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Re: GA144 Documents

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rickman <gnuarm@gmail.com> writes:
> No, I can't say I have.  But how much of the hard to understand
> details are similar between the S40 and the GA144?  

My impression is "quite a lot" but I don't know for sure.

> It is interesting to note that there is no one posting in this group
> that has done anything with the chip.  Am I the only one even thinking
> hard about it?  

Albert V. did the ParPi program (I guess on the Seaforth40) and has
mentioned some issues about a GA144 version.  I've put some thought into
GA144 programming, but probably less than you have.  I'm not a hardware
guy, so my ideas about using the chip in an actual circuit are fairly
primitive.

> I've actually got a new idea that might just be "perfect" for the
> GA144.....  Around 100 ns per 18 bit multiply or say 500 ns for a
> double precision product.  That's 288 MMACS or 6000 bins!  If the FFT
> is broken into bite sized pieces to fit the memory limits the
> potential resolution is even higher.

How does 288 MMACs compare to a conventional DSP of comparable cost and
power consumption?  I thought DSP's usually had special features like
bit-reversed addressing, single cycle MAC, and zero-overhead loops, to
make FFT go very fast.

E.g.: http://www.ti.com/lsds/ti/dsp/platform/c5000/device.page

might be slightly lower end.  Some other ones reachable from here

http://www.ti.com/lsds/ti/dsp/home.page

go up to 300+ GMACs (multicore), but presumably cost a lot.

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GA144 Documents rickman <gnuarm@gmail.com> - 2012-08-15 19:44 -0400
  Re: GA144 Documents "M. Simon" <msimon6808@yahoo.com> - 2012-08-15 18:11 -0700
    Re: GA144 Documents rickman <gnuarm@gmail.com> - 2012-08-16 19:27 -0400
  Re: GA144 Documents "M. Simon" <msimon6808@yahoo.com> - 2012-08-15 18:18 -0700
  Re: GA144 Documents Paul Rubin <no.email@nospam.invalid> - 2012-08-15 18:21 -0700
    Re: GA144 Documents rickman <gnuarm@gmail.com> - 2012-08-16 19:49 -0400
      Re: GA144 Documents Paul Rubin <no.email@nospam.invalid> - 2012-08-16 19:18 -0700
  Re: GA144 Documents shitstormtrooper11@gmail.com - 2012-08-16 17:36 -0700
    Re: GA144 Documents rickman <gnuarm@gmail.com> - 2012-08-17 14:28 -0400
      Re: GA144 Documents shitstormtrooper11@gmail.com - 2012-08-17 22:32 -0700
      Re: GA144 Documents "M. Simon" <msimon6808@yahoo.com> - 2012-08-23 06:21 -0700
        Re: GA144 Documents rickman <gnuarm@gmail.com> - 2012-08-27 18:15 -0400
    Re: GA144 Documents Arnold Doray <invalid@invalid.com> - 2012-08-23 13:24 +0000
      Re: GA144 Documents shitstormtrooper11@gmail.com - 2012-08-26 14:08 -0700

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