struct dnnl::eltwise_backward::primitive

Intel® oneAPI Deep Neural Network Developer Guide and Reference

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ID 768875

Date 2/28/2024

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struct dnnl::eltwise_backward::primitive_desc

Overview

Primitive descriptor for eltwise backward propagation. More…


#include <dnnl.hpp>

struct primitive_desc: public dnnl::primitive_desc
{
    // construction

    primitive_desc();

    primitive_desc(
        const engine& aengine,
        algorithm aalgorithm,
        const memory::desc& diff_src_desc,
        const memory::desc& diff_dst_desc,
        const memory::desc& data_desc,
        const eltwise_forward::primitive_desc& hint_fwd_pd,
        const primitive_attr& attr = default_attr(),
        bool allow_empty = false
        );

    primitive_desc(
        const engine& aengine,
        algorithm aalgorithm,
        const memory::desc& diff_src_desc,
        const memory::desc& diff_dst_desc,
        const memory::desc& data_desc,
        float alpha,
        const eltwise_forward::primitive_desc& hint_fwd_pd,
        const primitive_attr& attr = default_attr(),
        bool allow_empty = false
        );

    primitive_desc(
        const engine& aengine,
        algorithm aalgorithm,
        const memory::desc& diff_src_desc,
        const memory::desc& diff_dst_desc,
        const memory::desc& data_desc,
        float alpha,
        float beta,
        const eltwise_forward::primitive_desc& hint_fwd_pd,
        const primitive_attr& attr = default_attr(),
        bool allow_empty = false
        );

    primitive_desc(dnnl_primitive_desc_t pd);

    // methods

    memory::desc src_desc() const;
    memory::desc diff_src_desc() const;
    memory::desc diff_dst_desc() const;
    dnnl::algorithm get_algorithm() const;
    dnnl::prop_kind get_prop_kind() const;
    float get_alpha() const;
    float get_beta() const;
};

Inherited Members


public:
    // methods

    handle<T, traits>& operator = (const handle<T, traits>&);
    handle<T, traits>& operator = (handle<T, traits>&&);
    void reset(T t, bool weak = false);
    T get(bool allow_empty = false) const;
    operator T () const;
    operator bool () const;
    bool operator == (const handle<T, traits>& other) const;
    bool operator != (const handle& other) const;
    engine get_engine() const;
    const char* impl_info_str() const;
    memory::dim query_s64(query what) const;
    memory::dims get_strides() const;
    memory::dims get_dilations() const;
    memory::dims get_padding_l() const;
    memory::dims get_padding_r() const;
    float get_epsilon() const;

    template <typename T = unsigned>
    T get_flags() const;

    dnnl::algorithm get_algorithm() const;
    float get_alpha() const;
    float get_beta() const;
    int get_axis() const;
    memory::dim get_local_size() const;
    float get_k() const;
    float get_p() const;
    std::vector<float> get_factors() const;
    dnnl::algorithm get_cell_kind() const;
    dnnl::rnn_direction get_direction() const;
    dnnl::algorithm get_activation_kind() const;
    memory::dims get_kernel() const;
    memory::dim get_group_size() const;
    dnnl::prop_kind get_prop_kind() const;
    memory::desc query_md(query what, int idx = 0) const;
    memory::desc src_desc(int idx) const;
    memory::desc dst_desc(int idx) const;
    memory::desc weights_desc(int idx) const;
    memory::desc diff_src_desc(int idx) const;
    memory::desc diff_dst_desc(int idx) const;
    memory::desc diff_weights_desc(int idx) const;
    memory::desc src_desc() const;
    memory::desc dst_desc() const;
    memory::desc weights_desc() const;
    memory::desc diff_src_desc() const;
    memory::desc diff_dst_desc() const;
    memory::desc diff_weights_desc() const;
    memory::desc workspace_desc() const;
    memory::desc scratchpad_desc() const;
    engine scratchpad_engine() const;
    primitive_attr get_primitive_attr() const;
    dnnl::primitive::kind get_kind() const;
    std::vector<uint8_t> get_cache_blob_id() const;
    bool next_impl();
    primitive_desc_base();
    primitive_desc_base();
    primitive_desc_base();
    primitive_desc_base();

Detailed Documentation

Primitive descriptor for eltwise backward propagation.

Construction


primitive_desc()

Default constructor. Produces an empty object.


primitive_desc(
    const engine& aengine,
    algorithm aalgorithm,
    const memory::desc& diff_src_desc,
    const memory::desc& diff_dst_desc,
    const memory::desc& data_desc,
    const eltwise_forward::primitive_desc& hint_fwd_pd,
    const primitive_attr& attr = default_attr(),
    bool allow_empty = false
    )

Constructs a primitive descriptor for an elementwise backward propagation primitive with an alpha parameter.

Parameters:

aengine	Engine to use.
aalgorithm	Elementwise algorithm kind.
diff_src_desc	Diff source memory descriptor.
diff_dst_desc	Diff destination memory descriptor.
data_desc	Destination memory descriptor if one of the “use_dst_for_bwd” algorithms are used (such as dnnl_eltwise_relu_use_dst_for_bwd), source memory descriptor otherwise.
hint_fwd_pd	Primitive descriptor for an elementwise forward propagation primitive. It is used as a hint for deciding which memory format to use.
attr	Primitive attributes to use. Attributes are optional and default to empty attributes.
allow_empty	A flag signifying whether construction is allowed to fail without throwing an exception. In this case an empty object will be produced. This flag is optional and defaults to false.


primitive_desc(
    const engine& aengine,
    algorithm aalgorithm,
    const memory::desc& diff_src_desc,
    const memory::desc& diff_dst_desc,
    const memory::desc& data_desc,
    float alpha,
    const eltwise_forward::primitive_desc& hint_fwd_pd,
    const primitive_attr& attr = default_attr(),
    bool allow_empty = false
    )

Constructs a primitive descriptor for an elementwise backward propagation primitive with an alpha parameter.

Parameters:

aengine	Engine to use.
aalgorithm	Elementwise algorithm kind.
diff_src_desc	Diff source memory descriptor.
diff_dst_desc	Diff destination memory descriptor.
data_desc	Destination memory descriptor if one of the “use_dst_for_bwd” algorithms are used (such as dnnl_eltwise_relu_use_dst_for_bwd), source memory descriptor otherwise.
alpha	The alpha parameter for the elementwise operation. Specific meaning depends on the algorithm.
hint_fwd_pd	Primitive descriptor for an elementwise forward propagation primitive. It is used as a hint for deciding which memory format to use.
attr	Primitive attributes to use. Attributes are optional and default to empty attributes.
allow_empty	A flag signifying whether construction is allowed to fail without throwing an exception. In this case an empty object will be produced. This flag is optional and defaults to false.


primitive_desc(
    const engine& aengine,
    algorithm aalgorithm,
    const memory::desc& diff_src_desc,
    const memory::desc& diff_dst_desc,
    const memory::desc& data_desc,
    float alpha,
    float beta,
    const eltwise_forward::primitive_desc& hint_fwd_pd,
    const primitive_attr& attr = default_attr(),
    bool allow_empty = false
    )

Constructs a primitive descriptor for an elementwise backward propagation primitive with an alpha and beta parameters.

Parameters:

aengine	Engine to use.
aalgorithm	Elementwise algorithm kind.
diff_src_desc	Diff source memory descriptor.
diff_dst_desc	Diff destination memory descriptor.
data_desc	Destination memory descriptor if one of the “use_dst_for_bwd” algorithms are used (such as dnnl_eltwise_relu_use_dst_for_bwd), source memory descriptor otherwise.
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.
hint_fwd_pd	Primitive descriptor for an elementwise forward propagation primitive. It is used as a hint for deciding which memory format to use.
attr	Primitive attributes to use. Attributes are optional and default to empty attributes.
allow_empty	A flag signifying whether construction is allowed to fail without throwing an exception. In this case an empty object will be produced. This flag is optional and defaults to false.


primitive_desc(dnnl_primitive_desc_t pd)

Constructs a primitive descriptor for an eltwise backward propagation primitive from a C API primitive descriptor that must have a matching kind.

Parameters:

pd	C API primitive descriptor for an eltwise backward propagation primitive.

Methods


memory::desc src_desc() const

Returns a source memory descriptor.

Returns:

Source memory descriptor.

A zero memory descriptor if the primitive does not have a source parameter.


memory::desc diff_src_desc() const

Returns a diff source memory descriptor.

Returns:

Diff source memory descriptor.

A zero memory descriptor if the primitive does not have a diff source memory with.


memory::desc diff_dst_desc() const

Returns a diff destination memory descriptor.

Returns:

Diff destination memory descriptor.

A zero memory descriptor if the primitive does not have a diff destination parameter.


dnnl::algorithm get_algorithm() const

Returns an algorithm kind.

Returns:

An algorithm kind.

dnnl::algorithm::undef if the primitive does not have an algorithm parameter.


dnnl::prop_kind get_prop_kind() const

Returns a propagation kind.

Returns:

A propagation kind.

dnnl::prop_kind::undef if the primitive does not have a propagation parameter.


float get_alpha() const

Returns an alpha.

Returns:

An alpha.

Zero if the primitive does not have an alpha parameter.


float get_beta() const

Returns a beta.

Returns:

A beta.

Zero if the primitive does not have a beta parameter.

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Intel® oneAPI Deep Neural Network Developer Guide and Reference

struct dnnl::eltwise_backward::primitive_desc

Overview

Detailed Documentation