Use the MARS IDE for the following questions. Submit your MIPS code as separate

Question

Use the MARS IDE for the following questions. Submit your MIPS code as separate files (one per question). Files should be self-contained and runnable. For #2, submit a screenshot of the console output with your completed assignment. [10] Consider the following MIPS procedure. Note that $a0 and $a1 are input arguments and both initially contain the integers a and b, respectively. Assume that SvO is used for the output. 1. add $t0, Szero, zero beq $a1, $zero, finish add $t0, $t0, a0 addi al, $al, -1 j loop loop: # ? finish: addi $to, $t0, 100 add $v0, $t0, Szero [5] Add comments to describe what each line in assembly is doing, then summarize in one sentence what the whole program accomplishes. a. b. [5] This code can be optimized, i.e. written using fewer instructions. Re-write the code using at most 3 instructions

Explanation / Answer

Please find the comments for the code:::

.text

add $t0,$zero,$zero #moving zero to register t0

loop : beq $a1,$zero,finish #if a1 value is zero jump to finish

add $t0,$t0,$a0 #add a0 to t0

addi $a1,$a1,-1 #reduce one from a1

j loop #continue loop

finish: addi $t0,$t0,100 #add 100 in to

add $v0,$t0,$zero #add 0 to to and save to v0

optimized code for the same:

=========================================================

.text

loop : add $t0,$t0,$a0 #add a0 to t0

sub $a1,$a1,1 #reduce one from a1

bnez $a1,loop #if a1 value is not zero jump to loop

addi $v0,$t0,100 #add 0 to t0 and save to v0 for output only

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