Ë
    éÓ^já  ã                   óF   — d Z ddlZddlmZ  G d„ dej                  «      Zy)aª   Global Response Normalization Module

Based on the GRN layer presented in
`ConvNeXt-V2 - Co-designing and Scaling ConvNets with Masked Autoencoders` - https://arxiv.org/abs/2301.00808

This implementation
* works for both NCHW and NHWC tensor layouts
* uses affine param names matching existing torch norm layers
* slightly improves eager mode performance via fused addcmul

Hacked together by / Copyright 2023 Ross Wightman
é    N)Únnc                   ó@   ‡ — e Zd ZdZ	 	 	 	 ddededefˆ fd„Zd„ Zˆ xZ	S )ÚGlobalResponseNormz) Global Response Normalization layer
    ÚdimÚepsÚchannels_lastc                 óL  •— ||dœ}t         ‰| �  «        || _        |rd| _        d| _        d| _        nd| _        d| _        d| _        t        j                  t        j                  |fi |¤Ž«      | _
        t        j                  t        j                  |fi |¤Ž«      | _        y )N)ÚdeviceÚdtype)é   é   éÿÿÿÿ)r   r   r   r   )r   é   r   )r   r   r   r   )ÚsuperÚ__init__r   Úspatial_dimÚchannel_dimÚwb_shaper   Ú	ParameterÚtorchÚzerosÚweightÚbias)Úselfr   r   r   r
   r   ÚddÚ	__class__s          €úZ/var/www/ramen.bs-engineer-server.com/venv/lib/python3.12/site-packages/timm/layers/grn.pyr   zGlobalResponseNorm.__init__   sŽ   ø€ ð ¨Ñ/ˆÜ‰ÑÔØˆŒÙØ%ˆDÔØ!ˆDÔØ)ˆD�Mà%ˆDÔØ ˆDÔØ)ˆDŒMä—l‘l¤5§;¡;¨sÑ#9°bÑ#9Ó:ˆŒÜ—L‘L¤§¡¨SÑ!7°BÑ!7Ó8ˆ�	ó    c                 ó^  — |j                  d| j                  d¬«      }||j                  | j                  d¬«      | j                  z   z  }|t        j                  | j                  j                  | j                  «      | j                  j                  | j                  «      ||z  «      z   S )Nr   T)Úpr   Úkeepdim)r   r!   )Únormr   Úmeanr   r   r   Úaddcmulr   Úviewr   r   )r   ÚxÚx_gÚx_ns       r   ÚforwardzGlobalResponseNorm.forward,   sˆ   € Ø�f‰f�q˜d×.Ñ.¸ˆfÓ=ˆØ�S—X‘X $×"2Ñ"2¸D�XÓAÀDÇHÁHÑLÑMˆØ”5—=‘= §¡§¡°·±Ó!>ÀÇÁ×@PÑ@PÐQU×Q^ÑQ^Ó@_ÐabÐehÑahÓiÑiÐir   )g�íµ ÷Æ°>TNN)
Ú__name__Ú
__module__Ú__qualname__Ú__doc__ÚintÚfloatÚboolr   r)   Ú__classcell__)r   s   @r   r   r      s=   ø„ ñð
 Ø"&ØØñ9àð9ð ð9ð  õ	9ö.jr   r   )r-   r   r   ÚModuler   © r   r   ú<module>r4      s$   ðñó Ý ôj˜Ÿ™õ jr   