Reduction.h

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#pragma once

#include "Open3D/Core/SizeVector.h"
#include "Open3D/Core/Tensor.h"
#include "Open3D/Utility/Console.h"
#include "Open3D/Utility/Helper.h"

#include <unordered_set>

namespace open3d {
namespace kernel {

enum class ReductionOpCode { Sum, Prod, Min, Max, ArgMin, ArgMax };

static const std::unordered_set<ReductionOpCode, utility::hash_enum_class::hash>
        regular_reduce_ops = {ReductionOpCode::Sum, ReductionOpCode::Prod,
                              ReductionOpCode::Min, ReductionOpCode::Max};
static const std::unordered_set<ReductionOpCode, utility::hash_enum_class::hash>
        arg_reduce_ops = {ReductionOpCode::ArgMin, ReductionOpCode::ArgMax};

void Reduction(const Tensor& src,
               Tensor& dst,
               const SizeVector& dims,
               bool keepdim,
               ReductionOpCode op_code);

void ReductionCPU(const Tensor& src,
                  Tensor& dst,
                  const SizeVector& dims,
                  bool keepdim,
                  ReductionOpCode op_code);

#ifdef BUILD_CUDA_MODULE
void ReductionCUDA(const Tensor& src,
                   Tensor& dst,
                   const SizeVector& dims,
                   bool keepdim,
                   ReductionOpCode op_code);
#endif

}  // namespace kernel
}  // namespace open3d