Commit Graph

819 Commits

Author SHA1 Message Date
Andreas Schwab
5bb43a4319 Make __ffs hidden 2013-09-20 21:25:31 +02:00
Joseph Myers
b92a20b560 conformtest: Fix namespace testing. 2013-09-04 20:47:21 +00:00
Joseph Myers
3f2e46a494 Remove --disable-versioning. 2013-09-04 15:25:42 +00:00
Roland McGrath
7f9d003410 Clean up h_errno declaration to use __thread unconditionally. 2013-08-27 11:09:33 -07:00
Roland McGrath
fb431262c1 Clean up _res declaration to use __thread unconditionally. 2013-08-27 11:04:46 -07:00
David S. Miller
eefa3be8e4 Update version.h and include/features.h for 2.18 release. 2013-08-10 15:52:55 -07:00
Mike Frysinger
d605071ebf libc-internal.h: add ALIGN helper macros
Rather than open coding the masks, add helper macros to do the magic.
This makes code easier to read.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-06-24 20:25:15 -04:00
Adhemerval Zanella
85c2e6110c Fix loop construction to functions calls
Check wheter the compiler has the option -fno-tree-loop-distribute-patterns
to inhibit loop transformation to library calls and uses it on memset
and memmove default implementation to avoid recursive calls.
2013-06-20 19:42:05 -05:00
Siddhesh Poyarekar
2506109403 Set/restore rounding mode only when needed
The most common use case of math functions is with default rounding
mode, i.e. rounding to nearest.  Setting and restoring rounding mode
is an unnecessary overhead for this, so I've added support for a
context, which does the set/restore only if the FP status needs a
change.  The code is written such that only x86 uses these.  Other
architectures should be unaffected by it, but would definitely benefit
if the set/restore has as much overhead relative to the rest of the
code, as the x86 bits do.

Here's a summary of the performance improvement due to these
improvements; I've only mentioned functions that use the set/restore
and have benchmark inputs for x86_64:

Before:

cos(): ITERS:4.69335e+08: TOTAL:28884.6Mcy, MAX:4080.28cy, MIN:57.562cy, 16248.6 calls/Mcy
exp(): ITERS:4.47604e+08: TOTAL:28796.2Mcy, MAX:207.721cy, MIN:62.385cy, 15543.9 calls/Mcy
pow(): ITERS:1.63485e+08: TOTAL:28879.9Mcy, MAX:362.255cy, MIN:172.469cy, 5660.86 calls/Mcy
sin(): ITERS:3.89578e+08: TOTAL:28900Mcy, MAX:704.859cy, MIN:47.583cy, 13480.2 calls/Mcy
tan(): ITERS:7.0971e+07: TOTAL:28902.2Mcy, MAX:1357.79cy, MIN:388.58cy, 2455.55 calls/Mcy

After:

cos(): ITERS:6.0014e+08: TOTAL:28875.9Mcy, MAX:364.283cy, MIN:45.716cy, 20783.4 calls/Mcy
exp(): ITERS:5.48578e+08: TOTAL:28764.9Mcy, MAX:191.617cy, MIN:51.011cy, 19071.1 calls/Mcy
pow(): ITERS:1.70013e+08: TOTAL:28873.6Mcy, MAX:689.522cy, MIN:163.989cy, 5888.18 calls/Mcy
sin(): ITERS:4.64079e+08: TOTAL:28891.5Mcy, MAX:6959.3cy, MIN:36.189cy, 16062.8 calls/Mcy
tan(): ITERS:7.2354e+07: TOTAL:28898.9Mcy, MAX:1295.57cy, MIN:380.698cy, 2503.7 calls/Mcy

So the improvements are:

cos: 27.9089%
exp: 22.6919%
pow: 4.01564%
sin: 19.1585%
tan: 1.96086%

The downside of the change is that it will have an adverse performance
impact on non-default rounding modes, but I think the tradeoff is
justified.
2013-06-12 10:36:48 +05:30
Siddhesh Poyarekar
4eacded20f Fix indentation and add copyright header to time.h 2013-06-11 18:42:42 +05:30
Siddhesh Poyarekar
89fb683558 Fix symbol definitions for __clock_* functions
__clock_gettime and other __clock_* functions could result in an extra
PLT reference within libc.so if it actually gets used.  None of the
code currently uses them, which is why this probably went unnoticed.
2013-06-11 11:11:11 +05:30
Joseph Myers
2e09a79ada Avoid use of "register" as optimization hint. 2013-06-07 22:24:35 +00:00
Ondrej Bilka
350635a59a Fix leading whitespaces. 2013-06-06 20:36:07 +02:00
Ryan S. Arnold
e054f49430 Add #include <stdint.h> for uint[32|64]_t usage (except installed headers). 2013-05-16 11:32:54 -05:00
Thomas Schwinge
572676160d New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 13:51:02 +02:00
Roland McGrath
e57b0c6100 Avoid unconditional __call_tls_dtors calls in static linking. 2013-03-28 16:52:57 -07:00
Mike Frysinger
2f62b9ee0c sys/cdefs.h: export __attribute_alloc_size__
Since we want to use this in installed headers, move it to the installed
sys/cdefs.h.  This requires a slight tweaking of the name (add trailing
underscores).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-02-18 17:18:57 -05:00
Mike Frysinger
6ff444c418 unify xmalloc prototypes & friends
These prototypes are duplicated in many places.  Add a dedicated
header for holding prototypes for program-specific functions to
avoid that.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-02-18 17:16:05 -05:00
Siddhesh Poyarekar
ba384f6ed9 C++11 thread_local destructors support
This feature is specifically for the C++ compiler to offload calling
thread_local object destructors on thread program exit, to glibc.
This is to overcome the possible complication of destructors of
thread_local objects getting called after the DSO in which they're
defined is unloaded by the dynamic linker.  The DSO is marked as
'unloadable' if it has a constructed thread_local object and marked as
'unloadable' again when all the constructed thread_local objects
defined in it are destroyed.
2013-02-18 19:08:21 +05:30
Joseph Myers
70d9946a44 Remove __ptrvalue, __bounded and __unbounded. 2013-02-13 23:30:40 +00:00
Roland McGrath
cd52592332 Remove redunant "warning: " prefix from stub warnings. 2013-02-12 16:15:59 -08:00
Roland McGrath
f1d70dad53 Remove lots of inline keywords. 2013-02-07 14:44:18 -08:00
Andreas Schwab
903ae060db Don't use GLIBC_PRIVATE errno outside of libraries 2013-02-04 10:01:54 +01:00
Jan Kratochvil
542f94662e Improve link_map.l_addr comment. 2013-02-02 10:29:17 +01:00
Joseph Myers
728d7b43fc Fix cacos real-part inaccuracy for result real part near 0 (bug 15023). 2013-01-17 20:25:51 +00:00
Andreas Schwab
cfa8054fbb Hide reference to mktemp in libpthread 2013-01-16 15:57:11 +01:00
Joseph Myers
6a57d93130 Remove __GLIBC_HAVE_LONG_LONG. 2013-01-11 21:13:25 +00:00
Joseph Myers
0c07e3eaa7 Remove __USE_ANSI. 2013-01-10 02:27:25 +00:00
Joseph Myers
568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
David S. Miller
c758a68615 Update version.h and include/features.h for 2.17 release. 2012-12-24 19:02:13 -08:00
Andreas Schwab
67cbf9a2a9 [BZ #14898]
* include/link.h (FORCED_DYNAMIC_TLS_OFFSET) [NO_TLS_OFFSET == 0]:
	Change to -1.
2012-12-07 14:55:19 -07:00
Siddhesh Poyarekar
1a538b9f15 * sunrpc/rpc/svc.h (__svc_accept_failed): Move declaration...
* include/rpc/svc.h: ... here.
2012-11-30 13:53:44 -07:00
H.J. Lu
c515fb5148 Cast to __intptr_t before casting pointer to int64 2012-11-26 16:45:36 -08:00
H.J. Lu
7e1be74125 Check supported DF_1_XXX bits 2012-11-21 06:33:19 -08:00
Thomas Schwinge
123be9deda Add recvmmsg and sendmmsg to the generic glibc API. 2012-11-20 19:26:04 +01:00
Thomas Schwinge
b830319d49 [BZ #157] Remove include/stub-tag.h for good. 2012-11-04 19:59:40 +01:00
Joseph Myers
5b5b04d628 Make fma use of Dekker and Knuth algorithms use round-to-nearest (bug 14796). 2012-11-03 19:48:53 +00:00
H.J. Lu
f62c8abcfb Compile x86 rtld with -mno-sse -mno-mmx 2012-11-02 18:43:27 -07:00
Joseph Myers
a68d0680f8 conformtest: Add test data for fenv.h. 2012-11-02 23:21:36 +00:00
Joseph Myers
dcdae19a3f Test _ISOMAC in include/sys/syslog.h. 2012-11-02 15:41:37 +00:00
Roland McGrath
6e6249d0b4 BZ#14743: Move clock_* symbols from librt to libc. 2012-10-24 14:50:46 -07:00
Andreas Schwab
ca38dc17d8 Avoid PLT references from __get_clockfreq on powerpc 2012-10-12 16:54:06 +02:00
H.J. Lu
11dd4af68c Framework to test IFUNC implementations on target 2012-10-11 16:40:01 -07:00
Roland McGrath
9043e2288e Name space hygeine for madvise. 2012-10-04 16:31:43 -07:00
Joseph Myers
6c9b0f6826 Make strtod respect the rounding mode (bug 14518). 2012-09-12 23:36:19 +00:00
Mike Frysinger
493387d21f add attribute_hidden to __have_{sock_cloexec,pipe2,dup3
These internal knobs are not exposed as part of the public ABI, so mark
them hidden to avoid generating relocations against them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-08-18 01:54:12 -04:00
Mike Frysinger
a277af22ea split assume pipe2/dup3/sock_cloexec knobs
We can't assume sock_cloexec and pipe2 are bound together as the former
defines are found in glibc only while the latter are a combo of kernel
headers and glibc.  So if we do a runtime detection of SOCK_CLOEXEC, but
pipe2() is a stub inside of glibc, we hit a problem.  For example:

main()
{
	getgrnam("portage");
	if (!popen("ls", "r"))
		perror("popen()");
}

getgrnam() will detect that the kernel supports SOCK_CLOEXEC and then set
both __have_sock_cloexec and __have_pipe2 to true.  But if glibc was built
against older kernel headers where __NR_pipe2 does not exist, glibc will
have a ENOSYS stub for it.  So popen() will always fail as glibc assumes
pipe2() works.

While this isn't too much of an issue for some arches as they added the
functionality to the kernel at the same time, not all arches are that
lucky.

Since the code already has dedicated names for each feature, delete the
defines wiring these three features together and make each one a proper
dedicated knob.

We've been carrying this in Gentoo since glibc-2.9.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-08-18 00:35:47 -04:00
Roland McGrath
e66a42f57f Split sys/param.h out into common file and sysdeps bits/param.h file. 2012-08-17 09:55:17 -07:00
Roland McGrath
67cc348d55 Declare __getdirentries in internal dirent.h. 2012-08-15 10:09:18 -07:00
Maxim Kuvyrkov
51a9ba860a Add explicit acquire/release semantics to atomic_exchange_and_add. 2012-08-13 19:31:00 -07:00