Re: [RFC] Optimize swab operations on mips_r2 cpu

["Kevin D. Kissell" <kevink@mips.com>]

Franck wrote:
> Hi Ralf
>
> 2006/1/25, Ralf Baechle <ralf@linux-mips.org>:
> > On Wed, Jan 25, 2006 at 10:36:46AM +0100, Franck wrote:
> >
> > > Here is a little patch to optimize swab operations by using "wsbh"
> > > instruction available on mips revision 2 cpus. I do not know what
> > > condition I should use to compile this only for mips r2 cpu though.
> > >
> > > Comments ?
> > Looks good aside of the one issue you've already raised yourself:
> >
> > > +/* FIXME: MIPS_R2 only */
> I was actually asking for advices :)
>
> I can see only two simple ways to do that:
> (a) we can define a couple of new macro ie CONFIG_MIPS32_ISET_R[12]
> that can be set depending on the selected CPU;
> (b) define a new macro CONFIG_CPU_HAS_WSBH;
Don't we already have CONFIG_CPU_MIPS32R2?