Question

I have to translate C++ code into MIPS. It is expected to have an output of: Value of a: 25 Value of b: 31 Value of c: 18 Value of d: 49

Here is the C++ code:

I need to translate this C++ into MIPS code.

#include 

using namespace std;



int main(void)
{

        int a = 5;
        int b = 6;
        int c = 7;
        int d;

        d = -1;

        if ( a < 10){
                a++;
        }else{
                a--;
        }

        d = a + c;
        c = a + d;

        if( b < 10 ) {
                b++;
                c--;
        }else{
                b--;
                c++;
        }

        a = c + b;
        b = c + d;

        if(b < c && b > a){
                d = a + b;
        }else if (b > c || c < a){
                d = b + c;
        }

        cout << "Value of a: " << a << endl;
        cout << "Value of b: " << b << endl;
        cout << "Value of c: " << c << endl;
        cout << "Value of d: " << d << endl;
        return 0;
}

Here is what was give.

.data
endl: .asciiz "\n" # used for cout << endl;
albl: .asciiz "Value of a: " # label for a
blbl: .asciiz "Value of b: " # label for b
clbl: .asciiz "Value of c: " # label for c
dlbl: .asciiz "Value of d: " # label for d
.text

# a --> $s0
# b --> $s1
# c --> $s2
# d --> $s3
main:

  

(fill in here)

exit:
la $a0, albl # puts albl into arg0 (a0 register) for cout
addi $v0, $0, 4 # puts 4 in v0 which denotes we are printing a string
syscall # make a syscall to system
  
move $a0, $s0 # puts a into arg0 (a0 register) for cout
addi $v0, $0, 1 # puts 1 in v0 to denote we are printing an int
syscall # make a syscall to system

la $a0, endl # puts the address of the string endl into a0
addi $v0, $0, 4 # puts 4 into v0 saying we are printing a string
syscall

la $a0, blbl # puts blbl into arg0 (a0 register) for cout
addi $v0, $0, 4 # puts 4 in v0 which denotes we are printing an string
syscall # make a syscall to system
  
move $a0, $s1 # puts b into arg0 (a0 register) for cout
addi $v0, $0, 1 # puts 1 in v0 to denote we are printing an int
syscall # make a syscall to system

la $a0, endl # puts the address of the string endl into a0
addi $v0, $0, 4 # puts 4 into v0 saying we are printing a string
syscall

la $a0, clbl # puts clbl into arg0 (a0 register) for cout
addi $v0, $0, 4 # puts 4 in v0 which denotes we are printing a string
syscall # make a syscall to system
  
move $a0, $s2 # puts c into arg0 (a0 register) for cout
addi $v0, $0, 1 # puts 1 in v0 to denote we are printing an int
syscall # make a syscall to system

la $a0, endl # puts the address of the string endl into a0
addi $v0, $0, 4 # puts 4 into v0 saying we are printing a string
syscall

la $a0, dlbl # puts dlbl into arg0 (a0 register) for cout
addi $v0, $0, 4 # puts 4 in v0 which denotes we are printing a string
syscall # make a syscall to system
  
move $a0, $s3 # puts d into arg0 (a0 register) for cout
addi $v0, $0, 1 # puts 1 in v0 to denote we are printing an int
syscall # make a syscall to system

la $a0, endl # puts the address of the string endl into a0
addi $v0, $0, 4 # puts 4 into v0 saying we are printing a string
syscall

addi $v0,$0, 10
syscall

Answer 1

Got your main code here

li   $s0, 5           # load value 5, into $s0 [i.e, a]
li   $s1, 6
li   $s2, 7
li   $s3, -1
li   $t0, 10

slt      $t1, $s0, $t0       # is a<10?
beq   $t1, 0, ELSE1       # if no, then go to else part
add   $s0, $s0, 1           # if yes, then increment a by 1
j         ENDIF1                # end of if
ELSE1 :
   addi   $s0, $s0, -1      # decrement a by 1
ENDIF1 :

add   $s3, $s0, $s2       # d=a+c
add   $s2, $s0, $s3       # c=a+d

slt      $t1, $s1, $t0       # is b<10?
beq   $t1, 0, ELSE2       # if no, then go to else part
add   $s1, $s1, 1          # if yes, then increment b by 1
addi   $s2, $s2, -1       # and decrement, c by 1
j   ENDIF2                    # end of if
ELSE2 :
   addi   $s1, $s1, -1       # decrement b by 1
   add   $s2, $s2, 1       # and increment, c by 1
ENDIF2 :

add   $s0, $s2, $s1       # a=c+b
add   $s1, $s2, $s3       # b=c+d

slt      $t1, $s1, $s2        # is (b<c)?
slt      $t2, $s0, $s1       # is (a<b)?
beq   $t1, 0, ELSEIF       # if false, then go to ELSEIF
beq   $t2, 0, ELSEIF       # if false, then go to ELSEIF
add   $s3, $s0, $s1       # if true, d=a+b
j         DONE                   # DONE
ELSEIF :
   slt       $t1, $s2, $s1       # is (c<b)?
   slt       $t2, $s2, $s0       # is (c>a)?
   beq   $t1, 1, LABEL       # if true, goto LABEL
   beq   $t2, 1, LABEL       # if true, goto LABEL
   j         DONE           # if false, then DONE
LABEL:
   add       $s3, $s1, $s2     # d=b+c
DONE :