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32b71ad358
glibc/sysdeps/powerpc
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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
..
bits Move bits/atomic.h to atomic-machine.h (bug 14912). 2015-09-11 20:00:19 +00:00
fpu Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +00:00
nofpu Regenerate powerpc-nofpu libm-test-ulps. 2015-07-01 18:04:28 +00:00
nptl powerpc: Fix usage of elision transient failure adapt param 2015-10-27 17:27:41 -02:00
power4 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power5+/fpu 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
power7/fpu Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
powerpc32 Fix powerpc nearbyint wrongly clearing "inexact" and leaving traps disabled (bug 19228). 2015-11-11 00:06:09 +00:00
powerpc64 Fix powerpc64 lround, lroundf, llround, llroundf spurious "inexact" exceptions (bug 19235). 2015-11-12 16:24:00 +00:00
soft-fp soft-fp: support after-rounding tininess detection. 2014-02-12 18:27:12 +00:00
sys/platform PowerPC: Extend Program Priority Register support 2015-08-19 17:43:26 -03:00
abort-instr.h Update. 2002-09-15 18:31:23 +00:00
atomic-machine.h Move bits/atomic.h to atomic-machine.h (bug 14912). 2015-09-11 20:00:19 +00:00
dl-procinfo.c powerpc: Sync hwcap.h with kernel 2015-08-26 14:55:40 -03:00
dl-procinfo.h powerpc: Add missing hwcap strings. 2015-08-18 15:48:43 -03:00
dl-tls.c powerpc __tls_get_addr call optimization 2015-03-25 15:53:47 +10:30
dl-tls.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
fpu_control.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ifunc-sel.h Move sysdeps/powerpc/elf files 2012-03-28 09:25:31 +02:00
Implies PowerPC: unify math_ldbl.h implementations 2013-03-08 11:07:15 -03:00
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
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
libc-tls.c powerpc: Provide __tls_get_addr () in static libc 2015-10-28 11:42:23 -02:00
locale-defines.sym Optimized strcasecmp for Power7 2011-12-17 20:32:59 -05:00
longjmp.c 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 powerpc __tls_get_addr call optimization 2015-03-25 15:53:47 +10:30
math-tests.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
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
novmx-longjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
novmx-sigjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
novmxsetjmp.h 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
rtld-global-offsets.sym PowerPC: Define AT_HWCAP2 bits and AT_HWCAP2 handling for POWER8. 2013-06-28 16:52:49 -05:00
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sigjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sotruss-lib.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strcat.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sysdep.h powerpc: abort transaction in syscalls 2015-01-12 06:32:08 -05:00
test-arith.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
test-arithf.c Update. 1997-08-10 18:37:15 +00:00
test-gettimebase.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tls-macros.h Split tls-macros.h in sysdeps directories. 2012-07-19 17:04:04 -03:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tst-tlsopt-powerpc.c powerpc __tls_get_addr call optimization 2015-03-25 15:53:47 +10:30
Versions powerpc __tls_get_addr call optimization 2015-03-25 15:53:47 +10:30