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2011 May 27
2
[LLVMdev] Question about ARM/vfp/NEON code generation
...g, can I correctly say in general that the llc code generator might blur distinctions between NEON and VFP3 when it can do so safely? -David -----Original Message----- From: rengolin at gmail.com [mailto:rengolin at gmail.com] On Behalf Of Renato Golin Sent: Friday, May 27, 2011 2:38 AM To: David Dunkle Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] Question about ARM/vfp/NEON code generation On 27 May 2011 02:04, David Dunkle <ddunkle at arxan.com> wrote: > In all cases, I get code that looks pretty very the same; its like > what is below. However, I am expecting to see instruct...
2002 Sep 25
4
Samba and WinXP problem
...blem, and only got one Samba-related hit, and it wasn't quite the same problem I'm experiencing. I'm about ready to wipe the machine and reformat/reinstall XP, but before going to that extreme, I figured I'd try this list. So, does anyone have any ideas? :-) Stace -- Stacy J. Dunkle LAN Manager, Pennswoods.net
2011 Apr 13
2
[LLVMdev] Exception Handling Problems
On Apr 12, 2011, at 5:48 PM, David Dunkle wrote: > Pardon the basic question, but does this apply to clang, llvm-gcc, or > both? Yes. -eric
2011 May 27
0
[LLVMdev] Question about ARM/vfp/NEON code generation
On 27 May 2011 02:04, David Dunkle <ddunkle at arxan.com> wrote: > In all cases, I get code that looks pretty very the same; its like what > is below. However, I am expecting to see instruction level differences > between the vfp3 and neon versions. When I do the same with gcc 4.2 I do > see differences in the gen...
2011 May 27
0
[LLVMdev] Question about ARM/vfp/NEON code generation
On May 27, 2011, at 10:49 AM, David Dunkle wrote: > Thanks, that helps a lot. > >> All chips (to date) with NEON have VFP3, so it's safe to assume that a > -mfpu=neon will have VFP3, so all the decisions >> about code generated for VFP3 can safely be assumed by targets with > NEON. > > Just to confirm...
2011 May 27
1
[LLVMdev] Question about ARM/vfp/NEON code generation
I have a code generation question for ARM with VFP and NEON. I am generating code for the following function as a test: void FloatingPointTest(float f1, float f2, float f3) { float f4 = f1 * f2; if (f4 > f3) printf("%f\n",f2); else printf("%f\n",f3); } I have tried compiling with: 1. -mfloat-abi=softfp and -mfpu=neon 2.
2011 Apr 13
0
[LLVMdev] Exception Handling Problems
Sorry, but does your reply yes mean both? -David Sent from my iPhone On Apr 12, 2011, at 5:51 PM, "Eric Christopher" <echristo at apple.com> wrote: > > On Apr 12, 2011, at 5:48 PM, David Dunkle wrote: > >> Pardon the basic question, but does this apply to clang, llvm-gcc, or >> both? > > Yes. > > -eric
2002 Sep 26
1
Roaming Profiles question
Can 9x/ME profiles be safely kept in the same place as NT/2K/XP profiles? i.e., are they compatible, in that 9x settings can be used on an NT based machine, and vice versa, with each OS knowing which settings it can and can't use, or is it best to just keep them separated? -- Stacy J. Dunkle LAN Manager, Pennswoods.net
2014 Dec 12
2
Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26.
...es: Traubenzucker + Feldsalat spezielles Dressing (bringt selbst mit?) -------- Weitergeleitete Nachricht -------- Betreff: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26. Datum: Thu, 11 Dec 2014 15:34:39 +0100 Von: Markus <universe at truemetal.org> An: universe at truemetal.org Geschenke Moritz: dunkle Schokolade. Geschenke Anna: normale Schokolade. -------- Weitergeleitete Nachricht -------- Betreff: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26. Datum: Wed, 10 Dec 2014 05:12:16 +0100 Von: Markus <universe at truemetal.org> An: universe at truemetal.org + Haehnchenfleisch fuer Markus, kleine Karto...
2011 May 23
5
Variable Bit Rate
Is FLAC a variable bit rate format when streamed? If so, how can it be truly lossless? -- Dennis Brunnenmeyer Director of Engineering CEDAR RIDGE SYSTEMS 15019 Rattlesnake Road Grass Valley, CA 95945-8710 Office: 1 (530) 477-9015 Mobile: 1 (530) 320-9025 eMail: dennisb /at/ chronometrics /dot/ com http://www.chronometrics.com/crs/index.html <http://www.chronometrics.com/crs/index.html>
2010 Feb 17
2
[LLVMdev] using bugpoint to find miscompilation/code generation problems?
Sorry to ask about a documented use of bugpoint, but I am having trouble understanding what to do. I would like to be able to use bugpoint to simplify test cases, when the symptom is a run time difference in the testprogram behavior. That looks like what is described in the documentation as "miscompilation or perhaps code generation problems". There are examples in the LLVM doc showing
2010 Feb 18
0
[LLVMdev] using bugpoint to find miscompilation/code generation problems?
Hi David, > It then iterates until a simplified test case is created whose output is > still different from that of the native code. isn't that exactly what you want: a small test-case that shows the problem? Ciao, Duncan.
2010 Feb 18
1
[LLVMdev] using bugpoint to find miscompilation/code generation problems?
Yes, its what I want, but I can't figure out how to get bugpoint to accomplish this. -David ________________________________ From: Duncan Sands [mailto:baldrick at free.fr] Sent: Thu 2/18/2010 6:06 AM To: David Dunkle Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] using bugpoint to find miscompilation/code generation problems? Hi David, > It then iterates until a simplified test case is created whose output is > still different from that of the native code. isn't that exactly what you want: a...
2010 Apr 11
1
[LLVMdev] llvm.global_ctors and other "appending linkage" global variables?
Can anyone explain how llc translates "appending linkage" global variables like llvm.global_ctors into assembly? In the case I am examining, the global_ctor variables are in multiple bitcode object modules produced by the llvm compiler as arrays of pointers. As documented, the arrays seem to be combined when the different bitcode object modules are linked into one, so now there is one
2014 Dec 12
0
Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26.
...ing (bringt selbst mit?) > > > > -------- Weitergeleitete Nachricht -------- > Betreff: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26. > Datum: Thu, 11 Dec 2014 15:34:39 +0100 > Von: Markus <universe at truemetal.org> > An: universe at truemetal.org > > Geschenke Moritz: dunkle Schokolade. > Geschenke Anna: normale Schokolade. > > > > -------- Weitergeleitete Nachricht -------- > Betreff: Fwd: Fwd: Fwd: Fwd: Fwd: Fwd: 26. > Datum: Wed, 10 Dec 2014 05:12:16 +0100 > Von: Markus <universe at truemetal.org> > An: universe at truemetal.org &gt...
2012 Mar 27
1
[LLVMdev] question about SjLjEHPrepare
When testing with LLVM 3.0 I noticed a crash in LLC with a test case we are running. After examining the source, I found that the crash coming from SjLjEHPrepare.cpp, specifically from "ReplaceLandingPadVal". I can explain about the crash if needed, but I will omit that for now. Testing with and LLC built from the top of trunk showed no LLC crash, and the code in SjLhEHPrepare.cpp has
2011 Apr 13
0
[LLVMdev] Exception Handling Problems
Pardon the basic question, but does this apply to clang, llvm-gcc, or both? Thanks, -David -----Original Message----- From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Bill Wendling Sent: Tuesday, April 12, 2011 3:05 PM To: llvmdev List Subject: [LLVMdev] Exception Handling Problems Exception handling in LLVM is broken. It's as simple as that. We
2011 May 26
2
[LLVMdev] LLVM CodeGen Engineer job opening with Apple's compiler team
Hi all, LLVM CodeGen and Tools team at Apple is looking for exceptional compiler engineers. This is a great opportunity to work with many of the leaders in the LLVM community. If you are interested in this position, please send your resume / CV and relevant information to evan.cheng at apple.com Thanks, Evan Job description The Apple compiler team is seeking an engineer who is strongly
2011 May 23
3
Variable Bit Rate
...1MB (1048576 bytes). A good PNG compressor can get it to 200 bytes (this is not a typo: I have a completely white 1024*1024 PNG file in 222 bytes). > > Well it's the same with sound (a 5mn track with no sound whatsoever contains less information than "Nun seh' ich wohl, warum so dunkle Flammen"). That's also why the format can't help but be VBR: different pieces of sound contain different amounts of information per second, and therefore have different compression ratio (and compression ratios can --- very rarely --- go above even 1: white noise is completely incompr...
2011 Apr 12
3
[LLVMdev] Exception Handling Problems
Exception handling in LLVM is broken. It's as simple as that. We can simulate exception handling in most cases, but we cannot handle all cases. (For instance, SingleSource/UnitTests/ObjC/exceptions.m in our testsuite doesn't work on ARM at anything optimization level above -O0.) And there's no way to coerce it to work with our current EH scheme. We don't follow the exception