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i'm a rookie, please help with MIPS

so i'm learning MIPS right now and i think i get the hang of things, mind you it's all relatively easy (so i've been told), but i can't seem to get around this one problem. i was given a C++ fragment and need to convert (translate) it directly to MIPS.

and that equation is array[a+b] = array[a-b]+d

intially i thought, this would be the same as array[a]+array[b] = array[a+b]...and of course i was wrong.

though wrong, i'd still like to post what i do have....and if someone can correct me and guide me to the right direction, that'll be great!

add        $t1, $s0, $s0                # $t1 = 2*a

add        $t1, $t1, $t1                # $t1 = 4*a

add        $t2, $s1, $s1                # $t1 = 2*b

add        $t2, $t2, $t2                # $t1 = 4*b

sub         $t3, $t1, $t2                # $t3 = A[a] – A[b] (or A[a-b]

add        $t3, $t3, $t0                # $t3 = address of A[a-b]

lw        $t3, 0($t0)                # $t3 = A[c-b]

add        $t4, $t3, $s2                # $t4 = A[a-b] + d

add        $t5, $t1, $t2                # $t5 = A[a] + A[b]

add        $t5, $t5, $t0                # $t5 = address of A[a+b]

lw        $t5, 0($t0)                # $t5 = A[a+b]

sw        $t5, 0($t0)                # A[a+b] = $t3

thanks in advance
to the admin: see i have put a HONEST effort...so can i now get help? /lol

Re: i'm a rookie, please help with MIPS

Quote:

Originally Posted by ulethgeek

thanks in advance
to the admin: see i have put a HONEST effort...so can i now get help? /lol

That's all we ask :D

Re: i'm a rookie, please help with MIPS

Quote:

Originally Posted by ulethgeek (Post 61804)

add    $t1, $s0, $s0        # $t1 = 2*a

add    $t1, $t1, $t1        # $t1 = 4*a

add    $t2, $s1, $s1        # $t1 = 2*b

add    $t2, $t2, $t2        # $t1 = 4*b

sub     $t3, $t1, $t2        # $t3 = A[a] – A[b] (or A[a-b]

add    $t3, $t3, $t0        # $t3 = address of A[a-b]

lw    $t3, 0($t0)        # $t3 = A[c-b]

add    $t4, $t3, $s2        # $t4 = A[a-b] + d

add    $t5, $t1, $t2        # $t5 = A[a] + A[b]

add    $t5, $t5, $t0        # $t5 = address of A[a+b]

lw    $t5, 0($t0)        # $t5 = A[a+b]

sw    $t5, 0($t0)        # A[a+b] = $t3

thanks in advance

Unless you have some la and lw instructions that you're not putting here, then you are missing the actual putting of values into registers

Re: i'm a rookie, please help with MIPS