COMPMID-1764 NEON: Implement ArgMax/ArgMin

Change-Id: Ibe23aa90b36ffd8553d1d1c35fada5d300fab829
Reviewed-on: https://review.mlplatform.org/475
Reviewed-by: Isabella Gottardi <isabella.gottardi@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/arm_compute/runtime/NEON/functions/NEArgMinMaxLayer.h b/arm_compute/runtime/NEON/functions/NEArgMinMaxLayer.h
new file mode 100644
index 0000000000..87d77a5e13
--- /dev/null
+++ b/arm_compute/runtime/NEON/functions/NEArgMinMaxLayer.h
@@ -0,0 +1,78 @@
+/*
+ * 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_NEARGMINMAXLAYER_H__
+#define __ARM_COMPUTE_NEARGMINMAXLAYER_H__
+
+#include "arm_compute/core/NEON/kernels/NEFillBorderKernel.h"
+#include "arm_compute/core/NEON/kernels/NEReductionOperationKernel.h"
+#include "arm_compute/core/Types.h"
+#include "arm_compute/runtime/MemoryGroup.h"
+#include "arm_compute/runtime/NEON/INESimpleFunction.h"
+
+namespace arm_compute
+{
+class IsTensor;
+
+/** Function to calculate the index of the minimum or maximum values in a tensor based on an axis.
+ *  This function calls the following NEON kernels:
+ *
+ * -# @ref NEReductionOperationKernel
+ * -# @ref NEFillBorderKernel
+ *
+ */
+class NEArgMinMaxLayer : public IFunction
+{
+public:
+    /** Constructor */
+    NEArgMinMaxLayer(std::shared_ptr<IMemoryManager> memory_manager = nullptr);
+    /** Set the input and output tensors.
+     *
+     * @param[in]  input  Input source tensor. Data types supported: F16/F32.
+     * @param[in]  axis   Axis to find max/min index.
+     * @param[out] output Output source tensor. Data types supported: U32.
+     * @param[in]  op     Operation to perform: min or max
+     */
+    void configure(ITensor *input, int axis, ITensor *output, const ReductionOperation &op);
+    /** Static function to check if given info will lead to a valid configuration of @ref NEArgMinMaxLayer
+     *
+     * @param[in] input  Input source tensor info. Data types supported: F16/F32.
+     * @param[in] axis   Axis to find max/min index.
+     * @param[in] output Output source tensor info. Data types supported: U32.
+     * @param[in] op     Operation to perform: min or max
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *input, int axis, const ITensorInfo *output, const ReductionOperation &op);
+
+    // Inherited methods overridden:
+    void run() override;
+
+private:
+    MemoryGroup                _memory_group;
+    NEReductionOperationKernel _reduction_kernel;
+    NEFillBorderKernel         _fill_border_kernel;
+    bool                       _run_fill_border;
+};
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_NEARGMINMAXLAYER_H__ */