search for: memcopi

Folks, the packets I want to place in an ogg stream are concatenations of two hunks of memory. Rather than memcopy() them into one then pass them to libogg, I patched framing.c to accept iovecs. The unified diff is 80 lines, minus the OS-specific stuff for defining struct ogg_iovec_t - pretty trivial. Is there any interest in it? Or is libogg frozen while all efforts are concentrated on

Yes, I know this works peachy keen for char arrays. I'm looking at (which is hard to express in C) something like void foo () { int bar[20] = { 42, 42, ..., 42 }; } I don't want to do a memcopy of the 20 element constant array, and memset doesn't work here. I want an intrinsic that copys the scalar int constant 42 to each element of the int array. bagel On 11/10/2016 03:30

I am using 'portaudio' and 'speex' to implement a speech audio capture/playback. Preprocess works fine but not the echo canceller (associated with preprocessor). I have read 'testecho.c' but it didn't help me. What I am doing bad? This is my implementation: One thread to capture and playback, both are different functions called in different times directly from

> On Aug 7, 2014, at 4:12 AM, Anton Korobeynikov <anton at korobeynikov.info> wrote: > >> I downloaded the latest NDK (r10) and compiled with the following cmd: >> arm-linux-androideabi-clang myMemcpy.c -S -fno-builtin -o0 >> It still produces assembly with a call to "memcpy". Maybe the -fno-builtin >> is broken also in the latest release. >

On 6 July 2011 15:57, D S Khudia <daya.khudia at gmail.com> wrote: > Since I am inserting a new basic block (contains printf statement and > program exit) which is jumped upon based on the result of > the comparison, the compiler cannot/shouldnot optimize that away by means of > DCE or anything else. It most certainly can, since the comparison yields always the same result. The

Use access_extent_buffer_page() to point at btree location of inline compressed data so it can be inflated without a memcopy. Signed-off-by: jim owens <jowens@hp.com> Signed-off-by: jim owens <jim6336@gmail.com> --- V2 fixes whitespace checkpatch warning fs/btrfs/extent_io.c | 16 ++++++++++++++++ fs/btrfs/extent_io.h | 3 +++ 2 files changed, 19 insertions(+), 0 deletions(-)

Hi, I am from a Java background and pretty new to Ruby and Rails. What I am wondering is how I would shared state accross requests and users without involving IO, i.e. use memory. My current understanding is that for each request a new process ist spawn and therefore it gets its own memory. So no sharing can take place between requests? Do I understand this right? For those who know

Second question: I was checking NEON instructions this week and the vector types seem to be inside structures. If vector types are considered proper types in LLVM, why pack them inside structures? That results in a lot of boilerplate code for converting and copying the values (about 20 lines of IR) just to call a NEON instruction that, in the end, will be converted into three instructions: VLDR

Hello, The code snippet pasted in the previous email are generated at -O0 with llc. Since I am inserting a new basic block (contains printf statement and program exit) which is jumped upon based on the result of the comparison, the compiler cannot/shouldnot optimize that away by means of DCE or anything else. The same kind of stuff is happening for the following duplication. bb6.split:

Hi all, We currently have code in InstCombine that tries to expand memcpy / memmove intrinsics that are copying something that fits in a single register to a load and store in the IR. We then have other code in SelectionDAG that expands small memcpy intrinsics to sequences of loads and stores. The InstCombine one is useful, as it exposes more optimisation opportunities, but unfortunately it is

Frank, Both RZope and Rho solve this problem. RZope (http://www.analytics.washington.edu/statcomp/projects/rzope/)solves it by using *nix's fork command, which takes as much time as a memcopy. Rho(http://rho-project.org) solves it by maintaining a pool of idling R processes, which it maintains active & can pull to do a calculation immediately. Both of these are pretty

Hi Qin, On Mon, Aug 26, 2013 at 10:32 PM, Qin Chuanyu <qinchuanyu@huawei.com> wrote: > Hi all > > I am participating in a project which try to port vhost_net on Xen。 Neat! > By change the memory copy and notify mechanism ，currently virtio-net with > vhost_net could run on Xen with good performance。 I think the key in doing this would be to implement a property ioeventfd

Greetings, I'm having some sort of problem using ov_read_float(). Everything looks good to me, but I'm trashing memory somehow, so clearly I'm screwing something up. What confuses me is why it takes a ***float for the buffer. I call it like so: float **buffer bytes_read = ov_read_float(&vf, &buffer, 0) memcpy (b, *buffer, 0); This compiles fine, but after a few reads,

Back in the day, we called this a BLT (block transfer, pronouced 'blit') for the PDP-10 instruction of that name. You can do this by assigning the first value, then do an overlapping memcpy to fill in the rest. There's probably something clever you can do with vector instructions too, in many cases. --paulr From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Ryan

On Sep 21, 2010, at 9:33 AM, Renato Golin wrote: > Second question: > > I was checking NEON instructions this week and the vector types seem > to be inside structures. If vector types are considered proper types > in LLVM, why pack them inside structures? Because that is what ARM has specified? They define the vector types that are used with their NEON intrinsics as

HA! Just when I was getting ready to drop myself from this list, along comes a ham radio question! Shoving digital voice down a 100 Hz pipe would be mighty darned tough/impossible. N0YMV has a good suggestion. Try those WSJT modes. They use narrow bandwidth and are fun to play with. There are documented instances where moon-bounce QSOs have been completed with these modes. No, it's

Hi Renato, I am trying to add a intrinsic call between the similar two instructions which either I'll remove or convert to nop in codegen. Does that kind of seem appropriate for the purpose here? Thanks Daya On Wed, Jul 6, 2011 at 11:55 AM, Renato Golin <renato.golin at arm.com> wrote: > On 6 July 2011 15:57, D S Khudia <daya.khudia at gmail.com> wrote: > > Since I am

I am asking for some collective wisdom/guidance. What sort of IR construct should one use to implement filling each element in an array (or vector) with the same value? In C++, this might arise in "std:fill" or "std:fill_n", when the element values in the vector are identical. In the D language, one can fill an array or a slice of an array by an assignment, e.g.

Hello, Is there a script to update those test cases? I see mention of a sed script in the commit message but when I try it (see attached) on sed I get the following error: sed: file script line 2: invalid reference \3 on `s' command's RHS Did I lose something in a copy-paste? Is it not really a sed script? How do I run it? On Fri, Jan 19, 2018 at 9:15 AM, Daniel Neilson via

Hi Alexandre, The script uses extended-sed syntax, so you need to run sed with the -E option. For example, when preparing the patch I created a file ( script.sed ) containing all of the lines that I copied into the commit message. Then, I ran this bash one-liner from the test directory: for f in $(find . -name '*.ll'); do sed -E -i ‘.sedbak' -f script.sed $f; done When I was happy