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Playing with dwords?

 
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sportskid300
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PostPosted: Tue Jun 05, 2007 8:43 pm    Post subject: Playing with dwords? Reply with quote
As far as I know, I have to keep moving dwords into registers to mess with them.
Is there a way around this?
The reason I ask is because Im trying to make a simple program that spits out a specified number of terms in the Fibonacci sequence.
In case you didn't know, the Fibonacci sequence works like this:
1st term: 1
2nd term: 1
3rd term: addition of the first terms (2)
4th term: addiction of the last 2 terms (1+2=3)
5th term: addition of the last two terms (3+2=5)
So on and so forth.
This is as far as I got:
Code:

include \masm32\include\masm32rt.inc

.data

ass dd 1
ass1 dd 1
count dd 0
timer dd 0

.code

start:

call main
invoke ExitProcess, 0

main proc

mov ass, 1
mov ass1, 1
mov count, sval(input("How many terms of the Fibonacci sequence would you like shown? "))
mov eax, count
sub eax, 2
mov count, eax
cmp count, 0
jg first
je only
invoke ExitProcess, 0
only:
print chr$(10,"1",10,10,"1",10,10)
push 1000
call Sleep
invoke ExitProcess, 0
first:
print chr$(10,"1",10,10,"1",10,10)
do:
mov eax, ass
mov ebx, ass1
add eax, ebx
print str$(eax)
mov ass, eax
mov ass1, ebx
call space
mov eax, ass
mov ebx, ass1
add ebx, eax
print str$(ebx)
mov ass, eax
mov ass1, ebx
call space
jmp do

main endp

space proc

print chr$(10,10)
mov ecx, timer
mov edx, count
inc ecx
cmp ecx, edx
jne dont
push 1000
call Sleep
invoke ExitProcess, 0
dont:
mov timer, ecx
mov edx, count
push 800
call Sleep
ret

space endp

end start

It assembles just fine, but if you run it, it spits out:
1
1
2
2
3
3
etc...
Thanks for the help!
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sponge
I'm a spammer
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Joined: 07 Nov 2006
Posts: 6009
PostPosted: Tue Jun 05, 2007 9:06 pm    Post subject: Reply with quote
thats because the extended register set is 32 bits or a dword... so you have to move it in. or else it wont fit... for smaller registers use the unextended set...ax bx dx cx... di si... etc. or even smaller ah al bh bl ch cl dh dl
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sportskid300
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PostPosted: Tue Jun 05, 2007 9:09 pm    Post subject: Reply with quote
wait what?
sponge I need ur MSN :'(
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Thanks to Mr.Mohammed for the Avatar!
http://forum.cheatengine.org/viewtopic.php?t=92760&sid=b5cfb5d8e759c2b023910472b2fac2e8 EXCELLENT ASM TUT!

If you need help, ask!
http://www.youtube.com/watch?v=cW44BpXpjYw INSANE Line Rider!
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