== GCC ==
* Fixed vectorizer bug causing unaligned memory accesses
(LP 1010826 / GCC PR 53636); checked in to GCC mainline
and Linaro GCC 4.7. Backports to FSF 4.7 and Linaro
GCC 4.6 are under way.
* Investigated vectorizer performance regression reported
by Mans; main problem seems to be lack of use of the
vectorizer cost model by default on ARM, but other
aspects of the vectorized code could be improved as well.
* Created blueprint to tune vectorizer cost mode on ARM
and enable it by default.
* Ongoing work on reassociation pass.
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand | Phone: +49-7031/16-3727
STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E.
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk
Wittkopp
Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht
Stuttgart, HRB 243294
The Linaro Toolchain Working Group is pleased to announce the release of
Linaro QEMU 2012-06.
Linaro QEMU 2012.06 is the latest release of qemu-linaro. Based off
upstream qemu, it includes a number of ARM-focused bug fixes and
enhancements.
There are no major changes with this release, though it has been updated
to the latest (1.1.0) qemu.
The source tarball is available at:
https://launchpad.net/qemu-linaro/+milestone/2012.06
More information on Linaro QEMU is available at:
https://launchpad.net/qemu-linaro
We talked at Connect about finishing up the cortex-strings work by
upstreaming them into Bionic, Newlib, and GLIBC. I've written up one
of our standard 'Output' pages:
https://wiki.linaro.org/WorkingGroups/ToolChain/Outputs/CortexStrings
with a summary of what we did, what else exists, benchmark results,
and next steps. This can be used to justify the routines to the
different upstreams.
The Android guys are going to upstream these to Bionic. I need a
volunteer to do Newlib and GLIBC.
One surprise was that the Newlib plain C routines are very good on
strings - probably due to a good end of string detector.
-- Michael
Hi,
OpenEmbedded-Core/meta-linaro:
* worked on building oe-core+meta-linaro using the 2012.05 release of
the binary toolchain
* minimal sysroot contains libraries that reference the old
ld-linux.so.3 loader
* created #1011671
* otherwise works fine for oe-core+meta-linaro
* setup the build env on tcserver01
* verified the 2012.06 RC of linaro GCC 4.7 and 4.6
* 4.7 looks good
* 4.6 has ICE when building Qt -mfpu=neon
* reduced testcase available at bug #1013209
* updated meta-linaro (master) to pull in version 2012.06 of Linaro
GCC 4.6/4.7
Regards,
Ken
Hello,
I am wondering if there is support for gettext in the linaro toolchain?
How can I check it if it should work or not?
I can compile and link the "setlocale()" and "bindtextdomain()" and
"textdomain()" functions, however, the translation doesn't work.
Best regards
Tom,
--
*Tom Deblauwe*
*R&D Engineer*
Traficon International N.V.
Vlamingstraat 19
B-8560 Wevelgem
Belgium
Tel.: +32 (0)56 37.22.00
Fax: +32 (0)56 37.21.96
URL: www.traficon.com <http://www.traficon.com>
I noticed this bug upstream about C++11 and C++98 ABI
incompatibilities , in case someone is using the C++11 features,
please be aware that there is an ABI bug lurking.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53646
Ramana
The Linaro Toolchain Working Group is pleased to announce the release of
Linaro GDB 7.4 2012.06.
Linaro GDB 7.4 2012.06 is the third release in the 7.4 series. Based off
the latest GDB 7.4.1, it includes a number of bug fixes.
Interesting changes include:
* GDB now expands tildes in solib-search-path entries.
* Updated to the GDB 7.4.1 code base.
https://launchpad.net/gdb-linaro/+milestone/7.4-2012.06
More information on Linaro GDB is available at:
https://launchpad.net/gdb-linaro
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
The Linaro Toolchain Working Group is pleased to announce the 2012.06
release of both Linaro GCC 4.7 and Linaro GCC 4.6.
Linaro GCC 4.7 2012.06 is the third release in the 4.7 series. Based
off the latest GCC 4.7.0+svn188038 release, it includes performance
improvements especially around 64 bit operations.
Interesting changes include:
* Updates to GCC 4.7.0+svn188038
* Adds multilib support for use in the binary builds
* Improves performance of 64 bit shifts in core registers
Fixes:
* LP: #949805 GCC doesn't by default use %gnu_unique_object
* LP: #990530 internal compiler error: in convert, at lto/lto-lang.c:1292
* An off-by-one error in vrev
Linaro GCC 4.6 2012.06 is the sixteenth release in the 4.6 series.
Based off the latest GCC 4.6.3+svn188320 release, this is the third
release after entering maintenance.
Interesting changes include:
* Updates to 4.6.3+svn188320
* Uses the new /lib/ld-linux-armhf.so.3 loader for hard float binaries
Fixes:
* LP: #949805 GCC doesn't by default use %gnu_unique_object
* LP: #990530 internal compiler error: in convert, at lto/lto-lang.c:1292
The source tarballs are available from:
https://launchpad.net/gcc-linaro/+milestone/4.7-2012.06https://launchpad.net/gcc-linaro/+milestone/4.6-2012.06
Downloads are available from the Linaro GCC page on Launchpad:
https://launchpad.net/gcc-linaro
More information on the features and issues are available from the
release page:
https://launchpad.net/gcc-linaro/4.7/4.7-2012.06
Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Bugs: https://bugs.launchpad.net/gcc-linaro/
Questions? https://ask.linaro.org/
Interested in commercial support? Inquire at support(a)linaro.org
-- Michael
On 12 June 2012 18:53, Akash D <akashd(a)renuelectronics.com> wrote:
> Hello Michael,
>
> Thanks for reply.
>
> The required information is mentioned below.
>
> Compiler Used --->
>
> http://launchpad.net/gcc-arm-embedded
>
> Version number ---->
>
> arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors) 4.6.2 20110921
> (release) [ARM/embedded-4_6-branch revision 182083]
Yip, this is ARM's Cortex-R & M bare metal toolchain. It doesn't come
directly from Linaro but we've got a good relationship with them.
I'll ping them and see the best place to ask this question.
> The link file is attached with this mail.
I only had a quick read, but you're missing a capture for the
'.text.startup' section in the linker script. You might need
something like:
*(.text.startup)
before the one.o(.text) line or to change the *(.text) capture to
*(.text*). The startup section might need to be at a fixed address.
Please check your chip and toolchain documentation to confirm.
-- Michael
While benchmarking the auto-vectoriser on Libav, I noticed a performance
regression in gcc 4.7 (both FSF and Linaro) compared to gcc 4.6 in the AAC
decoder. I narrowed it down to this function:
static void ps_hybrid_analysis_ileave_c(float (*out)[32][2],
float L[2][38][64],
int i, int len)
{
int j;
for (; i < 64; i++) {
for (j = 0; j < len; j++) {
out[i][j][0] = L[0][j][i];
out[i][j][1] = L[1][j][i];
}
}
}
While gcc 4.6 does not attempt to vectorise this at all, 4.7 goes crazy
with a massive slowdown, about 20x slower than non-vectorised with Linaro
4.7 and much worse with FSF 4.7.
Let me know if you need more information.
--
Mans Rullgard / mru
