== GCC ==
* Implemented patch to prevent lower-subreg pass from splitting
pseudo register moves during first pass. Committed to mainline.
* Updated patch to perform 64-bit integer shifts in NEON registers
to avoid NEON single to NEON double register hazard. Re-started
testing via Launchpad branch neon-shifts-4.7-v3.
* Rebased patch to improve 32-to-64-bit extended from core into
NEON registers, added backport of lower-subreg mainline fix.
New Launchpad branch neon-extendsidi-4.7-v3.
* Tested reload patch to fix aarch64 find_reloads_subreg_address
bug on multiple platforms to prepare for mainline.
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
== Progress ==
* builtin_bswap16:
* patch to catch (x<<8)|<x>>8) committed upstream after confirmation
it was OK by PowerPC guys.
* backporting of builtin_bswap16 for ARM to Linaro/4.7: one of the
tests fails. Trying to isolate the trunk change that would make is
pass.
* useful discussions with Ulrich to investigate if we could avoid
generating useless zero-extensions after rev16. I still need to
experiment.
* PGO/hot-cold partitioning:
* applied info from Matt, I have now a usable Spec2000 setup based
on qemu.
== Next ==
* builtin_bswap16:
* try to avoid useless zero-extensions.
* PGO/hot-cold partitioning:
* investigate runtime failures.
* run on a Snowball board.
== Progress ==
* 4.7 AArch64 merge into gcc-linaro/4.7
* Got Foundation model working
* Ran testsuite - results OK - some obvious infrastructure issues though
* Hot/Cold partitioning in PGO:
* Posted second patch upstream
* Had basic flaw with it pointed out (shame was the flaw fixed the issue)
* Admin
* Interviewing
== Next Week ==
* Start of month branch merges.
* HOT/COLD partitioning for PGO:
* Get two current patches accepted upstream
* Post question upstream about register allocation 'mistakes' I am seeing
* ARM/aarch64-4.7-branch merge into gcc-linaro/4.7.
* Investigate failure in testsuite run
* Check that I am merging the svn branches correctly.
* Participate in sprint
* symbol_ref splitting
* Test code alignment hypothesis
* Test v2 patch.
== Future ==
* Look at Cards for Vectorization, PGO and LTO with Michael.
--
Matthew Gretton-Dann
Linaro Toolchain Working Group
matthew.gretton-dann(a)linaro.org
(two week rollup report since week 38 was a short week for me)
Current Milestones:
|| || Planned || Estimate || Actual ||
|| clean up kvm-qemu cp i/f || 2012-09-20 || 2012-09-20 || ||
|| fake-trustzone || 2012-10-15 || 2012-10-15 || ||
Also planned: general keeping up with kernel changes; upstream patch
review; qemu-linaro releases. May change dates to align with overall
KVM plan for the quarter when that is finalised.
Previous Milestones:
||cp15-rework || 2012-01-06 || 2012-06-23 || 2012-06-24 ||
||a15-lpae-support || 2012-07-13 || 2012-07-20 || 2012-07-20 ||
== other ==
* looked briefly at the result of running the clang static analyzer
over QEMU
* wrote some fixes to totally broken code in the ds1338 model as
result
* reviewed some nice TCG optimisation patches from Aurelien which bump
up performance for ARM guests by 10-15%
* reviewed, bugfixed and committed some patches for the bootwrapper
from Dave Martin
* removed obsolete SMC API support from bootwrapper (lets us knock
the final item off a blueprint)
* implemented the new movcond TCG IR insn in the ARM backend
KVM blueprint progress tracker:
http://ex.seabright.co.nz/helpers/backlog?group_by=topic&colour_by=state&pr…
-- PMM
Summary:
* Validate and release Linaro binary toolchain 2012.09
* Identify the root cause of dwarf check fail in native build when
enabling shrink-wrap.
Details:
1. Validate and release Linaro binary toolchain 2012.09.
2. Analyze the dwarf check fail in native build when enabling shrink-wrap:
* Root cause: tail calls from simple-return path and normal return
path are optimized as one common tail call.
* To fix it, use simple-return to indicate the one from simple-return
path, which will block the optimization to mix them.
Plans:
* Test shrink-wrap performance.
Planed leaves:
* Sept. 30 - Oct. 7: Mid-Autumn Festival and National Day of China's holiday.
Best regards!
-Zhenqiang
Hi,
I am using Linaro Toolchain for compiling UEFI and I am getting alignment
fault as exception while running UEFI on Origen Board.
When I was using other cross compilers the issue was not there.
The crash report is as follows:
Data Abort Exception PC at 0x4F84DCDC CPSR 0x60000133 nZCveAifT_svc
/home/shiva/workspace/armserver/uefi_origen/edk2/Build/OrigenBoard-Exynos/DEBUG_ARMLINUXGCC/ARM/FatPkg/EnhancedFatDxe/Fat/DEBUG/Fat.dll
loaded at 0x4F84D000 (PE/COFF offset) 0xCDC (ELF or Mach-O offset) 0xA9C
0xF8BD6037 LDRH r6, [sp, #0x37]
R0 0x0000000B R1 0x0000000A R2 0x4FCEEAD8 R3 0x80000000
R4 0x4F836010 R5 0x4F863619 R6 0x00000000 R7 0x4F837F10
R8 0xFFFFFFFF R9 0x00000000 R10 0x00000001 R11 0x00000000
R12 0x00000000 SP 0x4FCEEA20 LR 0x4F84DCDD PC 0x4F84DCDC
DFSR 0x00000001 DFAR 0x4FCEEB17 IFSR 0x0000140B IFAR 0x00910883
Alignment fault: read from 0x4FCEEB17
Instruction Domain fault on Page at 0x00910883
ASSERT
/home/shiva/workspace/armserver/uefi_origen/edk2/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandler.c(304):
((BOOLEAN)(0==1))
--
Thanks and Regards,
Shiva.
Interested in working with us on improving the performance of Linux on
ARM? We’re looking for motivated engineers to work in our toolchain
team on compiler technology, developer tools, and low level
performance libraries. You will use your specialised knowledge to work
in the open, work upstream, and make ARM flavoured improvements to a
range of tools that are fundamental to making the latest mobile and
server products.
We’re currently looking for:
* GCC developers
* Developer tools engineers, especially on the GNU tools like binutils and GDB
* ARM performance engineers, to work on a range of low level libraries
We’re a distributed team. Working from the home office is an option.
Please see the careers page on our website for more information and
how to contact us.
-- Michael
== GCC ==
* Committed patch to use vld1.64/vst1.64 instead of vldm/vstm
to GCC mainline and Linaro GCC 4.7
* Committed patch to use vld1/vst1 to implement vec_set/vec_extract
to GCC mainline and Linaro GCC 4.7
* Posted patch to perform 64-bit integer shifts in NEON registers
for mainline inclusion. Started to address review comments.
* Rebased patch to improve 32-to-64-bit extends from core
into NEON registers; ran into lower-subreg regression.
* Worked on implementing fix for lower-subreg regression.
* Handed over (Richard's) auto-inc-dec patches to Matt.
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 2012.09
release of the Linaro Toolchain Binaries, a pre-built version of
Linaro GCC and Linaro GDB that runs on generic Linux or Windows and
targets the glibc Linaro Evaluation Build.
Uses include:
* Cross compiling ARM applications from your laptop
* Remote debugging
* Build the Linux kernel for your board
What's included:
* Linaro GCC 4.7 2012.09
* Linaro GDB 7.5 2012.09
* A statically linked gdbserver
* A system root
* Manuals under share/doc/
The system root contains the basic header files and libraries to link
your programs against.
Interesting changes include:
* gdbserver is stripped.
* gdbtui is replaced by "gdb --tui"
The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian
6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation
5.7 and later, and should run on any Linux Standard Base 3.0
compatible distribution. Please see the README about running on
x86_64 hosts.
The Windows version is supported on Windows XP Pro SP3, Windows Vista
Business SP2, and Windows 7 Pro SP1.
The binaries and build scripts are available from:
https://launchpad.net/linaro-toolchain-binaries/trunk/2012.09
Need help? Ask a question on https://ask.linaro.org/
Already on Launchpad? Submit a bug at
https://bugs.launchpad.net/linaro-toolchain-binaries
On IRC? See us on #linaro on Freenode.
Other ways that you can contact us or get involved are listed at
https://wiki.linaro.org/GettingInvolved.
Summary
* Prepare Linaro binary toolchain 2012.09 release
* Fix lp:1036170/pr50970
Details:
1. Prepare Linaro binary toolchain 2012.09 release
* Update linaro gcc and gdb to 2012.09 release
* Workaround gdb lsb build issue.
* Strip gdbserver.
* Smoke tests.
2. Merge shrink-wrap patch to lp:gcc for cbuild test. But dwarf checks
fail when building fortan related codes at stage 2.
3. Identify the root cause of lp:1036170/pr50970 and work out a patch to fix it.
Plans:
* Linaro binary toolchain 2012.09 release.
* Fix shrink-wrap build fail issues.
Planed leaves:
* Sept. 30 - Oct. 7: Mid-Autumn Festival and National Day of China's holiday.
Best regards!
-Zhenqiang
