[SI-LIST] Re: Xilinx IBIS AMI models with Agilent ADS
- From: Hermann Ruckerbauer <hermann.ruckerbauer@xxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 15 Nov 2011 07:37:49 +0100
Hello,
I'm with Colin when he stated, that 64bit refers to the OS System
address space. But now a second time the higher precision of 64bit
models is mentioned.
I expected, that both models can use the same Variable definitions, and
therefore can get the same accuracy independent of running on 32 or 64
bit OS.
Can anyone explain better on this one and give some background why he
would not use the same variable definition on the 32 bit OS ?
I'm not a programming guy and in my simply mind I expected both dll for
32 and 64 bit to be the same code, just a switch in the compiler would
be changed ....
Hermann
Our next Events:
================
Visit us on Embedded World 2012
Our location Hall 1 / Booth 509
Check our website or contact us for details
EKH - EyeKnowHow
Hermann Ruckerbauer
www.EyeKnowHow.de
Hermann.Ruckerbauer@xxxxxxxxxxxxx
Veilchenstrasse 1
94554 Moos
Tel.: +49 (0)9938 / 902 083
Mobile: +49 (0)176 / 787 787 77
Fax: +49 (0)3212 / 121 9008
schrieb signal integrity:
> Hi Istvan,
> We get this problem quite often when a user who has 32bit dll
> try to run simulation in Ansoft Designer on a 64bit machine. To solve this
> issue we provided an option to run simulation for these 32bit AMI models by
> running the 32bit version of solver by going into settings. If there is any
> such utility to use in your simulator than that would solve your issue.
> Regarding the use of mixing the 64bit and 32bit dll, as Todd said won't be
> good idea to mix them. Another reasoning is if you are using 64bit version
> which tend to provide with a higher level of precision then once you mix it
> with 32 bit it would be going to be limited by the precision of 32 bit
> model then.
>
> Regards,
>
> Shoaib Khan
> Applications Engineer
> ANSYS Inc.
> Shoaib.Khan@xxxxxxxxx
>
>
> On Mon, Nov 14, 2011 at 1:50 PM, Istvan Nagy <buenos@xxxxxxxxxxx> wrote:
>
>> Hi Todd,
>>
>> Thanks.
>> The thing about "64-bit" in my opinion, is that most computers sold in the
>> past 1-2 years (including the cheaper ones) have a 64-bit windows-7, and
>> the
>> programs we normally install on these are also 64-bit. At least when we
>> install a new program, we dont yet consider normally the simulation model
>> files that we want to run on it. Someone from Agilent told me that I had to
>> start the program in 32-bit mode to prevent crashing when using 32-bit
>> models. The program didnt give me this info in the error message. So at the
>> end there is an easy solution with ADS. If we have an RX model as a 32-bit
>> DLL and a TX model as a 64-bit DLL, then how should the simulator handle
>> this?
>>
>> Since you are from Sisoft, can I ask you about the availability of the
>> models for the general public? Or is it some sensitive stuff that I
>> shouldn't ask on a mailing list? I mean some Xilinx AMI models seem to be
>> available through Sisoft, but only for Sisoft customers? I'm not
>> complaining, just confused.
>>
>> Best regards,
>> Istvan Nagy
>>
>>
>>
>> -----Original Message-----
>> From: Todd Westerhoff
>> Sent: Monday, November 14, 2011 3:39 PM
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] Re: Xilinx IBIS AMI models with Agilent ADS
>>
>> Istvan,
>>
>> The Spartan 6 model I've seen is fully compliant with IBIS 5.0
>> specification
>> and should work in any IBIS-AMI compliant simulator.
>>
>> The issue of 32 vs. 64 bit .dll's is a bit nuanced. In general, 64 bits
>> are better than 32 bits, because that provides additional precision /
>> capacity, albeit at some cost (ensuring compatibility of hardware, O/S,
>> program and runtime libraries). In the particular case of AMI models, 64
>> bit operation doesn't buy us much because we don't need the extra precision
>> and the change in simulation performance is minimal. Thus, while 64 bit
>> .dll's sound like a great idea, they present potential compatibility issues
>> as Hermann noted. Note that the IBIS specification uses a declaration of
>> "Platform_Compiler_Bits" when pointing to the .dll, so a model declaration
>> ending in "_32" tells the simulator that the .dll has been compiled as a 32
>> bit object. It's possible (and seems probable) that the 64 bit simulator
>> you're using is ignoring that declaration, thus it loads the model anyway
>> and crashes trying to call it.
>>
>> If you have a 32 bit version of the simulator available, I'd use that
>> instead. I can't speak to the details of other people's simulators, but
>> in
>> general that shouldn't make a difference.
>>
>> For anyone wondering, 32 bit programs & run time libraries always work in a
>> 64 bit Windows O/S because 32 bit compatibility is built-in to the Windows
>> O/S. If you're running Linux, not all distributions include 32 bit support
>> by default, so you may need to load the appropriate O/S 32 bit package(s)
>> for your system.
>>
>> Todd.
>>
>> --
>>
>> Todd Westerhoff
>> VP, Software Products
>> SiSoft
>> 6 Clock Tower Place, Suite 250
>> Maynard, MA 01754
>> (978) 461-0449 x24
>> twesterh@xxxxxxxxxx
>> www.sisoft.com
>>
>>
>> -----Original Message-----
>> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
>> On
>> Behalf Of Istvan Nagy
>> Sent: Saturday, November 12, 2011 2:31 PM
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] Xilinx IBIS AMI models with Agilent ADS
>>
>> Hi Guys,
>>
>> How do you simulate Xilinx IBIS AMI models with Agilent ADS on a 64-bit PC?
>>
>> I am trying to evaluate the Agilent ADS-2011.05 (30-day trial) with one of
>> my previous designs containing a Xilinx Spartan-6 FPGA on it. I have a
>> 2.5Gbps PCIe and a 1.5Gbps Aurora link on it.
>> I have encountered a few problems, they seem to be related to model
>> availability.
>>
>> -Several models are not available from the Xilinx website, but only from
>> Sisoft. If I'm using Agilent software, so how could I get the models from
>> Sisoft? The Spartan-6 model package completely, and one of the files (.ibs)
>> from the Virtex-5-GTP model package (.zip) are missing from the xilinx
>> website.
>>
>> -The available models seem to have 32-bit DLLs which crashes the simulation
>> on my 64-bit windows-7 PC while running channel simulation. The only model
>> on the xilinx website without missing files is the Virtex-6 GTX transceiver
>> model, which is totally different than the device on my board (Sp-6 GTP),
>> but at least i could use it to check the capabilities of the ADS2011.
>>
>> Is there a solution for the above?
>> Why be so secretive around IBIS AMI models?
>> Is there an IBIS-AMI channel-sim tutorial for ADS?
>>
>> Regards,
>> Istvan Nagy
>> Hardware Design Engineer
>> Bluechip Technology
>>
>> ------------------------------------------------------------------
>> To unsubscribe from si-list:
>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>
>> or to administer your membership from a web page, go to:
>> //www.freelists.org/webpage/si-list
>>
>> For help:
>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>
>>
>> List technical documents are available at:
>> http://www.si-list.net
>>
>> List archives are viewable at:
>> //www.freelists.org/archives/si-list
>>
>> Old (prior to June 6, 2001) list archives are viewable at:
>> http://www.qsl.net/wb6tpu
>>
>>
>> ------------------------------------------------------------------
>> To unsubscribe from si-list:
>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>
>> or to administer your membership from a web page, go to:
>> //www.freelists.org/webpage/si-list
>>
>> For help:
>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>
>>
>> List technical documents are available at:
>> http://www.si-list.net
>>
>> List archives are viewable at:
>> //www.freelists.org/archives/si-list
>>
>> Old (prior to June 6, 2001) list archives are viewable at:
>> http://www.qsl.net/wb6tpu
>>
>>
>> ------------------------------------------------------------------
>> To unsubscribe from si-list:
>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>
>> or to administer your membership from a web page, go to:
>> //www.freelists.org/webpage/si-list
>>
>> For help:
>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>
>>
>> List technical documents are available at:
>> http://www.si-list.net
>>
>> List archives are viewable at:
>> //www.freelists.org/archives/si-list
>>
>> Old (prior to June 6, 2001) list archives are viewable at:
>> http://www.qsl.net/wb6tpu
>>
>>
>>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
