Move coefficient (32.0f) to the end of every iteration.
Move coefficient (32.0f) to the end of every iteration.

It could reduce 7 multiplications every iteration.

Signed-off-by: Yan Wang <8ca54580088a7ffe1dd243d1c16c6d1f04463d55@linux.intel.com>

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv