Mips blank space on address

Question

So I have a string of chars. I need to check if a character is blank space " "/ ascii 32. How can I give an address ascii value of blank space so I can use it in if/else?

.data 
userInput: .space 40
.text
main:
li $v0, 8
la $a0, userInput
li $a1, 40
syscall

li $t1,0
    la $t0,userInput

loop:

li $a3, 32 #can i give this address 32 ascii value?
lb   $a0,0($t0)
beqz $a0,done
addi $t0,$t0,1 #going true the characters
bne  $t0, $a3, L1    # branch if ! ( char == ' ' ) 
addi $t1,$t1,1 #add blank space
L1: addi $t2,$t2,1 #add characters  
j     loop
done:

li   $v0,1
addi $t1, $t1, -1
add  $a0, $0,$t1
syscall

li $a0, 32
li $v0, 11  
syscall

li   $v0,1
addi $t2, $t2, -1
add  $a0, $0,$t2
syscall


li   $v0,10
syscall

Change your `bne` to use `$a0` instead of `$t0` – Craig Estey Apr 24 '17 at 01:22 — Craig Estey, Apr 24 '17 at 01:22
@CraigEstey thanks man it worked perfectly. – Upe Apr 24 '17 at 15:07 — Upe, Apr 24 '17 at 15:07

Adam · Accepted Answer · 2017-04-24T13:40:57.857

2

.data   

         blankSpace: .ascii  " "

.text
 main:

         la $a3, blankspace
         lb $t3,0($a3)

Alternative you can directly load the ASCII value for space which is 0x20 in ASCII table.

 li $a3, 0x20

edited Apr 24 '17 at 13:40

answered Apr 24 '17 at 12:14

Adam

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`li $t3,$a3` is invalid. In that sequence, you would want `lb $t3,0($a3)` to get the ascii space into `$t3` – Craig Estey Apr 24 '17 at 13:36

Mips blank space on address

1 Answers1