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64 Bit values on a 32 Bit OS

 
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zauguin
How do I cheat?
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Joined: 28 Dec 2011
Posts: 1

PostPosted: Wed Dec 28, 2011 3:09 am    Post subject: 64 Bit values on a 32 Bit OS Reply with quote

Hi,

I want to customize a 8 Byte value with an autoassembler custom type.
The Problem is, that I have to return 32 Bit sized Integers.
What can I do?
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Dark Byte
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Joined: 09 May 2003
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Location: The netherlands

PostPosted: Wed Dec 28, 2011 8:43 am    Post subject: This post has 1 review(s) Reply with quote

Are you really going to work with values of 4294967296 and higher ?

Just convert the 8 byte to a 4 byte integer.

Example1: a floating point value like double is 8 bytes but you can just convert it to a simple integer. And if you care about the digits you could multiply the result by 10 before converting to an integer. (Just keep in mind values are then displayed multiplied by 10)

Example 2: The value is stored as 8 bytes, but it's actually an xor key and the encrypted value

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zauguin
How do I cheat?
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Joined: 28 Dec 2011
Posts: 1

PostPosted: Wed Dec 28, 2011 5:24 pm    Post subject: Reply with quote

Thanks,

but now I need MMX Instructions, but the Auto Assembler doesn't know the MM0, MM1, ... Register.
What I have to do to make it work?
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Dark Byte
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PostPosted: Thu Dec 29, 2011 2:27 pm    Post subject: Reply with quote

Which instruction do you want to use the MM* registers with?
Only a few instructions take the MM* registers. (MOV isn't one of them)

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