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help with shufps


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#1 noatom   Members   -  Reputation: 767

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Posted 19 December 2012 - 11:51 AM

If there is someone who knows how to use it...please explain.I don't understand how the hex value affects the changes,and what is going on exactly.

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#2 Zaoshi Kaba   Crossbones+   -  Reputation: 3606

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Posted 19 December 2012 - 12:06 PM

This should help: http://msdn.microsoft.com/en-us/library/4d3eabky(v=vs.80).aspx

#3 noatom   Members   -  Reputation: 767

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Posted 19 December 2012 - 02:00 PM

It actually helped a lot.Even though the book I'm reading doesn't use that macro,it just uses a hex value to specify what and where to move,I understand it now.Thanks a lot!

Posted Image

But that is how the data looks in a register? It's read from right to left?
I thought only the shuffle command is read from right to left.

you know,if you'd give a shuffle command like 1,3,5,9 it would be read 9,5,3,1.But the data in the register is also put from right to left?

I mean does it look like this?
127.................................0 ?

Edited by noatom, 19 December 2012 - 02:12 PM.





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