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glibc/sysdeps/ieee754/ldbl-128ibm
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Joseph Myers 909f8e14db Fix ldbl-128ibm strtold overflow handling (bug 14551). 
For ldbl-128ibm, if the result of strtold overflows in the final
conversion from MPN to IBM long double (because the exponent for a
106-bit IEEE result is 1023 but the high part would end up as
0x1p1024, which overflows), that conversion code fails to handle this
and produces an invalid long double value (high part infinite, low
part not zero) without raising exceptions or setting errno.  This
patch adds an explicit check for this case to ensure an appropriate
result is returned in a way that ensures the right exceptions are
raised, with errno set.

Tested for powerpc.

	[BZ #14551]
	* sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c: Include <errno.h>.
	(__mpn_construct_long_double): If high part overflows to infinity,
	set errno and recompute overflowed result of the correct sign.
	* sysdeps/ieee754/ldbl-128ibm/Makefile
	[$(subdir) = stdlib] (tests): Add tst-strtold-ldbl-128ibm.
	[$(subdir) = stdlib] ($(objpfx)tst-strtold-ldbl-128ibm): Depend on
	$(libm).
	* sysdeps/ieee754/ldbl-128ibm/tst-strtold-ldbl-128ibm.c: New file.
 		2015-11-13 12:03:46 +00:00
..
Makefile Fix ldbl-128ibm strtold overflow handling (bug 14551). 2015-11-13 12:03:46 +00:00
e_acoshl.c Fix ldbl-128ibm acoshl inaccuracy (bug 18019). 2015-02-25 00:01:15 +00:00
e_acosl.c This patch renames all uses of __isinf*, __isnan*, __finite* and __signbit* to use standard C99 macros. This has no effect on generated code. 2015-06-03 15:41:36 +01:00
e_asinl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_atan2l.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
e_atanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_coshl.c Fix cosh spurious underflows from expm1 (bug 16354), inaccurate results near 0 (bug 17061). 2014-06-23 20:20:10 +00:00
e_exp10l.c Fix ldbl-128ibm exp10l spurious overflows (bug 16620). 2015-09-30 23:34:59 +00:00
e_expl.c This patch renames all uses of __isinf*, __isnan*, __finite* and __signbit* to use standard C99 macros. This has no effect on generated code. 2015-06-03 15:41:36 +01:00
e_fmodl.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
e_gammal_r.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_hypotl.c Fix hypot missing underflows (bug 18803). 2015-09-24 23:43:57 +00:00
e_ilogbl.c Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029). 2015-02-26 12:57:21 +00:00
e_j0l.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_j1l.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_jnl.c Fix j1, jn missing errno setting on underflow (bug 18611). 2015-10-23 21:37:33 +00:00
e_lgammal_r.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_log2l.c Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +00:00
e_log10l.c Fix log10 (1) in round-downward mode (bug 16977). 2014-05-23 12:07:50 +00:00
e_logl.c Fix ldbl-128ibm logl (1) sign of zero result (bug 19077). 2015-10-06 15:32:06 +00:00
e_powl.c Fix pow missing underflows (bug 18825). 2015-09-25 22:29:10 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_remainderl.c PowerPC floating point little-endian [4 of 15] 2013-10-04 10:32:48 +09:30
e_sinhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_sqrtl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
gamma_productl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ieee754.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_cosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_sincosl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
k_sinl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
k_tanl.c Remove GCC version conditionals on -Wmaybe-uninitialized pragmas. 2015-10-27 23:42:20 +00:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
lgamma_negl.c Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
lgamma_productl.c Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
math_ldbl.h Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
mpn2ldbl.c Fix ldbl-128ibm strtold overflow handling (bug 14551). 2015-11-13 12:03:46 +00:00
printf_fphex.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_asinhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_atanl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_cbrtl.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
s_ceill.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_copysignl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_cosl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_erfl.c Work around powerpc32 integer 0 converting to -0 (bug 887, bug 19049, bug 19050). 2015-10-05 17:46:50 +00:00
s_expm1l.c Clean up ldbl-128 / ldbl-128ibm expm1l dead code (bug 16415). 2015-09-16 16:42:46 +00:00
s_fabsl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_finitel.c Reduce number of constants in __finite* (bug 15384). 2015-09-17 16:47:14 +00:00
s_floorl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_fmal.c Replace finite with isfinite. 2015-06-03 16:35:44 +01:00
s_fpclassifyl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_frexpl.c FIx ldbl-128ibm frexpl for 32-bit systems (bug 16619, bug 16740). 2014-11-26 13:54:55 +00:00
s_isinfl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_isnanl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_issignalingl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llrintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_log1pl.c Fix ldbl-128ibm log1pl (-1) sign of infinity (bug 19076). 2015-10-06 15:14:26 +00:00
s_logbl.c Work around powerpc32 integer 0 converting to -0 (bug 887, bug 19049, bug 19050). 2015-10-05 17:46:50 +00:00
s_lrintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_lroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_modfl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_nearbyintl.c Fix ldbl-128ibm nearbyintl use of signaling comparisons on NaNs (bug 18857). 2015-09-15 20:48:05 +00:00
s_nextafterl.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +00:00
s_nexttoward.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +00:00
s_nexttowardf.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +00:00
s_remquol.c Fix sign of remquo zero remainder in round-downward mode (bug 17987). 2015-02-17 00:41:50 +00:00
s_rintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_roundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_scalblnl.c [BZ #6803] Set errno for scalbln, scalbn 2014-06-20 07:48:20 +05:30
s_scalbnl.c Make scalbn set errno (bug 6803). 2015-09-16 21:11:00 +00:00
s_signbitl.c Use the GCC builtin functions for the non-inlined signbit implementations. 2015-09-18 16:39:08 +01:00
s_sincosl.c Since we now inline isinf, isnan and isfinite in math.h, replace uses of __isinf_ns(l/f) 2015-09-18 20:51:52 +01:00
s_sinl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_tanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_tanl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_truncl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strtold_l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
t_sincosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tst-strtold-ldbl-128ibm.c Fix ldbl-128ibm strtold overflow handling (bug 14551). 2015-11-13 12:03:46 +00:00
w_expl.c Fix ldbl-128ibm expl overflow in non-default rounding modes (bug 19078). 2015-10-06 17:37:49 +00:00
w_log1pl.c Set errno for log1p on pole/domain error. 2015-04-13 21:19:27 +02:00
w_scalblnl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
x2y2m1l.c Fix clog, clog10 inaccuracy (bug 19016). 2015-09-28 22:11:22 +00:00