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mmsim_genplugin documentation for compiling C/C++ functions for VerilogA

ccsim

I've written a custom function in C++ that I need to compile using mmsim_genplugin. Is there detailed documentation on mmsim_genplugin? My searches haven't yielded results. 

Specifically, I'd like to know:

1) My function has one library dependency (armadillo), how do I include it? I can compile in gcc as follows:

g++ myfunction.cpp -std=c++17 -I <path_to_include_folder> -O3 -L <path_to_libraries_if_needed> -larmadillo -lopenblas

2) My function makes use of C++ features up to C++ 17. How can I confirm if mmsim_genplugin supports C++17?

Parents

  • The dependency isn't going to be with mmsim_genplugin, since that really just generates the GNUmakefile. The dependency is that the spectre version probably needs to use a compatible GCC version, and looking at the <SPECTRE231instDir>/tools/cdsgcc directory, the version that Spectre was built with was gcc 9.3 and that certainly supports C++ 17 (see https://gcc.gnu.org/projects/cxx-status.html#cxx17)

    Most likely you'd need to modify the makefile produced to add the references to your additional libraries, and you'd need to ensure the LD_LIBRARY_PATH is set appropriately so that the shared library will be found at run time.

    There's some information on mmsim_genplugin in the documentation (search in cdnshelp or cda, depending on the Spectre version, for mmsim_genplugin). Also this app note: Simulating C/C++ Objects with Spectre and AMS Designer

    If you have any trouble though, I would advise you to contact customer support (submit a case after logging in). I don't see lots of people linking in C/C++ code with Verilog-A, but it does happen now and again and going via customer support is probably your best bet.

    Andrew

Reply

  • The dependency isn't going to be with mmsim_genplugin, since that really just generates the GNUmakefile. The dependency is that the spectre version probably needs to use a compatible GCC version, and looking at the <SPECTRE231instDir>/tools/cdsgcc directory, the version that Spectre was built with was gcc 9.3 and that certainly supports C++ 17 (see https://gcc.gnu.org/projects/cxx-status.html#cxx17)

    Most likely you'd need to modify the makefile produced to add the references to your additional libraries, and you'd need to ensure the LD_LIBRARY_PATH is set appropriately so that the shared library will be found at run time.

    There's some information on mmsim_genplugin in the documentation (search in cdnshelp or cda, depending on the Spectre version, for mmsim_genplugin). Also this app note: Simulating C/C++ Objects with Spectre and AMS Designer

    If you have any trouble though, I would advise you to contact customer support (submit a case after logging in). I don't see lots of people linking in C/C++ code with Verilog-A, but it does happen now and again and going via customer support is probably your best bet.

    Andrew

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