COMPMID-3638: Move NEON kernels

Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Change-Id: Ieed3e4bc8be7fef80c90c5094599b477a56fc473
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4285
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/core/NEON/kernels/NESobel3x3Kernel.h b/src/core/NEON/kernels/NESobel3x3Kernel.h
new file mode 100644
index 0000000000..2c3eaf5eb7
--- /dev/null
+++ b/src/core/NEON/kernels/NESobel3x3Kernel.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2016-2020 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_NESOBEL3x3KERNEL_H
+#define ARM_COMPUTE_NESOBEL3x3KERNEL_H
+
+#include "src/core/NEON/INEKernel.h"
+
+namespace arm_compute
+{
+class ITensor;
+
+/** Interface for the kernel to run a 3x3 Sobel X filter on a tensor.
+ *
+ * @f[
+ *      \mathbf{G}_x=\begin{vmatrix}
+ *      -1 & 0 & +1\\
+ *      -2 & 0 & +2\\
+ *      -1 & 0 & +1
+ *      \end{vmatrix}
+ * @f]
+*/
+class NESobel3x3Kernel : public INEKernel
+{
+public:
+    const char *name() const override
+    {
+        return "NESobel3x3Kernel";
+    }
+    /** Default constructor */
+    NESobel3x3Kernel();
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NESobel3x3Kernel(const NESobel3x3Kernel &) = delete;
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NESobel3x3Kernel &operator=(const NESobel3x3Kernel &) = delete;
+    /** Allow instances of this class to be moved */
+    NESobel3x3Kernel(NESobel3x3Kernel &&) = default;
+    /** Allow instances of this class to be moved */
+    NESobel3x3Kernel &operator=(NESobel3x3Kernel &&) = default;
+    /** Default destructor */
+    ~NESobel3x3Kernel() = default;
+
+    /** Initialise the kernel's source, destination and border mode.
+     *
+     * @note At least one of output_x or output_y must be set.
+     *
+     * @param[in]  input            Source tensor. Data type supported: U8.
+     * @param[out] output_x         (Optional) Destination tensor for the X gradient. Data type supported: S16.
+     * @param[out] output_y         (Optional) Destination tensor for the Y gradient. Data type supported: S16.
+     * @param[in]  border_undefined True if the border mode is undefined. False if it's replicate or constant.
+     */
+    void configure(const ITensor *input, ITensor *output_x, ITensor *output_y, bool border_undefined);
+
+    // Inherited methods overridden:
+    void run(const Window &window, const ThreadInfo &info) override;
+    BorderSize border_size() const override;
+
+private:
+    bool           _run_sobel_x; /**< Do we need to run Sobel X ? */
+    bool           _run_sobel_y; /**< Do we need to run Sobel Y ? */
+    const ITensor *_input;       /**< Input tensor */
+    ITensor       *_output_x;    /**< Output tensor for sobel X */
+    ITensor       *_output_y;    /**< Output tensor for sobel Y */
+};
+} // namespace arm_compute
+#endif /*ARM_COMPUTE_NESOBEL3x3KERNEL_H */