/ The first program -- adding i and j in global variables.

    .globl i
    .globl j
main:
    mov #3 -> %r0              / i = 3
    st  %r0 -> i
    mov #2  -> %r0             / j = 2
    st  %r0 -> j
    ld  i   -> %r0             / j = i + j
    ld  j   -> %r1
    add %r0,%r1  -> %r1
    st  %r1 -> j
    ret