- linaro-toolchain - lists.linaro.org

by Peter Maydell

RAG: Red: Amber: Green: now only 6 "core ARM emulation" patches in qemu-linaro not yet upstreamed (still lots of omap3 patches, though) 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 == * some early prep for next week's qemu-linaro release == merge-correctness-fixes == * patch to fix Neon UNDEFs sent upstream and committed * patch fixing an overflow in signed VABAL.s32 upstreamed, committed * investigated a bug report which turns out to be that if you try to single step over an instruction which UNDEFs using qemu's gdb stub we execute the insn at the UNDEF vector and stop after it rather than stopping at the UNDEF vector * some investigation of qemu mishandling of FP exception flag setting; putting this on hold though, as it really isn't very high priority * reviewed patches from Aurelien doing some general softfloat cleanup == other == * trying to nail down proposed QEMU work for next cycle; work-in-progress: https://wiki.linaro.org/PeterMaydell/Qemu1111 * two IRC interviews for QEMU Google Summer of Code student to do some work on upstreaming of the Android emulator device models * meetings: toolchain, standup, architecture Q&A, divisional update 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, 4 months

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CoreMark Status

by Chung-Lin Tang

Hi, I've just pushed a merge of the current upstream patches for resolving the CoreMark regressions. (https://code.launchpad.net/~cltang/gcc-linaro/coremark-part1) To give a quick benchmark of the current status, testing Linaro 4.5 before/after the merge of those two patches: Optimization options used were just plain '-O2 -mtune=cortex-a9', tested on one of our Pandaboards running Maverick; all numbers are Iterations/Sec averaged from 3 runs. r99492 r9942+patches improve % -march=armv5te 2786.87 2848.12 2.20 % -march=armv7-a 2474.50 2775.92 12.18 % -march=armv7-a -mthumb 2297.86 2356.59 2.56 % I'll have to re-test to be sure, but the numbers/improvements obtained using upstream trunk should not be too far off, at least the ARM mode ones. As we discussed in prior meetings, there's still one point of regression identified that's in solving, which hopefully will finally bring the ARMv7-A numbers above ARMv5TE. Chung-Lin

14 years, 4 months

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[Activity] 10th - 14th April

by Revital Eres

Hello, - Tracking down bugs exposed while testing a patch for SMS to avoid using -fauto-inc-dec flag and preparing fixes for them. Also, prepared a fix for PR47013. - Continue looking into DENbench and updating https://wiki.linaro.org/Internal/ToolChain/Benchmarks. Thanks, Revital

14 years, 4 months

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[Activity] 11th - 14th April

by Ramana Radhakrishnan

== GCC == Progress: * Spent some time digging into binutils issue for Neon but still not sure why I see the problem when this is fixed in 2.21 branch and no one else see this. * Fixed PR 48090 upstream. * Some patch review. * T2 performance meeting. Plans when I'm back: * Continue looking at divmodsi4 improvements. * Continue looking at excessive VFP moves. * Backport the fix for the initialization of cgraph into FSF 4.5 branch. Meetings: * 1-1s * Linaro toolchain meeting * T2 performance. * Linaro@UDS meeting. Absences: * April 15 – 26 -> Booked. * May 9-14 - LDS Budapest

14 years, 4 months

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Issue with noreturn static function with unused arg

by Loïc Minier

hey This problem with busybox: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=621137 seems to be a toolchain issue. It occurs with FSF GCC 4.5.2 but not 4.6, and it doesn't occur with Linaro GCC 4.5 but it does with Debian gcc-4.5. I'm trying to identify the fix which Linaro applied to solve this! :-) Michael Hope told me he remembers we fixed something similar for Qt, but he couldn't find the patch and suggested I post here to get feedback. I've pushed ash.i and .s at: http://people.linaro.org/~lool/ash.i which you can build with: gcc -save-temps -std=gnu99 -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wdeclaration-after-statement -Wold-style-definition -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -g -Os -c -o ash2.o ash.i the interesting part is that ash.s has tryexec as not returning, when it does return: grep ^tryexec ash.s -A5 | grep return this seems to be due to the combination of tryexec being static, its parent being noreturn, and one argument of tryexec being unused. Any idea of which Linaro patch solved this? :-) Does it make sense to raise this to FSF GCC 4.5? Thanks! -- Loïc Minier

14 years, 4 months

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First toolchain estimate for the next cycle

by Michael Hope

Hi there. Mounir and I have been looking at the work for next cycle. A summary spreadsheet with notes is available here: https://spreadsheets0.google.com/ccc?key=ty1c-H56f0GxnL1Hk9LCmRg I'm very interested in feedback, especially on the time estimates and extra topics we should suggest to the TSC. See the notes at the top and feel free to add items or estimates straight into the sheet - anyone can view and anyone at Linaro should be able to edit. -- Michael

14 years, 4 months

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Differences in build hosts

by Michael Hope

Hi there. I ran a build of gcc-linaro-4.5+bzr99491 on ursa1 through 4 to see if there was any difference in build machines. The following tests had different results: * gcc.c-torture/compile/limits-structnest.c * gcc.dg/graphite/block-4.c * largefile.c * obj-c++.dg/template-5.mm * obj-c++.dg/template-5.mm * obj-c++.dg/template-6.mm * obj-c++.dg/template-6.mm * objc/execute/class-4.m I suspect that they're all caused by running the testsuite in parallel and the host running out of memory. limits-structnest takes around 850 MB of RAM and passes on the machine with swap (ursa1) and fails on the others. block-4.c takes 2:35 to run and timed out on ursa1 and passed on the others which may be due to ursa1 swapping heavily while running a limit test in parallel. The obj-c tests show various forms of killed, and suggest that they were killed due to another process taking all the memory. I'll change the machines to use the full 1 G of memory, run the test suite in sequential mode, and see how things go. I haven't investigated largefile.c - it's a PCH test and these fail randomly. Regarding block-4.c, it takes 155 s to run which is too close to the default 300 s for my taste. Should we add a dg-timeout-factor 4.0 to it similar to block-3.c? -- Michael

14 years, 4 months

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[Activity] April 4th - 8th

by Ramana Radhakrishnan

Missed sending this out earlier this week. == GCC == Progress: * Sync'd with Andrew about T2 performance stuff. * Spent some time investigating what could be done for divmodsi4 improvements . Working through the various phases. Not done tree level stuff for a while so my knowledge of the API is a a bit rusty. * Some upstream bugzilla duty. Plans: * Continue looking at divmodsi4 improvements. * Continue looking at excessive VFP moves. * Look at binutils + neon issue. * Performance kick-off meeting Meetings: * 1-1s * Linaro toolchain meeting * Andrew Stubbs meeting for 1 hour about T2 performance. Absences: * April 13th - Internal ARM conference. Not at desk all day. * April 15 – 26 -> Booked. * May 9-14 - LDS Budapest

14 years, 4 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind: * started to look on how to resume from a given stack frame: * other platforms use setcontext * setcontext is not implemented on ARM (glibc) * the *context functions have been marked obsolescent in Posix * http://pubs.opengroup.org/onlinepubs/009695399/functions/makecontext.html pandaboard: * gdb doesn't find separate debug info of libraries that have been put into a multiarch directory (#758619) Note: I'll be out of office to attend a class till (including) Friday. Regards Ken

14 years, 4 months

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Today's T2 perf call.

by Ramana Radhakrishnan

A rough agenda for today's call. I'll put this on the wiki after the call. 1. Go over what we are all doing today - roughly Areas of investigation that we are looking at for near term. a. divmodsi4 work. b. Unnecessary VFP to integer register moves because of addressing modes availability. c. Thumb2 constants work d. Additional areas for headroom in DENBENCH. e. Coremark regressions fix up f. Revisions causing major regressions in coremark 2. Find a way of replicating the benchmarking results and make sure we get similar results to Michael and we are doing roughly the same thing. 3. Regular bi-weekly call following the Toolchain WG meeting ? Or do we organize another call ?

14 years, 4 months

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[Bug 758082] [NEW] [armel] segfaults in make check pass when built with optimization

by Jani Monoses

Public bug reported: FTBFS on armel https://launchpadlibrarian.net/68239668/buildlog_ubuntu-natty-armel.augeas_… not apparent from the log but the failing of test-interpreter.sh is due to a core dump. Starting program: /home/jani/work/ftbfs/aug/augeas-0.8.0/src/.libs/lt- augparse --nostdinc -I . fail_let_no_exp.aug Program received signal SIGSEGV, Segmentation fault. strlen () at ../ports/sysdeps/arm/strlen.S:29 29 ../ports/sysdeps/arm/strlen.S: No such file or directory. in ../ports/sysdeps/arm/strlen.S (gdb) bt #0 strlen () at ../ports/sysdeps/arm/strlen.S:29 #1 0x4016c050 in _IO_vfprintf_internal (s=<value optimized out>, format=<value optimized out>, ap=<value optimized out>) at vfprintf.c:1620 #2 0x401d7b66 in __vasprintf_chk (result_ptr=0xbee5097c, flags=1, format=0x400d961c "%s", args=...) at vasprintf_chk.c:68 #3 0x400bfad6 in vasprintf (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at /usr/include/bits/stdio2.h:199 #4 format_error (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at syntax.c:96 #5 0x400bfd98 in syntax_error (info=0x1, format=0x400d961c "%s") at syntax.c:124 #6 0x400c3e96 in augl_error (locp=<value optimized out>, term=<value optimized out>, scanner=<value optimized out>, s=0x400d7abc "syntax error") at parser.y:628 #7 0x400c54f8 in augl_parse_file (aug=0x1ef1878, name=<value optimized out>, term=0xbee50a64) at parser.y:362 #8 0x400c153a in load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at syntax.c:1951 #9 0x400bbf0a in __aug_load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at augeas.c:1447 #10 0x00008b04 in main (argc=<value optimized out>, argv=0xbee50c84) at augparse.c:131 ** Affects: gcc-linaro Importance: Undecided Status: New ** Affects: augeas (Ubuntu) Importance: Undecided Status: New ** Tags: arm-porting-queue ** Also affects: gcc-linaro Importance: Undecided Status: New ** Summary changed: - segfaults in make check pass when built with optimization + [armel] segfaults in make check pass when built with optimization ** Tags added: arm-porting-queue -- You received this bug notification because you are a member of Linaro Toolchain Developers, which is subscribed to Linaro GCC. https://bugs.launchpad.net/bugs/758082 Title: [armel] segfaults in make check pass when built with optimization Status in Linaro GCC: New Status in “augeas” package in Ubuntu: New Bug description: FTBFS on armel https://launchpadlibrarian.net/68239668/buildlog_ubuntu-natty-armel.augeas_… not apparent from the log but the failing of test-interpreter.sh is due to a core dump. Starting program: /home/jani/work/ftbfs/aug/augeas-0.8.0/src/.libs/lt- augparse --nostdinc -I . fail_let_no_exp.aug Program received signal SIGSEGV, Segmentation fault. strlen () at ../ports/sysdeps/arm/strlen.S:29 29 ../ports/sysdeps/arm/strlen.S: No such file or directory. in ../ports/sysdeps/arm/strlen.S (gdb) bt #0 strlen () at ../ports/sysdeps/arm/strlen.S:29 #1 0x4016c050 in _IO_vfprintf_internal (s=<value optimized out>, format=<value optimized out>, ap=<value optimized out>) at vfprintf.c:1620 #2 0x401d7b66 in __vasprintf_chk (result_ptr=0xbee5097c, flags=1, format=0x400d961c "%s", args=...) at vasprintf_chk.c:68 #3 0x400bfad6 in vasprintf (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at /usr/include/bits/stdio2.h:199 #4 format_error (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at syntax.c:96 #5 0x400bfd98 in syntax_error (info=0x1, format=0x400d961c "%s") at syntax.c:124 #6 0x400c3e96 in augl_error (locp=<value optimized out>, term=<value optimized out>, scanner=<value optimized out>, s=0x400d7abc "syntax error") at parser.y:628 #7 0x400c54f8 in augl_parse_file (aug=0x1ef1878, name=<value optimized out>, term=0xbee50a64) at parser.y:362 #8 0x400c153a in load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at syntax.c:1951 #9 0x400bbf0a in __aug_load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at augeas.c:1447 #10 0x00008b04 in main (argc=<value optimized out>, argv=0xbee50c84) at augparse.c:131

14 years, 4 months

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Conference code for today's Thumb-2 kick off call

by Michael Hope

Hi everyone. The conference code for today's call is 5238686884. The dial in numbers are the same as the weekly meeting. See: http://wiki.linaro.org/WorkingGroups/ToolChain/Meetings -- Michael

14 years, 4 months

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[Bug 757427] [NEW] gconftool-2 segfaults on arm

by Jani Monoses

Public bug reported: The 2.32.2 upload of gconf is likely miscompiled and segfaults. This leads to other armel FTBFSs in the archive when calling gconftool-2 as part of the install phase. ** Affects: gcc-linaro Importance: Undecided Status: New ** Affects: gconf (Ubuntu) Importance: Undecided Status: New ** Tags: arm-porting-queue ** Package changed: ubuntu => gconf (Ubuntu) ** Also affects: gcc-linaro Importance: Undecided Status: New -- You received this bug notification because you are a member of Linaro Toolchain Developers, which is subscribed to Linaro GCC. https://bugs.launchpad.net/bugs/757427 Title: gconftool-2 segfaults on arm Status in Linaro GCC: New Status in “gconf” package in Ubuntu: New Bug description: The 2.32.2 upload of gconf is likely miscompiled and segfaults. This leads to other armel FTBFSs in the archive when calling gconftool-2 as part of the install phase.

14 years, 4 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== Last week == * Sent a fix for PR target/46329 upstream. * Discussed with Richard Guenther how to represent the interleaved load/store "functions" that we're adding to gimple. Sent a patch upstream for comments. Richard confirmed on IRC that he was happy with it, and no-one else has objected. * Spent most of the week on the vectorisation itself, and on the testsuite. == This week == * Finish work on vectorisation testsuite and submit. Richard

14 years, 4 months

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[ACTIVITY] Apr.04 -- Apr.10

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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 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, 4 months

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