VLD_MEM_VIFIFO_CONTROL
amvdec_clear_dos_bits(core, VLD_MEM_VIFIFO_CONTROL, 1);
amvdec_write_dos_bits(core, VLD_MEM_VIFIFO_CONTROL,
amvdec_write_dos(core, VLD_MEM_VIFIFO_CONTROL, 0);
amvdec_write_dos_bits(core, VLD_MEM_VIFIFO_CONTROL, 1);