NEED ASAP!

I need help writing a mips/spim code that follows the following instructions below. The code must also work in QTspim

I am to implement the following c standard functions strcmp, strlen based off the implementation of strcpy in assembly language which is the following.

strcpy:

addi $sp, $sp, -4

sw $s0, 0($sp)

add $s0, $zero, $zero

L1:

add $t1, $s0, $a1

lb $t2, 0($t1)

add $t3, $s0, $a0

sb $t2, 0($t3)

beq $t2, $zero, L2

addi $s0, $s0, 1

j L1

L2:

lw $s0, 0($sp)

addi $sp, $sp, 4

jr $ra

These are the following instructions:

Use $a0 through $a3 as necessary for the standard C library's arguments to each function.

Return in $v0.

IMPORTANT Do *not* write a main program. You will be given a testing program soon.

It is fine if a lot of your functions look a lot like each other. In fact, that's a good sign.

Don't worry about overruns or exception cases.