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32b71ad358
glibc/sysdeps/powerpc/powerpc64
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Joseph Myers 32b71ad358 Fix powerpc64 lround, lroundf, llround, llroundf spurious "inexact" exceptions (bug 19235). 
Similar to bug 19134 for powerpc32, the powerpc64 implementations of
lround, lroundf, llround, llroundf can raise spurious "inexact"
exceptions for integer arguments from adding 0.5 then converting to
integer (this does not apply to the power5+ version for double, which
uses the frin instruction which is defined never to raise "inexact"; I
don't know why power5+ doesn't use that version for float as well).

This patch fixes the bug in a similar way to the powerpc32 bug, by
testing for integers (adding and subtracting 2^52 and comparing with
the value before that addition and subtraction) and not adding 0.5 in
that case.

The powerpc maintainers may wish to look at making power5+ / power6x /
power8 use frin for float lround / llround as well as for double,
unless there's some reason I've missed that this isn't beneficial.

Tested for powerpc64.

	[BZ #19235]
	* sysdeps/powerpc/powerpc64/fpu/s_llround.S (__llround): Do not
	add 0.5 to integer arguments.
	* sysdeps/powerpc/powerpc64/fpu/s_llroundf.S (__llroundf):
	Likewise.
	(.LC2): New object.
2015-11-12 16:24:00 +00:00
..
970 powerpc: Re-work the Implies structure 2010-06-30 09:57:38 -07:00
a2 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
bits Move bits/atomic.h to atomic-machine.h (bug 14912). 2015-09-11 20:00:19 +00:00
cell Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
fpu Fix powerpc64 lround, lroundf, llround, llroundf spurious "inexact" exceptions (bug 19235). 2015-11-12 16:24:00 +00:00
multiarch powerpc: make memchr use memchr-power7. 2015-08-21 17:05:40 -03:00
power4 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power5 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power5+ Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power6 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power6x Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power7 powerpc: Handle worstcase behavior in strstr() for POWER7 2015-08-25 13:45:56 -03:00
power8 PowerPC: Add comments to optimized strncpy 2015-10-01 17:36:55 -03:00
__longjmp-common.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
__longjmp.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
atomic-machine.h Move bits/atomic.h to atomic-machine.h (bug 14912). 2015-09-11 20:00:19 +00:00
backtrace.c libc-vdso.h place consolidation 2015-04-20 08:51:17 -03:00
bsd-_setjmp.S PowerPC64 ABI fixes 2010-08-12 09:19:19 -07:00
bsd-setjmp.S PowerPC64 ABI fixes 2010-08-12 09:19:19 -07:00
bzero.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
configure powerpc64 configure message 2015-03-25 15:45:36 +10:30
configure.ac powerpc64 configure message 2015-03-25 15:45:36 +10:30
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-dtprocnum.h 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-machine.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-machine.h Harden powerpc64 elf_machine_fixup_plt 2015-03-26 12:30:45 +10:30
dl-trampoline.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
entry.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ffsll.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
hp-timing.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Implies Revert "Use ieee754/dbl-64/wordsize-64 on powerpc64" 2013-01-10 10:44:05 +01:00
lshift.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile Remove HP_TIMING_DIFF_INIT and dl_hp_timing_overhead 2014-07-03 08:38:25 -07:00
memcpy.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
memset.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
mul_1.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ppc-mcount.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
register-dump.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
rtld-memset.c powerpc: Use generic memset for RTLD for ppc32/64 2010-09-29 12:21:14 -04:00
setjmp-common.S 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 PowerPC: Fix POINTER_CHK_GUARD thread register for PPC64 2013-09-25 13:43:04 -05:00
start.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strchr.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strcmp.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
strlen.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strncmp.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strpbrk.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 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strtok.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 powerpc: Fix tabort usage in syscalls 2015-08-25 13:45:56 -03:00
tls-macros.h powerpc: Remove HAVE_ASM_GLOBAL_DOT_NAME define 2015-03-11 09:01:05 -04:00
tst-audit.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00