On Wed, Oct 06, 2021 at 05:41:07PM +0200, Jakub Jelinek wrote: > On Wed, Oct 06, 2021 at 10:17:44AM -0500, Segher Boessenkool wrote: > > On Wed, Oct 06, 2021 at 08:59:53AM +0200, Thomas Koenig wrote: > > > >That means flipping the default on all PowerPC to no longer be double- > > > >double. This means that you should have IEEE QP work everywhere, or the > > > >people who do need more than double precision will have no recourse. > > > > > > I think we can exclude big-endian POWER from this - they do not have > > > IEEE QP support, correct? So, exclude that from the SONAME change. > > > > Not correct, no. IEEE QP works fine in either endianness. > > But only for Power8 or later, no? I guess the reason why le can switch > moreless easily (well, far from it, it is terribly hard anyway) is that > power8 is the oldest supported ISA for le, while be can't really assume > power8 or later.
Yes. We can emulate it everywhere (using libquadmath for example). This can magically make -msoft-float work as well everywhere, btw. > Also, seems e.g. glibc support is there only for ppc64le and not be: > find . -name libm.abilist | xargs grep sinieee128 > ./sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist:GLIBC_2.32 > __asinieee128 F > ./sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist:GLIBC_2.32 > __casinieee128 F > ./sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist:GLIBC_2.32 > __csinieee128 F > ./sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist:GLIBC_2.32 > __sinieee128 F I don't know what the glibc situation is. The libraries will naturally not invest their energy in making anything work if the compiler neglects it :-( Segher
