* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
@ 2015-07-23 18:40 ` Daniel Milewski
2015-07-23 19:17 ` Sandmann
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Daniel Milewski @ 2015-07-23 18:40 UTC (permalink / raw)
To: qemu-devel
** Description changed:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
- I have this issue in QEMU 2.3.0 on two different x86 guests (Parabola
- GNU/Linux-libre and libreCMC).
+ I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
+ (Parabola GNU/Linux-libre and libreCMC).
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https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
New
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC).
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
2015-07-23 18:40 ` [Qemu-devel] [Bug 1477683] " Daniel Milewski
@ 2015-07-23 19:17 ` Sandmann
2015-07-24 9:24 ` Daniel Milewski
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Sandmann @ 2015-07-23 19:17 UTC (permalink / raw)
To: qemu-devel
I think, that I have the same issue. After some git bisect, I found out
that commit ea32aaf1a72af102b855317b47a22e75ac2965a9 has introduced the
problem. Attached is a patch that fixes the issue for me. Maybe you can
try this out, too.
** Patch added: "0001-target-i386-Fix-conversion-infinity-from-float80-to-.patch"
https://bugs.launchpad.net/qemu/+bug/1477683/+attachment/4433257/+files/0001-target-i386-Fix-conversion-infinity-from-float80-to-.patch
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https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
New
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC).
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
2015-07-23 18:40 ` [Qemu-devel] [Bug 1477683] " Daniel Milewski
2015-07-23 19:17 ` Sandmann
@ 2015-07-24 9:24 ` Daniel Milewski
2015-07-24 9:46 ` Daniel Milewski
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Daniel Milewski @ 2015-07-24 9:24 UTC (permalink / raw)
To: qemu-devel
** Description changed:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
- (Parabola GNU/Linux-libre and libreCMC).
+ (Parabola GNU/Linux-libre and libreCMC.)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
New
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC.)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
` (2 preceding siblings ...)
2015-07-24 9:24 ` Daniel Milewski
@ 2015-07-24 9:46 ` Daniel Milewski
2015-07-24 13:40 ` Aurelien Jarno
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Daniel Milewski @ 2015-07-24 9:46 UTC (permalink / raw)
To: qemu-devel
Thanks! That patch solves the issue for me. May I ask maintainer to
commit the fix?
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https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
New
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC.)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
` (3 preceding siblings ...)
2015-07-24 9:46 ` Daniel Milewski
@ 2015-07-24 13:40 ` Aurelien Jarno
2015-07-24 13:45 ` Sandmann
2016-06-27 19:11 ` T. Huth
6 siblings, 0 replies; 8+ messages in thread
From: Aurelien Jarno @ 2015-07-24 13:40 UTC (permalink / raw)
To: qemu-devel
Someone has posted a similar fix a few weeks ago, and it has just been
merged.
** Changed in: qemu
Status: New => Fix Committed
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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
Fix Committed
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC.)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
` (4 preceding siblings ...)
2015-07-24 13:40 ` Aurelien Jarno
@ 2015-07-24 13:45 ` Sandmann
2016-06-27 19:11 ` T. Huth
6 siblings, 0 replies; 8+ messages in thread
From: Sandmann @ 2015-07-24 13:45 UTC (permalink / raw)
To: qemu-devel
Great, thanks for the information. I was just about to send the patch to
the mailing list, but this seems to unnecessary now.
--
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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
Fix Committed
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC.)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread* [Qemu-devel] [Bug 1477683] Re: FPU in qemu-system-i386 works incorrectly
2015-07-23 17:01 [Qemu-devel] [Bug 1477683] [NEW] FPU in qemu-system-i386 works incorrectly Daniel Milewski
` (5 preceding siblings ...)
2015-07-24 13:45 ` Sandmann
@ 2016-06-27 19:11 ` T. Huth
6 siblings, 0 replies; 8+ messages in thread
From: T. Huth @ 2016-06-27 19:11 UTC (permalink / raw)
To: qemu-devel
If I've got that right, the fix had been included here:
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=178846bdd93994c1acaf
... so closing this ticket now.
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1477683
Title:
FPU in qemu-system-i386 works incorrectly
Status in QEMU:
Fix Released
Bug description:
FPU bug in qemu-system-i386 makes software which use floating point
numbers work incorrectly. For instance, the one included in attachment
prints out 0 instead of 2147483648. The same code works ok in qemu-
system-x86_64.
I have this issue in QEMU 2.3.0 on two different GNU/Linux guests
(Parabola GNU/Linux-libre and libreCMC.)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1477683/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread