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Re: [RFC PATCH, i386]: Pass FP arguments in i387 registers


"Richard Guenther" <richard.guenther@gmail.com> writes:

> On 12 Oct 2006 08:29:31 -0700, Ian Lance Taylor <iant@google.com> wrote:
> > "Uros Bizjak" <ubizjak@gmail.com> writes:
> >
> > >         * config/i386/i386.opt: New target option -m387regparm.
> >
> > I know Richard suggested an option along the lines of -mregparm, but I
> > think that as we add options of this sort it would make more sense to
> > group them into a single -mabi= option.  The existing options would
> > then be synonyms for a -mabi= option.
> 
> I don't see the advantage of this - we need to support the old switches anyway
> and it's not very likely that the list of options will grow further
> significantly.

That's what we say until we add one more.

We've already discussed the possibility of adding yet another ABI
which only uses the low-order 32 bits of the x86_64 registers.

Ian


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