BiasAdd {#dev_guide_op_biasadd}
===============================

## General

Add bias to channel dimension of input. This is a special `Add` with bias
restricted to be 1-D. Broadcasting is supported.

  \f[ \dst(n,c,h,w) = \src(n,c,h,w) + \bias(c) \f]

## Operation attributes

Attribute Name | Description | Value Type |Supported Values | Required or Optional
-- | -- | --| --|--
[data_format](@ref dnnl::graph::op::attr::data_format) | Controls how to interpret the shape of `src` and `dst`. |string |`NCX` , `NXC` (default)  | Optional

## Execution arguments

The inputs and outputs must be provided according to below index order when
constructing an operation.

### Inputs

| Index | Argument Name | Required or Optional |
| ----- | ------------- | -------------------- |
| 0     | `src`         | Required             |
| 1     | `bias`        | Required             |

@note `bias` is a 1D tensor to be added to `src` tensor. The size should be the
same as size of channel dimension of `src` tensor.

### Outputs

| Index | Argument Name | Required or Optional |
| ----- | ------------- | -------------------- |
| 0     | `dst`         | Required             |

## Supported data types

BiasAdd operation supports the following data type combinations.

| Src  |  Bias  | Dst     |
| ---- | ------ | ------- |
| f32  | f32    | f32     |
| bf16 | bf16   | bf16    |
| f16  | f16    | f16     |
