GCC 4.6 BZR branch
You may have noticed that I have created a new BZR/Launchpad branch for Linaro GCC 4.6: lp:gcc-linaro/4.6 https://code.launchpad.net/~linaro-toolchain-dev/gcc-linaro/4.6 Up until now, this has not been buildable due to unfixed bugs. However, upstream GCC have now straightened out the problems, so I have pushed a buildable version into the branch. I shall attempt to keep this branch as up-to-date as I can (at least, I will once the holiday season and January travel are over), but I'll only push updates if they build for me, so hopefully the branch should remain fairly stable, at least for our purposes. Note that so far I've only tested build-ability. Right now I'm not making any promises about the quality of the compiler. At some point, we'll want to use this branch to hold our own patches (both those that will never go upstream, and those that are queued for GCC 4.7), so it will diverge from upstream 4.6 a bit. For the moment, it's merely a mirror. Andrew ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Re: [ACTIVITY] December 12 - 16
Hi Ramana, On 16 December 2010 20:11, Ramana Radhakrishnan wrote: > Hi Ira, > > On Thu, 2010-12-16 at 15:29 +0200, Ira Rosen wrote: >> - telecom viterbi (vectorization potential gain is 4x) requires >> conditional store sinking and load hoisting to enable if-conversion. I >> worked on implementation of store sinking this week. > > Is this the only feature that viterbi needs for vectorization ? > > >From some research that Tejas did earlier this year, I thought that > viterbi was among the hardest to vectorize because in addition to what > you mention we need to support vld/st2 or (ofcourse vzip and vld1 if we > don't support vld2) instructions and the other vbif / vbsl instructions > to support vectorization for viterbi. Right, we need vld2 and vst2 for Viterbi, and we are working on their implementation (see this thread for the latest discussion http://lists.linaro.org/pipermail/linaro-toolchain/2010-December/000540.html). > > I see that we support v in the backend now but we don't support > the vector bitfield instructions like vbit / vbif and vbsl which can be > used for vector select other than through intrinsics. I haven't checked this. But in any case vector select is very important and it's a good idea to support it anyway. Ira > > I could be of-course missing something here > > cheers > Ramana > > > >> >> Ira >> >> ___ >> linaro-toolchain mailing list >> linaro-toolchain@lists.linaro.org >> http://lists.linaro.org/mailman/listinfo/linaro-toolchain > > > ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] 13th -18th December 2010
* Linaro GCC lp:686381: C++ link failure on ARM Reproduced the bug and posted my findings to the bug report - user error. Changed the way the Linaro GCC version numbers are handled. Hopefully the new system should be less distasteful to Matthias. Updated the GCC release procedure document to match. Organised and chaired a meeting to discuss GCC optimization opportunities for ARM. It was well attended, and I think we had some useful discussion. Spend quite some time preparing beforehand, and writing it up afterwards. Next step is to come up with some actual plans to implement something. I imagine we can discuss this at the sprint in Dallas next month. See https://wiki.linaro.org/AndrewStubbs/Sandbox/GCCoptimizations * Upstream GCC My upstream patch to fix ARM smlabb has been approved and committed to GCC 4.6 (mainline). Only another three patches need approval now! Continued testing upstream GCC 4.6 with both cross and native builds. It appears to be in a buildable state now, with no extra patches required. I've updated the Linaro GCC 4.6 branch with the buildable state. * Other Updated my ESTA, and added my security details to the airline bookings. -- Future availability 20th Dec .. 3rd Jan - Vacation/Holiday 4th Jan .. 8th Jan - Business as usual 9th Jan .. 14th Jan - Linaro Sprint, Dallas 15th Jan .. 21st Jan - CodeSourcery/Mentor Annual Meeting, Scottsdale 24th Jan onwards - normal service restored! ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
