On 03.12.21 10:28, Jakub Jelinek wrote:
On Fri, Dec 03, 2021 at 08:29:53AM +0100, Thomas Koenig wrote:
On 01.12.21 21:54, Jakub Jelinek via Fortran wrote:
Inside of libgfortran, I think it should depend on some macro defined
in libgfortran.h.
#if defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ \
&& defined __GLIBC_PREREQ && __GLIBC_PREREQ (2, 32)
then
#define MATHFUNC(funcname) __ ## funcname ## ieee128
(i.e. use the functions that will be used when one uses e.g.
sinl in C when compiled with -mabi=ieeelongdouble), but I'm not sure
if those need to be declared by libgfortran or math.h declares them).
Otherwise (when libgfortran is compiled against glibc older than 2.32)
it should use
#define MATHFUNC(funcname) funcname ## q
i.e. use the libquadmath APIs).
The current Ubuntu does not have these functions:
ubuntu@gcc-fortran:/lib/powerpc64le-linux-gnu$ nm libm.a 2>/dev/null | grep
ieee128
ubuntu@gcc-fortran:/lib/powerpc64le-linux-gnu$
Will they be supplied in the future, or with the advanced toolchain?
It is part of upstream glibc 2.32 (released Aug 2020) and later, see
https://sourceware.org/git/?p=glibc.git;a=commit;h=051be01f6b41a1466b07ae4bd7f5894a8ec5fe67
distrowatch says that glibc 2.32 and later is in Ubuntu 21.04 and later.
Jakub
So it is not possible to test on the current machine set up for this,
which has ubuntu 20.04. This makes development rather pointless at
the moment :-(
So, what should the path forward be?
