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Joseph Myers f778723496 Use long double not double for _Float64 with old GCC if values the same. 
If double, long double and _Float64 all have the same set of values,
TS 18661-3 requires the usual arithmetic conversions on long double
and _Float64 to produce _Float64.  For this to be the case when
building with a compiler without a distinct _Float64 type, _Float64
must be a typedef for long double, not for double.  (_Float32x,
however, must be double in such a case, not long double, because the
usual arithmetic conversions on _Float32x and double must produce
double.)

This patch adjusts the fallback definition of _Float64 and associated
macros accordingly in that case, to fix the build of test-tgmath3 with
GCC 6 for such a configuration.  Tested in conjunction with _Float64
changes with build-many-glibcs.py for arm-linux-gnueabi, to make sure
the issue with test-tgmath3 is fixed.  Also tested for x86_64.

	* bits/floatn-common.h: Include <bits/long-double.h>.
	[__HAVE_FLOAT64 && (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
	&& __NO_LONG_DOUBLE_MATH] (__f64): Use suffix 'l'.
	[__HAVE_FLOAT64 && (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
	&& __NO_LONG_DOUBLE_MATH] (__CFLOAT64): Use _Complex long double.
	[__HAVE_FLOAT64 && (!__GNUC_PREREQ (7, 0) || defined __cplusplus)
	&& __NO_LONG_DOUBLE_MATH] (_Float64): Use long double.
	[__HAVE_FLOAT64 && !__GNUC_PREREQ (7, 0) && __NO_LONG_DOUBLE_MATH]
	(__builtin_huge_valf64): Use __builtin_huge_vall.
	[__HAVE_FLOAT64 && !__GNUC_PREREQ (7, 0) && __NO_LONG_DOUBLE_MATH]
	(__builtin_inff64): Use __builtin_infl.
	[__HAVE_FLOAT64 && !__GNUC_PREREQ (7, 0) && __NO_LONG_DOUBLE_MATH]
	(__builtin_nanf64): Use __builtin_nanl.
	[__HAVE_FLOAT64 && !__GNUC_PREREQ (7, 0) && __NO_LONG_DOUBLE_MATH]
	(__builtin_nansf64): Use __builtin_nansl.
 		2017-12-05 21:52:15 +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 Update. 1997-11-26 04:23:08 +00:00
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 Use long double not double for _Float64 with old GCC if values the same. 2017-12-05 21:52:15 +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 Update. 1997-11-26 04:23:08 +00:00
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 Update. 1997-10-15 05:34:02 +00:00
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 Update. 1997-10-15 05:34:02 +00:00
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 Update. 1997-11-26 04:23:08 +00:00
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-ext.h posix: Add p{readv,writev}2 flags to generic uio-ext.h 2017-10-17 17:52:04 -02:00
uio_lim.h Remove __need_IOV_MAX and __need_FOPEN_MAX. 2017-06-14 07:51:30 -04:00
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