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Re: FPU support for PowerPC MPC8xxx
- From: agyhoo <agyhoo at yahoo dot com>
- To: Gary Thomas <gary at mlbassoc dot com>
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Wed, 10 Mar 2004 06:15:59 -0800 (PST)
- Subject: Re: [ECOS] FPU support for PowerPC MPC8xxx
Hi Gary,
Thanks for your response. I was able to get the s/w
floating point feature working....there was a configuration
option for printing floating point format in the printf
functions that was turned off.
I did notice that the CYGHWR_HAL_POWERPC_FPU option
(presumably for the h/w FP support) was turned on for the
8260. Is this a mistake then or is h/w FP support available
for that specific variant?
- Anunoy
--- Gary Thomas <gary@mlbassoc.com> wrote:
>
> agyhoo said:
> > Hi,
> >
> > Is there support for the FPU in the PowerPC MPC8xxx HAL
> > variant? Looking at the CDL file, it seems that there
> isn't
> > (the cdl for the MPC8260 variant however does support
> it).
> >
>
> Currently, it's turned off. It would be some effort to
> get it
> working on the PowerPC.
>
> > I am trying to execute a calculate a simple FP
> expression
> > but I keep getting integer results.
>
> There is software floating point available.
>
> Can you share what you've tried? It may just need a
> little
> tweak to get going (at least with the software version).
>
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