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Joseph Myers b3f27d8150 Add narrowing fma functions
This patch adds the narrowing fused multiply-add functions from TS
18661-1 / TS 18661-3 / C2X to glibc's libm: ffma, ffmal, dfmal,
f32fmaf64, f32fmaf32x, f32xfmaf64 for all configurations; f32fmaf64x,
f32fmaf128, f64fmaf64x, f64fmaf128, f32xfmaf64x, f32xfmaf128,
f64xfmaf128 for configurations with _Float64x and _Float128;
__f32fmaieee128 and __f64fmaieee128 aliases in the powerpc64le case
(for calls to ffmal and dfmal when long double is IEEE binary128).
Corresponding tgmath.h macro support is also added.

The changes are mostly similar to those for the other narrowing
functions previously added, especially that for sqrt, so the
description of those generally applies to this patch as well.  As with
sqrt, I reused the same test inputs in auto-libm-test-in as for
non-narrowing fma rather than adding extra or separate inputs for
narrowing fma.  The tests in libm-test-narrow-fma.inc also follow
those for non-narrowing fma.

The non-narrowing fma has a known bug (bug 6801) that it does not set
errno on errors (overflow, underflow, Inf * 0, Inf - Inf).  Rather
than fixing this or having narrowing fma check for errors when
non-narrowing does not (complicating the cases when narrowing fma can
otherwise be an alias for a non-narrowing function), this patch does
not attempt to check for errors from narrowing fma and set errno; the
CHECK_NARROW_FMA macro is still present, but as a placeholder that
does nothing, and this missing errno setting is considered to be
covered by the existing bug rather than needing a separate open bug.
missing-errno annotations are duly added to many of the
auto-libm-test-in test inputs for fma.

This completes adding all the new functions from TS 18661-1 to glibc,
so will be followed by corresponding stdc-predef.h changes to define
__STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__, as the support
for TS 18661-1 will be at a similar level to that for C standard
floating-point facilities up to C11 (pragmas not implemented, but
library functions done).  (There are still further changes to be done
to implement changes to the types of fromfp functions from N2548.)

Tested as followed: natively with the full glibc testsuite for x86_64
(GCC 11, 7, 6) and x86 (GCC 11); with build-many-glibcs.py with GCC
11, 7 and 6; cross testing of math/ tests for powerpc64le, powerpc32
hard float, mips64 (all three ABIs, both hard and soft float).  The
different GCC versions are to cover the different cases in tgmath.h
and tgmath.h tests properly (GCC 6 has _Float* only as typedefs in
glibc headers, GCC 7 has proper _Float* support, GCC 8 adds
__builtin_tgmath).
2021-09-22 21:25:31 +00:00
argp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
assert Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
benchtests benchtests: Fix validate_benchout.py exceptions 2021-09-16 09:19:55 +05:30
bits Update floating-point feature test macro handling for C2X 2021-06-01 14:22:06 +00:00
catgets Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ChangeLog.old Update ChangeLog.old/ChangeLog.23. 2021-08-01 21:33:43 -04:00
conform Use $(pie-default) with conformtest 2021-09-17 19:24:14 +00:00
crypt Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
csu Extend struct r_debug to support multiple namespaces [BZ #15971] 2021-09-19 13:51:35 -07:00
ctype Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
debug Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dirent Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dlfcn Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
elf ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340] 2021-09-22 11:12:43 -07:00
gmon Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
gnulib Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
grp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
gshadow Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
hesiod Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
htl htl: Move thread table to ld.so 2021-09-16 01:04:05 +02:00
hurd Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
iconv iconvconfig: Fix behaviour with --prefix [BZ #28199] 2021-09-13 20:48:35 +05:30
iconvdata Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
include ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340] 2021-09-22 11:12:43 -07:00
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io Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
libio Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
locale locale: Add missing second argument to _Static_assert in C-collate-seq.c 2021-09-06 19:43:37 +02:00
localedata Add generic C.UTF-8 locale (Bug 17318) 2021-09-06 11:30:28 -04:00
login Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mach Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
malloc Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
manual Add narrowing fma functions 2021-09-22 21:25:31 +00:00
math Add narrowing fma functions 2021-09-22 21:25:31 +00:00
mathvec Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
misc regex: copy back from Gnulib 2021-09-21 08:00:44 -07:00
nis Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
nptl nptl: pthread_kill needs to return ESRCH for old programs (bug 19193) 2021-09-20 14:56:08 +02:00
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nss Fix failing nss/tst-nss-files-hosts-long with local resolver 2021-09-07 21:41:38 +02:00
po po/nl.po: Update Dutch translation. 2021-08-01 20:52:28 -04:00
posix regex: copy back from Gnulib 2021-09-21 08:00:44 -07:00
pwd Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
resolv Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
resource y2038: Add support for 64-bit time on legacy ABIs 2021-06-15 10:42:11 -03:00
rt Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
scripts Fix build-many-glibcs.py --strip for installed library renaming 2021-09-16 14:08:05 +00:00
setjmp nptl: Move __pthread_unwind_next into libc 2021-04-21 19:49:50 +02:00
shadow Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
signal Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
socket socket: Add time64 alias for setsockopt 2021-07-22 19:16:26 +02:00
soft-fp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
stdio-common Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
stdlib Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
string Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
sunrpc Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
support time: Fix compile error in itimer test affecting hurd 2021-09-16 05:21:08 +09:00
sysdeps Add narrowing fma functions 2021-09-22 21:25:31 +00:00
sysvipc Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
termios Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
time time: Fix compile error in itimer test affecting hurd 2021-09-16 05:21:08 +09:00
timezone Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
wcsmbs Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
wctype Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
.gitattributes Assume __NR_openat is always defined 2016-03-23 23:35:08 +01:00
.gitignore Add *.pyc to .gitignore 2015-05-18 15:26:26 +05:30
abi-tags Remove the bulk of the NaCl port. 2017-05-20 08:09:10 -04:00
aclocal.m4 configure: Replaced obsolete AC_TRY_COMPILE 2021-06-04 10:16:00 -03:00
config.h.in x86-64: Remove assembler AVX512DQ check 2021-08-24 07:05:35 -07:00
config.make.in Add pthread-in-libc, libpthread-routines-var, librt-routines-var 2021-05-03 08:13:32 +02:00
configure configure: Fix check for INSERT in linker script 2021-09-13 12:39:20 -07:00
configure.ac configure: Fix check for INSERT in linker script 2021-09-13 12:39:20 -07:00
CONTRIBUTED-BY Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
COPYING Update to latest versions of GPL-2.0 and LGPL-2.1 2013-09-09 12:52:48 +10:00
COPYING.LIB Update to latest versions of GPL-2.0 and LGPL-2.1 2013-09-09 12:52:48 +10:00
extra-lib.mk Rename cppflags-iterator.mk to libof-iterator.mk, remove extra-modules.mk. 2017-05-09 07:06:29 -04:00
gen-locales.mk Improve gen-locales.mk and gen-locale.sh to make test files with @ options work 2018-02-27 17:01:57 +01:00
INSTALL Update install.texi, and regenerate INSTALL. 2021-08-01 16:48:43 -04:00
libc-abis riscv: support GNU indirect function 2021-01-10 21:25:13 -05:00
libof-iterator.mk Rename cppflags-iterator.mk to libof-iterator.mk, remove extra-modules.mk. 2017-05-09 07:06:29 -04:00
LICENSES Prefer https to http for gnu.org and fsf.org URLs 2019-09-07 02:43:31 -07:00
MAINTAINERS Add MAINTAINERS 2017-05-11 13:38:30 -04:00
Makeconfig Run conform/ tests using newly built libc 2021-09-17 13:12:10 +00:00
Makefile testrun.sh: Add support for --tool=rpctrace 2021-09-10 01:24:10 +02:00
Makefile.help Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Makefile.in New make target to only build benchmark binaries 2016-04-20 10:23:28 +05:30
Makerules Install shared objects under their ABI names 2021-06-28 08:33:57 +02:00
NEWS Add narrowing fma functions 2021-09-22 21:25:31 +00:00
o-iterator.mk Fri Mar 17 12:58:37 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> 1995-03-17 18:42:51 +00:00
README Documentation for the RISC-V 32-bit port 2020-08-27 08:17:44 -07:00
Rules Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
SHARED-FILES Mention today's regex merge in SHARED-FILES 2021-09-21 18:00:10 -07:00
shlib-versions Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
test-skeleton.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
version.h Open master branch for glibc 2.35 development 2021-08-01 21:54:40 -04:00

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