[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
lib/48384: some libm sources are incompatible with struct ieee_ext on some archs
>Synopsis: some libm sources are incompatible with struct ieee_ext on
>Arrival-Date: Sun Nov 17 14:55:00 +0000 2013
>Originator: Martin Husemann
>Release: NetBSD 6.99.27
The NetBSD Foundation, Inc.
System: NetBSD thirdstage.duskware.de 6.99.27 NetBSD 6.99.27 (MODULAR) #62: Fri
Nov 15 12:44:00 CET 2013
As witnessed by recent (new) test failures of fmodl() on sparc64, some code
in libm does not deal properly with the ieee_ext structure definition used
on ports where long double is 128bit.
A quick glance shows the following files:
e_fmodl.c s_ceill.c s_floorl.c s_fmaxl.c s_fminl.c s_frexpl.c
s_nextafterl.c s_nexttoward.c s_nexttowardf.c s_rintl.c s_truncl.c
assume mantissa is represented as ext_frach and ext_fracl, where on at least
hppa, mips64 and sparc64 we have additionally ext_frachm and ext_fraclm.
One option for fixing may be: change the struct ieee_ext definitions, making
ext_frach based on uint64_t (merging frachm into it) and joining fraclm and
fracl into a single uint64_t ext_fracl. No idea what fallout that would
The other option, of course, is making the libm code aware of the midle
mantissa parts, #ifdef EXT_FRACLMBITS, but that might get messy.
Main Index |
Thread Index |