kmx git

float-h: work around GCC bug 120993

Also, fix a too-low LDBL_MAX on this platform, a problem that
contributed to LDBL_NORM_MAX test failures with C23 PowerPC GCC
with ibmlongdouble.
* lib/float.c (gl_LDBL_MAX): On PowerPC with ibmlongdouble, the
correct value is 2**1024 - 2**918, not 2**1024 - 2**971.  Also,
use C99 hex double notation for the divisor, as it’s clearer and
should work nowadays.
* lib/float.in.h: Simplify by not worring whether it’s AIX or
GNU/Linux when redefining LDBL_* macros on PowerPC GCC with
ibmlongdouble, as the problem seems to be universal then.
(LDBL_NORM_MAX): On PowerPC GCC with ibmlongdouble, define to be
LDBL_MAX, so that it’s 2**1024 - 2**918, doubling GCC’s value
if supplied.
* modules/float-h-tests (Depends-on): Remove floorl, ldexpl.
Add truncl.
(test_float_h_LDADD): Likewise for libraries.
* tests/test-float-h.c (test_isfinitel): New static function,
so that we need not rely on isfinitel.
(normalize_long_double): Work even if X is negative or not finite.
Do not rely on frexpl or ldexpl.  Use truncl instead of floorl
so that the negative results are consistent with positive.
Defend against fritzy PowerPC long double arithmetic.
kc3-lang/gnulib/modules/float-h-tests

Commit

modules/float-h-tests
