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* [Bug math/16271] New: dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes
@ 2013-11-27 21:42 jsm28 at gcc dot gnu.org
2013-11-28 16:51 ` [Bug math/16271] " jsm28 at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-11-27 21:42 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16271
Bug ID: 16271
Summary: dbl-64 e_sqrt.c not correctly rounding in non-default
rounding modes
Product: glibc
Version: 2.19
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
sysdeps/ieee754/dbl-64/e_sqrt.c does not produce correct results for all inputs
in rounding modes other than round-to-nearest, as illustrated by (on ARM):
Failure: Test: sqrt_towardzero (0xf.fffffp+124)
Result:
is: 1.84467435239537295360e+19 0x1.fffffeffffffc0000000p+63
should be: 1.84467435239537274880e+19 0x1.fffffeffffffb0000000p+63
difference: 2.04800000000000000000e+03 0x1.00000000000000000000p+11
ulp : 1.0000
max.ulp : 0.0000
Failure: Test: sqrt_towardzero (0xf.fffffp-4)
Result:
is: 9.99999970197677168215e-01 0x1.fffffeffffffc0000000p-1
should be: 9.99999970197677057193e-01 0x1.fffffeffffffb0000000p-1
difference: 1.11022302462515654042e-16 0x1.00000000000000000000p-53
ulp : 1.0000
max.ulp : 0.0000
Maximal error of `sqrt_towardzero'
is : 1 ulp
accepted: 0 ulp
Failure: Test: sqrt_downward (0xf.fffffp+124)
Result:
is: 1.84467435239537295360e+19 0x1.fffffeffffffc0000000p+63
should be: 1.84467435239537274880e+19 0x1.fffffeffffffb0000000p+63
difference: 2.04800000000000000000e+03 0x1.00000000000000000000p+11
ulp : 1.0000
max.ulp : 0.0000
Failure: Test: sqrt_downward (0xf.fffffp-4)
Result:
is: 9.99999970197677168215e-01 0x1.fffffeffffffc0000000p-1
should be: 9.99999970197677057193e-01 0x1.fffffeffffffb0000000p-1
difference: 1.11022302462515654042e-16 0x1.00000000000000000000p-53
ulp : 1.0000
max.ulp : 0.0000
Maximal error of `sqrt_downward'
is : 1 ulp
accepted: 0 ulp
Failure: Test: sqrt_upward (0x1.000002p+0)
Result:
is: 1.00000005960464299904e+00 0x1.000000ffffff80000000p+0
should be: 1.00000005960464322108e+00 0x1.000000ffffff90000000p+0
difference: 2.22044604925031308085e-16 0x1.00000000000000000000p-52
ulp : 1.0000
max.ulp : 0.0000
Maximal error of `sqrt_upward'
is : 1 ulp
accepted: 0 ulp
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^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug math/16271] dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes 2013-11-27 21:42 [Bug math/16271] New: dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes jsm28 at gcc dot gnu.org @ 2013-11-28 16:51 ` jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` cvs-commit at gcc dot gnu.org 2014-06-13 9:32 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-11-28 16:51 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=16271 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> --- Fixed for 2.19. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/16271] dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes 2013-11-27 21:42 [Bug math/16271] New: dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` [Bug math/16271] " jsm28 at gcc dot gnu.org @ 2013-11-28 16:51 ` cvs-commit at gcc dot gnu.org 2014-06-13 9:32 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2013-11-28 16:51 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=16271 --- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GNU C Library master sources". The branch, master has been updated via 3c1c46a64ad1037d616ec39514c4e55133997c9f (commit) from 5a4c6d53f50b264d60cf6453576ca2810c7890b7 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3c1c46a64ad1037d616ec39514c4e55133997c9f commit 3c1c46a64ad1037d616ec39514c4e55133997c9f Author: Joseph Myers <joseph@codesourcery.com> Date: Thu Nov 28 16:50:38 2013 +0000 Fix dbl-64 e_sqrt.c for non-default rounding modes (bug 16271). ----------------------------------------------------------------------- Summary of changes: ChangeLog | 17 +++++++++ NEWS | 2 +- include/fenv.h | 1 + math/fegetround.c | 1 + ports/ChangeLog.aarch64 | 5 +++ ports/ChangeLog.alpha | 5 +++ ports/ChangeLog.am33 | 4 ++ ports/ChangeLog.arm | 4 ++ ports/ChangeLog.hppa | 4 ++ ports/ChangeLog.ia64 | 4 ++ ports/ChangeLog.m68k | 4 ++ ports/ChangeLog.microblaze | 5 +++ ports/ChangeLog.mips | 4 ++ ports/sysdeps/aarch64/fpu/fegetround.c | 1 + ports/sysdeps/alpha/fpu/fegetround.c | 1 + ports/sysdeps/am33/fpu/fegetround.c | 1 + ports/sysdeps/arm/fegetround.c | 1 + ports/sysdeps/hppa/fpu/fegetround.c | 1 + ports/sysdeps/ia64/fpu/fegetround.c | 1 + ports/sysdeps/m68k/fpu/fegetround.c | 1 + ports/sysdeps/microblaze/fegetround.c | 1 + ports/sysdeps/mips/fpu/fegetround.c | 1 + sysdeps/i386/fpu/fegetround.c | 1 + sysdeps/ieee754/dbl-64/e_sqrt.c | 38 ++++++++++++++++++-- sysdeps/powerpc/fpu/fegetround.c | 1 + sysdeps/powerpc/nofpu/fegetround.c | 1 + sysdeps/powerpc/powerpc32/e500/nofpu/fegetround.c | 1 + sysdeps/s390/fpu/fegetround.c | 1 + sysdeps/sh/sh4/fpu/fegetround.c | 1 + sysdeps/sparc/fpu/fegetround.c | 1 + sysdeps/x86_64/fpu/fegetround.c | 1 + 31 files changed, 110 insertions(+), 5 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/16271] dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes 2013-11-27 21:42 [Bug math/16271] New: dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` [Bug math/16271] " jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` cvs-commit at gcc dot gnu.org @ 2014-06-13 9:32 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 9:32 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=16271 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-06-13 9:32 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-11-27 21:42 [Bug math/16271] New: dbl-64 e_sqrt.c not correctly rounding in non-default rounding modes jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` [Bug math/16271] " jsm28 at gcc dot gnu.org 2013-11-28 16:51 ` cvs-commit at gcc dot gnu.org 2014-06-13 9:32 ` fweimer at redhat dot com
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