.. index:: pair: struct; dnnl::eltwise_backward::desc
.. _doxid-structdnnl_1_1eltwise__backward_1_1desc:

struct dnnl::eltwise_backward::desc
===================================

.. toctree::
	:hidden:

Overview
~~~~~~~~

Descriptor for an elementwise backward propagation primitive. :ref:`More...<details-structdnnl_1_1eltwise__backward_1_1desc>`


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

	#include <dnnl.hpp>
	
	struct desc
	{
		// fields
	
		:ref:`dnnl_eltwise_desc_t<doxid-structdnnl__eltwise__desc__t>` :target:`data<doxid-structdnnl_1_1eltwise__backward_1_1desc_1abadecbc220bc157796dad92492983a8a>`;

		// construction
	
		:ref:`desc<doxid-structdnnl_1_1eltwise__backward_1_1desc_1a1f2b7f03992121019de203d01a9fe664>`(
			:ref:`algorithm<doxid-group__dnnl__api__attributes_1ga00377dd4982333e42e8ae1d09a309640>` aalgorithm,
			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 alpha = 0,
			float beta = 0
			);
	};
.. _details-structdnnl_1_1eltwise__backward_1_1desc:

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

Descriptor for an elementwise backward propagation primitive.

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

.. index:: pair: function; desc
.. _doxid-structdnnl_1_1eltwise__backward_1_1desc_1a1f2b7f03992121019de203d01a9fe664:

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

	desc(
		:ref:`algorithm<doxid-group__dnnl__api__attributes_1ga00377dd4982333e42e8ae1d09a309640>` aalgorithm,
		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 alpha = 0,
		float beta = 0
		)

Constructs a descriptor for an elementwise backward propagation primitive.



.. rubric:: Parameters:

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

	*
		- aalgorithm

		- Elementwise algorithm kind.

	*
		- diff_data_desc

		- Diff source and destination memory descriptors.

	*
		- data_desc

		- Source memory descriptor.

	*
		- alpha

		- The alpha parameter for the elementwise operation. Specific meaning depends on the algorithm.

	*
		- beta

		- The beta parameter for the elementwise operation. Specific meaning depends on the algorithm.