://bugs.launchpad.net/qemu/+bug/1611394
Signed-off-by: Matthieu Bucchianeri
---
v2:
Split out fix for TCG leak in gen_evmwsmiaa().
Based-on: <20200727172114.31415-1-matthieu.bucchian...@leostella.com>
([PATCH] target/ppc: Fix TCG leak with the evmwsmiaa instruction)
target/ppc/translate/spe-impl.inc.
is not propagated. This will be fixed in my patch for bug #1888918.
Signed-off-by: Matthieu Bucchianeri
---
target/ppc/translate/spe-impl.inc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/ppc/translate/spe-impl.inc.c
b/target/ppc/translate/spe-impl.inc.c
index
Hello Balaton,
Thank you for your thorough review! See my response below.
> > static inline void gen_evmwsmiaa(DisasContext *ctx) {
> > -TCGv_i64 acc = tcg_temp_new_i64();
> > -TCGv_i64 tmp = tcg_temp_new_i64();
> > +TCGv_i64 acc;
> > +TCGv_i64 tmp;
> > +
> > +if (unlikely(!ct
-unavailable-exception-triggering.patch has no obvious
style problems and is ready for submission.
Please let me know if any other action is required.
-Original Message-
From: no-re...@patchew.org
Sent: Saturday, July 25, 2020 2:04 PM
To: Matthieu Bucchianeri
Cc: qemu-devel@nongnu.org; qemu
://bugs.launchpad.net/qemu/+bug/1611394
Signed-off-by: Matthieu Bucchianeri
---
target/ppc/translate/spe-impl.inc.c | 101 ++--
1 file changed, 66 insertions(+), 35 deletions(-)
diff --git a/target/ppc/translate/spe-impl.inc.c
b/target/ppc/translate/spe-impl.inc.c
index 36b4d5654d
** Changed in: qemu
Assignee: (unassigned) => Matthieu Bucchianeri (matthieu-bucchianeri)
** Changed in: qemu
Status: New => In Progress
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https://bugs.launchpad.ne
** Changed in: qemu
Status: New => In Progress
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You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1888918
Title:
qemu-system-ppc: Floating point instructions do not properly generate
the SPE/Em
Testing performed on the patch sent to the mailing list:
1) make check
2) Run the "spe-bug.c" userspace program, observed the correct result:
# qemu/ppc-softmmu/qemu-system-ppc -nographic -machine mpc8544ds -kernel
buildroot/output/images/uImage -hda buildroot/output/images/rootfs.cpio -append
> Note that on the MPC8548, it is observed that the "brinc"
> instruction does generate the interrupt, which contradicts
> section 4.2.3 SPE/Embedded Floating-Point Unavailable Interrupt
> of the Signal Processing Engine (SPE) Programming Environments
> Manual, Rev. 0 (see the quote in the descript
** Summary changed:
- qemu-ppc: Floating point instructions do not properly generate the
SPE/Embedded Floating-Point Unavailable interrupt
+ qemu-system-ppc: Floating point instructions do not properly generate the
SPE/Embedded Floating-Point Unavailable interrupt
** Description changed:
Whe
** Changed in: qemu
Assignee: (unassigned) => Matthieu Bucchianeri (matthieu-bucchianeri)
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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/1888918
Title:
qemu-ppc: Floating point instructions
I have filed a broader ticket, Bug #1888918, reporting a very similar
issue that leads to corruption/bad arithmetic when using double-
precision & vector instructions.
I will be submitting a patch in the next few days that will also address
this ticket.
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You received this bug notification beca
Attaching the output of the test module run on QEMU. As shown in the
description, 39 instructions do not comply with the rule described in
the Signal Processing Engine (SPE) Programming Environments Manual, Rev.
0.
QEMU was run as follows:
# qemu/ppc-softmmu/qemu-system-ppc -nographic -machine mp
I have already written a patch for this issue, that I will be submitting
to the community in the next few days.
--
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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1888918
Title:
qemu-ppc: Floating point
Attaching the test program mentioned in the description. This program (a
kernel module, in fact) can be loaded on a Linux system both in QEMU or
on real hardware.
In the next comments, I will attach the detailed output of the test
program.
** Attachment added: "SPE test module"
https://bugs.l
Attaching the output of the test module (above) when run on a real
MPC8548. This is to establish a baseline validating which instructions
shall or shall not generate the SPE/Embedded Floating-Point Unavailable
interrupt.
Note that on the MPC8548, it is observed that the "brinc" instruction
does ge
Public bug reported:
When emulating certain floating point instructions or vector
instructions on PowerPC machines, QEMU does not properly generate the
SPE/Embedded Floating-Point Unavailable interrupt.
As described in the Signal Processing Engine (SPE) Programming
Environments Manual, Rev. 0, av
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