cvc \
  +define+TIMING_SIM \
  +acc \
  +sdf_noerrors +sdf_nowarns \
  +show_canceled_e +suppress_warns+653+3102 \
  -v SIM/prim_tsim.v \
  impl/pnr/modem.vo \
  SIM/toplevel_tb.v \
  SIM/globals.v \
  +sdf_annotate+impl/pnr/modem.sdf+toplevel_tb.m_toplevel \
  +maxdelays \
  +librescan
./cvcsim