MishBackward {#dev_guide_op_mishbackward}
=========================================

## General

MishBackward operation computes gradient for Mish.

\f[ dst & = diff_{dst} * \frac{e^{src} * \omega}{\delta^{2}}, where \\
\omega & = e^{3src} + 4 * e^{2src} + e^{src} * (4 * src + 6) + 4 * (src + 1) \\
\delta & = e^{2src} + 2 * e^{src} + 2 \f]

## Operation attributes

MishBackward 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

MishBackward operation supports the following data type combinations.

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