PReLU

Intel® oneAPI Deep Neural Network Developer Guide and Reference

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ID 768875

Date 6/30/2025

Version

Public

PReLU

Overview

PReLU primitive A primitive to perform PReLU (leaky ReLU with trainable alpha parameter) More…

// structs

struct dnnl::prelu_backward;
struct dnnl::prelu_forward;

// global functions

dnnl_status_t DNNL_API dnnl_prelu_forward_primitive_desc_create(
    dnnl_primitive_desc_t* primitive_desc,
    dnnl_engine_t engine,
    dnnl_prop_kind_t prop_kind,
    const_dnnl_memory_desc_t src_desc,
    const_dnnl_memory_desc_t weights_desc,
    const_dnnl_memory_desc_t dst_desc,
    const_dnnl_primitive_attr_t attr
    );

dnnl_status_t DNNL_API dnnl_prelu_backward_primitive_desc_create(
    dnnl_primitive_desc_t* primitive_desc,
    dnnl_engine_t engine,
    const_dnnl_memory_desc_t src_desc,
    const_dnnl_memory_desc_t weights_desc,
    const_dnnl_memory_desc_t diff_src_desc,
    const_dnnl_memory_desc_t diff_weights_desc,
    const_dnnl_memory_desc_t diff_dst_desc,
    const_dnnl_primitive_desc_t hint_fwd_pd,
    const_dnnl_primitive_attr_t attr
    );

Detailed Documentation

PReLU primitive A primitive to perform PReLU (leaky ReLU with trainable alpha parameter)

See also:

PReLU in developer guide

Global Functions

dnnl_status_t DNNL_API dnnl_prelu_forward_primitive_desc_create(
    dnnl_primitive_desc_t* primitive_desc,
    dnnl_engine_t engine,
    dnnl_prop_kind_t prop_kind,
    const_dnnl_memory_desc_t src_desc,
    const_dnnl_memory_desc_t weights_desc,
    const_dnnl_memory_desc_t dst_desc,
    const_dnnl_primitive_attr_t attr
    )

Creates a primitive descriptor for a PReLU (leaky ReLU with trainable alpha parameter) forward propagation primitive.

NOTE:

weights descriptor is allowed to be initialized with dnnl_format_tag_any or with format_kind set to dnnl_format_kind_any.

Parameters:

primitive_desc	Output primitive descriptor.
engine	Engine to use.
prop_kind	Propagation kind. Possible values are dnnl_forward_training and dnnl_forward_inference.
src_desc	Source memory descriptor.
weights_desc	Alpha parameters memory descriptor.
dst_desc	Destination memory descriptor.
attr	Primitive attributes (can be NULL).

Returns:

dnnl_success on success and a status describing the error otherwise.

dnnl_status_t DNNL_API dnnl_prelu_backward_primitive_desc_create(
    dnnl_primitive_desc_t* primitive_desc,
    dnnl_engine_t engine,
    const_dnnl_memory_desc_t src_desc,
    const_dnnl_memory_desc_t weights_desc,
    const_dnnl_memory_desc_t diff_src_desc,
    const_dnnl_memory_desc_t diff_weights_desc,
    const_dnnl_memory_desc_t diff_dst_desc,
    const_dnnl_primitive_desc_t hint_fwd_pd,
    const_dnnl_primitive_attr_t attr
    )

Creates a primitive descriptor for a PReLU (leaky ReLU with trainable alpha parameter) backward propagation primitive.

NOTE:

weights descriptor and diff_weights descriptor are allowed to be initialized with dnnl_format_tag_any or with format_kind set to dnnl_format_kind_any.

Parameters:

primitive_desc	Output primitive descriptor.
engine	Engine to use.
src_desc	Source memory descriptor.
weights_desc	Alpha parameters memory descriptor.
diff_src_desc	Diff source memory descriptor.
diff_weights_desc	Diff alpha parameters memory descriptor.
diff_dst_desc	Diff destination memory descriptor.
hint_fwd_pd	Primitive descriptor for a respective forward propagation primitive.
attr	Primitive attributes (can be NULL).

Returns:

dnnl_success on success and a status describing the error otherwise.

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Intel® oneAPI Deep Neural Network Developer Guide and Reference

PReLU

Overview

Detailed Documentation