Question

1. Rewrite this program (program #1 from last Labwork Assignment) to conform with the calling/callee standards as presented in call. Write a calling program that invokes your program that conforms to the standards as well

Write a MIPS program using a loop that multiplies two positive numbers by using repeated addition. For example, to multiply 3 x 6, the program would add 3 six times, or 3+3+3+3+3+3.

Answer 1

.data
msg1:   .asciiz "Enter number1: "
msg2:   .asciiz "Enter number2: "
msg3:   .asciiz "Result: "
.text
main:

   #print msg1
   li $v0,4   #print string syscall value is 4
   la $a0,msg1   #load address of msg1 to $a0
   syscall
   #read integer
   li $v0,5   #read integer syscall value is 5
   syscall       #read value stored in $v0
   move $t0,$v0
   #print msg2
   li $v0,4   #print string syscall value is 4
   la $a0,msg2   #load address of msg2 to $a0
   syscall
   #read integer
   li $v0,5   #read integer syscall value is 5
   syscall       #read value stored in $v0
   move $t1,$v0
   li $t3,0
loop:
   # add $t2 and $t0,result stores in $t2
   add $t2,$t2,$t0
   # add $t3 and 1,result stores in $t3
   addi $t3,$t3,1
   # branch for less than,if $t3 less than $t1,jump to label loop
   blt $t3,$t1,loop  
   #print msg3
   li $v0,4   #print string syscall value is 4
   la $a0,msg3   #load address of msg3 to $a0
   syscall

   #print counter
   li $v0,1   #print integer syscall value is 1
   move $a0,$t2   #copy value in $t2 to $a0
   syscall
   #terminate the program
   li $v0, 10 #terminate the program syscall value is 10
   syscall

data msg1: msg2: msg3: .text main: asciiz "Enter number1: " asciiz "Enter number2: " asciiz "Result: " #print string syscall value is 4 #load address of msg1 to $a0 #read integer syscall value is 5 #read value stored in $vo #print msg1 li $v0,4 la $a0, msg1 syscall #read integer li $v0,5 syscall move $t0,$v0 #print msg2 li $v0,4 la $a0, msg2 syscall #read integer li $v0,5 syscall move $t1,$v0 li $t3,0 #print string syscall value is 4 #load address of msg2 to $a0 #read integer syscall value is 5 #read value stored in $vo loop: # add $t2 and $to, result stores in $t2 add $t2,$t2,$to # add $t3 and 1, result stores in $t3 addi $t3,$t3,1 # branch for less than, if $t3 less than $t1, jump to label loop blt $t3,$t1, loop #print msg3 li $v0,4 #print string syscall value is 4 la $a0, msg3 #load address of msg3 to $a0 syscall #print counter li $v0,1 #print integer syscall value is 1 move $a0,$t2 #copy value in $t2 to $a0 syscall #terminate the program li $v0, 10 #terminate the program syscall value is 10

Enter numberl: 3 Enter number2: 6 Result: 181