text: #ifndef IM2COL_H
  #define IM2COL_H
  
  void im2col_cpu(float *data_im,
                  int channels, int height, int width,
                  int ksize, int stride, int pad, float *data_col);
  
  #ifdef GPU
  
  void im2col_gpu(float *im,
           int channels, int height, int width,
           int ksize, int stride, int pad,float *data_col);
  
  #endif
  #endif
  