SH_CSS_YEE_SCALE_SHIFT
(asiWk1 + asiWk2) >> (11 - SH_CSS_YEE_SCALE_SHIFT);
(0 - asiWk3) >> (11 - SH_CSS_YEE_SCALE_SHIFT);
(asiWk1 - asiWk2) >> (11 - SH_CSS_YEE_SCALE_SHIFT);
(asiWk3) >> (11 - SH_CSS_YEE_SCALE_SHIFT);