Re: [myhdl-list] OSS CVC vpi module

[Christopher F. <chr...@gm...>]

On 12/16/2014 9:46 AM, Paul.Y.Zhang wrote:
> Hi, Chris,
>
> Excuse me, I am not very familar with the PLI/VPI technology. I do not
> see any tf_ functions in "myhdl_vpi.c" codes. Waiting for your progress.
>
> - Paul

I didn't look ... I wonder what Steve was referring to
then?

.chris

>
> 在 2014/12/16 22:58, Christopher Felton 写道:
>> On 12/13/2014 7:43 PM, Paul.Y.Zhang wrote:
>>> neccHi,
>>>
>>> I post the cver vpi module (cosimulation/cver/myhdl_vpi.c) to Steve
>>> Meyer (the author of OSS CVC?), to get help of the memory leak issue.
>>> Got the below replay:
>>>
>>>       I assume calltf means the PLI uses the old tf_ interface.  You need to
>>> translate (or find) a version of your myhdl PLI coded in vpi_.  tf_ is obsolete
>>> old 1990s Verilog XL PLI that is deprecated (removed from) IEEE 1364 2005.
>>> The reason tf_ is removed is that it just grew in Cadence XL so nobody could
>>> duplicate behavior.
>> According to the 1364-2005 LRM [1] which contains the
>> PLI/VPI definition, indicates the tf_ functions are
>> deprecated (section 24).
>>
>> Wow - I am a little slow to follow this thread, I didn't
>> realize that the Tachyon re-opened/released their
>> simulator, originally they open-sourced GPLCVER [2] and
>> now they open-sourced CVC [3].  This is pretty amazing
>> because CVC is fast and a great companion with MyHDL (IMO).
>>
>> I will try and experiment replacing the tf_ functions
>> with the OSS CVC and see if the leak can be resolved.
>>
>> Regards,
>> Chris
>>
>>
>> [1] http://ieeexplore.ieee.org/servlet/opac?punumber=10779
>>        (probably can alos be found by googling, note "Verilog"
>>         has been merged with SV in the 1800 standard ...)
>>
>> [2] http://sourceforge.net/projects/gplcver/
>>
>> [3] http://www.tachyon-da.com/
>>
>>
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>