Question

spim mips processor

Answer 1

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code.asm

.data
prompt1 : .asciiz "\nInput a character (lowercase letter or digit 0-9)"
error : .asciiz "\nNeed a lower case letter or digit. Try again"
retry : .asciiz "\nDo you want to re-run the program(Y for yes)?"
char :.asciiz "0123456789abcdefghijklmnopqrstuvwxyz"
prompt3 : .asciiz "\n The ordered string is : "
prompt4 : .asciiz "\n Program ternimated "
display : .space 40
.text

askAgain:

li $v0,4
la $a0,prompt1 #it will print prompt
syscall
li $v0, 12
syscall
bge $v0,'a',checkZ
j checkDigit
checkZ:
ble $v0,'z',lowercase
checkDigit:
bge $v0,'0',check9
j errorShow
check9:
ble $v0,'9',digit
j errorShow
lowercase:
digit:
move $t1,$v0 #move data to t0
li $v0,11
li $a0,'\n'
syscall
li $v0,4
la $a0,prompt3 #it will print prompt
syscall
la $t0,char
loop:      
   lb $t2,0($t0)
   beqz $t2,end  
  
   li $v0,11
   move $a0,$t2 #move character to print
   syscall
   beq $t2,$t1,end
   add $t0,$t0,1
   j loop
end:
  
li $v0,4
la $a0,retry #it will print prompt
syscall  

li $v0, 12
syscall

beq $v0,'Y',askAgain
beq $v0,'y',askAgain

li $v0,4
la $a0,prompt4 #it will print prompt
syscall  
li $v0,10
syscall

errorShow:
li $v0,4
la $a0,error #it will print prompt
syscall
j askAgain

.data prompt1 : .asciiz "\nInput a character (lowercase letter or digit 0-9)" error : .asciiz "\nNeed a lower case letter or digit. Try again" retry : .asciiz "\nDo you want to re-run the program (Y for yes)?" char :.asciiz "0123456789 abcdefghijklmnopqrstuvwxyz" prompt3 : .asciiz "\n The ordered string is : " prompt4 : .asciiz "\n Program ternimated " display : .space 40 .text askAgain: li $v0,4 la $a0, prompti #it will print prompt syscall li $v0, 12 syscall bge $v0, 'a', checkz j checkDigit checkz: ble $v0, 'z', lowercase checkDigit: bge $v0, '0', check9 j errorShow check9: ble $v0, '9', digit

j errorShow lowercase: digit: move $t1,$v0 #move data to to li $v0,11 li $a0,'\n' syscall li $v0,4 la $a0, prompt3 #it will print prompt syscall la $t0, char loop: lb $t2,0($t0) beqz $t2, end li $v0,11 move $a0,$t2 #move character to print syscall beq $t2, $t1, end add $t0,$t0,1 j loop end: li $v0,4 la $a0, retry #it will print prompt

li $v0, 12 syscall beq $v0, 'Y', askAgain beq $v0, 'y', askAgain #it will print prompt li $v0,4 la $a0, prompt4 syscall li $v0,10 syscall error Show: li $v0,4 la $a0,error syscall j askAgain #it will print prompt

output:

ssages Run I/O Input a character (lowercase letter or digit 0-9) The ordered string is : 0123456789abcde Do you want to re-run the program (Y for yes)?y Input a character (lowercase letter or digit 0-9) - Need a lower case letter or digit. Try again Input a character (lowercase letter or digit 0-9) [ Need a lower case letter or digit. Try again Input a character (lowercase letter or digit 0-9)] Need a lower case letter or digit. Try again Input a character (lowercase letter or digit 0-9) L Need a lower case letter or digit. Try again Input a character (lowercase letter or digit 0-9) 1 The ordered string is : 0123456789abcdefghijkl Do you want to re-run the program (Y for yes) ?n Program ternimated -- program is finished running --