Homework Solution: The following program tries to copy words from the address in register $a0 to the address in register $a1, counting the numbe…

    The following program tries to copy words from the address in register $a0 to the address in register $a1, counting the number of words copied in register Sv0. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers Sv1, Sa0, and $a1. This terminating word should be copied but not counted 1. addi $vO. $zero, 0 lw Sv1, 0(Sao) sw Sv1, 0(Sa1) addi Sa0, Sa0, 4 addi $a1, Sa1,4 # Initialize count # Read next word from source # Write to destination # Advance pointer to next source # Advance pointer to next destination loop: beq $v1, $zero, loop # Loop if word copied != zero There are multiple bugs in this MIPS program; fix them and turn in a bug-free version.
    The following program tries to copy words from the address in register $a0 to the address in register $a1, counting the number of words copied in register $v0. The program stops copying when it finds a word equal to 0. You do not have to preserve the contents of registers $v1, $a0, and $a1. This terminating word should be copied but not counted. addi $v0. $zero, 0 # Initialize count loop: lw $v1, 0 ($a0) # Read next word from source sw $v1, 0 ($a1) # Write to destination addi $a0, $a0, 4 # Advance pointer to next source # addi $a1, $a1, 4 #Advance pointer to next destination beq $v1, $zero, loop # Loop if word copied ! = zero There are multiple bugs in this MIPS program: fix them and turn in a bug-free version.

    Expert Answer

     
    Ans:: The multiple bugs to be fixed are the following::

    The forthcoming program tries to vision expression from the discourse in record $a0 to the discourse in record $a1, suming the enumerate of expression copied in record Sv0. The program stops visioning when it finds a acsum resembling to 0. You do referable keep to guard the fluctuation of chronicles Sv1, Sa0, and $a1. This terminating acsum should be copied except referable sumed 1. addi $vO. $zero, 0 lw Sv1, 0(Sao) sw Sv1, 0(Sa1) addi Sa0, Sa0, 4 addi $a1, Sa1,4 # Initialize sum # Read present acsum from fount # Write to use # Advance pointer to present fount # Advance pointer to present use loop: beq $v1, $zero, loop # Loop if acsum copied != cipher There are multiple bugs in this MIPS program; secure them and hinge in a bug-permitted rendering.

    The forthcoming program tries to vision expression from the discourse in record $a0 to the discourse in record $a1, suming the enumerate of expression copied in record $v0. The program stops visioning when it finds a acsum resembling to 0. You do referable keep to guard the fluctuation of chronicles $v1, $a0, and $a1. This terminating acsum should be copied except referable sumed. addi $v0. $zero, 0 # Initialize sum loop: lw $v1, 0 ($a0) # Read present acsum from fount sw $v1, 0 ($a1) # Write to use addi $a0, $a0, 4 # Advance pointer to present fount # addi $a1, $a1, 4 #Advance pointer to present use beq $v1, $zero, loop # Loop if acsum copied ! = cipher There are multiple bugs in this MIPS program: secure them and hinge in a bug-permitted rendering.

    Expert Exculpation

     

    Ans::

    The multiple bugs to be secureed are the forthcoming::

    1.Bug-1 : Sum ‘$v0’ is initialized to 0., referable to –1 to escapeing suming the 0 account.

    2.Bug-2 : sum ‘$v0’ isn’t incremented.

    3.Bug-3 : Loops if the worrd copied is resemblings to 0 rathr than referable-equals.

    => The Bug permitted rendering is as below:-

    For bright interpret I deposit outoutverse enumerates.

    First single is $vo init to -1 in outoutverse 1.

    1. addi $v0, $zero, -1 # Initializing to escape sumng 0 account.

    2. loop:: lw, $v1, 0($a0) # Reading the present acsum frm the fount.

    3. addi $v0, $v0, 1 # Incrementing the sum-acsum copied.

    4. sw $v1, 0($a1) # Writing it to the destintion.

    5. addi $a0, $a0, 4 # Advnce-pointer to the present-source.

    6. addi $a1, $a1, 4 # Advnce-pointer to the present-destination.

    7. bne $v1, $zero, loop # Looping if the acsum copied referable resemblings ( != ) to 0.

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