- linaro-toolchain - lists.linaro.org

by Chung-Lin Tang

== Last week == * Mon/Tue (Apr.4--5): Tomb-sweeping Day, public holiday. * PR48250 / CS Issue #9845 / Launchpad #723185. Unaligned DImode reload under NEON. Worked on new patch, submitted to gcc-patches after testing on Friday. Awaiting review. == This week == * CoreMark ARMv6/v7 regressions: working on new combine patch.

14 years, 6 months

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[ACTIVITY] 4th - 9th April

by Andrew Stubbs

The test results for the patch for lp:675347 on GCC 4.6 came back clean, so I merged it to Linaro GCC 4.6. The test results for lp:675347 on 4.5 had problems though, but they might be unrelated to the patch. The test results for the "discourage NEON on A8" patch had similar failures, and that's a 4.6 testsuite. Richard Earnshaw approved the Thumb register allocation patch. I've committed it upstream, and updated the patch trackers. It was already on the Linaro 4.6 branch. Now that GCC 4.6 is released, switched all the Linaro tracking tickets from 'Fix committed' to 'Fix released'. Merged from FSF 4.5 to Linaro 4.5 and submitted the patch for test. The tests came back clean, so I pushed it to the 4.5 branch. (Yay for Michael's new test service!) Merged more patches from SG++ to Linaro. Or, at least considered them for merge. Mostly I decided that they were not appropriate for Linaro, at least, not just yet. I have yet to push these patches to Launchpad. Reviewed Richard Sandiford's patch for LP:714921. Retried the Android build with a view to integrating Android support in Linaro GCC 4.5 (4.6 should already support it). Eventually, after downloading many different git repositories and branches, and maxing out the memory on my machine a few times, I managed a successful build using the toolchain the Android team are using. I then backported Maxim's patches to Linaro GCC 4.5, and built and tested that, and got another successful Android build. I've pushed the patched toolchain to Launchpad at lp:~ams-codesourcery/gcc-linaro/android for testing. All being well, I'll merge Android support into the 4.5 trunk in time for the next release. ---- Upstream patched requiring review: * Thumb2 constants: http://gcc.gnu.org/ml/gcc-patches/2010-12/msg00652.html * ARM EABI half-precision functions http://gcc.gnu.org/ml/gcc-patches/2011-02/msg00874.html * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 6 months

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[ACTIVITY] 2011-04-08

by David Gilbert

- Back from holiday, short week. == Porting jam == * We seem to have picked up a lot of ftbfs in the last couple of weeks - which is unfortunate because it may well be too close to the Natty release to do anything about them * Bug 745843 is a repeatable segfault in part of the build process of a package called vtk that is used by a few other things ; I've got this down to a particular call of one function - although gdb is getting rather confused (r0 & r1 changing as I single step across a branch) * Bug 745861 petsc build failure; I'm getting one of two different link errors depending which mood it is in - mpi related? * Bug 745873 - a meta package that just didn't have a list of packages to build with for armel; easy to do a simple fix (provided branch that built) for but the maintainer says it's too late for natty anyway and some more thought is needed. == Other == * Reading over some optimisation documents * Tested weekly release on Beagle-c4 (still no OTG usb and hence no networking for me) * Also simple boot test on panda; not much time for more thorough test. (seems to work) Dave

14 years, 6 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, == libunwind == * created a generic and local variant of the extbl parser * continued to look into testsuite failures * down to 12 failures: https://wiki.linaro.org/KenWerner/Sandbox/libunwind * continue to post patches upsteam Note: I'll be out of office to attend a class starting from Wednesday till Friday next week. Regards Ken

14 years, 6 months

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[ACTIVITY] report week 14

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | == maintain-beagle-models == * I spent a couple of days on initial cleanup of the omap3 patchstack in qemu-linaro. It's still some way from being upstreamable but at least now every patch in the stack compiles; this should make rebasing on upstream a bit less painful. * the board-ram-limits patchset is still stalled with upstream :-( == merge-correctness-fixes == * Aurelien applied lots of patches so the pipeline has drained again * cleaning up/reworking patches which fix handling of Neon UNDEF cases. Not very exciting but it will get a large set of patches out of the qemu-linaro patchstack. == other == * meetings: toolchain, standup Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: Holiday: 22 Apr - 2 May 9-13 May: UDS, Budapest (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 6 months

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[Merge] lp:~rsandifo/gcc-linaro/lp-714921-4.5 into lp:gcc-linaro

by noreply＠launchpad.net

The proposal to merge lp:~rsandifo/gcc-linaro/lp-714921-4.5 into lp:gcc-linaro has been updated. Status: Needs review => Merged For more details, see: https://code.launchpad.net/~rsandifo/gcc-linaro/lp-714921-4.5/+merge/56525 -- https://code.launchpad.net/~rsandifo/gcc-linaro/lp-714921-4.5/+merge/56525 Your team Linaro Toolchain Developers is subscribed to branch lp:gcc-linaro.

14 years, 6 months

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Launchpad: Validate your team's contact email address

by Launchpad Email Validator

Hello The Launchpad user named 'Michael Hope (michaelh1)' requested the registration of 'linaro-toolchain(a)lists.linaro.org' as the contact email address of team 'Linaro Toolchain Developers'. This request can only be made by a team owner/administrator, so if this change request was unexpected or was not requested by one of the team's administrators, please contact system-error(a)launchpad.net. If you want to make this email address the contact email of 'Linaro Toolchain Developers', please click on the link below and follow the instructions. https://launchpad.net/token/6sQQKQ6kx3XP9MlWMwmX Thanks, The Launchpad Team

14 years, 6 months

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New porter boxes

by Michael Hope

Hi there. The new porter boxes are now available for use. See: https://wiki.linaro.org/WorkingGroups/ToolChain/Hardware for details. These are PandaBoards with 768 MB of memory, a USB HDD, and a good internet connection. They can be used for day to day jobs like building programs, triaging bugs, and running benchmarks. Use dchroot natty to switch into the chroot. Use sudo apt-get install yyy to install packages. The build dependences for GCC, GDB, and binutils should already be installed. -- Michael

14 years, 6 months

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[ACTIVITY] April 3-7

by Ira Rosen

Hi, * continued bringing patches upstream - changing default vector size to 128 - resubmitted with changes according to comments, awaiting review - if-conversion improvement - committed * PR 48252 - bug in vzip/vuzp/vtrn implementation - patch submitted * opened PR 48454 - a test failure with -mvectorize-with-neon-quad Next week - vacation. April 18-27 - Passover Holiday, I'll only work half days on April 18 and April 24. And possibly half days on April 20 and 21. Ira

14 years, 6 months

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Tegra2 errata bug

by David Gilbert

https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/739374 is the bug relating to the Tegra errata mentioned today. Dave

14 years, 6 months

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[ACTIVITY] Apr 04 - Apr 06

by Ulrich Weigand

== GDB == * Ongoing work to fix single-stepping over signal handlers (bug #615978). * Posted patch to support NEON registers in core files (bug #615972). * Failure to disable address space randomization (bug #616001) is shown to be a kernel problem; created stand-alone test case and opened bug against kernel team. == Schedule == * On vacation 04/07 - 04/15. 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

14 years, 6 months

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Re: Linaro 4.5.2 v. CodeSourcery 4.5.1

by Andrew Stubbs

On 25/03/11 21:48, Diane Holt wrote: > I hope you don't mind me sending you mail, but I'm a bit stuck...I've > been told I need the Linaro 4.5.2 toolchain because it has some "neon > optimizations" that the CS 4.5.1 doesn't have. In general, you'd be better addressing these questions on the Linaro Toolchain mailing list: linaro-toolchain(a)lists.linaro.org (I've copied it in). Not least because I'm on vacation for the next week. :) > Unfortunately, the Linaro > 4.5.2 that's available for download (already built) won't work in my > Scratchbox environment, since it was compiled against a glibc that's too > new. The CS 4.5.1 works fine -- but I'm not allowed to use it, because > of the neon stuff. The CS and Linaro compilers are really very similar, but CodeSourcery has not made a release since the autumn, so Linaro will have some extra features. > Do you know whether CS actually does have (or will have) the same neon > optimizations Linaro has? It depends which optimizations you are referring to? The existing CS release had the latest improvements at the time it was released, and I believe that the upcoming release will probably be very similar to Linaro (at least, with respect to ARMv7 - there'll be many differences for other architecture variants), but I'm not promising that. Sorry if that's a bit vague, but I the contents of the next CS release is still not finalised. > If it doesn't (and won't), then I'm going to have to build the Linaro > one from source. Unfortunately, I've not been able to find any detailed > information on how to go about doing that. Do you know if that's > documented anywhere? Are you talking about building native compiler, or a cross-compiler? The former is very simple (provided you have all the dependencies), while the latter is more involved. Here's the recipe to build a native compiler: tar xf gcc-linaro.....tar.bz2 mkdir objdir cd objdir ../gcc-linaro....../configure --prefix=<your-install-path> <opts> make bootstrap make install You can copy the configure <opts> from another compiler using 'gcc -v' and './configure --help' in the source tree should tell you what they mean. If you want to build a cross compiler, I suggest you look at crosstool or crosstool-ng, or OpenEmbedded. Building cross-toolchains is non-trivial. Hope that helps. Andrew

14 years, 6 months

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CoreMark over releases

by Michael Hope

Here's some pretty pictures of the relative CoreMark performance on a Cortex-A9. Note that in accordance with the CoreMark rules, all results are estimates. Linaro GCC 4.5 and mainline GCC vs 4.5.2: http://people.linaro.org/~michaelh/incoming/all-o3-vs-gcc-4.5.2.png Linaro GCC 4.5 releases vs our first: http://people.linaro.org/~michaelh/incoming/releases-o3-vs-gcc-linaro-4.5-2… Linaro GCC 4.5 builds between 2010.08 and 2010.10: http://people.linaro.org/~michaelh/incoming/releases-o3-vs-gcc-linaro-4.5-2… The 2.5 % drop in performance for 2010.09 is probably due to r99379. The further 2 % drop in 2010.10 is due to re-syncing with mainline 4.5.2. Performance has been moving solidly upwards but it has to start from the -4.5 % from these two updates. Chung Lin's unsigned extension changes should be interesting... -- Michael

14 years, 6 months

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Linaro toolchain integration with ChromiumOS build

by PANKAJ KUMAR DUBEY

14 years, 6 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== Last week == * Finished the patch that I was working on last week to use memory operands rather than register operands in neon.md. Submitted upstream: http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01996.html Among other things, this allows the intrinsics to use post-modified addresses. * Submitted patches to make the number of rtl generator arguments (as opposed to insn operands) available to the expand-time code: http://gcc.gnu.org/ml/gcc-patches/2011-03/msg02227.html http://gcc.gnu.org/ml/gcc-patches/2011-03/msg02228.html http://gcc.gnu.org/ml/gcc-patches/2011-03/msg02229.html This is part of the tree-rtl expansion "cleanups" that I've been doing in preparation for the vectoriser work. * More discussion about the handling of type modes vs. per-function target switching. I've think we've agreed what the right approach is, although it's probably outside the scope of this project. The discussion was still useful because it meant I could submit & defend the next patch. * Submitted a patch to use non-BLK modes for arrays of vectors (like uint32x2x2_t & co. in arm_neon.h); http://gcc.gnu.org/ml/gcc-patches/2011-03/msg02192.html This avoids that stack spilling that was discussed during the week. Richard Guenther seemed happy with the patch in principle, but understandably wanted to see how the optabs stuff worked out first. Also, the testcase he asked me to try exposed another instance of: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46329 so that needs to be fixed first. * Started writing & testing a fix for that PR (46329). == This week == * Finish fix for PR46329. * More vld & vst stuff. Richard

14 years, 6 months

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[ACTIVITY] Mar.28 -- Apr.03

by Chung-Lin Tang

== Last week == * PR48250 / CS Issue #9845 / Launchpad #723185. Unaligned DImode reload under NEON. Went back and forth with Richard Earnshaw on gcc-patches for most of the week. The issues should finally be clear, and I think it would be better to modify the significant parts of arm_legitimize_reload_address() to do the right thing rather than just fixing the bug. I have a new patch done over the weekend, though it still shows a few regressions after some testing. I hope this gets done by this week... * PR48325 / Launchpad #744754, another NEON ICE in postreload. This appears to be the IA/DB modes for VLDM/VSTM for NEON struct modes were not enabled. This ICE actually does not happen currently on upstream trunk, but sent patch anyways. Pending review. * Spent some time on Launchpad #736661 (C++ ICE in expr.c), and looked at upstream testsuite regressions of gcc.dg/pr17957.c and gcc.dg/torture/pr47975.c under -mfpu=neon (ICE on OImode const0_rtx assignment). * Call with Ramana on ARM optimization work. == This week == * Get PR48250/Launchpad #723185 nailed. * Other pending GCC issues. * TW Public Holiday, Mon. and Tue. (Apr.4-5)

14 years, 6 months

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Improvements to bzr

by Michael Hope

The Bazaar team have been working on improving the performance of bzr on the gcc-linaro tree. Here's how long the steps take on my machine with the current 2.4 development version: Update tip before branching: bzr pull 20.4 s (no revisions) Make the branch: bzr branch --hardlink 4.5 optspace 26.8 s Do some work and commit it: ...change two files bzr status 1:05 (again) bzr status 1.7 s bzr commit . 3.6 s Push the changes up: bzr push lp:~michaelh1/gcc-linaro/optspace 3:47 ~9 MB (~40 kB/s which is saturating my uplink) Later, the merge master pulls the branch down and merges: bzr branch --no-tree lp:~michaelh1/gcc-linaro/optspace 36 s ~900 k bzr merge ../optspace 3:26 The bzr status and bzr commit are quite good. I've asked them to look into bzr merge. -- Michael

14 years, 6 months

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can linaro toolchain compile ARM earlier than Cortex A8?

by Barry Song

Hi All, After downloading linaro toolchain by apt-get in ubuntu, I compiled the uboot for ARM1136 SoC with -march=armv5 option. And it can compile successfully. Then I let the uboot run on target boards and system failed due to "undefined instructions". Checked linaro toolchain options, it is: #arm-linux-gnueabi-gcc -v Using built-in specs. COLLECT_GCC=arm-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabi/4.5.2/lto-wrapper Target: arm-linux-gnueabi Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.5.2-5ubuntu2~ppa1' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/arm-linux-gnueabi/include/c++/4.5.2 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld=ld.gold --enable-objc-gc --disable-sjlj-exceptions --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabi --with-headers=/usr/arm-linux-gnueabi/include --with-libs=/usr/arm-linux-gnueabi/lib Thread model: posix gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-5ubuntu2~ppa1) The imporant options are "--with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16". I just want to ask whether these options stop arm-linux-gnueabi-gcc to support old arch? If so, according to gcc documents at http://gcc.gnu.org/install/configure.html, " --with-cpu=cpu --with-cpu-32=cpu --with-cpu-64=cpu Specify which cpu variant the compiler should generate code for by default. cpu will be used as the default value of the -mcpu= switch. This option is only supported on some targets, including ARM, i386, M68k, PowerPC, and SPARC. The --with-cpu-32 and --with-cpu-64 options specify separate default CPUs for 32-bit and 64-bit modes; these options are only supported for i386, x86-64 and PowerPC. --with-schedule=cpu --with-arch=cpu --with-arch-32=cpu --with-arch-64=cpu --with-tune=cpu --with-tune-32=cpu --with-tune-64=cpu --with-abi=abi --with-fpu=type --with-float=type These configure options provide default values for the -mschedule=, -march=, -mtune=, -mabi=, and -mfpu= options and for -mhard-float or -msoft-float. As with --with-cpu, which switches will be accepted and acceptable values of the arguments depend on the target. " There are only default values for later compiling. Users should be able to swith to other values by setting other options. But why did arm-linux-gnueabi-gcc still build "undefined instructions" to arm1136 with "arch=armv5"? In fact arm1136 is armv6. Then i compiled a toolchain for linaro gcc-linaro-4.4-2011.02-0 codes by myself, the options are simple: #arm-none-linux-gnueabi-gcc -v Using built-in specs. Target: arm-none-linux-gnueabi Configured with: ../gcc-linaro-4.4-2011.02-0/configure --target=arm-none-linux-gnueabi --prefix=/home/vmuser/development/toolchain/build-toolchain/tools --enable-languages=c,c++ --disable-libgomp Thread model: posix gcc version 4.4.5 (Linaro GCC 4.4-2011.02-0) Then I compiled uboot by this toolchain again, the uboot can work. Then why can the toolchain compiled by myself support more arch? And what performance is lost in my compiling? Thanks Barry

14 years, 6 months

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[Activity] March 28 - April 1

by Ramana Radhakrishnan

== GCC == Progress: * Investigated excessive VFP moves . Partially investigating ways forward. * Polished up my divmodsi4 patch. Discussed it during the call. Looking for ways to do it properly at the tree level. * Got Panda board on Friday. * Off on Wednesday. * Conversations with Revital and Chung-Lin. Need to sync up with Andrew next week. * Found an issue with binutils and Neon and this is now LP:747837 Plans: * Continue looking at excessive VFP moves. * Finish working through Thumb2 speed tickets. * Set up new Panda board. * Conversation with Andrew sometime this week. Meetings: * 1-1s * Linaro toolchain meeting Absences: * April 15 – 26 -> Booked Holiday. * May 9-14 - LDS Budapest

14 years, 6 months

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[ACTIVITY] Mar 28 - Apr 01

by Ulrich Weigand

== GDB == * Committed patch to fix single-stepping across bad ARM/Thumb boundary (bug #667309) to mainline and Linaro GDB. * Committed patch to fix accessing "fpscr" register to mainline. * Ongoing work to fix single-stepping over signal handlers (bug #615978). Posted yet another updated patch to gdb-patches for comments. * Implemented patch to support NEON registers in core files (bug #615972). * Investigated failure to disable address space randomization (bug #616001). 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

14 years, 6 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, == pandaboard == * noticed that hw perf events are not working on 2.6.38-1001-linaro-omap * it seems that the omap kernel has not configured its PMU properly * perf_event_open syscall returns ENODEV * started discussion with agreen (#744458) * noticed that natty puts its glibc into a multilib path * prevents linaro gcc (and upstream) from being built == libunwind == * created a generic and local variant of the extbl parser * ran the test suite a few times using different unwind methods * started to look into the test suite failures * started to fix a couple of the failures on ARM Regards Ken

14 years, 6 months

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[ACTIVITY] report week 13

by Peter Maydell

RAG: Red: Amber: Green: the aircon has been fixed; blessed quiet again Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | == maintain-beagle-models == * the board-ram-limits patchset has been expanded significantly to address upstream suggestions; it now includes a lot of refactoring of sun4m (sparc) board code to use the new generic max-ram functionality instead of a sun4m-specific bit of code. Unfortunately there is still some pushback upstream on the grounds that a simple max-ram limit doesn't cater for complicated NUMA situations :-( == merge-correctness-fixes == * working on moving implementation of VLD/VST "multiple structures" forms into qemu helper functions; the current implementation is correct but can expand to hundreds of TCG ops which is well beyond the maximum permitted value, so could potentially overrun a TCG buffer == other == * wrote up some technical/engineering input into what we ought to be doing with qemu next cycle * review of a patch by Dmitry Eremin-Solenikov adding ARMv4/v4T support * some review of s390 TCG patches (not because we have a direct interest in s390 but as part of being a good citizen upstream) * sent a pull request for some neon patches that had been on the list a few weeks; hopefully this will help drain the patch pipeline * meetings: toolchain, standup, pdsw-tools Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: Holiday: 22 Apr - 2 May 9-13 May: UDS, Budapest (maybe) ~17-19 August: QEMU/KVM strand at LinuxCon NA, Vancouver

14 years, 6 months

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[ACTIVITY] March 27-31

by Revital Eres

Hello, * Submitted merge requests for SMS patch to gcc-linaro and gcc-linaro/4.6. * Testing SMS patch which extends the current implementation to consider loops that contain instructions with REG_INC_NOTE. * Filed PRs 48336 48380 for recent fails of trunk on ARM. * Had a chat with Ramana about the DENbench benchmarks, directions and findings. * Filed PR 745743 in linaro gcc-bugzilla Thanks, Revital

14 years, 6 months

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[ACTIVITY] March 27-31

by Ira Rosen

Hi, * continued bringing patches upstream - auto-detection of vector size - committed - changing default vector size to 128 - submitted and testing the final version - if-conversion improvement - submitted and now testing the final version * gcc-linaro-4.6 - submitted a merge request for store sink patch (this patch is already upstream) Ira

14 years, 6 months

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Stand up call

by Michael Hope

Hi there. Just a reminder that the standup call is now at 0900 UTC on Thursdays. The first is in about half an hour. -- Michael

14 years, 6 months

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