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struct dnnl::lbr_gru_backward::desc

Overview

Descriptor for a LBR GRU backward propagation primitive. More…

#include <dnnl.hpp>

struct desc
{
    // fields

    dnnl_rnn_desc_t data;

    // construction

    desc(
        prop_kind aprop_kind,
        rnn_direction direction,
        const memory::desc& src_layer_desc,
        const memory::desc& src_iter_desc,
        const memory::desc& weights_layer_desc,
        const memory::desc& weights_iter_desc,
        const memory::desc& bias_desc,
        const memory::desc& dst_layer_desc,
        const memory::desc& dst_iter_desc,
        const memory::desc& diff_src_layer_desc,
        const memory::desc& diff_src_iter_desc,
        const memory::desc& diff_weights_layer_desc,
        const memory::desc& diff_weights_iter_desc,
        const memory::desc& diff_bias_desc,
        const memory::desc& diff_dst_layer_desc,
        const memory::desc& diff_dst_iter_desc,
        rnn_flags flags = rnn_flags::undef
        );
};

Detailed Documentation

Descriptor for a LBR GRU backward propagation primitive.

Construction

desc(
    prop_kind aprop_kind,
    rnn_direction direction,
    const memory::desc& src_layer_desc,
    const memory::desc& src_iter_desc,
    const memory::desc& weights_layer_desc,
    const memory::desc& weights_iter_desc,
    const memory::desc& bias_desc,
    const memory::desc& dst_layer_desc,
    const memory::desc& dst_iter_desc,
    const memory::desc& diff_src_layer_desc,
    const memory::desc& diff_src_iter_desc,
    const memory::desc& diff_weights_layer_desc,
    const memory::desc& diff_weights_iter_desc,
    const memory::desc& diff_bias_desc,
    const memory::desc& diff_dst_layer_desc,
    const memory::desc& diff_dst_iter_desc,
    rnn_flags flags = rnn_flags::undef
    )

Constructs a descriptor for LBR GRU backward propagation primitive.

The following arguments may point to a zero memory descriptor:

• src_iter_desc together with diff_src_iter_desc,

• bias_desc together with diff_bias_desc,

• dst_iter_desc together with diff_dst_iter_desc.

This would then indicate that the LBR GRU backward propagation primitive should not use them and should default to zero values instead.

Note

All memory descriptors may be initialized with dnnl::memory::format_tag::any value of format_tag.

Parameters:

aprop_kind	Propagation kind. Must be dnnl::prop_kind::backward.
direction	RNN direction. See dnnl::rnn_direction for more info.
src_layer_desc	Memory descriptor for the input vector.
src_iter_desc	Memory descriptor for the input recurrent hidden state vector.
weights_layer_desc	Memory descriptor for the weights applied to the layer input.
weights_iter_desc	Memory descriptor for the weights applied to the recurrent input.
bias_desc	Bias memory descriptor.
dst_layer_desc	Memory descriptor for the output vector.
dst_iter_desc	Memory descriptor for the output recurrent hidden state vector.
diff_src_layer_desc	Memory descriptor for the diff of input vector.
diff_src_iter_desc	Memory descriptor for the diff of input recurrent hidden state vector.
diff_weights_layer_desc	Memory descriptor for the diff of weights applied to the layer input.
diff_weights_iter_desc	Memory descriptor for the diff of weights applied to the recurrent input.
diff_bias_desc	Diff bias memory descriptor.
diff_dst_layer_desc	Memory descriptor for the diff of output vector.
diff_dst_iter_desc	Memory descriptor for the diff of output recurrent hidden state vector.
flags	Unused.

struct dnnl::lbr_gru_backward struct dnnl::lbr_gru_backward::primitive_desc