* [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr
@ 2020-12-17 16:45 Szabolcs Nagy
2020-12-28 19:35 ` [Bug 1908551] " Richard Henderson
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: Szabolcs Nagy @ 2020-12-17 16:45 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
** Affects: qemu
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
New
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
@ 2020-12-28 19:35 ` Richard Henderson
2020-12-29 18:25 ` Richard Henderson
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-28 19:35 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: New => Confirmed
** Changed in: qemu
Assignee: (unassigned) => Richard Henderson (rth)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Confirmed
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
2020-12-28 19:35 ` [Bug 1908551] " Richard Henderson
@ 2020-12-29 18:25 ` Richard Henderson
2020-12-29 18:34 ` Richard Henderson
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-29 18:25 UTC (permalink / raw)
To: qemu-devel
I don't know why the test worked previously, and I did not
investigate, but as far as I can tell, the test is broken.
The test is returning a value >= maxlen because it it using
the wrong increment. Fixed thus.
** Patch added: "z.patch"
https://bugs.launchpad.net/qemu/+bug/1908551/+attachment/5447723/+files/z.patch
** Changed in: qemu
Status: Confirmed => Invalid
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Invalid
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
2020-12-28 19:35 ` [Bug 1908551] " Richard Henderson
2020-12-29 18:25 ` Richard Henderson
@ 2020-12-29 18:34 ` Richard Henderson
2020-12-29 18:54 ` Richard Henderson
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-29 18:34 UTC (permalink / raw)
To: qemu-devel
FWIW, as I think on this further, this probably isn't the
ideal fix -- I recall now that INCP is a "reduction" class
instruction and thus its overhead is non-trivial.
We could instead add an integer min operation at label 9,
which is outside of the main loop.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Invalid
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
` (2 preceding siblings ...)
2020-12-29 18:34 ` Richard Henderson
@ 2020-12-29 18:54 ` Richard Henderson
2020-12-30 1:46 ` Richard Henderson
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-29 18:54 UTC (permalink / raw)
To: qemu-devel
Bah. The code at label 9 does not match the comment.
Best fixed thus.
** Patch added: "z.patch"
https://bugs.launchpad.net/qemu/+bug/1908551/+attachment/5447736/+files/z.patch
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Invalid
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
` (3 preceding siblings ...)
2020-12-29 18:54 ` Richard Henderson
@ 2020-12-30 1:46 ` Richard Henderson
2020-12-30 17:30 ` Richard Henderson
2021-04-30 8:52 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-30 1:46 UTC (permalink / raw)
To: qemu-devel
... but you also mentioned strrchr, and there is a qemu bug there. The
REV (predicate) instruction doesn't seem to be doing the right thing --
input 0x1 -> output 0x80000000 which is not correct for the current
vector length (64).
** Changed in: qemu
Status: Invalid => Confirmed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Confirmed
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
` (4 preceding siblings ...)
2020-12-30 1:46 ` Richard Henderson
@ 2020-12-30 17:30 ` Richard Henderson
2021-04-30 8:52 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Richard Henderson @ 2020-12-30 17:30 UTC (permalink / raw)
To: qemu-devel
Patch fixing strrchr:
https://patchew.org/QEMU/20201230172522.33629-1-richard.henderson@linaro.org/
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Confirmed
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug 1908551] Re: aarch64 SVE emulation breaks strnlen and strrchr
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
` (5 preceding siblings ...)
2020-12-30 17:30 ` Richard Henderson
@ 2021-04-30 8:52 ` Thomas Huth
6 siblings, 0 replies; 8+ messages in thread
From: Thomas Huth @ 2021-04-30 8:52 UTC (permalink / raw)
To: qemu-devel
https://gitlab.com/qemu-project/qemu/-/commit/70acaafef2e053a3
** Changed in: qemu
Status: Confirmed => 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/1908551
Title:
aarch64 SVE emulation breaks strnlen and strrchr
Status in QEMU:
Fix Released
Bug description:
arm optimized-routines have sve string functions with test code.
the test worked up until recently: with qemu-5.2.0 i see
$ qemu-aarch64 build/bin/test/strnlen
PASS strnlen
PASS __strnlen_aarch64
__strnlen_aarch64_sve (0x490fa0, 32) len 32 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80"
__strnlen_aarch64_sve (0x490fa0, 32) len 33 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 33) len 33 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a"
__strnlen_aarch64_sve (0x490fa0, 32) len 34 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 33) len 34 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 34) len 34 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab"
__strnlen_aarch64_sve (0x490fa0, 32) len 35 returned 64, expected 32
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80a\x00c"
__strnlen_aarch64_sve (0x490fa0, 33) len 35 returned 64, expected 33
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80ab\x00"
__strnlen_aarch64_sve (0x490fa0, 34) len 35 returned 64, expected 34
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
__strnlen_aarch64_sve (0x490fa0, 35) len 35 returned 64, expected 35
input: "abcdefghijklmnopqrstuvwxyz\{|}~\x7f\x80abc"
FAIL __strnlen_aarch64_sve
however the test passes with
qemu-aarch64 -cpu max,sve-max-vq=2
there should be nothing vector length specific in the code.
i haven't debugged it further, to reproduce the issue clone
https://github.com/ARM-software/optimized-routines
and run 'make build/bin/test/strnlen' with a config.mk like
SUBS = string
ARCH = aarch64
CROSS_COMPILE = aarch64-none-linux-gnu-
CC = $(CROSS_COMPILE)gcc
CFLAGS = -std=c99 -pipe -O3
CFLAGS += -march=armv8.2-a+sve
EMULATOR = qemu-aarch64
(native compilation works too, and you can run 'make check' to
run all string tests) this will build a static linked executable
into build/bin/test. if you want a smaller test case edit
string/test/strnlen.c
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1908551/+subscriptions
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-04-30 9:06 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-12-17 16:45 [Bug 1908551] [NEW] aarch64 SVE emulation breaks strnlen and strrchr Szabolcs Nagy
2020-12-28 19:35 ` [Bug 1908551] " Richard Henderson
2020-12-29 18:25 ` Richard Henderson
2020-12-29 18:34 ` Richard Henderson
2020-12-29 18:54 ` Richard Henderson
2020-12-30 1:46 ` Richard Henderson
2020-12-30 17:30 ` Richard Henderson
2021-04-30 8:52 ` Thomas Huth
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.