RE: [Discuss-gnuradio] Using gnu-radio for ARM NEON

[Bob McGwier]

It is actually an ARMv7a.

This a LATER chip than the ARM11, much less the ARM9.  The NEON is a
powerful 128 bit wide SIMD processor capable of doing floating point
arithmetic.

Bob


This is definitely going to make a VERY nice low power SDR board.  Another
we should consider is the OMAP-L137 which has 
ARRL SDR Working Group Chair
Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
NJQRP, QRP ARCI, QCWA, FRC.
"Trample the slow ....  Hurdle the dead"


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Philip Balister
Sent: Tuesday, October 14, 2008 9:11 PM
To: address@hidden
Subject: Re: [Discuss-gnuradio] Using gnu-radio for ARM NEON

On Tue, Sep 30, 2008 at 9:24 PM, John Gilmore <address@hidden> wrote:
>> Do you mind adding NEON to this list?  NEON is a SIMD unit on ARM
>> Cortex-A8 processors. Information on NEON instructions is at
>>
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0204h/Bcfjicf
>> j.html.
>> Sorry it si the superseded link, I'm too lazy to find the current one
>> :)
>
> This assembler language manual gives pretty good details (except
> actual instruction encodings):
>
>
http://infocenter.arm.com/help/topic/com.arm.doc.dui0204h/DUI0204H_rvct_asse
mbler_guide.pdf
>
> I also tried looking at NEON for the ARM-9, but got:
>
>  http://infocenter.arm.com/help/topic/com.arm.doc.ddi0409a/index.html
>
>  "Cortex-A9 NEON Media Processing Engine Technical Reference Manual
>   Revision: r0p0

The Cortex-A9 is not the same as an arm9. The Beagle uses a Cortex-A8
which is an armv7 architecture processor. Confusing? Yes. An arm9
processor uses an armv5 instruction set. (From memory)

The arm7 technical reference is not public, but if you ask nicely you
can get a copy. Needing it to implement NEON based filters for GNU
Radio was a good reason.

Bottom line: companies are still "funny" about doucmentation for high
end products, but attitudes are changing very slowly.

Philip
>
>   This is a placeholder for a restricted document that is not
>   available from this site. Please contact ARM for more information."
>
>        John
>
>
>
> _______________________________________________
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>


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