Runtime error (crashes on input) in MIPS (using MARS) -
i having trouble code. getting runtime error on line 28: runtime exception @ 0x00400044: address out of range 0x00000001.
the program supposed take input , return in descending order.
main: move $s0,$gp #get intial point save array addi $t0,$0,1 # $t0 = 1 add $t1,$zero,$zero # add $t2,$zero,$zero # add $t3,$zero,$zero # add $t6,$zero,$zero add $t4,$zero,$zero sub $t7,$zero,1 # terminate li $v0,4 # system call put string la $a0,msg1 # syscall # add $s1,$s0,$zero # copy pointer array in $s1 entervalues: li $v0,5 # value in v0 syscall # beq $v0,$t7,bubblesort # end of string run bubblesort lb $v0,0($s1) # **here error** addi $s1,$0,1 # move $s1 pointer 1 add $t5,$s1,$zero # $t5 stores end value j entervalues bubblesort: add $t4,$s0,$zero addi $t6,$0,1 #s1-1 -> s0 sub $s1,$s1,$t0 beq $s1,$s0,ending add $s2,$s0,$zero loopinterno: lb $t1,0($s2) # first element lb $t2,1($s2) # second element slt $t3,$t2,$t1 # beq $t3,$zero,proximo # sb $t2,0($s2) # sb $t1,1($s2) # proximo: addi $s2,$0,1 # bne $s2,$s1,loopinterno # li $v0,4 # system call put string la $a0,msg5 # syscall # li $v0,4 # system call put string la $a0,msg4 # syscall # li $v0,4 # system call put string la $a0,msg5 # syscall # imprime: li $v0,1 lb $a0,0($t4) syscall li $v0,4 la $a0,msg2 syscall addi $t4,$0,1 bne $t4,$t5,imprime jal bubblesort ending: li $v0,4 # system call put string la $a0,msg6 # syscall # li $v0,5 any appreciated!
your problem seems in instruction:
addi $s1,$0,1 # move $s1 pointer 1 which not comment states. puts immediate 1 in $s1. addi adds second , third argument , puts addition in first argument.
you should have issued:
addi $s1,$s1,1 # move $s1 pointer 1 you same thing on code. example when issue
addi $t6,$0,1 #s1-1 -> s0 you probable meant
addi $t6,$t6,1 #s1-1 -> s0
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