[PATCH v2 07/17] stdio-common: Add scanf long double data for Intel/Motorola 80-bit format

[Maciej W. Rozycki]

On Wed, 5 Mar 2025, Andreas Schwab wrote:

> >> +#undef compare_real
> >> +#define compare_real(x, y)						\
> >> +({									\
> >> +  union									\
> >> +    {									\
> >> +      type_t v;								\
> >> +      uint32_t i[3];							\
> >> +    }									\
> >> +  ux = { .v = x }, uy = { .v = y };					\
> >> +  static_assert (sizeof (ux.v) == sizeof (ux.i), "type_t size check");	\
> >> +  (ux.i[0] == uy.i[0] && ux.i[1] == uy.i[1]				\
> >> +   && (ux.i[2] & 0xffff) == (uy.i[2] & 0xffff));		 	\
> >
> > I don't think this is correct for the big-endian (m68k) case, where the 
> > sign and exponent are at the start (big end) of the first word, not the 
> > little end of the last word.
> 
> We already have ieee_long_double_shape_type, just use it.

 Done in v3, thanks for the hint.

  Maciej