On Mon, 4 Oct 2021, Segher Boessenkool wrote:
> Some current Power GCC targets support neither. Some support only
> double-double. Making IEEE QP float work on those (that is, those that
> are < power8) will require some work still: it should use libquadmath or
> similar, but that needs to be pu
Hi!
On Mon, Oct 04, 2021 at 04:14:10PM +0200, Jakub Jelinek wrote:
> Based on some IRC discussion, yet another option would be bump libgfortran
> SONAME (on all arches), make real(kind=16) on powerpc64le-linux mean
> always IEEE quad (starting with GCC 12) and if wanted add support for
> real(kind
On Mon, 4 Oct 2021, Jakub Jelinek via Gcc wrote:
> One problem with that is that I think IEEE quad long double support relies
> on glibc 2.32 or later, so not sure what exactly would be done if gcc is
> built against older glibc when it needs to call libm routines. Perhaps
> convert to __ibm128,
On Mon, Oct 04, 2021 at 12:07:54PM +0200, Jakub Jelinek via Gcc wrote:
> Or the last option would be to try to make libgfortran.so.5 ABI compatible
> with both choices on powerpc64le-linux. From quick skimming of libgfortran,
> we have lots of generated functions, which use HAVE_GFC_REAL_16 and
>
On Mon, Oct 04, 2021 at 01:36:56PM +0200, Jakub Jelinek via Gcc wrote:
> On Mon, Oct 04, 2021 at 01:24:05PM +0200, Richard Biener wrote:
> > > Your thoughts on this?
> >
> > How does glibc deal with this? There's a load of long double ABI in there.
>
> I don't know, CCing Florian; all I can see
On Mon, Oct 04, 2021 at 01:24:05PM +0200, Richard Biener wrote:
> > Your thoughts on this?
>
> How does glibc deal with this? There's a load of long double ABI in there.
I don't know, CCing Florian; all I can see is that starting with glibc 2.26
in addition to sin{f,,l} there is also sinf128, bu
On Mon, Oct 4, 2021 at 12:08 PM Jakub Jelinek via Fortran
wrote:
>
> Hi!
>
> On powerpc64le-linux target, one can select between two incompatible
> long double formats (both of them are 16-byte), __ibm128 which is
> a sum of two doubles, and __float128 (note, not implemented through
> libquadmath)
Hi!
On powerpc64le-linux target, one can select between two incompatible
long double formats (both of them are 16-byte), __ibm128 which is
a sum of two doubles, and __float128 (note, not implemented through
libquadmath), which is IEEE754 quad format. The default for
long double can be selected wi
