BiasAddBackward operation computes the gradients on the bias tensor for BiasAdd operator. This op accumulates all the values from $$\diffdst$$ into the channel dimension, the axis depends on the layout of src tensor.

## Operation Attributes#

Attribute

Name

Description

Value Type

Supported

Values

Required or

Optional

data_format

Controls how to interpret the shape of diff_dst and diff_bias.

string

NCX , NXC (default)

Optional

## 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