search for: filteau

Hello all, Is it possible to modify a single line in a textfile? I know it is possible to load the whole text file, do the change, and save this as a new file. However, this is not practical in my case, because the document is huge and cannot be fully loaded in R. Any idea? Best, Guillaume

Hello all, When I create a matrix, is there a way to make it start at [0,0], instead of [1,1]? That way, a 2x2 matrix would go from [0,0] to [1,1], instead of [1,1] to [2,2]. Best, Guillaume

A better way to handle this is to a td pattern to match "add n, -c" to a subtraction. I believe several targets do something similar to this. Evan On May 16, 2013, at 7:12 AM, Tom Stellard <tom at stellard.net> wrote: > On Thu, May 16, 2013 at 02:03:14AM +0000, Martin Filteau wrote: >> Hi all, >> >> It's the first LLVM backend we do for our asynchronous DSP. So, I apologize if this is a trivial question! >> >> The target-independent DAG combiner performs the following transformation: >> >> sub n, c ->...

On Thu, May 16, 2013 at 02:03:14AM +0000, Martin Filteau wrote: > Hi all, > > It's the first LLVM backend we do for our asynchronous DSP. So, I apologize if this is a trivial question! > > The target-independent DAG combiner performs the following transformation: > > sub n, c -> add n, -c > It looks to...

Hi all, It's the first LLVM backend we do for our asynchronous DSP. So, I apologize if this is a trivial question! The target-independent DAG combiner performs the following transformation: sub n, c -> add n, -c For our target, negative constants are more costly to encode. What is the best place to revert to a sub instruction? Kind regards, -- Martin

Hello all, I have a 2.0 GB dataset that I can't load into R, due to memory issues. The dataset itself is in a tab-delimited .txt file with 25 variables. I have a variable I'd like to add to the dataset. How do I do this? Best, Guillaume

Hello all, I?m trying to take a huge dataset (1.5 GB) and separate it into smaller chunks with R. So far I had nothing but problems. I cannot load the whole dataset in R due to memory problems. So, I instead try to load a few (100000) lines at a time (with read.table). However, R kept crashing (with no error message) at about the 6800000 line. This is extremely frustrating. To try to fix

Hi! I'm not sure how to handle intrinsic functions that have non-i32 operands. The target only supports 32-bit registers natively but for some operations, only the lower 16 bits are significant. For example, the SMULS instruction does a 16 x 16 fractional multiply with saturation. I've defined an intrinsic function: int __builtin_opus_smuls(short a, short b);