bf
  -mld-extension-reg-mask
  -mlock
  -mmac-24
  -mmac-d16
  -mmac_24
  -mmac_d16
  -mmin-max
  -mmin_max
  -mmul64
  -mno-mpy
  -mnorm
  -mrtsc
  -msimd
  -mswap
  -mswape
  -mtelephony
  -muser-mode-only
  -mxy