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Re: ia64 XFmode patch rides again (need ia64-linux testing)
On Tue, Oct 28, 2003 at 02:01:02AM +0100, Jan Hubicka wrote:
> > On Mon, Oct 27, 2003 at 04:42:06PM -0800, Zack Weinberg wrote:
> > > I have no preference at present. You can look in
> > > ia64.c:ia64_hpux_init_libfuncs (IIRC) for the HP-UX names. Note that
> > > GCC's floating point emulation library does not support IEEE quad, so
> > > the question is moot until that gets resolved. (Or does x86-64
> > > support this in hardware?)
> >
> > soft-fp in glibc does support it.
>
> What is the name nangling of soft-fp? Does it match the gcc one (*tf
> functions we can't use) or does it use something new? (then it would
> make more sense to match soft-fp instead of HP-UX I guess)
Whatever you choose.
soft-fp is primarily lots of macros you can use.
E.g. on sparc64 in libc/sysdeps/sparc/sparc64/soft-fp/ soft-fp is used
to implement functions as defined by sparcv9 ABI (_Qp_* which use pointers
to long double instead of long double arguments and return values).
When/if sparc32 adds long double suport (I did a patch a year ago or when,
but did not have time for it since then) in libm, it should follow
the ABI with _Q_* functions. libc/soft-fp/ directory has __addtf3 style
routines in it, so those could be included directly. Or you can come with
something else.
Jakub