U
    ‰d  ã                   @   s8   d dl Z d dlZddd„Zddd„Zdd„ Zd	d
„ ZdS )é    NFc              	   C   sN   | j s|j rtdƒ‚t | ¡}t|j|j|j|j|j	|j|j|ƒ\|_|_|S ©NzFusion only for eval!)
ÚtrainingÚAssertionErrorÚcopyÚdeepcopyÚfuse_conv_bn_weightsÚweightÚbiasÚrunning_meanÚrunning_varÚeps)ÚconvÚbnÚ	transposeZ
fused_conv© r   ú9/tmp/pip-unpacked-wheel-ua33x9lu/torch/nn/utils/fusion.pyÚfuse_conv_bn_eval   s    

     ÿÿ
r   c           
      C   sÀ   |d krt  |¡}|d kr$t  |¡}|d kr6t  |¡}t  || ¡}|rfddgdgt| jƒd   }	nddgdgt| jƒd   }	| ||  |	¡ } || | | | }t j | ¡t j |¡fS )Né   éÿÿÿÿé   )	ÚtorchÚ
zeros_likeZ	ones_likeÚrsqrtÚlenÚshapeZreshapeÚnnÚ	Parameter)
Zconv_wZconv_bÚbn_rmÚbn_rvÚbn_epsÚbn_wÚbn_br   Zbn_var_rsqrtr   r   r   r   r      s    


r   c                 C   sL   | j s|j rtdƒ‚t | ¡}t|j|j|j|j|j	|j|jƒ\|_|_|S r   )
r   r   r   r   Úfuse_linear_bn_weightsr   r	   r
   r   r   )Zlinearr   Zfused_linearr   r   r   Úfuse_linear_bn_eval#   s    
     þr#   c           
      C   sZ   |d krt  |¡}|t  || ¡ }| | d¡ }|| | | }	t j |¡t j |	¡fS )Nr   )r   r   r   Z	unsqueezer   r   )
Zlinear_wZlinear_br   r   r   r    r!   Zbn_scaleZfused_wZfused_br   r   r   r"   -   s    
r"   )F)F)r   r   r   r   r#   r"   r   r   r   r   Ú<module>   s
   



