glibc/bits
Joseph Myers a23aa5b727 Add _Float64x function aliases.
This patch continues filling out TS 18661-3 support by adding *f64x
function aliases on platforms with _Float64x support.  (It so happens
the set of such platforms is exactly the same as the set of platforms
with _Float128 support, although on x86_64, x86 and ia32 the _Float64x
format is Intel extended rather than binary128.)  The API provided
corresponds exactly to that provided for _Float128, mostly coming from
TS 18661-3.  As these functions always alias those for another type
(long double, _Float128 or both), __* function names are not provided,
as in other cases of alias types.

Given the preparation done in previous patches, this one just enables
the feature via Makeconfig and bits/floatn.h, adds symbol versions,
and updates documentation and ABI baselines.  The symbol versions are
present unconditionally as GLIBC_2.27 in the relevant Versions files,
as it's OK for those to specify versions for functions that may not be
present in some configurations; no additional complexity is needed
unless in future some configuration gains support for this type that
didn't have such support in 2.27.  The Makeconfig additions for ia64
and x86 aren't strictly needed, as those configurations also get
float64x-alias-fcts definitions from
sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given
that _Float64x is not _Float128 for those configurations.

A libm-test-ulps update for x86 is included.  This is because
bits/mathinline.h does not have _Float64x support added and for two
functions the use of out-of-line functions results in increased ulps
(ifloat64x shares ulps with ildouble / ifloat128 as appropriate).
Given that we'd like generally to eliminate bits/mathinline.h
optimizations, preferring to have such optimizations in GCC instead,
it seems reasonable not to add such support there for new types.  GCC
support for _FloatN / _FloatNx built-in functions is limited, but has
been improved in GCC 8, and at some point I hope the full set of libm
built-in functions in GCC, and other optimizations with
per-floating-type aspects, will be enabled for all _FloatN / _FloatNx
types.

Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.

	* sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable.
	* sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts):
	Likewise.
	* sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts):
	Likewise.
	* sysdeps/x86/Makeconfig: New file.
	* bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* bits/floatn.h (__HAVE_FLOAT64X): New macro.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X):
	Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* manual/math.texi (Mathematics): Document support for _Float64x.
	* math/Versions (GLIBC_2.27): Add _Float64x functions.
	* stdlib/Versions (GLIBC_2.27): Likewise.
	* wcsmbs/Versions (GLIBC_2.27): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
2017-11-27 14:16:47 +00:00
..
types Fix sigval namespace (bug 21944). 2017-08-16 20:33:59 +00:00
byteswap-16.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
byteswap.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
confname.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dirent.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dlfcn.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
elfclass.h Update. 1999-07-27 05:53:25 +00:00
endian.h
environments.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
errno.h Remove __need macros from errno.h (__need_Emath, __need_error_t). 2017-06-14 08:14:34 -04:00
fcntl.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fenv.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fenvinline.h Update. 1999-11-11 01:05:26 +00:00
floatn-common.h Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
floatn.h Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
flt-eval-method.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fp-fast.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fp-logb.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hwcap.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
in.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioctl-types.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioctls.h
ipc.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ipctypes.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iscanonical.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-header-start.h Add support for testing __STDC_WANT_IEC_60559_TYPES_EXT__ 2017-05-09 11:40:28 -03:00
libm-simd-decl-stubs.h Handle more _FloatN, _FloatNx types in bits/libm-simd-decl-stubs.h. 2017-11-24 21:11:37 +00:00
link.h * csu/elf-init.c (__libc_csu_fini): Don't do anything here. 2005-01-06 22:40:27 +00:00
local_lim.h
long-double.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
math-vector.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mathdef.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mathinline.h * configure.in (libc_cv_gnu89_inline): Test for -fgnu89-inline. 2007-03-17 17:04:28 +00:00
mman.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mqueue.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
msq.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
netdb.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
param.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
poll.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
posix_opt.h
pthreadtypes.h 2002-11-10 Roland McGrath <roland@redhat.com> 2002-11-10 23:22:35 +00:00
resource.h Define struct rusage in sys/wait.h when required (bug 21575). 2017-06-19 11:59:19 +00:00
sched.h Remove __need_schedparam and __cpu_set_t_defined. 2017-06-12 17:11:36 -04:00
select.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sem.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setjmp.h
shm.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigaction.h Fix XPG4.2 bits/sigaction.h namespace (bug 21899). 2017-08-07 23:41:32 +00:00
sigcontext.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigevent-consts.h Remove __need macros from signal.h. 2017-05-20 19:04:43 -04:00
siginfo-consts.h Remove __need macros from signal.h. 2017-05-20 19:04:43 -04:00
signum-generic.h Factor out shared definitions from bits/signum.h. 2017-06-20 20:32:50 -04:00
signum.h Factor out shared definitions from bits/signum.h. 2017-06-20 20:32:50 -04:00
sigstack.h Split up bits/sigstack.h. 2017-05-19 20:35:07 +00:00
sigthread.h Refer to <signal.h> instead of <pthread.h> in <bits/sigthread.h> 2017-02-28 10:34:15 +01:00
sockaddr.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
socket.h hurd: Fix bits/socket.h conformity 2017-09-24 22:21:41 +02:00
ss_flags.h Split up bits/sigstack.h. 2017-05-19 20:35:07 +00:00
stat.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
statfs.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
statvfs.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdint-intn.h Fix network headers stdint.h namespace (bug 21455). 2017-05-04 20:36:42 +00:00
stdint-uintn.h Fix network headers stdint.h namespace (bug 21455). 2017-05-04 20:36:42 +00:00
stdlib-bsearch.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stropts.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sys_errlist.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
syslog-path.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sysmacros.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
termios.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
time.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
typesizes.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
uintn-identity.h Make endian-conversion macros always return correct types (bug 16458). 2017-01-11 15:28:08 +00:00
uio_lim.h Remove __need_IOV_MAX and __need_FOPEN_MAX. 2017-06-14 07:51:30 -04:00
uio-ext.h posix: Add p{readv,writev}2 flags to generic uio-ext.h 2017-10-17 17:52:04 -02:00
ustat.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
utmp.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
utsname.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
waitflags.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
waitstatus.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wchar.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wordsize.h Define wordsize.h macros everywhere 2016-11-04 09:37:44 -07:00
xtitypes.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00