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pyosys: rewrite using pybind11

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- Rewrite all Python features to use the pybind11 library instead of boost::python.
  Unlike boost::python, pybind11 is a header-only library that is just included by Pyosys code, saving a lot of compile time on wheels.
- Factor out as much "translation" code from the generator into proper C++ files
- Fix running the embedded interpreter not supporting "from pyosys import libyosys as ys" like wheels
- Move Python-related elements to `pyosys` directory at the root of the repo
- Slight shift in bridging semantics:
  - Containers are declared as "opaque types" and are passed by reference to Python - many methods have been implemented to make them feel right at home without the overhead/ambiguity of copying to Python and then copying back after mutation
  - Monitor/Pass use "trampoline" pattern to support virual methods overridable in Python: virtual methods no longer require `py_` prefix
- Create really short test set for pyosys that just exercises basic functionality
This commit is contained in:
Mohamed Gaber 2025-09-21 22:36:27 +03:00
parent f7120e9c2a
commit 88be728353
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27 changed files with 2879 additions and 2674 deletions
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29
kernel/driver.cc
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@ -92,8 +92,9 @@ int main(int argc, char **argv)
yosys_banner();
yosys_setup();
#ifdef WITH_PYTHON
PyRun_SimpleString(("sys.path.append(\""+proc_self_dirname()+"\")").c_str());
PyRun_SimpleString(("sys.path.append(\""+proc_share_dirname()+"plugins\")").c_str());
py::object sys = py::module_::import("sys");
sys.attr("path").attr("append")(proc_self_dirname());
sys.attr("path").attr("append")(proc_share_dirname());
#endif
if (argc == 2)
@ -516,8 +517,9 @@ int main(int argc, char **argv)
yosys_setup();
#ifdef WITH_PYTHON
PyRun_SimpleString(("sys.path.append(\""+proc_self_dirname()+"\")").c_str());
PyRun_SimpleString(("sys.path.append(\""+proc_share_dirname()+"plugins\")").c_str());
py::object sys = py::module_::import("sys");
sys.attr("path").attr("append")(proc_self_dirname());
sys.attr("path").attr("append")(proc_share_dirname());
#endif
log_error_atexit = yosys_atexit;
@ -567,21 +569,18 @@ int main(int argc, char **argv)
#endif
} else if (scriptfile_python) {
#ifdef WITH_PYTHON
PyObject *sys = PyImport_ImportModule("sys");
py::list new_argv;
int py_argc = special_args.size() + 1;
PyObject *new_argv = PyList_New(py_argc);
PyList_SetItem(new_argv, 0, PyUnicode_FromString(scriptfile.c_str()));
new_argv.append(scriptfile);
for (int i = 1; i < py_argc; ++i)
PyList_SetItem(new_argv, i, PyUnicode_FromString(special_args[i - 1].c_str()));
new_argv.append(special_args[i - 1]);
PyObject *old_argv = PyObject_GetAttrString(sys, "argv");
PyObject_SetAttrString(sys, "argv", new_argv);
Py_DECREF(old_argv);
py::setattr(sys, "argv", new_argv);
PyObject *py_path = PyUnicode_FromString(scriptfile.c_str());
PyObject_SetAttrString(sys, "_yosys_script_path", py_path);
Py_DECREF(py_path);
PyRun_SimpleString("import os, sys; sys.path.insert(0, os.path.dirname(os.path.abspath(sys._yosys_script_path)))");
py::object Path = py::module_::import("pathlib").attr("Path");
py::object scriptfile_python_path = Path(scriptfile).attr("parent");
sys.attr("path").attr("insert")(0, py::str(scriptfile_python_path));
FILE *scriptfp = fopen(scriptfile.c_str(), "r");
if (scriptfp == nullptr) {