convert \
    -check    PRE_11_3_IOSTD_CHECK \
    -desdir  {D:\DSP reference guide\DSP Reference Guide\Ref. Guide Design Examples\Liberov11.3\VHDL\Adder_Sub_88bit\designer\Adder_Sub_88bit} \
    -design  {Adder_Sub_88bit} \
    -fam SmartFusion2 \
    -die PA4M5000_N \
    -pkg fg896
