     // bottom_diff[mask[index]] = cache[mask[index]];
   }  // (if index < nthreads)
 }
+*/
 
 template <typename Dtype>
 __global__ void AvePoolBackward(const int nthreads, const Dtype* top_diff,

  return Dtype(0.);
}

/*
template <typename Dtype>
__global__ void MaxPoolBackward(const int nthreads, const Dtype* top_diff,
    const int num, const int channels, const int height,

    bottom_diff[index] = gradient;
  }  
}

/*
__device__ double atomicAdd(double* address, double val)
{
    unsigned long long int* address_as_ull =
