text: //*****************************************************************************
  // Copyright 2017-2018 Intel Corporation
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  //*****************************************************************************
  
  #pragma once
  
  #include <cmath>
  
  #include "ngraph/coordinate_transform.hpp"
  
  namespace ngraph
  {
      namespace runtime
      {
          namespace reference
          {
              template <typename T, typename U>
              void argmax(
                  const T* arg, U* out, const Shape& in_shape, const Shape& out_shape, size_t axis)
              {
                  // take the first elements (i.e. 0 indices) in out_shape - axis as maximums
                  memset(out, 0, shape_size(out_shape) * sizeof(U));
  
                  AxisVector av{axis};
                  CoordinateTransform input_transform(in_shape);
  
                  for (const Coordinate& input_coord : input_transform)
                  {
                      Coordinate output_coord = reduce(input_coord, av);
                      CoordinateTransform output_transform(out_shape);
  
                      auto min_index = static_cast<size_t>(out[output_transform.index(output_coord)]);
                      auto min_coord = input_coord;
                      min_coord[axis] = min_index;
                      if (arg[input_transform.index(input_coord)] >
                          arg[input_transform.index(min_coord)])
                      {
                          out[output_transform.index(output_coord)] =
                              static_cast<U>(input_coord[axis]);
                      }
                  }
              }
          }
      }
  }
  