.. index:: pair: struct; dnnl::batch_normalization_backward::desc
.. _doxid-structdnnl_1_1batch__normalization__backward_1_1desc:

struct dnnl::batch_normalization_backward::desc
===============================================

.. toctree::
	:hidden:

Overview
~~~~~~~~

Descriptor for a batch normalization backward propagation primitive. :ref:`More...<details-structdnnl_1_1batch__normalization__backward_1_1desc>`


.. ref-code-block:: cpp
	:class: doxyrest-overview-code-block

	#include <dnnl.hpp>
	
	struct desc
	{
		// fields
	
		:ref:`dnnl_batch_normalization_desc_t<doxid-structdnnl__batch__normalization__desc__t>` :target:`data<doxid-structdnnl_1_1batch__normalization__backward_1_1desc_1a7d70fd1bb4b7a45dbe2277a64137b536>`;

		// construction
	
		:ref:`desc<doxid-structdnnl_1_1batch__normalization__backward_1_1desc_1a3074a8fda3a8a60bfe6ed3ccf425bb15>`(
			:ref:`prop_kind<doxid-group__dnnl__api__attributes_1gac7db48f6583aa9903e54c2a39d65438f>` aprop_kind,
			const :ref:`memory::desc<doxid-structdnnl_1_1memory_1_1desc>`& diff_data_desc,
			const :ref:`memory::desc<doxid-structdnnl_1_1memory_1_1desc>`& data_desc,
			float epsilon,
			:ref:`normalization_flags<doxid-group__dnnl__api__primitives__common_1gad8ef0fcbb7b10cae3d67dd46892002be>` flags
			);
	};
.. _details-structdnnl_1_1batch__normalization__backward_1_1desc:

Detailed Documentation
~~~~~~~~~~~~~~~~~~~~~~

Descriptor for a batch normalization backward propagation primitive.

Construction
------------

.. index:: pair: function; desc
.. _doxid-structdnnl_1_1batch__normalization__backward_1_1desc_1a3074a8fda3a8a60bfe6ed3ccf425bb15:

.. ref-code-block:: cpp
	:class: doxyrest-title-code-block

	desc(
		:ref:`prop_kind<doxid-group__dnnl__api__attributes_1gac7db48f6583aa9903e54c2a39d65438f>` aprop_kind,
		const :ref:`memory::desc<doxid-structdnnl_1_1memory_1_1desc>`& diff_data_desc,
		const :ref:`memory::desc<doxid-structdnnl_1_1memory_1_1desc>`& data_desc,
		float epsilon,
		:ref:`normalization_flags<doxid-group__dnnl__api__primitives__common_1gad8ef0fcbb7b10cae3d67dd46892002be>` flags
		)

Constructs a batch normalization descriptor for backward propagation.



.. rubric:: Parameters:

.. list-table::
	:widths: 20 80

	*
		- aprop_kind

		- Propagation kind. Possible values are :ref:`dnnl::prop_kind::backward_data <doxid-group__dnnl__api__attributes_1ggac7db48f6583aa9903e54c2a39d65438faa12627cacf73ecb7ef088beedd650e96>` and :ref:`dnnl::prop_kind::backward <doxid-group__dnnl__api__attributes_1ggac7db48f6583aa9903e54c2a39d65438fa195fe59b6f103787a914aead0f3db502>` (diffs for all parameters are computed in this case).

	*
		- diff_data_desc

		- Diff source and diff destination memory descriptor.

	*
		- data_desc

		- Source memory descriptor.

	*
		- epsilon

		- Batch normalization epsilon parameter.

	*
		- flags

		- Batch normalization flags (:ref:`dnnl::normalization_flags <doxid-group__dnnl__api__primitives__common_1gad8ef0fcbb7b10cae3d67dd46892002be>`).