/**
 *  Copyright (c) 2023 by Contributors
 * @file index_select.cc
 * @brief Index select operators.
 */
#include "./index_select.h"

#include "./macro.h"

namespace graphbolt {
namespace ops {

torch::Tensor IndexSelect(torch::Tensor input, torch::Tensor index) {
  if (input.is_pinned() &&
      (index.is_pinned() || index.device().type() == c10::DeviceType::CUDA)) {
    GRAPHBOLT_DISPATCH_CUDA_ONLY_DEVICE(
        c10::DeviceType::CUDA, "UVAIndexSelect",
        { return UVAIndexSelectImpl(input, index); });
  }
  return input.index({index.to(torch::kLong)});
}

}  // namespace ops
}  // namespace graphbolt