Question

Task 3 [35 marks] Write a MIPS program that does the following (in a correct, user-friendly way):  Greets the user, states the purpose of the program  Sequentially asks the user to provide integer coefficients A,B,C  Calculates discriminant D of quadratic polynomial. (Hint: D = B2 – 4×A×C)  Displays the calculated D value  Checks (in this order) whether discriminant is: o D = 0? Then, displays: “Quadratic polynomial has a sole root.” o D > 0? Then, displays: “Quadratic polynomial has two roots.” o Otherwise, displays: “Quadratic polynomial has no real roots.”  Properly terminates with appropriate closing message. Make sure to show the following items:  Source code in a readable, well-formatted (tabulated, commented) way  Screenshot of PC SPIM showing the emulator with your code successfully loaded  Screenshots of PC SPIM console displaying the results of running your program with the following test inputs: o A = 3; B = 4; C = 5 o A = 2; B = 6; C = 2 o A = 4; B = 8; C = 4

Answer 1

.data

msg1: .asciiz "Enter A: "

msg2: .asciiz "Enter B: "

msg3: .asciiz "Enter C: "

msg4: .asciiz "\nQuadratic polynomial has a sole root.\n"

msg5: .asciiz "\nQuadratic polynomial has two root.\n"

msg6: .asciiz "\nQuadratic polynomial has no real root.\n"

msg7: .asciiz "End of the program"

msg8: .asciiz "\nD = "

.text

main:

#print the msg1

li $v0, 4 #print string syscall value is 4

la $a0, msg1 #copy address of msg1 to $a0

syscall

#read value A

li $v0,5 #read integer syscall value is 5

syscall #read value stored in $v0

move $t0,$v0

#print the msg2

li $v0, 4 #print string syscall value is 4

la $a0, msg2 #copy address of msg2 to $a0

syscall

#read value B

li $v0,5 #read integer syscall value is 5

syscall #read value stored in $v0

move $t1,$v0

  

#print the msg3

li $v0, 4 #print string syscall value is 4

la $a0, msg3 #copy address of msg3 to $a0

syscall

#read value C

li $v0,5 #read integer syscall value is 5

syscall #read value stored in $v0

move $t2,$v0

mul $t3,$t1,$t1

li $s0,4

mul $t4,$s0,$t0

mul $t4,$t4,$t2

sub $t3,$t3,$t4

#print the msg8

li $v0, 4 #print string syscall value is 4

la $a0, msg8 #copy address of msg8 to $a0

syscall

#print D value

li $v0,1 #print integer syscall value is 1

move $a0,$t3 #copy $t3 to $a0

syscall

beq $t3,$zero,if

bgt $t3,$zero,else

# D < 0

#print the msg6

li $v0, 4 #print string syscall value is 4

la $a0, msg6 #copy address of msg6 to $a0

syscall

#jump tp exit

j exit

# D = 0

if:

#print the msg4

li $v0, 4 #print string syscall value is 4

la $a0, msg4 #copy address of msg4 to $a0

syscall

#jump to exit

j exit

# D > 0

else:

#print the msg5

li $v0, 4 #print string syscall value is 4

la $a0, msg5 #copy address of msg5 to $a0

syscall

exit:

#print the msg7

li $v0, 4 #print string syscall value is 4

la $a0, msg7 #copy address of msg7 to $a0

syscall

#terminate the program

li $v0, 10 #terminate the program syscall value 10

syscall

Hope this helps...!