Joseph Myers 600fa36158 Fix nextafter overflow in non-default rounding modes (bug 16677). ... ISO C requires the result of nextafter to be independent of the rounding mode, even when underflow or overflow occurs. This patch fixes the bug in various nextafter implementations that, having done an overflowing computation to force an overflow exception (correct), they then return the result of that computation rather than an infinity computed some other way (incorrect, when the overflowing result of arithmetic with that sign and rounding mode is finite but the correct result is infinite) - generally by falling through to existing code to return a value that in fact is correct for this case (but was computed by an integer increment and so without generating the exceptions required). Having fixed the bug, the previously deferred conversion of nextafter testing in libm-test.inc to ALL_RM_TEST is also included. Tested x86_64 and x86; also spot-checked results of nextafter tests for powerpc32 and mips64 to test the ldbl-128ibm and ldbl-128 changes. (The m68k change is untested.) [BZ #16677] * math/s_nextafter.c (__nextafter): Do not return value from overflowing computation. * sysdeps/i386/fpu/s_nextafterl.c (__nextafterl): Likewise. * sysdeps/ieee754/flt-32/s_nextafterf.c (__nextafterf): Likewise. * sysdeps/ieee754/ldbl-128/s_nextafterl.c (__nextafterl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c (__nextafterl): Likewise. * sysdeps/m68k/m680x0/fpu/s_nextafterl.c (__nextafterl): Likewise. * math/libm-test.inc (nextafter_test): Use ALL_RM_TEST.		2014-03-11 22:24:00 +00:00
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aarch64	[PATCH] [AArch64] Optional trapping exceptions support.	2014-03-07 14:05:20 +00:00
alpha	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
arm	ARM: Fix up setjmp/longjmp changes sfi_* macro use.	2014-03-11 10:59:01 -07:00
generic	BZ #16613: Support TLS in audit libraries.	2014-02-25 13:18:15 -05:00
gnu	Combine __USE_BSD and __USE_SVID into __USE_MISC.	2014-02-12 23:41:01 +00:00
i386	Fix nextafter overflow in non-default rounding modes (bug 16677).	2014-03-11 22:24:00 +00:00
ia64	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
ieee754	Fix nextafter overflow in non-default rounding modes (bug 16677).	2014-03-11 22:24:00 +00:00
init_array	Update copyright notices with scripts/update-copyrights	2014-01-01 22:00:23 +10:00
m68k	Fix nextafter overflow in non-default rounding modes (bug 16677).	2014-03-11 22:24:00 +00:00
mach	Complete _BSD_SOURCE / _SVID_source followup cleanup.	2014-02-21 21:45:26 +00:00
microblaze	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
mips	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
posix	Use glibc_likely instead __builtin_expect.	2014-02-10 15:07:12 +01:00
powerpc	PowerPC: Fix bzero definition for static libc for PPC64	2014-03-11 09:31:59 -05:00
pthread	Use glibc_likely instead __builtin_expect.	2014-02-10 15:07:12 +01:00
s390	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
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	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00
unix	Fix POSIX namespace for <bits/siginfo.h> (bug 16674).	2014-03-07 23:57:56 +00:00
wordsize-32	Update copyright notices with scripts/update-copyrights	2014-01-01 22:00:23 +10:00
wordsize-64	Update copyright notices with scripts/update-copyrights	2014-01-01 22:00:23 +10:00
x86	Enumerate tests with special rules in tests-special variable.	2014-03-06 22:35:33 +00:00
x86_64	Don't include individual test ulps in libm-test-ulps.	2014-03-05 15:02:38 +00:00