/NEON/kernels/NEStackLayerKernel.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2018-2019 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.
+ */
+
+#ifndef __ARM_COMPUTE_NESTACKLAYERKERNEL_H__
+#define __ARM_COMPUTE_NESTACKLAYERKERNEL_H__
+
+#include "arm_compute/core/NEON/INEKernel.h"
+#include "arm_compute/core/Types.h"
+
+namespace arm_compute
+{
+class ITensor;
+
+/** NEON kernel to stacks a rank-R tensor into one with rank-(R+1) along the axis dimension.*/
+class NEStackLayerKernel : public INEKernel
+{
+public:
+ const char *name() const override
+ {
+ return "NEStackLayerKernel";
+ }
+ /** Default constructor */
+ NEStackLayerKernel();
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEStackLayerKernel(const NEStackLayerKernel &) = delete;
+ /** Prevent instances of this class from being copied (As this class contains pointers) */
+ NEStackLayerKernel &operator=(const NEStackLayerKernel &) = delete;
+ /** Allow instances of this class to be moved */
+ NEStackLayerKernel(NEStackLayerKernel &&) = default;
+ /** Allow instances of this class to be moved */
+ NEStackLayerKernel &operator=(NEStackLayerKernel &&) = default;
+ /** Default destructor */
+ ~NEStackLayerKernel() = default;
+ /** Initialise the kernel's inputs and output
+ *
+ * @note Supported input tensor rank: up to 4
+ *
+ * @param[in] input Input tensor. Data types supported: U8/S8/QASYMM8/U16/S16/F16/U32/S32/F32
+ * @param[in] axis The dimension to stack the tensors along. It must be smaller than the number of input dimensions.
+ * @param[in] idx_input Index of the input tensor in the list of tensors to stack.
+ * All tensors in the list must have the same shape
+ * @param[in] num_tensors Number of tensors to stack
+ * @param[out] output Output tensor. Data types supported: Same as @p input.
+ *
+ */
+ void configure(const ITensor *input, unsigned int axis, unsigned int idx_input, unsigned int num_tensors, ITensor *output);
+ /** Static function to check if given info will lead to a valid configuration of @ref NEStackLayerKernel
+ *
+ * @note Supported input tensor rank: up to 4
+ *
+ * @param[in] input Input tensor info. Data types supported: U8/S8/QASYMM8/U16/S16/F16/U32/S32/F32
+ * @param[in] axis The dimension to stack the tensors along. It must be smaller than the number of input dimensions.
+ * @param[in] idx_input Index of the input tensor in the list of tensors to stack
+ * All tensors in the list must have the same shape
+ * @param[in] num_tensors Number of tensors to stack
+ * @param[in] output Output tensor info. Data types supported: Same as @p input.
+ *
+ * @return a status
+ */
+ static Status validate(const ITensorInfo *input, unsigned int axis, unsigned int idx_input, unsigned int num_tensors, const ITensorInfo *output);
+
+ // Inherited methods overridden
+ void run(const Window &window, const ThreadInfo &info) override;
+
+private:
+ /** Template function to run the stack
+ *
+ * @param[in] window Region on which to execute the kernel. (Must be a valid region of the window returned by window()).
+ */
+ template <typename T>
+ void run_stack(const Window &window);
+
+ /** Common signature for all the specialised stack functions
+ *
+ * @param[in] window Region on which to execute the kernel.
+ */
+ using StackFunctionPtr = void (NEStackLayerKernel::*)(const Window &window);
+
+ const ITensor *_input;
+ ITensor *_output;
+ unsigned int _axis;
+ unsigned int _idx_input;
+ StackFunctionPtr _func;
+};
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_NESTACKLAYERKERNEL_H__ */