Hello Christian,

Iam sure, this is quite late from the time you have posted this query,
but were you able to find a solution for your issue?

I guess, ARn used in such addressing modes, by default include XAR as well.
However, i would like to know, if there is something i missed to understand. Would be good to
understand, more on the issue and the solution.

Thanks,
Gayathri

Hello:
>I am starting to work with assembly for the c5000 (5009).
>I am working on 2 buffers in the following way:
>.....
>RPT CSR
>MACM *AR0+, *AR1+, AC0
>.....
>
>The addresses are passed as C function parameters with AR0 and AR1.
>The problem is that the buffers that I am pointing with AR0 and AR1 are 
>in an external SDRAM (addresses are longer than 16 bit), so the MAC wont 
>work.
>I understand that I can address such a buffer with XAR0 and XAR1, but 
>how can I do that with teh MAC instruction??
>
>Thanks for the help.
>
>Christian
Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution
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HI,
    It is true that extended part of ARn's are taken as default for addressing
but How can complier know that I have to generate a address which is more than 16 bits. This
can be done with some options at build time.(build options) memory model should be large or far
what ever you say.

           This
can fix the problem.

 if it didn't then reply to mail id.

pradeep.

--- On Sun, 9/3/08, g...@hotmail.com
<g...@hotmail.com> wrote:
From: g...@hotmail.com
<g...@hotmail.com>
Subject: [c55x] Re: ARn vs. XARn addressing
To:
c...@yahoogroups.com
Date: Sunday, 9 March, 2008, 7:37 PM



    

            


Hello Christian,



Iam sure, this is quite late from the time you have posted this query,

but were you able to find a solution for your issue?



I guess, ARn used in such addressing modes, by default include XAR as well.

However, i would like to know, if there is something i missed to understand. Would be good to
understand, more on the issue and the solution.



Thanks,

Gayathri



Hello:

>I am starting to work with assembly for the c5000 (5009).

>I am working on 2 buffers in the following way:

>.....

>RPT CSR

>MACM *AR0+, *AR1+, AC0

>.....

>

>The addresses are passed as C function parameters with AR0 and AR1.

>The problem is that the buffers that I am pointing with AR0 and AR1 are 

>in an external SDRAM (addresses are longer than 16 bit), so the MAC wont 

>work.

>I understand that I can address such a buffer with XAR0 and XAR1, but 

>how can I do that with teh MAC instruction? ?

>

>Thanks for the help.

>

>Christian

>

>


    



      
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