search for: stencils

Hello, I am trying to vectorize following stencil code; #include <stdio.h> #define N 100351 // This function computes 2D-5 point Jacobi stencil void stencil(int a[restrict][N]) { int i, j, k; for (k = 0; k < 100; k++) { for (i = 1; i <= N-2; i++) { for (j = 1; j <= N-2; j++) { a[i][j] = 0.25 * (a[i][j] + a[i-1][j] + a[i+1][j] + a[i][j-1] +

I am able to vectorize it with the following code; #include <stdio.h> #define N 100351 // This function computes 2D-5 point Jacobi stencil void stencil(int a[][N], int b[][N]) { int i, j, k; for (k = 0; k < N; k++) { for (i = 1; i <= N-2; i++) for (j = 1; j <= N-2; j++) b[i][j] = 0.25 * (a[i][j] + a[i-1][j] + a[i+1][j] + a[i][j-1] + a[i][j+1]); for

Does it happen due to loop carried dependence? if yes what is the solution to vectorize such codes? please reply. i m waiting. On Jul 1, 2017 12:30 PM, "hameeza ahmed" <hahmed2305 at gmail.com> wrote: > I even tried polly but still my llvm IR does not contain vector > instructions. i used the following command; > > clang -S -emit-llvm stencil.c -march=knl -O3

Your problem is due to GVN partial reduction elimination (PRE) which introduces a PHI node the current loop vectorizer cannot handle: opt -O3 stencil.ll -pass-remarks=loop-vectorize -pass-remarks-missed=loop-vectorize -pass-remarks-analysis=loop-vectorize remark: <unknown>:0:0: loop not vectorized: value that could not be identified as reduction is used outside the loop remark:

<div> </div><div> </div><div>Hello,</div><div> </div><div>To me this is an issue in llvm loop vectorizer (if N is large enough to prevent complete unrolling of j-loop).</div><div> </div><div>Woud you mind to share stencil.ll than I would say more definitely what the issue

I have matrix multiplication and stencil code. I vectorise it through the following command. opt -S -O3 -force-vector-width=2048 stencil.ll -o stencil_o3.ll in both the examples of matrix mult and stencil it vectorises fine when my loop iterations >2048. but if i keep both iterations and vector width=2048. it produces scalar code IR not vectorizes it. Is it llvm bug? Please help me.

Hello Everyone! In planning for my new asterisk environment, I would like to have some nice presentation graphics for "breaking down" the system to management here where I work. I like to use Visio for these kinds of things, and was wondering if anyone had a good source for Visio stencils that fit into a telecom plan. There was a set from Cisco, and it'll probably be 'good enough' for what I need, but I thought I would ask the community. Thanks everyone! - Don

...hich can legitimately cause differences. > The following tests pass at "-O3" and "-O3 -ffp-contract=on" compared with FP_ABSTOLERANCE=1e-5 against "-O0 -ffp-contract=off": polybench/linear-algebra/kernels/symm polybench/linear-algebra/solvers/gramschmidt polybench/stencils/seidel-2d The output of these 3 tests from "-O0 -ffp-contract=off" also matches the reference output. The following 2 tests still require increased FP_ABSTOLERANCE to pass compare between "-O3", "-O3 -ffp-contract=on" vs. "-O0 -ffp-contract=off" polybench/...

SimCity 4 has a lot of problems of its own that cause it to Crash to the Desktop quite often. However, the failure to provide more than one back buffer makes it hard to run large cities, and has gotten past annoyance for me, at least. Here is my latest log, from initiation of the game to the point where I finally killed it because the graphics had gone crazy again. My system has MB of graphics

I've decided to try Zanzarah in both wine 1.2.2 and in latest release 1.3.27 None works... :( Here is the terminal output in 1.3.27: ... DFMT_R8G8_SNORM_L8X8_UNORM to floating point. err:d3d_surface:surface_convert_color_to_float Unhandled conversion from WINED3DFMT_R8G8_SNORM_L8X8_UNORM to floating point. err:d3d_surface:surface_convert_color_to_float Unhandled conversion from

Greetings everybody! For anybody working on blur-related things, take a look at this glitch I encountered: https://bugs.freedesktop.org/show_bug.cgi?id=10275 Best regards... Mirco "MacSlow" M?ller -- email - macslow@bangang.de www - http://macslow.thepimp.net lowfat - http://macslow.thepimp.net/sponsor-it

https://bugs.freedesktop.org/show_bug.cgi?id=48742 Bug #: 48742 Summary: fbotexture -arb misrenders on nv43 Classification: Unclassified Product: Mesa Version: git Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau

I've been looking at REnouveau dumps to check how the blob does the clear buffers thing and they seem to do it a bit differently than what you committed, so I tried a new version of the clear functions (see how I changed it below) with a little test: Setup 2 texture render targets (and a depth target) and glClear them to a color changing with time, then render a triangle textured with the

Well, good old Simcity 4 is now giving me event entries I've never seen before. The last one gave me a crash to the desk top, which is not unusual for this game, but I don't understand what the log is telling me. Please have a look at this and see if you can help out. [code] fixme:system:SystemParametersInfoW Unimplemented action: 94 (SPI_GETMOUSETRAILS) fixme:win:EnumDisplayDevicesW

I get an HD display with this program, and a system lockup into the bargain. I can't even get in with the three finger salute. I had to use the Magic Sysrq keys to safely close the system and reboot. At least nothing was lost, and I got the system back. wine 1.3.6 freshly compiled this hour UBUNTU 10.10 AMD64 updated after lunch. Here is the application log: [code]

I've tried to run demo of Hard Reset and it has two big problems on Wine. First is that mouse isn't working. You get input only from keyboard but that can be solved with raw input patch. I used the one that is working with Deus Ex: Human Revolution: http://dl.dropbox.com/u/6901628/raw2.patch but second is much worse. Basically almost all of the textures aren't rendered. It starts

Unity3D.com I'm getting tired of having to switch to Windows (I dual boot windows and ubuntu) everytime I want to code in Unity so I tried installing it under Wine 1.3.22. I got it to build my project from dropbox and open it, but as soon as the editor opens up the window freezes. Here is what the terminal put out as I ran it: Code: fixme:mountmgr:harddisk_ioctl unsupported ioctl 2d1400

...asynchronous hostname resolution. Henri Verbeet (40): d3d8: Do not specify WINED3D_TEXTURE_CREATE_MAPPABLE in texture_init(). d3d8: Do not specify WINED3D_TEXTURE_CREATE_MAPPABLE in cubetexture_init(). d3d8: Do not specify WINED3D_TEXTURE_CREATE_MAPPABLE in d3d8_device_CreateDepthStencilSurface(). d3d8: Do not specify WINED3D_TEXTURE_CREATE_MAPPABLE in d3d8_device_CreateImageSurface(). d3d8: Do not add map access indiscriminately in texture_init(). d3d8: Do not add map access indiscriminately in cubetexture_init(). d3d8: Do not add map access indiscriminately...

im useing ubuntu 8.10, on windows i got 20-40fps in towns and on ubuntu i got 2-7fps in towns, useing wine 1.0.1 beacouse any other new wine version gets my game stuck at login looked at this (http://appdb.winehq.org/objectManager.php?sClass=version&iId=10214) page and it seems that it should work on wine 1.1.23 but it doesnt work for me and added those extra dll files wine configuration is

...GetIpAddrTable causing some licensed programs to fail due to invalid MAC address 40359 Galactic Civilization III fails to start 40804 Touhou 6, 7, 8, 10, 11 have severe fps drop. 41055 "Texture ... does not have a drawable" on i915 with D3D8 41059 Necropolis requires OMSetDepthStencilState Two-sided stencil testing when using DirectX 11 41402 DDBST unusable due to "fixme:systray:wine_notify_icon unhandled tray message: 4" 41454 Outlast 2 Demo requires R32G32_UINT and R32_UINT formats 41493 Sniper Elite V2 stuck at "Completing Installation 1%" 41508...