Re: [Libunwind-devel] PowerPC64 Support finished

[David Mosberger-Tang]

On 7/24/07, Andrew Cagney <address@hidden> wrote:
> David Mosberger-Tang wrote:
> > Jose,
> >
> > On 7/12/07, Jose Flavio Aguilar Paulino <address@hidden> wrote:
> >
> >> - I have to create a new kind of registers VREGS, because PowerPC has
> >> vector registers (Special ones 128bits longs only for special
> >> instructions) and the libunwind has General Use Registers and Flating
> >> Pointer Registers. So I had to create a dummy register array in x86.
> >
> > Isn't a vector register the same size as a "long double"?  If so, do
> > you really need to add the *vregs() interface?  I think you could just
> > use the *fpregs() interface instead.
>
> This needs to work cross-platform; can you assume that a _host's_ <<long
> double>> is a 128-bit type?

Eh?  If "long double" doesn't match the host's format, you're screwed
anyhow.  That's why I'd suggest to declare fpreg_t based on
"unw_word_t" or something like that, like we do on ia64, for example.

 --david