GCC implemented a stricter definition for the IBM extended long double format
than defined in AIX and XLC. GCC cmptf pattern will not produce correct results
for some values generated by XLC.
--
Summary: GCC ldouble format incompatibility with XLC long double
Product: gcc
Version: 3.4.0
Status: UNCONFIRMED
Keywords: ABI
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dje at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: *-*-*
GCC host triplet: *-*-*
GCC target triplet: powerpc-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19019