[LLVMdev] [fwd] LLVA, TAO Intent, Morphun, DualCor

Mon Feb 6 07:27:01 PST 2006

Mike Emmel wrote:
> Is the source code for llva available esp the linux kernel port.
> Is there a project page for llva ?

The source code for Rob's vector work is available as a CVS branch of 
the LLVM source code.  Please see 
http://lists.cs.uiuc.edu/pipermail/llvmdev/2005-October/004890.html if 
you're interested in getting a copy.

The code for the LLVA-OS extensions (and the LLVA-OS Linux port) are not 
publicly available at this time.  Some of the LLVA-OS extensions may 
find their way into LLVM in the future.  As for the LLVA-OS Linux port, 
we may release that at some point, but I can't make any promises about 
it at the moment.

The LLVA work doesn't have its own web page, currently.  However, if 
you're interested, there is a paper on LLVA on the LLVM publication page 
(http://llvm.cs.uiuc.edu/pubs/2003-10-01-LLVA.html).

Sorry to disappoint.
:(

-- John T.

> 
> Mike
> 
> 
> On 2/3/06, John Criswell <criswell at cs.uiuc.edu> wrote:
> 
>>Misha Brukman wrote:
>>
>>>I don't know the current status of the LLVA project, so I will let the
>>>current developers chime in.  Please send all LLVM and LLVA questions to
>>>llvmdev at cs.uiuc.edu .
>>
>>My apologies for the late reply.
>>
>>
>>>----- Forwarded message from N O S P A M <ti_dak at yahoo.com> -----
>>>
>>>Date: Tue, 17 Jan 2006 09:47:32 -0800 (PST)
>>>From: N O S P A M <ti_dak at yahoo.com>
>>>Subject: LLVA, TAO Intent, Morphun, DualCor
>>>
>>>Hello
>>>I want to ask about LLVA project:
>>>1. Is there any LLVA implementation for PowerPC, MIPS,
>>>SPARC etc?
>>
>>It depends on what aspect of LLVA you are refering to, and whether you
>>mean LLVM or LLVA.
>>
>>LLVM is the Low Level Virtual Machine (a compiler infastructure).  The
>>LLVM tools will run on most UNIX platforms (I believe there is some
>>support for Windows as well).  The LLVM JIT and static code generators
>>support x86, Sparc, and PowerPC, and there is some support for Itanium
>>and Alpha.  There is also a C-Backend which allows LLVM to generate
>>native code for platforms which do not have their own code generators.
>>See http://llvm.cs.uiuc.edu/docs/GettingStarted.html for more
>>information on supported platforms.
>>
>>The LLVA project is a set of research projects that aims to make the
>>LLVM instruction set the sole interface between the entire software
>>stack (OS, libraries, applications) and the hardware.
>>
>>One LLVA project is the LLVA-OS project, which adds extensions to the
>>original LLVM instruction set to support operating system code.  I'm the
>>primary person working on this project.  It currently works only on x86.
>>
>>Another LLVA project (I think it's an LLVA project, anyway) is the
>>vector instruction work being done by Rob Bocchino (which is different
>>from LLVM's current vector support).  I'll let Rob comment on what
>>platforms his work currently supports.
>>
>>
>>>2. What is the comparison with TAOS or TAO Intent,
>>>Morphun etc?
>>>
>>>http://www.tao-group.com
>>>
>>>http://www.synergenix.se/
>>>
>>>http://www.mascotcapsule.com/
>>
>>I am not familiar with these projects; if you give me a brief
>>description of what they're about, I might be able to give you some
>>general comparisons between them and LLVA.
>>
>>
>>>3. There is a strange handheld PDA/PC combo from
>>>DualCor with 2 types of CPU in 1 system.
>>>
>>>http://www.dualcor.com
>>>
>>>If they can install Linux on both Xscale (ARM) and VIA
>>>C7 (X86), is it possible to run LLVA on both CPU?
>>
>>It should be possible to run the LLVM tools on both processors.
>>However, LLVM currently does not have an XScale code generator, so you
>>will need to use the C backend to generate code that runs on the XScale.
>>  JIT compilation would work on the x86, but would not work on the XScale.
>>
>>Of course, you could write your own XScale backend.  Contributions are
>>welcome.
>>:)
>>
>>
>>>If LLVA is possible, is it possible to create
>>>Cluster/Multi processor system with the 2 CPU and run
>>>the same LLVM program on both CPU?
>>
>>LLVA is not currently possible, but from the sounds of it, you don't
>>need it.  I think LLVM is what you want.
>>
>>As far as whether LLVM can run the same bytecode on two different
>>processors, the answer is: it depends.
>>
>>If the original program is portable, then the same bytecode will work on
>>both the XScale and the x86.  This generally requires that the program
>>not need to know pointer size or processor endianness.
>>
>>If the original program is non-portable (e.g. it relies on the
>>processor's endianness or pointer size), then the LLVM bytecode will not
>>work on a machine with different characteristics.
>>
>>For example, the echo command would be portable, but the telnet command
>>would not be.  The echo command does not use endianness or pointer size,
>>but the telnet command does.
>>
>>LLVM bytecode is not like Java bytecode: it does not give you automatic
>>portability.  Portability is up to the application and programming language.
>>
>>
>>>Thank you
>>>Best regards.
>>>
>>>----- End forwarded message -----
>>>
>>
>>Please email llvmdev at cs.uiuc.edu if you have any further questions or
>>anything here is unclear.
>>
>>Regards,
>>
>>-- John T.
>>
>>--
>>John T. Criswell
>>Research Programmer
>>University of Illinois at Urbana-Champaign
>>"It's today!" said Piglet. "My favorite day," said Pooh.
>>
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>>
> 
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-- 
John T. Criswell
Research Programmer
University of Illinois at Urbana-Champaign
"It's today!" said Piglet. "My favorite day," said Pooh.