read_vpe_c0_vpecontrol
write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE);
subcode = (read_vpe_c0_vpecontrol() & VPECONTROL_EXCPT)
write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() &