* do i=1 to 8 by 2
L 3,1 r3 index and start value 1
LA 4,2 r4 step 2
L 5,8 r5 to value 8
LOOPI EQU *
... loop 4 times (r3=1,3,5,7)
BXLE 3,4,LOOPI r3=r3+r4; if r3<=r5 then loop