ldbl-128ibm-compat: Provide nexttoward functions
commitd96723744332c22a4202a0505a3814cd950bc05d
authorGabriel F. T. Gomes <gabriel@inconstante.eti.br>
Tue, 5 Jun 2018 19:54:40 +0000 (5 16:54 -0300)
committerPaul E. Murphy <murphyp@linux.vnet.ibm.com>
Fri, 28 Feb 2020 14:20:02 +0000 (28 08:20 -0600)
tree528042fe6d9e2dbf7a280b201cb051dad8c2f855
parentf1a166b0d7af9aa0f4021f67ed8ed496ee2c8b84
ldbl-128ibm-compat: Provide nexttoward functions

The functions in the nexttoward family are special, in the sense that
they always have a long double argument, regardless of their suffix
(i.e.: nexttowardf and nexttoward have a long double argument, besides
the float and double arguments).

On top of that, they are also special because nexttoward functions are
not part of the _FloatN API, hence __nexttowardf128 do not exist.

This patch adds 4 new function implementations for the new long double
format:

  __nexttoward_to_ieee128
  __nexttowardf_to_ieee128
  __nexttowardieee128 (as an alias to __nextafterieee128)

Likewise, rename "long double" "_Float128" in shared ldbl-128
files to ensure correct type is used irrespective of ABI
switches.

Thank you to those who helped out with this patch:

Co-Authored-By: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
sysdeps/ieee754/ldbl-128/s_nexttoward.c
sysdeps/ieee754/ldbl-128/s_nexttowardf.c
sysdeps/ieee754/ldbl-128ibm-compat/Versions
sysdeps/ieee754/ldbl-128ibm-compat/s_nextafterf128.c [new file with mode: 0644]
sysdeps/ieee754/ldbl-128ibm-compat/s_nexttowardf128.c [new file with mode: 0644]