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* [Bug soft-fp/15667] New: __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul
@ 2013-06-22 11:41 jsm28 at gcc dot gnu.org
2013-06-22 19:28 ` [Bug soft-fp/15667] " jsm28 at gcc dot gnu.org
2014-06-13 17:30 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-06-22 11:41 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15667
Bug ID: 15667
Summary: __FP_FRAC_ADD_3 shadowing variables in
_FP_MUL_MEAT_2_wide_3mul
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: soft-fp
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
CC: joseph at codesourcery dot com
The soft-fp macro __FP_FRAC_ADD_3 defines variables _c1 and _c2. The macro
_FP_MUL_MEAT_2_wide_3mul defines its own variables with those names and calls
__FP_FRAC_ADD_3 with arguments involving them, yielding erroneous results when
the wrong variables get used.
(I don't think this actually affects the current uses of soft-fp in glibc on
any architecture; it came up while testing a patch adding new uses. But it
seems appropriate to file this in Bugzilla anyway.)
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* [Bug soft-fp/15667] __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul
2013-06-22 11:41 [Bug soft-fp/15667] New: __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul jsm28 at gcc dot gnu.org
@ 2013-06-22 19:28 ` jsm28 at gcc dot gnu.org
2014-06-13 17:30 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-06-22 19:28 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15667
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Fixed for 2.18 by:
commit 695c378f81263640618bdebf56eaa065f578251f
Author: Joseph Myers <joseph@codesourcery.com>
Date: Sat Jun 22 19:27:41 2013 +0000
Fix soft-fp shadowing between __FP_FRAC_ADD_3 and _FP_MUL_MEAT_2_wide_3mul
(bug 15667).
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* [Bug soft-fp/15667] __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul
2013-06-22 11:41 [Bug soft-fp/15667] New: __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul jsm28 at gcc dot gnu.org
2013-06-22 19:28 ` [Bug soft-fp/15667] " jsm28 at gcc dot gnu.org
@ 2014-06-13 17:30 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 17:30 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=15667
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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end of thread, other threads:[~2014-06-13 17:30 UTC | newest]
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2013-06-22 11:41 [Bug soft-fp/15667] New: __FP_FRAC_ADD_3 shadowing variables in _FP_MUL_MEAT_2_wide_3mul jsm28 at gcc dot gnu.org
2013-06-22 19:28 ` [Bug soft-fp/15667] " jsm28 at gcc dot gnu.org
2014-06-13 17:30 ` fweimer at redhat dot com
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