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* [Bug math/16351] New: asin missing underflows
@ 2013-12-20 17:59 jsm28 at gcc dot gnu.org
2014-02-02 20:46 ` [Bug math/16351] " zimmerma+gcc at loria dot fr
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-12-20 17:59 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
Bug ID: 16351
Summary: asin missing underflows
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
At least some asin implementations do not raise the underflow exception for
subnormal arguments, when the result is tiny an inexact. For example, for
float on x86_64:
Failure: asin (0x8p-152): Exception "Underflow" not set
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* [Bug math/16351] asin missing underflows
2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
@ 2014-02-02 20:46 ` zimmerma+gcc at loria dot fr
2014-02-07 7:43 ` zimmerma+gcc at loria dot fr
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: zimmerma+gcc at loria dot fr @ 2014-02-02 20:46 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
Paul Zimmermann <zimmerma+gcc at loria dot fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zimmerma+gcc at loria dot fr
--- Comment #1 from Paul Zimmermann <zimmerma+gcc at loria dot fr> ---
idem in double precision with asin(0x1p-1074) on x86_64
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* [Bug math/16351] asin missing underflows
2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
2014-02-02 20:46 ` [Bug math/16351] " zimmerma+gcc at loria dot fr
@ 2014-02-07 7:43 ` zimmerma+gcc at loria dot fr
2014-06-13 11:23 ` fweimer at redhat dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: zimmerma+gcc at loria dot fr @ 2014-02-07 7:43 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
--- Comment #2 from Paul Zimmermann <zimmerma+gcc at loria dot fr> ---
idem in extended precision:
Testing function asin for exponent 0 [seed=8344].
rounding mode MPFR_RNDN:
wrong underflow flag for x=-d.0000000000000000@-4111
library gives -d.0000000000000000@-4111
mpfr gives -d.0000000000000000@-4111
underflow: mpfr 1, library 0
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* [Bug math/16351] asin missing underflows
2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
2014-02-02 20:46 ` [Bug math/16351] " zimmerma+gcc at loria dot fr
2014-02-07 7:43 ` zimmerma+gcc at loria dot fr
@ 2014-06-13 11:23 ` fweimer at redhat dot com
2015-02-26 17:23 ` cvs-commit at gcc dot gnu.org
2015-02-26 17:23 ` jsm28 at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 11:23 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug math/16351] asin missing underflows
2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
` (3 preceding siblings ...)
2015-02-26 17:23 ` cvs-commit at gcc dot gnu.org
@ 2015-02-26 17:23 ` jsm28 at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2015-02-26 17:23 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Fixed for 2.22.
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* [Bug math/16351] asin missing underflows
2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
` (2 preceding siblings ...)
2014-06-13 11:23 ` fweimer at redhat dot com
@ 2015-02-26 17:23 ` cvs-commit at gcc dot gnu.org
2015-02-26 17:23 ` jsm28 at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2015-02-26 17:23 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16351
--- Comment #3 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 ec0ce0d3be4ae21add09139c705852ed8bb114c7 (commit)
from 380bd0fd2418f8988217de950f8b8ff18af0cb2b (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=ec0ce0d3be4ae21add09139c705852ed8bb114c7
commit ec0ce0d3be4ae21add09139c705852ed8bb114c7
Author: Joseph Myers <joseph@codesourcery.com>
Date: Thu Feb 26 17:18:54 2015 +0000
Fix asin missing underflows (bug 16351).
Similar to various other bugs in this area, some asin implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact. This patch forces the exception in a
similar way to previous fixes.
Tested for x86_64, x86, powerpc and mips64.
[BZ #16351]
* sysdeps/i386/fpu/e_asin.S (dbl_min): New object.
(MO): New macro.
(__ieee754_asin): Force underflow exception for results with small
absolute value.
* sysdeps/i386/fpu/e_asinf.S (flt_min): New object.
(MO): New macro.
(__ieee754_asinf): Force underflow exception for results with
small absolute value.
* sysdeps/ieee754/dbl-64/e_asin.c: Include <float.h> and <math.h>.
(__ieee754_asin): Force underflow exception for results with small
absolute value.
* sysdeps/ieee754/flt-32/e_asinf.c: Include <float.h>.
(__ieee754_asinf): Force underflow exception for results with
small absolute value.
* sysdeps/ieee754/ldbl-128/e_asinl.c: Include <float.h>.
(__ieee754_asinl): Force underflow exception for results with
small absolute value.
* sysdeps/ieee754/ldbl-128ibm/e_asinl.c: Include <float.h>.
(__ieee754_asinl): Force underflow exception for results with
small absolute value.
* sysdeps/ieee754/ldbl-96/e_asinl.c: Include <float.h>.
(__ieee754_asinl): Force underflow exception for results with
small absolute value.
* sysdeps/x86_64/fpu/multiarch/e_asin.c [HAVE_FMA4_SUPPORT]:
Include <math.h>.
* math/auto-libm-test-in: Do not mark underflow exceptions as
possibly missing for bug 16351.
* math/auto-libm-test-out: Regenerated.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 30 +++++
NEWS | 8 +-
math/auto-libm-test-in | 9 +-
math/auto-libm-test-out | 200 ++++++++++++++++----------------
sysdeps/i386/fpu/e_asin.S | 34 ++++++-
sysdeps/i386/fpu/e_asinf.S | 34 ++++++-
sysdeps/ieee754/dbl-64/e_asin.c | 12 ++-
sysdeps/ieee754/flt-32/e_asinf.c | 6 +
sysdeps/ieee754/ldbl-128/e_asinl.c | 6 +
sysdeps/ieee754/ldbl-128ibm/e_asinl.c | 6 +
sysdeps/ieee754/ldbl-96/e_asinl.c | 6 +
sysdeps/x86_64/fpu/multiarch/e_asin.c | 1 +
12 files changed, 240 insertions(+), 112 deletions(-)
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2013-12-20 17:59 [Bug math/16351] New: asin missing underflows jsm28 at gcc dot gnu.org
2014-02-02 20:46 ` [Bug math/16351] " zimmerma+gcc at loria dot fr
2014-02-07 7:43 ` zimmerma+gcc at loria dot fr
2014-06-13 11:23 ` fweimer at redhat dot com
2015-02-26 17:23 ` cvs-commit at gcc dot gnu.org
2015-02-26 17:23 ` jsm28 at gcc dot gnu.org
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