faster *=  and /=
faster *=  and /=

pfasante/fplll,malb/fplll,cr-marcstevens/fplll,shi-bai/fplll,cr-marcstevens/fplll,gbonnoron/fplll,fplll/fplll,blowfish880/fplll,shi-bai/fplll,malb/fplll,fplll/fplll,blowfish880/fplll,GottfriedHerold/fplll,fplll/fplll,dstehle/fplll,shi-bai/fplll,pfasante/fplll,gbonnoron/fplll,pfasante/fplll,blowfish880/fplll,gbonnoron/fplll,malb/fplll,shi-bai/fplll,cr-marcstevens/fplll,fplll/fplll,GottfriedHerold/fplll,cr-marcstevens/fplll,dstehle/fplll,fplll/fplll,dstehle/fplll,GottfriedHerold/fplll