M_ALD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, subtype_overflow));
M_CMP_MEMINDEX(REG_ITMP2, -4*DISPLAY_SIZE, REG_ITMP1, 2, REG_ITMP3);
M_ALD(REG_ITMP2, REG_ITMP2, OFFSET(vftbl_t, subtype_overflow));
M_CMP_MEMINDEX(REG_ITMP2, -4*DISPLAY_SIZE, REG_ITMP1, 2, REG_ITMP3);