# Exercise 2.34 code
# 
#   CPE 315
#   fall 2001
#
# By: Dan Stearns

# Description:
#   Program copies words pointed to by $a0 to the address $a1 
#   until delimiter 0 is found.
#   Words copied are counted in $v0
#           
#
# Notes:  this is the code after bugs are fixed.
#   


# Data Area
.data
buffer1:
.word 9,8,7,6,5,4,0

buffer2:
.word -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1

# Program 
.text

main:

# load buffer addresses
  la    $a0, buffer1
  la    $a1, buffer2

# initialize counter so sentinel doesn't count
  addi  $t0, $0, -1

loop:
  lw    $v1, 0($a0)
  sw    $v1, 0($a1) 

# count words
  addi  $t0, $t0, 1

# increment pointers to next word
  addi  $a0, $a0, 4
  addi  $a1, $a1, 4

# test for sentinel
  bne   $v1, $0, loop

# Exit
  ori     $v0, $0, 10
  syscall