Question

Implement the functionality of "main" function for the following C code in MIPS assembly. Comment your code including which registers represent the variables in the main function. Include the .data and the .text sections. Do not write the bit_count function.

int main() {

int count = 149;

int num = 432;

if (count + num > 534){

count = bit_count(num);

printf("%d bits to store the number", count);

}else{

printf("cannot count bit in %d",)

}

}

Answer 1

For above problem:

As ques says no need to write bit_count function so i assume to print the count value only.

.data msg1: .asciiz "Enter the first number: " msg2: .asciiz "\nEnter the second number: " bitsStore: .asciiz "\nbits to store the number" bitsNotStore: .asciiz "\ncannot count bit in " result: .asciiz "\nThe result of addition is: " comp: .word 534 .text li $v0,4 la $a0,msg1 // taking input for count syscall li $v0,5 syscall move $t1,$v0 // reading the count and loading to $t1 li $v0,4 la $a0,msg2 // taking input for num syscall li $v0,5 syscall move $t2,$v0 // reading the count and loading to $t1 Add $t3,$t1,$t2 // adding count and num and storing result in $t3 lw $t0, comp // load comp value declared in .data section in $t0 bgt $t3, $t0, numberGreater // if (count+num > comp) blt $t3, $t0, numberSmaller // if(count+num < comp) numberGreater: li $v0, 4 la $a0, bitsStore //printing msg syscall li $v0,1 move $a0,$t1 // according to question there is no need to write bit_count function syscall // so just print the value of count b exitLabel numberSmaller li $v0, 4 la $a0, bitsNotStore   //printing msg syscall li $v0, 1 move $a0,$t3 // print (count+ num) value syscall b exitLabel exitLabel: li $vo, 10 syscall

I above code i had take the input from user, according to the ques the values are pre defined as 149, 432, if you want to do so here is the code below:

.data comp: .word 534 count: .word 149 num: .word 432 .text w $t1, count w $t2, num lw $t0, comp // and continue the above program code from add command onward...

There can be other ways to solve the question, if you have doubts then ask...