* GCC
Identified the latent bug that's upset my NEON-shifts testing. It turns
out the define-insn-and-shift patterns in arm/sync.md have no length
attributes set.
Now that the NEON 64-bit shifts appear to be not broken, I've relaunched
the 64-bit extend testing.
Identified the problem with my NEON-64-bit-negate patch: I already knew
it works better (produces more optimal code) with my NEON-immediates
patch, but it turns out that at -O0 the other patch is a hard
requirement or else bad things happen in output_move_vfp.
Backported Ramana's patch for ARM-mode testing of my recent Thumb 64-bit
test cases. I've applied it to Linaro GCC directly, without a merge
proposal, as it's a very low-risk patch.
Caught up with some launchpad blueprint fiddling.
Completed the merges from 4.6 and 4.7 FSF. The 4.7 merge was tricky as
it required working around a BZR bug; I've posted the workaround to the
toolchain list.
* Other
On leave on Tuesday
Public holiday on Friday.
Attached a copy of the ARM Linux ABI document to KBentry 39 so we're
hosting it somewhere, at least. Posted an internal Mentor/CS question
about getting its old home restored, and getting a relicensed edition to
allow others to use it as the basis for a hard-float equivalent.
=== Progress ===
* Worked on VFP addressing patch and corrected the failures.
* Got SPEC2k up and running with hot cold partitioning. Some SEGVs
that need investigation. In
general results appear to be better in quite a few cases.
* Investigated an issue with a merge request for upstream 4.7 branch
into our tree. There was a testsuite
failure and I wasn't able to reproduce it with a local i386 rebuild of
the toolchain. Therefore we'll have to
let this go in.
== Plans ==
* I will be away for 2 days this week attending the LLVM conference in London.
* Pursue backporting gnu_unique_object upstream.
* Finish off the VFP addressing modes patch upstream.
* Look at some of the existing blueprints and start discussions around
prioritizing this.
* Investigate some of the SEGVs with h-c partitioning.
Absences.
* Apr 12-13 : Euro-LLVM London.
* Linaro Connect Q2.12 - May 28 - June 1 -
Summary:
* Revise the patch for relocatable NLS support.
* Code size benchmark analysis.
Details:
1. Revise the patch for relocatable NLS support: lp:918926.
* Read the gcc configure and makefile.
* It seams hard to get the relative dir if the gcc is configured
with --bindir=... --datadir/datarootdir. E.g.
--bindir=/opt/bin
--datarootdir=/tmp/data
2. Code size benchmark analysis with -Os
* Investigate regression in small cases.
3. Try to build linaro gcc trunk with crosstool-ng. But it reports
error when configuring libquadmath.
* configure:9829: error: Link tests are not allowed after GCC_NO_EXECUTABLES.
* Manual check or a simple case show libc.so can be linked.
Plans:
* Tuning optimization heuristics for -Os
Planed leaves:
* April 9 - 11: Vacations
Best regards!
-Zhenqiang
Current Milestones:
|| || Planned || Estimate || Actual ||
||cp15-rework || 2012-01-06 || 2012-04-10 || ||
Historical Milestones:
||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 ||
||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 ||
== other ==
* LP:970252 got a beagle board booting so I could read the UART
version register; reviewed and applied to qemu-linaro the set
of patches provided by Jan Vesely (thanks!)
* sent a patchset cleaning up the GIC model so it is a self-contained
sysbus device; this should make it easier to just drop in a
functionally equivalent device which is a shim for an in-kernel
GIC model that uses the hardware VGIC features
* upstream review:
save/load support for sd.c [patchset from Samsung]
SPI bus [patchset from Petalogix]
* put together qemu-linaro prerelease tarball and did some testing
* performance evaluation finished and submitted
Continued work on neon 64-bit correctness. This is really dragging out
now. I had hoped to have had it fixed by now, but subtle bugs are subtle.
The 16-bit opcodes patch is now committed both upstream and in Linaro
GCC 4.7, however, so that's some progress at least.
Posted benchmark results for the the 64-bit shifts in core registers.
The results are inconclusive: the benchmark runs are too noisy.
As part of closing out the Windows toolchain card, I've documented the
binary build release process at:
https://wiki.linaro.org/WorkingGroups/ToolChain/BinaryBuild/ReleaseProcess
The interesting thing is a script that pulls builds from S3 and posts
them to Launchpad. There's a curl command at the end that does the
upload and might be useful.
-- Michael
On 1 April 2012 05:56, Ramana Radhakrishnan
<ramana.radhakrishnan(a)linaro.org> wrote:
> I find it a bit worrying that all the nptl tests are failing with a
> common error message
>
> http://builds.linaro.org/toolchain/eglibc-2.16~svn17843
>
> Aborted'
> make[6]: *** [/scratch/cbuild/slave/slaves/tcpanda05/eglibc-2.16~svn17843/eglibc/default/build/nptl/tst-cond7.out]
> Error 1
> libgcc_s.so.1 must be installed for pthread_cancel to work
> Didn't expect signal from child: got `Aborted'
>
> Why don't we have libgcc_s.so.1 installed on the system - shouldn't
> that be there if there was a gcc properly installed on the system ?
This is a bug on my side. I believe EGLIBC likes to have libgcc_s.so
in the top of the build directory - at least that's the impression I
got from reading the cross-test documentation the other day.
I've logged LP: #971064 and will look into it.
-- Michael
Hi Ricardo, Matthias. GCC 4.7 is almost here and it's likely that
Linaro GCC 4.7 will come out for next month's 2012.04 milestone.
For the binary toolchain to work we need the 4.7 runtime libraries on
the target. Matthias, what are your plans? How much of 4.7 is
packaged so far? Ricardo, could we pull these updates to libgcc,
libstdc++, and others into the LEB?
These should be backwards compatible but there's always a risk. Using
the 4.5 runtime with a 4.4 compiler back on Maverick was OK.
-- Michaele
Hi,
GDB for Android:
* Submitted upstream three patches for building gdbserver on Android.
Reworked two of them based on review comments, and committed one.
* Investigated ARM EABI build attributes and .note.ABI-tag as ways
of marking binaries as Android apps so that GDB can differentiate
them from regular Linux ARM binaries. Build attributes are quite
sophisticate and overkill for this purpose, and would also be out
of place for Android on x86. .note.ABI-tag is simpler and more
appropriate. Now experimenting with generating the .note.ABI-tag
section on Android binaries.
* Tried to find ARM GNU/Linux ABI supplement [1] but couldn't,
contacted Mentor Graphics' webmaster about the problem. No
response so far.
Obs: This Friday (04/06) will be a holiday in Brazil and hopefully I
will be AFK.
[1] http://www.codesourcery.com/gnu_toolchains/arm/arm_gnu_linux_abi.pdf
--
[]'s
Thiago Jung Bauermann
Linaro Toolchain Working Group
== GCC ==
* Committed fix for LP #960283 (PR tree-optimization/52686) to
FSF mainline as well as Linaro GCC 4.6 and 4.7.
* Worked on patch to use vld1.64/vst1.64 instead of vldm/vstm
for vector moves. Created merge request for testing.
* Worked on patch to use vld1/vst1 to implement vec_set/vec_extract
for cases where the scalar operand resides in memory.
Created merge request for testing.
* Ongoing work on fixing LP #959242.
* Ongoing work on improving end-of-loop value computation.
== Misc ==
* I'll be attending the Linux Foundation Collaboration Summit
in San Francisco next week, and present on "GDB on ARM".
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
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Wittkopp
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