Hi,
* PR 49087 - fixed
* PR 49038 - opened by Richard - fixed on 4.7, to be backported to 4.5 and 4.6
* working on widening multiplication for unsigned types and constants
(the signed case works fine)
Ira
Posted a new patch for 16 -> 64 bit multiply and accumulate:
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg05794.html
Pushed the same patch to a Launchpad branch for testing.
Pinged my addw/subw patch as a review didn't seem forthcoming.
Worked on a canonical form for HImode to DImode multiple-and-accumulate.
The problem isn't too hard to fix, but it's hard to do it in a nice way.
Attended Nathan S's reorg call. Followed up by talking to Nathan F about
what he's been working on with Wind River. Read up on the Wiki.
Looked at why the ARM smlal{tb,bt,tt} instructions are not generated.
I've added the proper patterns, but combine doesn't match them, and I've
run out of time this week to check why.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* ARM Thumb2 addw/subw support.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html
* Multiply and accumulate:
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg05794.html
== Last week ==
* Took Monday off, flew back to Taiwan on Tues., got home Wed. night.
* LP:689887, ICE in get_arm_condition_code(). Finally have some new
progress on this. Found my code was rejecting DImode comparisons,
causing uses of __aeabi_lcmp, etc. in expanded RTL. While this still
does not fully explain a bootstrap fail, it may be related, and it's
good I found this here rather then scratch heads on performance
regressions later... :)
* LP:771903: invalid ubfx asm produced by GCC. Mostly got down to the
bottom of this. This bug is rather well hidden, first avoided due to
some inlining heuristic changes after FSF 4.5 was branched (hence 4.6
and trunk doesn't show on the testcase), then hidden again later by
-ftree-bit-ccp. Was able to reproduce on mainline trunk after some
changes to testcase and options. Will send patch later.
* Talked with Ramana on IRC and mail about the '+' constraint modifiers
in the VFP fmul/fdiv patterns. Mostly concluded that these are typos,
and should be fixed.
== This week ==
* Continue with issues.
Hi there. The next two weeks is where we take the technical topics
from the TSC and the discussions had during the summit and turn them
into the concrete engineering blueprints for this cycle. I've created
a page at:
https://wiki.linaro.org/MichaelHope/Sandbox/1111Blueprints
listing all of the TRs. Could you please have a look through these,
find any with your name on them, and fill in the wiki page. I've put
more notes on the page itself. Some of the topics may warrant
specifications.
Let me know if you have questions on what the topics actually mean.
-- Michael
* Profiling SPEC 2k6 still; about 3/4 of the latrace files are
generated but it's taking some hand holding with some of them
(e.g. finding one that makes millions of calls to a library function
that we're not interested in but generates a huge log, and hence
needs it excluding).
* Working through the ones that I have with analysis scripts and
writing the interesting things up.
* Submitted ARM test suite fix for latrace (unsigned characterism)
* Verified Richard's binutils fix in natty-proposed fixed the vtk FTBFS
* Blueprint for 64bit sync primitives.
Dave
Hi,
* started to measure the overhead of -funwind-tables
* libunwind text size increase < 5%
* firefox4 is still building... :)
* found a small glitch when cross compiling the binutils deb package
* made a small patch, talked with doko, fix upstream
* installed android on the pandaboard
https://wiki.linaro.org/KenWerner/Sandbox/AndroidOnPanda
* setup an android development environment on my thinkpad
Regards
Ken
RAG:
Red:
Amber:
Green: 1105 work item status 100% complete
Current Milestones:
| Planned | Estimate | Actual |
qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | n/a |
close out 1105 blueprints | 2011-05-28 | 2011-05-28 | 201--05-19 |
complete 1111 planning | 2011-05-28 | 2011-05-28 | |
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 |
qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 |
== merge-correctness-fixes ==
* last few work items for this blueprint either completed or postponed
[For the record, postponed work:
setting Cortex A8r2 device ID etc regs -- moved to omap3 upstreaming
trustzone -- may get its own blueprint this cycle
VCVT fp exception flags -- postponed as rather tricky and an
obscure corner case that is unlikely to be noticed by users]
== other ==
* tracked down bug with QEMU loading of Google Go produced ELF files,
submitted patch
* talked to our local trustzone expert, very useful
* reworked and resent FPSCR exception flags patches based on review
comments
* reviewed a patch for setting IFSR right for BKPT
* more planning effort
* sent patch to suppress SD card model warnings generated when Linux
probes to see if it's an SDIO card
* redid the "check for unused -nic options" patch as it turned out to
cause regressions with NICs created via -device.
Meetings: toolchain, standup, 1-2-1
Current qemu patch status is tracked here:
https://wiki.linaro.org/PeterMaydell/QemuPatchStatus
Absences:
(maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver
[LinuxCon proper follows on 17-19th]
== This week ==
* Spent almost all the week on GCC's auto inc/dec pass. I first
continued with the incremental "clean ups" and recoding that I'd
started during free time at Budapest, with the idea of bolting the new
optimisations on top of that. However, in the end, I decided it would
be better to rewrite the pass entirely, using a different approach.
I've now got an early prototype of that rewrite, and it seems to be
working as expected on the test cases I've tried so far. I'm running
a regression test over the weekend, although TBH, I expect it to fail
at this stage.
* Tested the fix for vzip, vunz and vtrn. Went well, so I'll submit
next week.
* Blueprints.
== Next week ==
* More auto inc/dec:
* Round off some known rough edges in the prototype.
* Fix bugs.
* Run benchmarks.
* Run code comparison tests (diffing assembly code), both on ARM and
on other targets of interest.
Richard
