luci_interpreter::kernels::Gather Class Reference

#include <Gather.h>

Collaboration diagram for luci_interpreter::kernels::Gather:

Public Member Functions
	Gather (const Tensor *params, const Tensor *indices, Tensor *output, const GatherParams &gparams)
const Tensor *	params () const
const Tensor *	indices () const
Tensor *	output () const
void	configure () override
void	execute () const override
Public Member Functions inherited from luci_interpreter::KernelWithParams< GatherParams >
const GatherParams &	params () const
Public Member Functions inherited from luci_interpreter::Kernel
virtual	~Kernel ()=default
const std::vector< const Tensor * > &	getInputTensors () const
const std::vector< Tensor * > &	getOutputTensors () const

Additional Inherited Members
Protected Member Functions inherited from luci_interpreter::KernelWithParams< GatherParams >
	KernelWithParams (std::vector< const Tensor * > inputs, std::vector< Tensor * > outputs, const GatherParams &params)
Protected Member Functions inherited from luci_interpreter::Kernel
	Kernel (std::vector< const Tensor * > inputs, std::vector< Tensor * > outputs)
Protected Attributes inherited from luci_interpreter::KernelWithParams< GatherParams >
const GatherParams	_params
Protected Attributes inherited from luci_interpreter::Kernel
const std::vector< const Tensor * >	_inputs
const std::vector< Tensor * >	_outputs

Detailed Description

Definition at line 28 of file Gather.h.

Constructor & Destructor Documentation

Gather()

luci_interpreter::kernels::Gather::Gather	(	const Tensor *	params,
		const Tensor *	indices,
		Tensor *	output,
		const GatherParams &	gparams
	)

Definition at line 31 of file Gather.cpp.

  : KernelWithParams<GatherParams>({params, indices}, {output}, gparams)
{
}

References indices(), and params().

Member Function Documentation

configure()

void luci_interpreter::kernels::Gather::configure ( )

overridevirtual

Implements luci_interpreter::Kernel.

Definition at line 37 of file Gather.cpp.

{
  if (params()->element_type() == DataType::FLOAT32)
  {
    LUCI_INTERPRETER_CHECK(output()->element_type() == DataType::FLOAT32);
  }
  else if (params()->element_type() == DataType::S32)
  {
    LUCI_INTERPRETER_CHECK(output()->element_type() == DataType::S32);
  }
  else
  {
    throw std::runtime_error("luci-intp Gather(1) Unsupported type.");
  }
 
  LUCI_INTERPRETER_CHECK(indices()->element_type() == DataType::S32 ||
                         indices()->element_type() == DataType::S64);
 
  // refer tensorflow/lite/kernels/gather.cc
 
  const Shape &params_shape = params()->shape();
  Shape indices_shape = indices()->shape();
  {
    // scalar index is treated as a tensor with the shape of [1]
    if (indices_shape.num_dims() == 0)
    {
      indices_shape = Shape({1});
    }
  }
 
  int axis = _params.axis;
  if (axis < 0)
  {
    axis += params_shape.num_dims();
  }
  LUCI_INTERPRETER_CHECK(0 <= axis && axis < params_shape.num_dims());
 
  int batch_dims = _params.batch_dims;
  // batch_dims should be in range: [-rank(indices), rank(indices)].
  // Negative batch_dims is added with rank of positions.
  if (batch_dims < 0)
  {
    batch_dims += indices_shape.num_dims();
  }
  LUCI_INTERPRETER_CHECK(batch_dims <= axis);
  LUCI_INTERPRETER_CHECK(0 <= batch_dims && batch_dims < params_shape.num_dims());
  LUCI_INTERPRETER_CHECK(batch_dims <= indices_shape.num_dims());
  for (int i = 0; i < batch_dims; ++i)
  {
    LUCI_INTERPRETER_CHECK(params_shape.dim(i) == indices_shape.dim(i));
  }
 
  const int num_dimensions = params_shape.num_dims() + indices_shape.num_dims() - 1 - batch_dims;
 
  Shape output_shape(num_dimensions);
  int output_index = 0;
  for (int i = 0; i < axis; ++i)
  {
    output_shape.dim(output_index++) = params_shape.dim(i);
  }
  for (int i = batch_dims; i < indices_shape.num_dims(); ++i)
  {
    output_shape.dim(output_index++) = indices_shape.dim(i);
  }
  for (int i = axis + 1; i < params_shape.num_dims(); ++i)
  {
    output_shape.dim(output_index++) = params_shape.dim(i);
  }
  output()->resize(output_shape);
}

References luci_interpreter::KernelWithParams< GatherParams >::_params, luci_interpreter::GatherParams::axis, luci_interpreter::GatherParams::batch_dims, luci_interpreter::Shape::dim(), indices(), LUCI_INTERPRETER_CHECK, luci_interpreter::Shape::num_dims(), output(), output_shape, params(), luci_interpreter::Tensor::resize(), and luci_interpreter::Tensor::shape().

execute()

void luci_interpreter::kernels::Gather::execute ( ) const

overridevirtual

Implements luci_interpreter::Kernel.

Definition at line 108 of file Gather.cpp.

{
  switch (params()->element_type())
  {
    case DataType::FLOAT32:
      eval<float>();
      break;
    case DataType::S32:
      eval<int32_t>();
      break;
    default:
      throw std::runtime_error("luci-intp Gather(2) Unsupported type.");
  }
}

References params().

indices()

const Tensor * luci_interpreter::kernels::Gather::indices ( ) const

inline

Definition at line 34 of file Gather.h.

{ return _inputs[1]; }

References luci_interpreter::Kernel::_inputs.

Referenced by configure(), and Gather().

output()

Tensor * luci_interpreter::kernels::Gather::output ( ) const

inline

Definition at line 35 of file Gather.h.

{ return _outputs[0]; }

References luci_interpreter::Kernel::_outputs.

Referenced by configure().

params()

const Tensor * luci_interpreter::kernels::Gather::params ( ) const

inline

Definition at line 33 of file Gather.h.

{ return _inputs[0]; }

References luci_interpreter::Kernel::_inputs.

Referenced by configure(), execute(), and Gather().

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The documentation for this class was generated from the following files:

• compiler/luci-interpreter/src/kernels/Gather.h
• compiler/luci-interpreter/src/kernels/Gather.cpp