c++ - Simple Assembly Language doubts -


i had worked out code assignment , tells me i'm not doing correctly.. hope can take @ it. thank you!

 area   reset, code, readonly    entry    ldr  r1, = 0x13579ba0   mov  r3, #0   mov  r4, #0   mov  r2, #8  loop  cmp  r2, #0   bge   done    ldr  r5, [r1, r4]   ,  r5, r5, #0x00000000   add  r3, r3, r5   add  r4, r4, #4    sub  r2, r2, #1   b    loop   ldr  r0, [r3] done  b    done    end

write arm assembly program add hexadecimal digits in register 1 , save sum in register 0. example, if r1 initialized follows:

        ldr    r1, =0x120a760c

when program has run completion, register 0 contain sum of 1+2+0+a+7+6+0+c.

you need use following in solution: · 8-iteration loop · logical shift right instruction · , instruction (used force selected bits 0)

i know did not use lsr. should put it? i'm getting started on assembly hope makes improvements on code..


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