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1ce8849f
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2025-07-28T17:50:30
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float-h: change IBM long double to match GCC 15
This is in response to the GCC developers;
see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120993>.
* lib/float.c (gl_LDBL_MAX): Remove the implementation for PowerPC,
as it should no longer be needed.
* lib/float.in.h (LDBL_MIN_EXP, LDBL_MIN_10_EXP, LDBL_MIN)
(LDBL_MAX, LDBL_EPSILON, LDBL_NORM_MAX): On PowerPC with IBM long
double, simplify by using the GCC 15 values unconditionally.
These are the correct values according to the GCC developers
and there seems little point to disagreeing with current GCC
about obsolescent arithmetic that is so problematic in practice.
* tests/test-float-h.c (test_long_double): Relax tests of LDBL_MAX
when !LDBL_IS_IEC_60559, as the tests would now fail on PowerPC and
they were not portable in that case anyway.
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6164b4cb
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2025-07-08T17:34:25
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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.
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3d1b90b4
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2024-12-27T23:14:08
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Rename module float to float-h.
* modules/float-h: Renamed from modules/float.
* modules/float-h-tests: Renamed from modules/float-tests.
* modules/float-h-c++-tests: Renamed from modules/float-c++-tests.
* tests/test-float-h.c: Renamed from tests/test-float.c.
* tests/test-float-h-c++.cc: Renamed from tests/test-float-c++.cc.
* tests/test-float-h-c++2.cc: Renamed from tests/test-float-c++2.cc.
* doc/posix-headers/float.texi: Update.
* modules/* (Depends-on): Update.
* modules/float: New file.
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c36a0f21
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2024-10-27T17:01:29
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doc: Add a module index.
* doc/Makefile (undocumented-modules.texi): New rule.
(%.info, %.html, %.dvi, %.pdf): Depend on undocumented-modules.texi.
(mostlyclean): Remove also *.m and *.tmp.
(force): New rule.
* doc/*.texi: Add module index entries.
* doc/*/*.texi: Likewise.
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fda40b61
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2024-08-01T00:46:49
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float: Update to mostly guarantee ISO C 23 compliance.
* doc/posix-headers/float.texi: Mention the various portability
problems.
* lib/float.in.h (FLT_HAS_SUBNORM, FLT_DECIMAL_DIG, FLT_TRUE_MIN,
DBL_HAS_SUBNORM, DBL_DECIMAL_DIG, DBL_TRUE_MIN, LDBL_HAS_SUBNORM,
LDBL_DECIMAL_DIG, LDBL_TRUE_MIN): New macros.
(gl_LDBL_TRUE_MIN): New declaration.
(FLT_IS_IEC_60559, FLT_NORM_MAX, FLT_SNAN, GNULIB_defined_FLT_SNAN,
DBL_IS_IEC_60559, DBL_NORM_MAX, DBL_SNAN, GNULIB_defined_DBL_SNAN,
LDBL_IS_IEC_60559, LDBL_NORM_MAX, LDBL_SNAN, GNULIB_defined_LDBL_SNAN):
New macros.
(gl_FLT_SNAN_t, gl_DBL_SNAN_t, gl_LDBL_SNAN_t): New types.
(gl_FLT_SNAN, gl_DBL_SNAN, gl_LDBL_SNAN): New declarations.
* lib/float.c (gl_LDBL_TRUE_MIN): New variable.
(gl_FLT_SNAN, gl_DBL_SNAN, gl_LDBL_SNAN): New variables.
* m4/float_h.m4 (gl_FLOAT_H): Add check whether float.h conforms to
ISO C23. Set REPLACE_FLOAT_SNAN.
* modules/float (configure.ac): Test also REPLACE_FLOAT_SNAN. Require
gl_BIGENDIAN.
* tests/test-float.c: Also check FLT_EVAL_METHOD, FLT_HAS_SUBNORM,
FLT_DECIMAL_DIG, FLT_IS_IEC_60559, FLT_TRUE_MIN, FLT_NORM_MAX,
DBL_HAS_SUBNORM, DBL_DECIMAL_DIG, DBL_IS_IEC_60559, DBL_TRUE_MIN,
DBL_NORM_MAX, LDBL_HAS_SUBNORM, LDBL_DECIMAL_DIG, LDBL_IS_IEC_60559.
Conditionally check LDBL_TRUE_MIN, LDBL_NORM_MAX.
Include isnanf-nolibm.h, isnand-nolibm.h, isnanl-nolibm.h.
(test_float): Check the values of FLT_HAS_SUBNORM, FLT_DECIMAL_DIG,
FLT_TRUE_MIN, FLT_IS_IEC_60559, FLT_NORM_MAX, FLT_SNAN.
(test_double): Check the values of DBL_HAS_SUBNORM, DBL_DECIMAL_DIG,
DBL_TRUE_MIN, DBL_IS_IEC_60559, DBL_NORM_MAX, DBL_SNAN.
(test_long_double): Check the values of LDBL_HAS_SUBNORM,
LDBL_DECIMAL_DIG, LDBL_TRUE_MIN, LDBL_IS_IEC_60559, LDBL_NORM_MAX,
LDBL_SNAN.
* modules/float-tests (Depends-on): Add isnanf-nolibm, isnand-nolibm,
isnanl-nolibm.
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34b38352
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2024-07-20T13:50:52
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doc: Reference POSIX:2024 instead of POSIX:2018.
* doc/*.texi: Change URL to POSIX.
* doc/posix-headers/*.texi: Likewise.
* doc/posix-functions/*.texi: Likewise.
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7941742a
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2024-04-25T22:07:37
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doc: Remove documentation of IRIX as supported platform.
* doc/posix-headers/netdb.texi: Don't mention IRIX specific workarounds.
* doc/posix-headers/pthread.texi: Likewise.
* doc/posix-headers/sys_socket.texi: Likewise.
* doc/posix-headers/wctype.texi: Likewise.
* doc/posix-functions/btowc.texi: Likewise.
* doc/posix-functions/cbrtf.texi: Likewise.
* doc/posix-functions/cbrtl.texi: Likewise.
* doc/posix-functions/copysignf.texi: Likewise.
* doc/posix-functions/exp2.texi: Likewise.
* doc/posix-functions/exp2f.texi: Likewise.
* doc/posix-functions/exp2l.texi: Likewise.
* doc/posix-functions/expm1f.texi: Likewise.
* doc/posix-functions/expm1l.texi: Likewise.
* doc/posix-functions/fabsl.texi: Likewise.
* doc/posix-functions/isnan.texi: Likewise.
* doc/posix-functions/iswblank.texi: Likewise.
* doc/posix-functions/link.texi: Likewise.
* doc/posix-functions/log10l.texi: Likewise.
* doc/posix-functions/log1pf.texi: Likewise.
* doc/posix-functions/log2.texi: Likewise.
* doc/posix-functions/log2f.texi: Likewise.
* doc/posix-functions/log2l.texi: Likewise.
* doc/posix-functions/lseek.texi: Likewise.
* doc/posix-functions/nl_langinfo.texi: Likewise.
* doc/posix-functions/pthread_sigmask.texi: Likewise.
* doc/posix-functions/remainderf.texi: Likewise.
* doc/posix-functions/remainderl.texi: Likewise.
* doc/posix-functions/rintf.texi: Likewise.
* doc/posix-functions/sigaltstack.texi: Likewise.
* doc/posix-functions/strtod.texi: Likewise.
* doc/posix-functions/strtold.texi: Likewise.
* doc/posix-functions/vscanf.texi: Likewise.
* doc/posix-functions/wctob.texi: Likewise.
* doc/**/*.texi: Update.
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9e78024b
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2019-09-22T23:23:20
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Update some URLs
This is a clerical change that mostly changes http: to https: in URLs
where either will work. It also updates some URLs that have moved,
removes some URLs that no longer work, and fixes related text.
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a4b2403a
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2019-07-06T04:35:31
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doc: Remove documentation of BeOS as a supported platform.
* doc/gnulib-intro.texi (Target Platforms): Mention that BeOS is
unsupported.
* doc/*-functions/*printf.texi: Don't mention BeOS specific workarounds.
* doc/posix-functions/getdelim.texi: Likewise.
* doc/**/*.texi: Update.
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8c66a845
|
2011-11-07T00:22:31
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Doc about floating-point and math API.
* doc/posix-headers/float.texi: Mention problem with FLT_ROUNDS.
* doc/posix-headers/math.texi: Mention problem with math_errhandling.
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fddec5c1
|
2011-09-30T21:07:43
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float, math: Fix 'int' to 'long double' conversion on Linux/SPARC64.
* m4/float_h.m4 (gl_FLOAT_H): Test conversion from 'int' to
'long double'. Set REPLACE_ITOLD.
* lib/float.in.h (_Qp_itoq, _gl_float_fix_itold): New declarations.
* lib/math.in.h (_Qp_itoq, _gl_math_fix_itold): New declarations.
* lib/itold.c: New file.
* modules/float (Files): Add lib/itold.c.
(configure.ac): When REPLACE_ITOLD is 1, arrange to compile itold.c.
(Makefile.am): Substitute REPLACE_ITOLD.
* modules/math (Depends-on): Add float.
(Makefile.am): Substitute REPLACE_ITOLD.
* doc/posix-headers/float.texi: Mention problem on Linux/SPARC64.
* doc/posix-headers/math.texi: Likewise.
* doc/posix-functions/logl.texi: Likewise.
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c65d65a8
|
2011-09-30T03:56:26
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float: Fix LDBL_MAX value on Linux/PowerPC.
* m4/float_h.m4 (gl_FLOAT_H): Set FLOAT_H and REPLACE_FLOAT_LDBL also
on Linux/PowerPC.
* lib/float.in.h (LDBL_MAX): Redefine also on Linux/PowerPC.
* lib/float.c (gl_LDBL_MAX): Also define on Linux/PowerPC.
* doc/posix-headers/float.texi: Mention Linux/PowerPC as an affected
platform.
Reported by Andreas Metzler <ametzler@downhill.at.eu.org>.
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6187bd67
|
2011-06-20T12:38:05
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float: Work around <float.h> bugs on FreeBSD/x86, AIX with GCC, IRIX.
* lib/float.in.h: Add workarounds for FreeBSD/x86, AIX with GCC, IRIX.
* lib/float.c: New file.
* m4/float_h.m4 (gl_FLOAT_H): Also handle FreeBSD, AIX, IRIX. Set
REPLACE_FLOAT_LDBL.
* modules/float (Files): Add lib/float.c.
(configure.ac): Invoke AC_LIBOBJ.
* doc/posix-headers/float.texi: Mention problems on FreeBSD, AIX, IRIX.
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b14c9a8f
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2010-10-02T18:35:08
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Update doc for POSIX:2008.
* doc/posix-headers/*.texi [except ucontext.texi, sys_timeb.texi]:
Update URL of POSIX specification.
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2ce5b03d
|
2010-09-13T14:33:22
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float: fix broken MirBSD header
* m4/float_h.m4 (gl_FLOAT_H): MirBSD copied OpenBSD's bug.
* doc/posix-headers/float.texi (float.h): Document it.
Signed-off-by: Eric Blake <eblake@redhat.com>
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80fc442c
|
2010-08-13T11:50:58
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avoid some overlong lines from posix urls, etc.
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2b6c08c7
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2008-01-20T00:09:59
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Rename two directories: headers -> posix-headers, functions -> posix-functions.
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