search for: vecor

Dears, is there any way to "switch off" or work around the error message that pops up when I do something like: A<-B['logical vector'] and when 'logical vector' only consists of FALSE values? My problem is that this message always kicks me out of my loops and always testing via an if clause whether 'logical vector' contains any TRUE values is much too

I want to create a vecor with frequencies. I have tried this: a <- c(1,1,1,1,2,3,4,5,5) b <- table(a) print (b[1]) which results in: > print (b[1]) 1 4 The only thing I want is the 4. So this seems obvious: print (b[1,2]) but it does not work: Error in b[1, 2] : incorrect number of dimensions How do I ge...

Hi gruop, Pardon my question, but how could I import a excel file with 2 columns to R and then work with them as vecors. Thanks in advance,

...5] and has length 8 instead of 10. In the cases when the size of pop and deriven sample of it is enough large using the following command is not helpful. newpop<-pop[-c(2,10)] One could simplify my question in this way: how we can exclude a sub vector values from a super vector value (i.e sub vecor values are subset of super vector values). Thanks in advance. Hamid [[alternative HTML version deleted]]

...5] and has length 8 instead of 10. In the cases when the size of pop and deriven sample of it is enough large using the following command is not helpful. newpop<-pop[-c(2,10)] One could simplify my question in this way: how we can exclude a sub vector values from a super vector value (i.e sub vecor values are subset of super vector values). Thanks in advance. Hamid [[alternative HTML version deleted]]

Dear List, given a vecor of times in 5,15 and 30 minutes and a start point in time, lets say 09:30:00, how do I add up those times to the start time getting a cumulative time sequence? mt<-times(c('00:05:00', '00:15:00', '00:30:00')) mt wanted 00:05:00 09:35:00 00:15:00 09:50:00 00:30:00 1...

...float 0.000000e+00, float 0.000000e+00>, float %2, i32 2 %4 = insertelement <8 x float> %3, float %2, i32 1 %5 = getelementptr <8 x float>* %dest, i32 19 store <8 x float> %4, <8 x float>* %5, align 4 ret void } I'm expecting LLVM to generate code so that at vecor is stored at dest[19] with following value: <float 0.000000e+00, float 'elem_0_of_source' , float 'elem_0_of_source', float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00> When I use llc trunk as follows on a Corei7 machine I'...

...is+transform AND analysis-only pre-passes, to allow a more fine grained control over vectorization (and ease tests of other passes that use Polly's info). > If the parallelism information is available outside polly, we can also > find some way to move code generation support for OpenMP, Vecorization > and CUDA from Polly to LLVM transformation library, after that we can > also generate such code base on the analysis result of the SCEV based > parallelism analysis. LLVM already has OpenMP support, maybe we should follow a similar standard, or common them up. CUDA would be clos...

...sis results into the polyhedral loop parallelism analysis pass. By doing this, other FunctionPasses/LoopPasses can query the parallelism information calculated by Polly. If the parallelism information is available outside polly, we can also find some way to move code generation support for OpenMP, Vecorization and CUDA from Polly to LLVM transformation library, after that we can also generate such code base on the analysis result of the SCEV based parallelism analysis. best regards ether > > 2. Full polyhedral code modification: use the annotation of the > previous pass to extensively...

...float 0.000000e+00, float 0.000000e+00>, float %2, i32 2 %4 = insertelement <8 x float> %3, float %2, i32 1 %5 = getelementptr <8 x float>* %dest, i32 19 store <8 x float> %4, <8 x float>* %5, align 4 ret void } I'm expecting LLVM to generate code so that at vecor is stored at dest[19] with following value: <float 0.000000e+00, float 'elem_0_of_source' , float 'elem_0_of_source', float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00> When I use llc trunk as follows on a Corei7 machine I'...

> > Okay. If you'll update your local BBVectorize patches, then we can pull them upstream. Then we'll just need to update the unroller. If I understand this thread correctly, you want to enable vecorization by telling the BB vectorizer that different operations are independent. I understand your motivation and I agree that this is indeed one way to do vectorization. However, I don't completely understand something. If we already have the information that consecutive iterations of the loop...

On 02/18/2013 07:42 PM, Hal Finkel wrote: > Why don't we just add an optional iteration id to > !llvm.mem.parallel_loop_access? Sounds like a good idea to me. -- --Pekka

----- Original Message ----- > From: "Pekka Jääskeläinen" <pekka.jaaskelainen at tut.fi> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: "Andrew Trick" <atrick at apple.com>, "Tobias Grosser" <tobias at grosser.es>, "llvmdev at cs.uiuc.edu Dev" > <llvmdev at cs.uiuc.edu> > Sent: Monday, February 18, 2013

...s, to allow a more fine > grained control over vectorization (and ease tests of other passes > that use Polly's info). > > > > If the parallelism information is available outside polly, we can > > also find some way to move code generation support for OpenMP, > > Vecorization and CUDA from Polly to LLVM transformation library, > > after that we can also generate such code base on the analysis > > result of the SCEV based parallelism analysis. > > LLVM already has OpenMP support, maybe we should follow a similar > standard, or common them up....

Hal, I'm opening a new discussion on vectorization metadata, since it has little to do with fp-math. ;) What kind of metadata would you annotate in the instructions? If I remember from your talk, you're not doing any loop or whole-function analysis, possibly leaving it for Polly to help you along the way. I remember discussing it with Tobias that Polly could have three main steps: 1.

A friend has an old Pentium-133 laptop with 32MB of memory and a 1.3 GB hard disk that he wants to use as a web server for a very small community. Will CentOS (or any other RHEL derived distribution for that matter) install and run with acceptable performance on such a system, or will a specialized distribution like Damn Small Linux be a better choice? In this case, disk space is not a big

...ocess R segmentation fault at Wed Jan 28 21:14:41 2004 > > > > > > ______________________________________________________________ > > _________ > > > > This was ran in mos2, interactively in emacs and the > > error differs from > > > > the other vecor errors. > > > > > > > > And then I ran the marchdatacopy1990.R in klee and got > > the following > > > > warning: > > > > > > ______________________________________________________________ > > _______________ > > > > run...

Hi all, Now, four backends (if I am counting right: X86, ARM, AArch64, AMDGPU) are working on bringing-up GlobalISel, I’d like to switch the default of the LLVM_BUILD_GLOBAL_ISEL variable in CMake, such that the framework gets built by default. ** Impact of Flipping the Switch ** * Upsides * For people developing on GlobalISel, it will: - Simplify the CMake command to type :) - Build/Test

...gt; - Require the setting of an additional CMake variable to disable it (-DLLVM_BUILD_GLOBAL_ISEL=OFF) > > This has a higher impact on slow bots, such as ARM and MIPS, and it's > not a trivial amount of time and space. > > On previous occasions (for example integrated-asm, lld, vecorizer), we > have used the "self-host + test-suite passing" model and it worked > well. Meaning, before it passes those two, it should have special > buildbots, after, it can be turned on by default. > > To move to the new technology we need an additional step, which is to &...

Looking through the archives I have seen talk of making CPU specific optimisations for Vorbis, a la MMX/3DNow!/SSE. The feeling I gather is to wait until something is working well in C before committing to any kind of specific optimisation. What if oft used and needed DSP functions were identified and standardised DSP functionality be written for Vorbis? This would seperate the basically