On Thu, 26 Jul 2007, j.chitte wrote:
> Hi,
>
> I now there is no FP available on 7250 and recall seeing Eddie post a
> rather terse "NO" when someone asked the question.
>
> I have managed to find some information on the subject which seemed
> to indicate fp emulation could be done but I'd need uclibc which in
> itself required a 2.6.x kernel (which is not currently supported by
> TS).
>
> I need to asses how much customisation effort this is going to imply
> and whether I need to find another way to implement what I need
> without fp.
My advice would be to first figure out if you really need FP. I've seen a
lot of code use FP for no good reason - it could have been done with fixed
point (integer) quite simply. Maybe it's a symptom of my age - I remember
a time when the norm was for FP to be a large overhead you used only if
you had to.
> Could someone give me details on what is needed to achieve softfp on
> 7250?
>
>
> Also, from the EP9302 data sheet it see this:
>
> MaverickCrunch? Math Engine
> ? Floating point, Integer and Signal Processing
> Instructions
> ? Optimized for digital music compression and
> decompression algorithms.
> ? Hardware interlocks allow in-line coding.
>
> This seems to indicate that there is some hardware FP available from
> this chip. Can anyone explain why this is not available from the 7250?
>
> http://www.cygwin.com/ml/crossgcc/2005-01/msg00093.html
> maybe this was just removed from TS products because there were too
> many issues.
>
> Many thanks for any info that will help me asses the best way forward.
>
> regards. js.
>
>
>
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