text: // ----------------------------------------------------------------------------
  // -                        Open3D: www.open3d.org                            -
  // ----------------------------------------------------------------------------
  // The MIT License (MIT)
  //
  // Copyright (c) 2019 www.open3d.org
  //
  // 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.
  // ----------------------------------------------------------------------------
  
  #include "ReduceSubarraysSumOpKernel.h"
  #include "open3d/ml/impl/misc/ReduceSubarraysSum.h"
  
  using namespace open3d::ml::detail;
  using namespace reduce_subarrays_sum_opkernel;
  using namespace tensorflow;
  
  template <class T>
  class ReduceSubarraysSumOpKernelCPU : public ReduceSubarraysSumOpKernel {
  public:
      explicit ReduceSubarraysSumOpKernelCPU(OpKernelConstruction* construction)
          : ReduceSubarraysSumOpKernel(construction) {}
  
      void Kernel(OpKernelContext* context,
                  const tensorflow::Tensor& values,
                  const tensorflow::Tensor& row_splits,
                  tensorflow::Tensor& sums) {
          ReduceSubarraysSumCPU(
                  values.flat<T>().data(), values.shape().dim_size(0),
                  (int64_t*)row_splits.flat<int64>().data(),
                  row_splits.shape().dim_size(0) - 1, sums.flat<T>().data());
      }
  };
  
  #define REG_KB(type)                                            \
      REGISTER_KERNEL_BUILDER(Name("Open3DReduceSubarraysSum")    \
                                      .Device(DEVICE_CPU)         \
                                      .TypeConstraint<type>("T"), \
                              ReduceSubarraysSumOpKernelCPU<type>);
  REG_KB(int32_t)
  REG_KB(int64)
  REG_KB(float)
  REG_KB(double)
  #undef REG_KB
  