MIPS ASSEMBLY : 1) Code in MIPS a function that allows to store the text entered

Question

MIPS ASSEMBLY :

1) Code in MIPS a function that allows to store the text entered by the user in a 300-byte buffer. The function must return the actual size of the entered text in number of bytes. The text could contain lines, that is to say that the symbol ' n' could be present. The end of reading is defined by both consecutive ' n' ' n' symbols. *Also if the user inputs more then 300 bytes is their a way to detect it and print a error and end the programme*

2) Code in MIPS a function that helps identify if the character passed in parameter represents a Latin alphabet letter (26 letters of alphabet English) lowercase or uppercase. Should look like this: bool letter(char l)

Explanation / Answer

Question 2(lowercaseletters)

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Code:-

#Variable declaration
.data
    input: .asciiz "Enter a alphabet:"
    outputTrue: .asciiz " true"
    outputFalse: .asciiz " false"
#main program
.text
     #input prompt to enter data
     la $a0,input
     li $v0,4
     syscall
     #read input character
     la $a0,input
     li $v0,12
     syscall
     #move value to $a0
     move $a0,$v0
     #call function
     jal letter
     #move return result to s0
     move $s0,$v0
     #if return result 1 then true else go to nolatin
     beq $s0,0,notlatin
     #print true
     la $a0,outputTrue
     li $v0,4
     syscall
     #end the program
     li $v0,10
     syscall
     #return 0 then print false
notlatin:
     la $a0,outputFalse
     li $v0,4
     syscall
     li $v0,10
     syscall
     #function definition
letter:
     #lattin small letter are in ascii 32,97-105,107-116,118,121 0r 122
       beq $a0,32,exit #compare each values with the user enred value
       bge $a0,97,next
loop: bge $a0,107,next1
loop1: beq $a0,118,exit
       beq $a0,121,exit
       beq $a0,122,exit
       #if not match return0
       li $v0,0
       jr $ra
next: ble $a0,105,exit
       j loop
next1:ble $a0,116,exit
        j loop1
      #if not match return1
exit:
     li $v0,1
     jr $ra

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Question1

ScreenShot

code

#variable declaration
.data
       buffer: .space 300
       output: .asciiz "You Wrote:"
       count: .ascii "Count of the text:"
#main program
.text
       li $s0,0
       li $v0,8 #take in input
       la $a0, buffer #load byte space into address
       li $a1, 300# allot the byte space for string if user enter more than 300 then exit
       move $t0,$a0 #save string to t0
       syscall
   
      
loop:   lb $a0,0($t0) # primary address = t0 address (load pointer)
         beqz $a0,exit
         addi $s0,$s0,1
         addi $t0,$t0,1
         j loop
exit:    la $a0,output #load and print "you wrote" string
         li $v0,4
         syscall
         la $a0, buffer #reload byte space to primary address
          move $t0,$a0
         li $v0,4 # print string
          syscall
          la $a0,count #load and print the count
         li $v0,4
         syscall
          move $a0,$s0#count of the characters or bytes
           li $v0,1 # print byte number
          syscall
         li $v0,10 #end program
         syscall

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