linaro-toolchain

linaro-toolchain@lists.linaro.org

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5573 discussions

by Ramana Radhakrishnan

(This is a combined report having realized that I didn't manage to send this out on Monday because of some power issues). == GCC == == Progress == * Cleared out some backlog of backports from mainline. * Investigating some of the BRANCH_COST results. * Small patches to fix VFP constraints being tested and fixed on trunk upstream. * Upstream bugzilla triaging. * Upstream bugzilla triaging. * Looked at Neon 64 bit arithmetic and sent out report. * Reviewed the unaligned access patch and the EPILOGUE_USES regression with coremark. * Issues with my panda board means my benchmark runs aren't happening. Need to urgently find a way of running them. The panda board dies mysteriously once a while. Playing around with the kernel to get something going . Will look at it again next week. * Merged neon shift immediates patch into linaro-4.6 but needs some rework. * Merged the fix for LP744754 into linaro 4.5 and 4.6 == Plans == * Back on to BRANCH_COST . * Resubmit neon shift immediates patch for merging. * Look at some of the perf regressions between a8 and A9. * Get a working panda board again. ! * Backport arith_shiftsi patch to 4.6 branch upstream. Meetings: * 1-1s * TCWG calls.

13 years, 10 months

[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * More on the address-of-main() bug. The original patch caused regressions on x86_64, so I submitted a different approach, which has now been applied upstream. * Worked on the libnih bug. It turned out to be a problem in the libc start routine. * A bit of patch review. * More on auto inc/dec. == Next week == * General bug-fixing. * More auto inc/dec. Richard

13 years, 10 months

[ACTIVITY] 2011-07-01

by David Gilbert

== 64 bit atomics == * Submitted patches to gcc patch list - One comment back already asking if we should really change ARM to have a VDSO to make checks of the user helper version easier * Added thumb ldrexd/strexd to valgrind; patch added to bug in their bugtracker (KDE bug 266035) * Came to the conclusion eglibc doesn't actually need any changes - It's got a place holder for a 64bit routine, but it's unused and isn't exposed to the libc users - Note that neither eglibc or glibc built cleanly from the trunk on ARM. * Started digging into QEmu a bit more to find out how to solve the helper problem == String routines == * Added SPEC2k6 string routine results to my charts; while most stuff is in the noise it seems the bionic routine is a bit slower overall than everything else, and my absolutely trivially simple ~5 instruction loop is a tie for the fastest with my smarter 4 byte/loop using uadd. == Next week == * Sleep, Rest, Relaxation, getting older * (Will be polling email for any more follow ups on my gcc patches) Dave

13 years, 10 months

[ACTIVITY] Jun 27 - Jul 1

by Ulrich Weigand

== GDB == * Analyzed all failures and skipped tests in remote gdb testsuite. Opened bug reports to track problems and missing features: 804387 [remote testsuite] Shared library test problems 804392 [remote testsuite] Rebuilt executables not copied 804396 [remote testsuite] Spurious failures 804400 [remote testsuite] Unnecessarily disabled tests 804401 [remote testsuite] Thread support 804403 [remote testsuite] Support for "attach" tests 804405 [remote testsuite] Core file tests 804406 [remote feature] Generate core files 804407 [remote feature] fork/vfork/exec events 804408 [remote feature] Address space randomization 804409 [remote feature] Checkpoints 804411 [remote feature] "info proc" == GCC == * Reviewed several Linaro GCC merge requests. * Fixed mainline reload bug PR rtl-optimization/49114 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

13 years, 10 months

[ACTIVITY] report week 26

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: (q1 milestones deleted) ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == upstream-omap3-patches * analysed omap3 patchstack and identified some initial parts to pull out * extracted and submitted upstream a 3-patch set to qdevify omap gpio * disentangled a cluster of patches for fixing and qdevifying NAND, ONENAND and the OMAP GPMC model; started on the cleanup process * spotted and fixed a bug where n810 segfaults if a key is pressed (this was already fixed in qemu-linaro but not very cleanly) == other == * submitted patch for proper implementation of prlimit64 syscall for qemu usermode * sent a patch to fix the final gcc 4.6 write-only-variable warning * patch review, etc Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

13 years, 10 months

[ACTIVITY] 27th June - 1st July

by Asa Sandahl

* Got introduced to most of the team members - great! * My manager fixed a linaro laptop for med which I have installed with Natty. (This is very good since I cannot run as root on my STEricsson laptop. There are also other security restrictions that makes it very hard to work in Linaro.) * Started working a little bit with the Snowball board. I have managed to flash it using the "riff" tool. * Read through the material about SPEC2000. * I have borrowed a Panda board that I can use for the next two weeks. A question that popped up is how to get one from Linaro? * I will be on vacation 18th July - 15 August Best regards Åsa

13 years, 10 months

No usb on omap3: 4.6 toolchain issue?

by Paolo Pisati

It all started with this: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552 basically, switching toolchain from 4.5 to 4.6, somehow broke usb on omap3. This morning i tested with linux-linaro-natty: [flag@newluxor linux-linaro-natty]$ git log --oneline -1 f15fd8f LINARO: Linux-linaro-2.6.38-1002.3 and i can reproduce the problem there too. Here is some more info (dmesg, toolchain, lsusb, etcetc): http://pastebin.ubuntu.com/620786/ -- bye, p.

13 years, 10 months

[ACTIVITY] June 26-30

by Ira Rosen

Hi, - support of multiple uses of original pattern statements (needed for over-promotion work) - committed upstream - support of widen-mult of unsigned types and constants - merged to gcc-linaro-4.6 - vectorizer peeling heuristic improvement - proposed to merge to gcc-linaro-4.6 Ira

13 years, 10 months

Fwd: [Bug gas/12931] ARM: gas fails to set the proper alignment on code sections, causing broken output

by Dave Martin

See the following commit in binutils trunk. If this is causing problems in other places, it could be worth considering for backport into the linaro tools. Cheers ---Dave http://sourceware.org/bugzilla/show_bug.cgi?id=12931 --- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2011-06-29 16:29:43 UTC --- CVSROOT: /cvs/src Module name: src Changes by: nickc(a)sourceware.org 2011-06-29 16:29:38 Modified files: gas : ChangeLog gas/config : tc-arm.c Log message: PR gas/12931 * config/tc-arm.c (mapping_state): When changing to ARM or THUMB state set the minimum required alignment of the section. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/ChangeLog.diff?cvsroot=src… http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-arm.c.diff?cvsro…

13 years, 10 months

iDCT implementation in GCC NEON intrinsics, for your perusal

by Michael K. Edwards

Here's an implementation of an 8x8 integer DCT done with NEON intrinsics -- essentially a translation of the assembly version in libjpeg-turbo trunk: https://github.com/mkedwards/crosstool-ng/blob/master/patches/libjpeg-turbo… It is in a compilable (on Linaro 2011.05 GCC 4.5, anyway; a recent Linaro 4.6 snapshot ICEs) but otherwise untested state. Still, it's interesting to compare the assembly that it generates against the hand-written version. I thought I'd give linaro-toolchain a heads-up in case y'all could use a test case that generates plenty of pressure on the VFP/NEON register bank. (I intend to use it to see how much performance difference there really is, on the A8 and A9, between NEON code compiled for 16 vs. 32 registers.) Cheers, - Michael

13 years, 10 months

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