IGC_WUFC_EXT_FLX8
wufc_ext |= (IGC_WUFC_EXT_FLX8 << (input->index - 8));
if (!(wufc_ext & (IGC_WUFC_EXT_FLX8 << (i - 8))))
wufc_ext &= ~(IGC_WUFC_EXT_FLX8 << (reg_index - 8));