.data

numCodeWords:
        .word 4

codeWords:
        .word 626086716
        .word 944197466
        .word 906254600
        .word 1459902484

pattern:
        .word 0x57243C7A

# Your code goes below this line

dataLine:          .asciiz ".data"
messageSizeLine:   .asciiz "messageSize:"
messageLine:       .asciiz "message:"
wordLine:          .asciiz "        .word  "
alignLine:         .asciiz "        .align  2\n"
asciizLine:        .asciiz "        .asciiz \""
quoteLine:         .asciiz "\""
newLine:           .asciiz "\n"

.text

main:

               # prologue
               subu   $sp, $sp, 24
               sw     $fp, 0($sp)
               sw     $ra, 4($sp)
               addiu  $fp, $sp, 24

               # load codeWords into register $s0
               la     $s0, codeWords

               # load numCodeWords into register $s1
               la     $t0, numCodeWords
               lw     $s1, 0($t0)

               # load pattern into register $s2
               la     $t0, pattern
               lw     $s2, 0($t0)

               # load counter into register $s7
               li     $s7, 0

               # load a message size counter into $s6
               li     $s6, 0

          loopBegin:
               beq    $s7, $s1, endLoop

               # load first word of codeWords into register $t3
               lw     $t3, 0($s0)

               # xor the word and put the value into $t2
               xor    $t2, $t3, $s2

               # store the value into $s0 again
               sw     $t2, 0($s0)

               # add 4 to get to the next word
               addi   $s0, 4

               # increment the message size counter by 4
               addi   $s6, 4

               # increment the loop counter by 1
               addi   $s7, 1

               # repeat loop
               j loopBegin
          
          endLoop:

               # reload address of the codeWords
               la     $s0, codeWords

               # print out dataLine
               la     $a0, dataLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               # print out messageSizeLine
               la     $a0, messageSizeLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               # print out wordLine followed by the size of the message
               la     $a0, wordLine
               li     $v0, 4
               syscall

               la     $a0, 0($s6)
               li     $v0, 1
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               # print out alignLine
               la     $a0, alignLine
               li     $v0, 4
               syscall

               # print out messageLine
               la     $a0, messageLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall

               # print out asciizLine and the string, followed by quoteLine
               la     $a0, asciizLine
               li     $v0, 4
               syscall

               la     $a0, 0($s0)
               li     $v0, 4
               syscall

               la     $a0, quoteLine
               li     $v0, 4
               syscall

               la     $a0, newLine
               li     $v0, 4
               syscall