mask mymask 
a[10:8] bb23[7:0]; 

endmask 


values val1
0 aa
1 bb
endvalues


values val2
12 cc
default 13 dd

14 ee

endvalues

:JNIL:12: 

x=aa,   xx=xxq;

y=bb; 

:JMP:11:

z=zzq, w=wwq;

end