proc; 
opt; opt_const -mux_undef; opt;
rename -hide;;;
#converting pmux to mux
techmap -map techlibs/common/pmux2mux.v;;
memory -nomap;;
#flatten design
flatten;;
#converting asyn memory write to syn memory
memory_unpack; 
#cell output to be a single wire
splitnets -driver;
setundef -zero -undriven;
opt;;;