.. SPDX-FileCopyrightText: 2020-2022 Intel Corporation .. .. SPDX-License-Identifier: CC-BY-4.0 .. include:: ../../replacements.inc.rst BiasAddBackward ############### BiasAddBackward operation computes the gradients on the bias tensor for BiasAdd operator. This op accumulates all the values from :math:`\diffdst` into the channel dimension, the axis depends on the layout of \src tensor. Operation Attributes ******************** +--------------------+----------------+------------+-----------+-------------+ | Attribute | Description | Value Type | Supported | Required or | | Name | | | Values | Optional | +====================+================+============+===========+=============+ | |attr_data_format| | Controls | string | ``NCX`` , | Optional | | | how to | | ``NXC`` | | | | interpret | | (default) | | | | the shape | | | | | | of | | | | | | ``diff_dst`` | | | | | | and | | | | | | ``diff_bias``. | | | | +--------------------+----------------+------------+-----------+-------------+ Execution Arguments ******************* The inputs and outputs must be provided according to the below index order when constructing an operation. Inputs ====== ===== ============= ==================== Index Argument Name Required or Optional ===== ============= ==================== 0 ``diff_dst`` Required ===== ============= ==================== Outputs ======= ===== ============= ==================== Index Argument Name Required or Optional ===== ============= ==================== 0 ``diff_bias`` Required ===== ============= ==================== Supported Data Types ******************** BiasAddBackward operation supports the following data type combinations. ======== ========= diff_dst diff_bias ======== ========= f32 f32 bf16 bf16 f16 f16 ======== =========