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Joseph Myers 9be36fb8cb Make x86_64 fegetenv preserve exception mask (bug 16198). 
Bug 16198 is x86_64 fegetenv wrongly masking exceptions for which
traps are enabled, because that's a side-effect of the fnstenv
instruction.  This patch fixes it to use fldenv immediately after
fnstenv, like the i386 version.  Tested x86_64 and x86.

	[BZ #16198]
	* sysdeps/x86_64/fpu/fegetenv.c (fegetenv): Use fldenv after
	fnstenv.
	* math/test-fenv-preserve.c: New file.
	* math/Makefile (tests): Add test-fenv-preserve.
 		2014-03-26 18:59:08 +00:00
..
aarch64 Compile with -Wundef. 2014-03-14 11:32:51 -07:00
alpha Compile with -Wundef. 2014-03-14 11:32:51 -07:00
arm Fix -Wundef warnins for __FP_FAST_FMA* 2014-03-21 17:28:43 +05:30
generic S390: Define SIZE_MAX as unsigned long (BZ #16712). 2014-03-24 16:59:01 +01:00
gnu Combine __USE_BSD and __USE_SVID into __USE_MISC. 2014-02-12 23:41:01 +00:00
i386 Relax gen-auto-libm-tests may-underflow rules, test log1p in all rounding modes. 2014-03-25 12:26:06 +00:00
ia64 Compile with -Wundef. 2014-03-14 11:32:51 -07:00
ieee754 Fix implicit __isinf declarations in exp. 2014-03-24 22:00:32 +00:00
init_array
…
m68k Compile with -Wundef. 2014-03-14 11:32:51 -07:00
mach Compile with -Wundef. 2014-03-14 11:32:51 -07:00
microblaze Compile with -Wundef. 2014-03-14 11:32:51 -07:00
mips Fix -Wundef warnings for _ABI* on MIPS. 2014-03-21 18:21:13 +00:00
posix Fix use of half-initialized result in getaddrinfo when using nscd (bug 16743) 2014-03-24 16:51:53 +01:00
powerpc Update powerpc-fpu ULPs. 2014-03-25 10:13:53 -05:00
pthread Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
s390 S390: Define SIZE_MAX as unsigned long (BZ #16712). 2014-03-24 16:59:01 +01:00
sh Don't include individual test ulps in libm-test-ulps. 2014-03-05 15:02:38 +00:00
sparc Don't include individual test ulps in libm-test-ulps. 2014-03-05 15:02:38 +00:00
tile Fix -Wundef warnins for __FP_FAST_FMA* 2014-03-21 17:28:43 +05:30
unix Fix use of uninitialized variable 2014-03-25 15:17:08 +01:00
wordsize-32
…
wordsize-64
…
x86 Fix -Wundef warnins for __FP_FAST_FMA* 2014-03-21 17:28:43 +05:30
x86_64 Make x86_64 fegetenv preserve exception mask (bug 16198). 2014-03-26 18:59:08 +00:00