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[SOLVED] Compare xmm6, xmm8

 
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kagato1980
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PostPosted: Sat Jul 01, 2023 2:31 pm    Post subject: [SOLVED] Compare xmm6, xmm8 Reply with quote
I want to check if xmm6 and xmm8 contain the same value.

I think I can use something like "pcmpeqb xmm6,xmm8" but haven't gotten it to work yet. Should I store the values first, before doing any comparisons on them?

In pseudo code, I want something like:

Code:
cmp xmm6,xmm8
je code


Last edited by kagato1980 on Sun Jul 02, 2023 12:54 am; edited 1 time in total
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YoucefHam
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PostPosted: Sat Jul 01, 2023 3:51 pm    Post subject: Re: Compare xmm6, xmm8 Reply with quote
kagato1980 wrote:
I want to check if xmm6 and xmm8 contain the same value.

I think I can use something like "pcmpeqb xmm6,xmm8" but haven't gotten it to work yet. Should I store the values first, before doing any comparisons on them?
........


Use COMISS https://wiki.cheatengine.org/index.php?title=Assembler:Commands:COMISS

Code:

comiss xmm6, xmm8
ja code
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Csimbi
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PostPosted: Sat Jul 01, 2023 7:25 pm    Post subject: Reply with quote
The answer would depend on what value you have in xmm6 and xmm8.
If it's single-prec floating point value, YoucefHam's code should work fine.
I'd recommend you read the Intel Developer's Manual.
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