Question

MIPS Programming Assignment 4 (logical operations) Please write a complete MIPS assembly language programs for the following questions and print a hardcopy of your code to submit 1. Swap each pair of elements in the string "chararn be an even number of characters in "chararray". (see loop4.a) 2 "numbers" is an array of five words. Catculate the sum of aftetements in "number muttiples of 4. Use the and instruction, not div or remfor thisquestion(S 3. "number" is a word. Write it out in base 2 as a sequence of 32 bits. (See logic2.a file.)

Answer 1

KIPS CODE 1 :

swapTwoStrings:

            addiu   $sp, $sp, -24  

            sw $ra, 0($sp)    

            sw $fp, 4($sp)    

            addiu   $fp, $sp, 20

            add $t0, $zero, $a0        

            add $t1, $zero, $a1        

            add $t2, $zero, $a2       

            sll $t3, $t1, 2           

            sll $t4, $t2, 2           

            add $t5, $t0, $t3

            add $t6, $t0, $t4

            lw $t3, 0($t5)           

            lw $t4, 0($t6)           

            sw $t5, 0($t4)           

            sw $t6, 0($t3)                           

            lw $fp, 4($sp)

            lw $ra, 0($sp)

            addiu   $sp, $sp, 24

            jr $ra            

MIPS CODE 2:

.data

prompt1: .asciiz "\n\n Enter an integer:"

array: .space 24

linefeed: .asciiz "\n"

enterkey: .asciiz "Press any key to end the program."

.text

main:

li $s0, 0

for:

bge $s0, 6, end_for

li $v0, 4

la $a0, prompt1

syscall

li $v0, 5

syscall

move $t1,$v0

sw $t1,array($t0)

addi $t0,$t0,4

addi $s0,$s0,1

j for

end_for:

li $v0,4

la $a0,linefeed

syscall # print linefeed

li $v0,4

la $a0,enterkey

syscall # print enterkey

li $v0,5 # code for read_int

syscall #get int from user --> returned in $v0

li $v0,10 # code for exit

syscall # exit program