Re: RFA: document raw/virtual stuff

[Eli Zaretskii <eliz at delorie dot com>]

> + @item
> + The x86 architecture supports an 80-bit floating-point type.  If we're
> + running GDB on a host that doesn't support 80-bit floats, we will
> + convert those values to the largest floating-point type available on the
> + host.  Thus, the x86 80-bit floating-point type is the @dfn{raw}
> + representation, and the host's largest floating-point type is the
> + @dfn{virtual} representation.

I think this paragraph should not use @dfn.  You already used @dfn
with these terms in a previous paragraph, where you first introduced
these notions.  IMHO, @dfn should appear only once for every term.

> + @deftypefn {Target Macro} struct type *REGISTER_VIRTUAL_TYPE (int @var{reg})

Don't you want to say "struct @var{type}..."?

I also suggest to add index entries for the raw and virtual
representations.