i have some code in mips assembler and i'm getting something like in the title. As you can see, i have $li $v0, 10 and syscall so does anybody know what's wrong with it?
.data
text0: .asciiz "Enter strng: \n"
buf0: .space 100
.text
.globl main
main:
la $a0, text0
li $v0, 4
syscall
la $a0, buf0
li $a1, 99
li $v0, 8
syscall
li $t0, 'a'
li $t1, 'z'
li $t2, 0x20
la $t3, buf0
loop_begin:
lb $t4, ($t3)
beq $t4, $zero, loop_end
blt $t4, $t0, increment_ptr
bgt $t4, $t1, increment_ptr
sub $t4, $t4, $t2
sb $t4, ($t3)
increment_ptr:
addi $t3, $t3, 1
b loop_begin
loop_end:
la $a0, buf0
li $v1, 4
syscall
li $v0, 10
syscall
I can't reproduce your error message. Perhaps you did a Reinitialize in SPIM without reloading the assembly file.
Anyway, you're not setting up the final print_string system call properly:
li $v1, 4 # <-- SHOULD BE $v0
syscall
If you had used the single-stepping feature in SPIM to debug your code you probably would've found this, so I suggest that you make use of it for future development.