AbsBackward {#dev_guide_op_absbackward}
=======================================

## General

AbsBackward operation computes gradient for Abs operation.

\f[ dst = \begin{cases} diff\_dst & \text{if}\ src > 0 \\
    -diff\_dst & \text{if}\ src < 0 \\
    0 & \text{if}\ src = 0 \\
    \end{cases} \f]

## Operation attributes

AbsBackward operation does not support any attribute.

## 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 | `diff_dst` | Required

### Outputs

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

## Supported data types

AbsBackward operation supports the following data type combinations.

Src | Diff_dst | Diff_src
-- | -- | --
f32 | f32 | f32
f16 | f16 | f16
bf16 | bf16 | bf16
