FIX_SHIFT
#define FIX_SCALE (1LL << FIX_SHIFT)
(((uint64)target->timing.pixel_clock * 1000) << FIX_SHIFT) /
>> FIX_SHIFT;
FIX_SCALE / 2) >> FIX_SHIFT) & RADEON_HORZ_STRETCH_RATIO_MASK;
FIX_SCALE / 2) >> FIX_SHIFT) & RADEON_VERT_STRETCH_RATIO_MASK;
(tv_timing->h_active_len + tv_timing->h_active_delay) << (FIX_SHIFT - 1)) / tv_timing->scale;
v_ratio = si->flatpanels[crtc->flatpanel_port].v_ratio >> (FIX_SHIFT - 16);