.bss
    a: .space 2
    b: .space 2
    c: .space 2
    d: .space 2
 
.text
.global _main
 _main:
 mov #2,w0
 mov w0,a
 mov #2048,w0
 mov w0,b
 mov #4,w0
 mov w0,c
 mov #0,w0
 mov w0,d
 do:
 mov a,w1
 mov c,w2
 mov b,w3
 mov d,w4
 cp w2,w1
 bra LTU,else
 if:
 add w1,w1,w1
 mov w1,a
 lsr w3,w4,w0
 com w0,w0
 mov w0,b
 sub w0,w1,w0
 mov w0,c
 bra end_else
else:
    mov a,w1
    mov b,w2
    mov c,w3
    mov d,w4
    xor w2,w1,w2
    mov w2,b
    lsr w1,w1
    mov w1,a
    add w1,w2,w3
    mov w3,c
    end_else:
    inc w4,w4
    while:
    mov #10,w5
    cp w4,w5
    bra LTU,do
 done:
    goto done
    .end

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