Hi David & Ian,
Thanks for the information.
>
> The soft-fp functions are included in libgcc. I believe the functions
> only are invoked if named patterns for the operations do not exist in
> the machine description or the named patterns report the operation as
> unsupported in hardware through the FAIL code path.
>
> David
>
> Take a look at libgcc/config.host, notably the addition of t-softfp to
> tmake_file. That refers to libgcc/config/t-softfp. I don't know if
> that is all that you need, but hopefully it will move you one step
> forward.
>
> Ian
I have updated the t-<target> file in gcc/config/<target> folder to add
t-soft-fp to the tmake_file. Now the soft-fp routines are getting used.
I have one more doubt. Is there any way to obtain the following behavior?
* By default the libgcc routines should be used.
* If we specify the option say -msoft-fp during compilation, then the
soft-fp routines should be used instead of default libgcc routines.
I have done the modifications to support the "-msoft-fp" option.
Please suggest how to proceed further.
Thanks
Rathish.C
> -----Original Message-----
> From: Ian Lance Taylor [mailto:iant@xxxxxxxxxx]
> Sent: Tuesday, May 18, 2010 7:52 PM
> To: Rathish C
> Cc: gcc-help@xxxxxxxxxxx
> Subject: Re: Adding "soft-fp" support to a new target
>
> Rathish C <Rathish.C@xxxxxxxxxxxxxxx> writes:
>
> > I am trying to add the soft-fp support to a new target. I have
> > checked the implementation done in rs6000 port, and done the
> > similar modifications to our port. I have made the following
> > changes.
> >
> > (1) Added the following files
> > t-fprules-softfp
> > sfp-machine.h
> >
> > (2) Modified the file '/gcc/config.gcc'
> > to include the above 2 files in 'tmake_file'
> >
> > But still the soft-fp routines are not getting linked. The default
> > libraries are being taken.
> >
> > Please suggest the additional modifications required to support
> > the soft-fp support. Also, please let me know the name of
> > library built for soft-fp?
>
> Take a look at libgcc/config.host, notably the addition of t-softfp to
> tmake_file. That refers to libgcc/config/t-softfp. I don't know if
> that is all that you need, but hopefully it will move you one step
> forward.
>
> Ian
