struct dnnl::primitive_desc¶

Overview¶

A base class for descriptors of all primitives that have an operation descriptor and that support iteration over multiple implementations. More…

#include <dnnl.hpp>

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

    primitive_desc();

    primitive_desc(
        const_dnnl_op_desc_t desc,
        const primitive_attr* attr,
        const engine& aengine,
        const_dnnl_primitive_desc_t hint_fwd_pd,
        bool allow_empty = false
        );

    // methods

    bool next_impl();
    primitive_desc_base();
    primitive_desc_base();
    primitive_desc_base();
    primitive_desc_base();
};

// direct descendants

struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct rnn_primitive_desc_base;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;
struct primitive_desc;

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::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;

Detailed Documentation¶

A base class for descriptors of all primitives that have an operation descriptor and that support iteration over multiple implementations.

Construction¶

primitive_desc(
    const_dnnl_op_desc_t desc,
    const primitive_attr* attr,
    const engine& aengine,
    const_dnnl_primitive_desc_t hint_fwd_pd,
    bool allow_empty = false
    )

Constructs a primitive descriptor.

Note

If allow_empty is true, the constructor does not throw if a primitive descriptor cannot be created. But calling next_impl() in this case will throw.

Note

This is a low-level implementation detail that is typically not needed in application code.

Parameters:

desc	Constant C API operation descriptor.
attr	Pointer to primitive attributes. It is safe to pass nullptr to indicate absence of attributes.
aengine	Engine to use.
hint_fwd_pd	C API primitive descriptor for a forward propagation primitive. It is used as a hint for deciding which memory format to use for backward propagation or weights gradient.
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.

Methods¶

bool next_impl()

Advances the primitive iterator to the next implementation.

Returns:

true on success, and false if the last implementation reached, and the primitive descriptor itself is kept unchanged

primitive_desc_base()

Default constructor. Produces an empty object.

primitive_desc_base()

Constructs a primitive descriptor base object from a clone of a C API primitive descriptor after verifying that it is what the caller expects.

Note

The prim_kind should map to a primitive that does not have different values of propagation kind (e.g. dnnl::binary).

Note

Primitive descriptor base constructed this way does not support next_impl() (will throw).

Parameters:

pd	C API primitive descriptor to clone.
prim_kind	Expected primitive kind.

primitive_desc_base()

Constructs a primitive descriptor base object from a clone of a C API primitive descriptor after verifying that it is what the caller expects.

Note

Primitive descriptor base constructed this way does not support next_impl() (will throw).

Parameters:

pd	C API primitive descriptor to clone.
prim_kind	Expected primitive kind.
aprop_kind	Expected propagation kind.

primitive_desc_base()

Constructs a primitive descriptor base object from a clone of a C API primitive descriptor after verifying that it is what the caller expects.

Note

Primitive descriptor base constructed this way does not support next_impl() (will throw).

Parameters:

pd	C API primitive descriptor to clone.
prim_kind	Expected primitive kind.
prop_kind1	Expected propagation kind (option 1).
prop_kind2	Expected propagation kind (option 2). This value is checked if the check with `prop_kind1` fails.

enum dnnl::primitive::kind struct dnnl::primitive_desc_base

oneDNN v2.5.4 documentation

struct dnnl::primitive_desc¶

Overview¶

Inherited Members¶

Detailed Documentation¶

Construction¶

Methods¶