#### LSU EE 3755  Fall  2009 MIPS Homework  template.#############
#### Instructions:
####
#### Copy this to a file( name it  f09.asm) and save on  your class account.   
#### Use this file for your solution.  
#### Your entire solution should be on this file.
##
##  Problem  0 : Write down your name and your  account.
##  Your  Name :  #######
##  Your  Account: #######



##  Problem  1(20pts): 

## LOOP:
## 0x400000  add $s3, $s2, $s1
## addi  $s1, $s3,0x20
## nop
## beq  $s1, $s3, LOOP	
 
## (For the problem 1)
## Write  Machine code for the above 4 instructions without looking the Book or Notes.
### (Hexadecimal format)
##  Hint:
###opcode for add is 0 and func field is 0x20.
###opcode for addi is 8 and think about rt and rs fields.
###opcode for beq is 4
###register number for $s0 is 16 
##  your answer for the problem 1.
## 
##
##
##
##

##// Problem  2(20pts):  Branch target address.
##2.1)Compute this branch target address for delayed branch(5pts)
## 0x400000  bne $s0, $s1, 2
## your answer
##       
##2.2)Compute this branch target address for non-delayed branch(5pts)
## 0x400000  bne $s0, $s1, 2
## your answer
## 
##2.3) Compute this branch target address for delayed branch(5pts)
##0x40001c    bne $s0,$s1,-3
## your answer
##
##2.4)Compute this branch target address for non-delayed branch(5pts)
##0x40001c    bne $s0,$s1,-3
## your answer
##

##//Problem  3(60pts) 
##Use  main  at the beginning instead of __start  and 
##assume  delayed branch  when you are using xspim or pcspim .
##Write a MIPS program to print the text just like output format (which is given)  after you read the text(textdata) 
##After scanning textdata,  you are required to write a program to print a) whole text b)you save wards at a ##memory(the starting address of this memory is “saved_words”) and print words from the memory one at a ##time c) you print the words at the memory in reverse order. Words here means character or group of ##characters separated by space. For the simplicity of the program, assume every character in the paragraph ##is upper case. When you save the words at the memory(the starting address of this memory is “saved_words## ”)   for b),  you separate words by putting space between words.



#############################################################

##(Look at the problem 4 of Spring 2007 MIPS Homework. The code will help you a little bit)
##
           .data
       
textdata:
        .asciiz "IN A DISTANT GALAXY EONS BEFORE THE CREATION OF THE MYTHICAL PLANET KNOWN                           AS EARTH \n"

return:
        .asciiz "\n"

word_msg:
        .asciiz  " The text is "

        .align 4
word_msg1:
        .asciiz  " The saved words are  "

        .align 4
word_msg2:
        .asciiz  "  The  words  which are printed in reverse order "

        .align 4


.text
        .globl main
main:


##hint:  use    .space  to save the words at  .data

##for example:  saved_words:  .space 300  //to save the words 
##                                          //at this memory location