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glibc/include
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Joseph Myers b1c347e2cd Move fenv.h override inline functions to generic math_private.h. 
The tile version of math_private.h defines some inline functions for
fenv.h functions, to optimize away internal calls to these functions
that do nothing given no support for floating-point exceptions and
rounding modes.  (Some functions may have error cases for invalid
arguments, but those aren't applicable to the internal calls from
within glibc.)  Other configurations lacking support for exceptions
and rounding modes lack such inline functions.  This patch moves them
to the generic math_private.h, appropriately conditioned, so that all
such configurations can benefit from the.

include/fenv.h is made to check whether there are any non-default
rounding modes; that needs to be done there, rather than later,
because get-rounding-mode.h defines values for otherwise unsupported
FE_* rounding modes.  It also gives an error for FE_TONEAREST
undefined, a case that already did not work for building the glibc
testsuite; the convention has by now been established that all
architectures need to provide a version of bits/fenv.h that at least
defines FE_TONEAREST.

Tested with build-many-glibcs.py.  As expected, installed stripped
shared libraries are unchanged for tile and for architectures
supporting exceptions and rounding modes, but changed for non-tile
architectures not supporting exceptions and rounding modes that
previously lacked this optimization (e.g. Nios II libm.so is about 1kB
smaller).

The optimization is not in fact complete (does not cover feholdexcept
/ __feholdexcept, so a few calls to those remain unnecessarily within
libm even after this patch), but that can be dealt with separately.

	* include/fenv.h [!_ISOMAC && !FE_TONEAREST]: Give #error.
	[!_ISOMAC] (FE_HAVE_ROUNDING_MODES): New macro.
	* sysdeps/generic/math_private.h
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (fegetenv): New
	inline function.
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (__fegetenv):
	Likewise.
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (fesetenv):
	Likewise.
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (__fesetenv):
	Likewise.
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (feupdateenv):
	Likewise.
	[!FE_HAVE_ROUNDING_MODES && FE_ALL_EXCEPT == 0] (__feupdateenv):
	Likewise.
	[!FE_HAVE_ROUNDING_MODES] (fegetround): Likewise.
	[!FE_HAVE_ROUNDING_MODES] (__fegetround): Likewise.
	[!FE_HAVE_ROUNDING_MODES] (fesetround): Likewise.
	[!FE_HAVE_ROUNDING_MODES] (__fesetround): Likewise.
	* sysdeps/tile/math_private.h (fegetenv): Remove inline function.
	(__fegetenv): Likewise.
	(fesetenv): Likewise.
	(__fesetenv): Likewise.
	(feupdateenv): Likewise.
	(__feupdateenv): Likewise.
	(fegetround): Likewise.
	(__fegetround): Likewise.
	(fesetround): Likewise.
	(__fesetround): Likewise.
2018-02-01 20:54:44 +00:00
..
arpa nss_dns: Replace local declarations with declarations from a header file 2017-04-04 20:56:23 +02:00
bits Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
gnu Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
net Fix resolver if_* namespace (bug 17717). 2014-12-16 18:18:49 +00:00
netinet Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
programs Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
protocols (abmon): Remove spaces. 1998-11-12 18:03:43 +00:00
rpc Mark internal rpc functions with attribute_hidden [BZ #18822] 2017-10-01 15:55:15 -07:00
rpcsvc libnsl: Turn remaining symbols into compat symbols [BZ #22701] 2018-01-29 17:42:30 +01:00
sys Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
aio.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
aliases.h Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822] 2017-10-01 15:21:00 -07:00
alloc_buffer.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
alloca.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
argp-fmtstream.h Mark internal argp functions with attribute_hidden [BZ #18822] 2017-10-01 15:10:27 -07:00
argp.h Mark internal argp functions with attribute_hidden [BZ #18822] 2017-10-01 15:10:27 -07:00
argz.h Mark internal argz functions with attribute_hidden [BZ #18822] 2017-08-18 09:31:33 -07:00
array_length.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
assert.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
atomic.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
byteswap.h Update. 1998-04-10 10:52:25 +00:00
caller.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
complex.h float128: Add private _Float128 declarations for libm. 2017-05-15 10:23:28 -03:00
cpio.h Add more headers to include/ for conform tests. 2014-12-11 21:41:30 +00:00
crypt.h Add include/crypt.h. 2016-10-28 22:40:16 -04:00
ctype.h Rename bits/libc-tsd.h to libc-tsd.h (bug 14912). 2015-09-03 20:33:46 +00:00
des.h Update. 1998-03-24 10:39:42 +00:00
dirent.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
dlfcn.h elf: Support dlvsym within libc.so 2018-01-04 18:46:24 +01:00
dso_handle.h Mark __dso_handle as hidden [BZ #18822] 2017-09-26 16:53:44 -07:00
elf.h Properly compute offsets of note descriptor and next note [BZ #22370] 2017-11-28 09:57:00 -08:00
endian.h Update. 2001-03-30 05:34:59 +00:00
envz.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
err.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
errno.h Remove __need macros from errno.h (__need_Emath, __need_error_t). 2017-06-14 08:14:34 -04:00
error.h Update. 1997-06-21 02:59:26 +00:00
execinfo.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
fcntl.h Consolidate remaning non cancellable definitions 2017-08-23 10:47:03 -03:00
features.h Update for 2.27 release 2018-02-01 16:17:18 +00:00
fenv.h Move fenv.h override inline functions to generic math_private.h. 2018-02-01 20:54:44 +00:00
float.h Handle more _FloatN, _FloatNx types in include/float.h. 2017-11-07 23:49:04 +00:00
fmtmsg.h Add more headers to include/ for conform tests. 2014-12-11 21:41:30 +00:00
fnmatch.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
fpu_control.h Hide internal __setfpucw function [BZ #18822] 2017-10-01 17:52:15 -07:00
ftw.h Update. 1997-06-21 02:59:26 +00:00
gconv.h Update. 1997-11-18 02:50:07 +00:00
getopt_int.h Update. 2004-03-09 10:36:53 +00:00
getopt.h getopt: remove USE_NONOPTION_FLAGS 2017-04-07 07:45:53 -04:00
glob.h Hide internal __glob64 function [BZ #18822] 2017-10-01 18:02:10 -07:00
gmp.h Mark internal gmp functions with attribute_hidden [BZ #18822] 2017-10-01 15:15:30 -07:00
gnu-versions.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
grp-merge.h NSS: Implement group merging support. 2016-04-29 22:18:21 -04:00
grp.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
gshadow.h Mark internal gshadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:19:17 -07:00
iconv.h Update. 1999-08-21 00:38:15 +00:00
idna.h Hide internal idna functions [BZ #18822] 2017-10-01 17:33:22 -07:00
ifaddrs.h hurd: Fix getifaddrs' and freeifaddrs' symbol exposition 2017-09-28 01:05:18 +02:00
ifreq.h Hide internal __ifreq function [BZ #18822] 2017-10-01 17:35:46 -07:00
ifunc-impl-list.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
inline-hashtab.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
langinfo.h Add first fixes for conformtest for POSIX2008 2012-02-26 21:32:56 -05:00
libc-diag.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
libc-internal.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
libc-pointer-arith.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
libc-symbols.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
libgen.h Update. 1997-06-21 02:59:26 +00:00
libintl.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
limits.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
link.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
list_t.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
list.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
locale.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
malloc.h Hide internal __malloc_check_init function [BZ #18822] 2017-10-01 16:00:36 -07:00
math.h Remove _Mlong_double_ etc. macros. 2017-10-30 20:58:51 +00:00
mcheck.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
memory.h Update. 1997-06-21 02:59:26 +00:00
mntent.h Hide internal __hasmntopt function [BZ #18822] 2017-10-01 17:37:42 -07:00
monetary.h Hide internal __vstrfmon_l function [BZ #18822] 2017-10-01 17:45:07 -07:00
mqueue.h Fix mq_receive, mq_send mq_timed* namespace (bug 18545). 2015-06-17 20:19:04 +00:00
netdb.h Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822] 2017-10-01 15:21:00 -07:00
netgroup.h Update. 1997-06-21 02:59:26 +00:00
nl_types.h Update. 1997-12-22 20:53:38 +00:00
nss.h nss: Export nscd hash function as __nss_hash [BZ #22459] 2017-11-23 14:08:11 +01:00
nsswitch.h Update. 1997-06-21 02:59:26 +00:00
obstack.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
plural-exp.h Hide internal __gettextparse function [BZ #18822] 2017-10-01 17:31:05 -07:00
poll.h Update. 2000-08-21 16:02:48 +00:00
printf.h Hide internal printf functions [BZ #18822/21986] 2017-08-22 07:50:57 -07:00
pthread.h Fix mq_notify pthread_barrier_* namespace (bug 18544). 2015-06-17 20:16:56 +00:00
pty.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
pwd.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
regex.h Hide internal regex functions [BZ #18822] 2017-10-01 15:53:15 -07:00
resolv.h Obsolete p_secstodate. 2017-11-22 22:21:10 +00:00
rounding-mode.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
sched.h Hide internal __sched_setparam function [BZ #18822] 2017-10-01 17:43:25 -07:00
scratch_buffer.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
search.h Hide internal __tdestroy function [BZ #18822] 2017-10-01 16:06:58 -07:00
set-hooks.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
setjmp.h Add jmp_buf-macros.h 2017-11-09 05:10:03 -08:00
sgtty.h Update. 1997-06-21 02:59:26 +00:00
shadow.h Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] 2017-10-01 15:13:13 -07:00
shlib-compat.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
signal.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
spawn.h Update. 2000-10-01 19:15:29 +00:00
stab.h Update. 1997-06-21 02:59:26 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
stap-probe.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
stdc-predef.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
stdio_ext.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
stdio.h Mark internal stdio functions with attribute_hidden [BZ #18822] 2017-10-01 15:20:13 -07:00
stdlib.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
string.h Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
strings.h Update. 1997-06-21 02:59:26 +00:00
stropts.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
stubs-prologue.h * sysdeps/generic/bits/libc-tsd.h [USE___THREAD]: Conditional 2002-10-11 10:52:20 +00:00
syscall.h Update. 1997-06-21 02:59:26 +00:00
sysexits.h Update. 1997-06-21 02:59:26 +00:00
syslog.h Update. 1997-06-21 02:59:26 +00:00
tar.h Update. 1997-06-21 02:59:26 +00:00
termios.h Hide internal __tcgetattr function [BZ #18822] 2017-10-01 17:48:24 -07:00
tgmath.h Update. 1998-09-06 23:45:24 +00:00
time.h Mark internal time functions with attribute_hidden [BZ #18822] 2017-10-01 15:17:32 -07:00
ttyent.h Installed header hygiene (BZ#20366): Test of installed headers. 2016-09-23 08:43:56 -04:00
uchar.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
ucontext.h Update. 1999-10-12 18:17:41 +00:00
ulimit.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
unistd.h hurd: Implement faccessat without AT_EACCESS flag 2018-01-10 02:03:28 +01:00
utime.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00
utmp.h Mark internal utmp functions with attribute_hidden [BZ #18822] 2017-10-01 15:51:56 -07:00
values.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
wchar.h Remove attribute_hidden for wchar ifunc symbols. 2017-11-21 08:43:23 +01:00
wctype.h Remove __need macros from stdio.h and wchar.h. 2017-06-08 13:58:17 -04:00
wordexp.h First steps to get conformtest fully working 2012-02-25 23:18:39 -05:00