sem [		stb		sth		stw		stx	] {
    set_op(new_inst,Op,3 ,1);
    Rx_src(new_inst,rs1); set_src2(new_inst,i,rs2,simm13) ;
    Rx_src(new_inst,rd);
    new_inst.align = align?cvt(uchar);
} where Op in [ 174 		175 		176 		177 	],
     align in [	0		1		2		3	];