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* [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date)
@ 2013-05-20 4:22 adam at spicenitz dot org
2013-05-20 12:12 ` [Bug ports/15492] " joseph at codesourcery dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: adam at spicenitz dot org @ 2013-05-20 4:22 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15492
Bug #: 15492
Summary: ARM fesetenv doesn't preserve RunFast (reserved bits
out of date)
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: ports
AssignedTo: unassigned@sourceware.org
ReportedBy: adam@spicenitz.org
CC: carlos@redhat.com, roland@gnu.org
Classification: Unclassified
_FPU_RESERVED in ports/sysdeps/arm/fpu_control.h is out of date. It improperly
masks bits that are now valid, including the Default NaN bit. This means
"RunFast" mode (where bits 24 and 25 are set) does not work across fesetenv.
Here is a more recent list of this bits:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438h/CDEFCBDC.html
Given this new documentation, perhaps _FPU_RESERVED should now read as 0x8FF60.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug ports/15492] ARM fesetenv doesn't preserve RunFast (reserved bits out of date) 2013-05-20 4:22 [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date) adam at spicenitz dot org @ 2013-05-20 12:12 ` joseph at codesourcery dot com 2013-05-20 14:23 ` adam at spicenitz dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: joseph at codesourcery dot com @ 2013-05-20 12:12 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15492 --- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2013-05-20 12:12:32 UTC --- On Mon, 20 May 2013, adam at spicenitz dot org wrote: > http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438h/CDEFCBDC.html > > Given this new documentation, perhaps _FPU_RESERVED should now read as 0x8FF60. You're looking at documentation for one particular processor, which lists as reserved bits that on other processors aren't reserved (e.g. trap enable bits). DDI0406C suggests the correct reserved bits are 0x86060. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug ports/15492] ARM fesetenv doesn't preserve RunFast (reserved bits out of date) 2013-05-20 4:22 [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date) adam at spicenitz dot org 2013-05-20 12:12 ` [Bug ports/15492] " joseph at codesourcery dot com @ 2013-05-20 14:23 ` adam at spicenitz dot org 2013-06-14 21:21 ` jsm28 at gcc dot gnu.org 2014-06-13 17:43 ` fweimer at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: adam at spicenitz dot org @ 2013-05-20 14:23 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15492 --- Comment #2 from Adam Goode <adam at spicenitz dot org> 2013-05-20 14:23:53 UTC --- Yes, 0x86060 looks right. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug ports/15492] ARM fesetenv doesn't preserve RunFast (reserved bits out of date) 2013-05-20 4:22 [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date) adam at spicenitz dot org 2013-05-20 12:12 ` [Bug ports/15492] " joseph at codesourcery dot com 2013-05-20 14:23 ` adam at spicenitz dot org @ 2013-06-14 21:21 ` jsm28 at gcc dot gnu.org 2014-06-13 17:43 ` fweimer at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-06-14 21:21 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15492 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #3 from Joseph Myers <jsm28 at gcc dot gnu.org> --- Fixed for 2.18 by: commit c69f6af9e5a03620c253e75fd925d38adaa3c039 Author: Joseph Myers <joseph@codesourcery.com> Date: Fri Jun 14 21:19:35 2013 +0000 Update ARM _FPU_RESERVED value. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug ports/15492] ARM fesetenv doesn't preserve RunFast (reserved bits out of date) 2013-05-20 4:22 [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date) adam at spicenitz dot org ` (2 preceding siblings ...) 2013-06-14 21:21 ` jsm28 at gcc dot gnu.org @ 2014-06-13 17:43 ` fweimer at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 17:43 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15492 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] 5+ messages in thread
end of thread, other threads:[~2014-06-13 17:43 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-05-20 4:22 [Bug ports/15492] New: ARM fesetenv doesn't preserve RunFast (reserved bits out of date) adam at spicenitz dot org 2013-05-20 12:12 ` [Bug ports/15492] " joseph at codesourcery dot com 2013-05-20 14:23 ` adam at spicenitz dot org 2013-06-14 21:21 ` jsm28 at gcc dot gnu.org 2014-06-13 17:43 ` fweimer at redhat dot com
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