search for: 3dnow

qemu recently added support for 3dnow instructions. Because of that, 3dnow will be featured among cpuid bits. But this will break kvm in cpus that don't have those instructions (which includes my laptop). So we fixup our cpuid before exposing it to the guest. Signed-off-by: Glauber Costa <gcosta at redhat.com> --- arch/x86/...

qemu recently added support for 3dnow instructions. Because of that, 3dnow will be featured among cpuid bits. But this will break kvm in cpus that don't have those instructions (which includes my laptop). So we fixup our cpuid before exposing it to the guest. Signed-off-by: Glauber Costa <gcosta at redhat.com> --- arch/x86/...

Ok, what about enabling the 3dnow function in libFLAC by default? I think time has shown the function is bugfree... :) -- Miroslav Lichvar

Hi Jean Marc, I think there is just a confusion over terminology going on here- I agree that support for 3dnow base version may not necessarily be relevant; However, even though 3dNow extended is a bastardized version of SSE, it still supports the same instructions, and that is what is important- I don't think we intend to add any AMD specfic code. The real issue is cross CPU SSE support, and whether...

On Tue, Dec 17, 2002 at 01:01:08PM -0800, Josh Coalson wrote: > --- Miroslav Lichvar <lichvarm@phoenix.inf.upol.cz> wrote: > > Ok, what about enabling the 3dnow function in libFLAC by default? > > I think time has shown the function is bugfree... :) > > Yeah, I just haven't done it because I don't remember hearing > feedback from others about using it (or maybe I just forgot... > has anyone else built flac 1.0.4 with ./configure...

I finally got all of the 3DNow! instruction intrinsics and builtins into LLVM and Clang, however, while testing them, I've noticed that they produce incorrect results. For example: typedef float V2f __attribute__((vector_size(8))); int main() { V2f dest, a = {1.0, 3.0}, b = {10.0, 3.5}; dest = __builtin_ia32_pfadd(a,...

Remove visibility of the FFXSR CPUID bit to an HVM guest. This patch allows HVM Windows x64 to install/boot on AMD-V platforms. This patches applies cleanly to xen-unstable 13743. Please apply to xen-unstable/3.0.5. If possible, pls apply to xen-3.0.4-testing. --Tom thomas.woller@amd.com AMD Corporation 5204 E. Ben White Blvd. UBC1 Austin, Texas 78741 +1-512-602-0059

--- Asheesh Laroia <paulproteus@technologist.com> wrote: > Can't you write a script for ./configure that checks for this, rather > than > having the library do the check each time it's used? If not, perhaps > check /proc/cpuinfo or something. The DoIHaveSSE and DoIHave3DNow > checks > could fork() if the system provides fork(); if not, the checks would > return false. > > Couldn't you also just check for fork() in the configure script? cpu support for 3dnow and sse can be easily detected at runtime. I turned off 3dnow by default because it is imp...

On Tue, Dec 17, 2002 at 01:01:08PM -0800, Josh Coalson wrote: > --- Miroslav Lichvar <lichvarm@phoenix.inf.upol.cz> wrote: > > Ok, what about enabling the 3dnow function in libFLAC by default? > > I think time has shown the function is bugfree... :) > > Yeah, I just haven't done it because I don't remember hearing > feedback from others about using it (or maybe I just forgot... > has anyone else built flac 1.0.4 with ./configure...

--- Miroslav Lichvar <lichvarm@phoenix.inf.upol.cz> wrote: > On Wed, Nov 14, 2001 at 09:37:47AM -0800, Josh Coalson wrote: > > cpu support for 3dnow and sse can be easily detected at > > runtime. I turned off 3dnow by default because it is > > implicated in some crashes. > > Hmm, i never have any crash. Can i get more informations about these > crases? Or you are talking about that ones posted in this list about > mont...

...-FP version, however the run time flags need to be settable with a non FP SSE mode so that exceptions are avoided. I thus propose a set of defines like this instead of the ones in our initial patch: #define CPU_MODE_NONE 0 #define CPU_MODE_MMX 1 // Base Intel MMX x86 #define CPU_MODE_3DNOW 2 // Base AMD 3Dnow extensions #define CPU_MODE_SSE 4 // Intel Integer SSE instructions #define CPU_MODE_3DNOWEXT 8 // AMD 3Dnow extended instructions #define CPU_MODE_SSEFP 16 // SSE FP modes, mainly support for xmm registers #define CPU_MODE_SSE2 32 // Intel SSE2 instructions #define...

Hi, I´m new on this list so I really don´t know that kind of questions have been asked, but here I go. Is the current ogg plug-ins using any mmx or 3dnow! instructions? Is there any performance to gain? I know that most of the mp3-decoders uses mmx/3dnow! to decode mp3streams so in theory it would be applyable to ogg to...? Just a thought... Regards, Andreas Karlsson hermes@home.se http://www.ft2.net <HR NOSHADE> <UL> <LI>appli...

...es the stack for the printf call seems to be >> messing it up. > > I would call that "user error"; basically, using MMX instructions > messes up the FP stack, and we assume the user is smart enough to make > sure the two don't mix. More specifically, if you use MMX/3dNow intrinsics, you have to call "emms" at ABI boundaries. -Chris

On Thu, Apr 14, 2011 at 12:16 PM, Michael Spencer <bigcheesegs at gmail.com> wrote: > I finally got all of the 3DNow! instruction intrinsics and builtins > into LLVM and Clang, however, while testing them, I've noticed that > they produce incorrect results. > > For example: > > typedef float V2f __attribute__((vector_size(8))); > > int main() { >  V2f dest, a = {1.0, 3.0}, b = {10.0...

...call seems to be >>> messing it up. >> >> I would call that "user error"; basically, using MMX instructions >> messes up the FP stack, and we assume the user is smart enough to make >> sure the two don't mix. > > More specifically, if you use MMX/3dNow intrinsics, you have to call "emms" at ABI boundaries. > > -Chris > Ok, now it makes sense. Thanks. Now that I know this is right, are these patches ok to commit? Or should I post them to the llvm-commits, and cfe-commits list? - Michael Spencer

I saw a message about testing 1.0.4 with --enable-3dnow (which I seem to have deleted). I just ran a full test suite on an Athlon XP system using 1.0.4 built with --enable-3dnow, and everything passed. -- - mdz

> -- Miroslav Lichvar <lichvarm@phoenix.inf.upol.cz> wrote: > On Tue, Dec 17, 2002 at 01:01:08PM -0800, Josh Coalson wrote: > > --- Miroslav Lichvar <lichvarm@phoenix.inf.upol.cz> wrote: > > > Ok, what about enabling the 3dnow function in libFLAC by default? > > > I think time has shown the function is bugfree... :) > > > > Yeah, I just haven't done it because I don't remember hearing > > feedback from others about using it (or maybe I just forgot... > > has anyone else built fla...

...39;s still some speed improvement that will cost another increase of the size of executable files (by 20-30 kB). What do you think? Also the new code requires AVX CPU/OS support detection code to be added to cpu.c I'd like to simplify it slightly further before this. For example, by removing 3DNow code because it's hardly relevant these days.

This patch removes 3DNow! support from libFLAC. -------------- next part -------------- A non-text attachment was scrubbed... Name: 01_rm-3dnow.zip Type: application/zip Size: 3767 bytes Desc: not available Url : http://lists.xiph.org/pipermail/flac-dev/attachments/20141003/03f241f3/attachment.zip

Are there any plans for Ogg Vorbis to support MMX/3dnow optimizations? I think this is the major reason why the decoding of mp3's is faster than ogg in XMMS. Regards, Charles -- The box saids Windows XP or better, so I installed Linux --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To...