Re: gEDA-user: Math functions and PLI

[Stephen Williams <steve@xxxxxxxxxx>]

I believe the current Icarus Verilog vvp now has all the infrastructure
needed to support real-valued system functions, and there are some PLI2
functions that return real values. So the PLI1 support is just a matter
of providing the right translation layer code to make it work. Any
volunteers?

Larry Doolittle wrote:
> Matt -
> 
> On Sun, Dec 16, 2007 at 10:43:38PM -0800, Larry Doolittle wrote:
>> On Sun, Dec 16, 2007 at 06:19:38PM -0800, Matt Ettus wrote:
>>>    http://www.chris.spear.net/pli/math.htm
>> Unfortunately, when I go to use the result I still get the
>> messages that Matt reports.  Steve, what am I missing?
>> [patch to math.c]
> 
> Using that patch and the appended Makefile, I can get Icarus to at least
> attempt to load the VPI module.  Now the problem is that Icarus (git as
> of last week) does not support VPI routines of type 3 (userrealfunction).
> See line 104 of libveriuser/veriusertfs.c , and the results of
>   find verilog-0.9 -type f | xargs grep userrealfunction
> 
> The error messages from "vvp math.vvp" are:
> 
> veriusertfs: $exp, forcing forwref = true
> veriusertfs: $exp, unsupported type 3
> veriusertfs: $log, forcing forwref = true
> veriusertfs: $log, unsupported type 3
> veriusertfs: $log10, forcing forwref = true
> veriusertfs: $log10, unsupported type 3
> veriusertfs: $sin, forcing forwref = true
> veriusertfs: $sin, unsupported type 3
> veriusertfs: $sqrt, forcing forwref = true
> veriusertfs: $sqrt, unsupported type 3
> veriusertfs: $pow, forcing forwref = true
> veriusertfs: $pow, unsupported type 3
> $exp: This task not defined by any modules. I cannot compile it.
> $log: This task not defined by any modules. I cannot compile it.
> $log10: This task not defined by any modules. I cannot compile it.
> $log10: This task not defined by any modules. I cannot compile it.
> $sin: This task not defined by any modules. I cannot compile it.
> $sqrt: This task not defined by any modules. I cannot compile it.
> $pow: This task not defined by any modules. I cannot compile it.
> math.vvp: Program not runnable, 7 errors.


-- 
Steve Williams                "The woods are lovely, dark and deep.
steve at icarus.com           But I have promises to keep,
http://www.icarus.com         and lines to code before I sleep,
http://www.picturel.com       And lines to code before I sleep."


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