How to use if/else or branches statement in Assembly language in MIPS on Mars(Program)

       Use of Branch Statement in MIPS 

Task 1:Write a program to assign grades (A, B, C) based on marks obtained by a student.
       I.            if the percentage is above 90, assign grade A
    II.            if the percentage is above 75, assign grade B
 III.            if the percentage is above 65, assign grade C

.data

total:.asciiz "Enter the total Marks:"

obtain:.asciiz "Enter the obtained marks:"

grade:.asciiz "Your marks are:"

A:.asciiz "\nA grade\n"

B:.asciiz "\nB grade\n"

C:.asciiz "\nC grade\n"

D:.asciiz "\nLess than 65%\n"

num1:.word 90

num2:.word 75

num3:.word 65

num4:.word 100

.text

lw $t5,num1

lw $t6,num2

lw $t7,num3

lw $t8,num4

main:

li $v0,4

la $a0,total

syscall

li $v0,5

syscall

move $t1,$v0

li $v0,4

la $a0,obtain

syscall

li $v0,5

syscall

move $t2,$v0

li $v0,4

la $a0,grade

syscall

mul $t3,$t2,$t8

div $t4,$t3,$t1

li $v0,1

move $a0,$t4

syscall

bge $t4,$t5,gradeA

bge $t4,$t6,gradeB

bge $t4,$t7,gradeC

blt $t4,$t7,gradeD

syscall

li $v0,10

syscall

gradeA:

li $v0,4

la $a0,A

syscall

li $v0,10

syscall

gradeB:

li $v0,4

la $a0,B

syscall

li $v0,10

syscall

gradeC:

li $v0,4

la $a0,C

syscall

li $v0,10

syscall

gradeD:

li $v0,4

la $a0,D

syscall

li $v0,10

syscall       

          

       
 

Task 2: Write a program to take an input integer from user and check whether an integer is positive or negative

       
.data
input:.asciiz "Enter an integer:"
A:.asciiz "\ninteger is positive\n"
B:.asciiz "\ninteger is negative\n"
.text
addi $t0,$zero,0
main:
li $v0,4
la $a0,input
syscall
li $v0,5
syscall
move $t1,$v0
blt $t1,$t0,negative
bge $t1,$t0,positive
syscall
li $v0,10
syscall
positive:
li $v0,4
la $a0,A
syscall
li $v0,10
syscall
negative:
li $v0,4
la $a0,B
syscall
li $v0,10
syscall

          

       
 

Task 3: Write a program to take an input integer from user and check if an integer is even or odd or neither

       

.data
input:.asciiz "Enter an integer:"
A:.asciiz "\ninteger is odd\n"
B:.asciiz "\ninteger is even\n"
num1:.word 2
.text
addi $t0,$zero,0
lw $t3,num1
main:
li $v0,4
la $a0,input
syscall
li $v0,5
syscall
move $t1,$v0
rem $t2,$t1,$t3
beq $t2,$t0,even
bne $t2,$t0,odd
syscall
li $v0,10
syscall
odd:
li $v0,4
la $a0,A
syscall
li $v0,10
syscall
even:
li $v0,4
la $a0,B
syscall
li $v0,10
syscall
          

       
 

Task 4: Write a program for a simple MIPS calculator which have different functions for different operations. Make a menu base selection screen using Branches statement. Ever operation should have its own function.

       

.data
State:.asciiz "Enter 1 to add\nEnter 2 to subtract\nEnter 3 to Multiply\nEnter 4 to divide:"
input1:.asciiz "Enter num1:"
input2:.asciiz "Enter num2:"
num1:.word 1
num2:.word 2
num3:.word 3
num4:.word 4
.text
lw $t5,num1
lw $t6,num2
lw $t7,num3
lw $t4,num4
main:
li $v0,4
la $a0,State
syscall
li $v0,5
syscall
move $t1,$v0
beq $t1,$t5,addition
beq $t1,$t6,subtraction
beq $t1,$t7,multiplication
beq $t1,$t8,division
syscall
li $v0,10
syscall
 
addition:
li $v0,4
la $a0,input1
syscall
li $v0,5
syscall
move $t2,$v0
li $v0,4
la $a0,input2
syscall
li $v0,5
syscall
move $t3,$v0
add $t4,$t2,$t3
li $v0,1
move $a0,$t4
syscall
li $v0,10
syscall
 
subtraction:
li $v0,4
la $a0,input1
syscall
li $v0,5
syscall
move $t2,$v0
li $v0,4
la $a0,input2
syscall
li $v0,5
syscall
move $t3,$v0
sub $t4,$t2,$t3
li $v0,1
move $a0,$t4
syscall
li $v0,10
syscall
 
multiplication:
li $v0,4
la $a0,input1
syscall
li $v0,5
syscall
move $t2,$v0
li $v0,4
la $a0,input2
syscall
li $v0,5
syscall
move $t3,$v0
mul $t4,$t2,$t3
li $v0,1
move $a0,$t4
syscall
li $v0,10
syscall
 
division:
li $v0,4
la $a0,input1
syscall
li $v0,5
syscall
move $t2,$v0
li $v0,4
la $a0,input2
syscall
li $v0,5
syscall
move $t3,$v0
div $t4,$t2,$t3
li $v0,1
move $a0,$t4
syscall
li $v0,10
syscall