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glibc/sysdeps/i386
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Joseph Myers 846d9a4a3a Fix i386 / x86_64 nearbyint exception clearing (bug 15491). 
The implementations of nearbyint functions using x87 floating point
(i386 all versions, x86_64 long double only) use the fclex
instruction, which clears any exceptions that were raised before the
function was called.  These functions must not clear exceptions that
were raised before they were called.

This patch fixes these functions to save and restore the whole
floating-point environment (fnstenv / fldenv) as the way of avoiding
raising "inexact" (recall that there isn't an x87 instruction for
loading just the status word, so the whole environment has to be saved
and loaded instead - the code already saved and loaded the control
word, which is now obtained from the saved environment after this
patch, to disable traps on "inexact").  In the case of the long double
functions, any "invalid" exception from frndint (applied to a
signaling NaN) needs merging into the saved state; this issue doesn't
apply to the float and double functions because that exception would
have been raised when the argument is loaded, before the environment
is saved.

	[BZ #15491]
	* sysdeps/i386/fpu/s_nearbyint.S (__nearbyint): Save and restore
	floating-point environment instead of clearing all exceptions.
	* sysdeps/i386/fpu/s_nearbyintf.S (__nearbyintf): Likewise.
	* sysdeps/i386/fpu/s_nearbyintl.S (__nearbyintl): Likewise,
	merging in "invalid" exceptions from frndint.
	* sysdeps/x86_64/fpu/s_nearbyintl.S (__nearbyintl): Likewise.
	* math/test-nearbyint-except.c: New file.
	* math/Makefile (tests): Add test-nearbyint-except.
2015-10-22 23:14:55 +00:00
..
fpu Fix i386 / x86_64 nearbyint exception clearing (bug 15491). 2015-10-22 23:14:55 +00:00
i586 Detect and select i586/i686 implementation at run-time 2015-08-27 09:06:44 -07:00
i686 Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +00:00
i786 Also applying directories. 1999-01-24 10:39:22 +00:00
nptl NPTL: swap comments for THREAD_SETMEM and THREAD_SETMEM_NC for i386 and x86_64 2015-03-28 00:44:22 -04:00
sys Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
____longjmp_chk.S Add sigstack handling to Linux ____longjmp_chk on i386. 2009-07-30 21:50:14 -07:00
__longjmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
abort-instr.h update from main archive 961220 1996-12-21 04:13:58 +00:00
add_n.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
addmul_1.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
asm-syntax.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
atomic-machine.h Move bits/atomic.h to atomic-machine.h (bug 14912). 2015-09-11 20:00:19 +00:00
backtrace.c Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +00:00
bcopy.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
bzero.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
cacheinfo.c Use x86-64 cacheinfo.c and sysconf.c for x86 2015-08-19 04:27:04 -07:00
configure Remove assembler -mtune=i686 configure test. 2015-10-15 20:28:27 +00:00
configure.ac Remove assembler -mtune=i686 configure test. 2015-10-15 20:28:27 +00:00
crti.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
crtn.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-irel.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-lookupcfg.h Mark x86 _dl_unmap/_dl_make_tlsdesc_dynamic hidden 2015-10-15 13:48:54 -07:00
dl-machine.h Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
dl-procinfo.c Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-tlsdesc.h Mark x86 _dl_unmap/_dl_make_tlsdesc_dynamic hidden 2015-10-15 13:48:54 -07:00
dl-tlsdesc.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-trampoline.S Preserve bound registers for pointer pass/return 2015-07-09 06:50:12 -07:00
ffs.c Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
gmp-mparam.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
htonl.S Move i486/htonl.S to htonl.S 2015-08-27 07:50:34 -07:00
htons.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
i386-mcount.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Implies Use x86-64 bits/byteswap.h for both i386 and x86_64 2012-05-30 14:13:18 -07:00
init-arch.h Detect and select i586/i686 implementation at run-time 2015-08-27 09:06:44 -07:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ldsodefs.h Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
link-defines.sym Preserve bound registers for pointer pass/return 2015-07-09 06:50:12 -07:00
lshift.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile Don't disable SSE in x86-64 ld.so 2015-08-26 07:55:42 -07:00
memchr.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
memcmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
memcopy.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
memcpy_chk.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memcpy.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memmove_chk.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memmove.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
mempcpy_chk.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
mempcpy.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memset_chk.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memset.S Add i386 memset and memcpy assembly functions 2015-08-27 09:04:54 -07:00
memusage.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
mp_clz_tab.c Update. 2002-03-14 20:48:50 +00:00
mul_1.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
preconfigure Move base_machine and machine settings from configure.ac to sysdeps preconfigure fragments. 2014-06-25 17:52:56 +00:00
pthread_spin_trylock.S Move i486/pthread_spin_trylock.S to pthread_spin_trylock.S 2015-08-27 07:55:29 -07:00
rawmemchr.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
rshift.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
setfpucw.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
setjmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
stackguard-macros.h BZ #15754: CVE-2013-4788 2013-09-23 00:52:09 -04:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
start.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
stpcpy.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
stpncpy.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strcat.S Move i486/strcat.S to strcat.S 2015-08-27 07:56:41 -07:00
strchr.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strchrnul.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strcspn.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
string-inlines.c Move i486/string-inlines.c to string-inlines.c 2015-08-27 07:51:55 -07:00
strlen.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strlen.S Move i486/strlen.S to strlen.S 2015-08-27 07:57:55 -07:00
strpbrk.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strrchr.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strspn.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strtok_r.S Remove remaining bounded-pointers support from i386 .S files. 2013-02-21 22:21:52 +00:00
strtok.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sub_n.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
submul_1.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tls-macros.h i386: Fix build by GCC 5.0 2014-12-30 11:37:41 -08:00
tlsdesc.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tlsdesc.sym Introduce TLS descriptors for i386 and x86_64. 2008-05-13 05:41:30 +00:00
tst-audit3.c Add a testcase for i386 LD_AUDIT 2015-07-07 05:09:30 -07:00
tst-audit3.h Add a testcase for i386 LD_AUDIT 2015-07-07 05:09:30 -07:00
tst-audit.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tst-auditmod3a.c Add a testcase for i386 LD_AUDIT 2015-07-07 05:09:30 -07:00
tst-auditmod3b.c Add a missing break in tst-auditmod3b.c 2015-08-09 08:06:50 -07:00
tst-ld-sse-use.sh Don't disable SSE in x86-64 ld.so 2015-08-26 07:55:42 -07:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Versions Merge sysdeps/i386/elf/Versions into sysdeps/i386/Versions. 2012-03-19 21:02:40 +01:00