Function onednn_sys::dnnl_primitive_attr_set_rnn_data_qparams

pub unsafe extern "C" fn dnnl_primitive_attr_set_rnn_data_qparams(
    attr: dnnl_primitive_attr_t, 
    scale: f32, 
    shift: f32
) -> dnnl_status_t

Set quantization scale and shift parameters for RNN data tensors.

For performance reasons, the low-precision configuration of the RNN primitives expects input activations to have the unsigned 8-bit integer data type. The scale and shift parameters are used to quantize floating-point data to unsigned integer and must be passed to the RNN primitive using attributes.

The quantization formula is scale * (data + shift).

@note Quantization scale and shift are common for src_layer, src_iter, dst_iter, and dst_layer.

Example usage: @code // RNN parameters int l = 2, t = 2, mb = 32, sic = 32, slc = 32, dic = 32, dlc = 32; // Activations quantization parameters float scale = ..., shift = ..;

dnnl_primitive_attr_t rnn_attr;
// Create default attributes
dnnl_primitive_attr_create(&rnn_attr);

// Set scale and shift for int8 quantization of activation
dnnl_primitive_attr_set_rnn_data_qparams(rnn_attr, scale, shift);

// Create and configure rnn op_desc
dnnl_rnn_desc_t rnn_d;
dnnl_primitive_desc_t rnn_pd;
dnnl_primitive_desc_create(&rnn_pd, &rnn_d, attr, engine, NULL);

@endcode

@param attr Primitive attributes. @param scale The value to scale the data by. @param shift The value to shift the data by. @returns #dnnl_success on success and a status describing the error otherwise.