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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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25
kernel/yosys.cc
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@ -64,13 +64,8 @@
#endif
#ifdef WITH_PYTHON
#if PY_MAJOR_VERSION >= 3
# define INIT_MODULE PyInit_libyosys
extern "C" PyObject* INIT_MODULE();
#else
# define INIT_MODULE initlibyosys
extern "C" void INIT_MODULE();
#endif
extern "C" PyObject* PyInit_libyosys();
extern "C" PyObject* PyInit_pyosys();
#include <signal.h>
#endif
@ -189,6 +184,17 @@ int run_command(const std::string &command, std::function<void(const std::string
bool already_setup = false;
bool already_shutdown = false;
#ifdef WITH_PYTHON
// Include pyosys as a module so 'from pyosys import libyosys' also works
// in interpreter mode.
//
// This should not affect using wheels as the dylib has to actually be called
// pyosys.so for this module to be interacted with at all.
PYBIND11_MODULE(pyosys, m) {
m.add_object("libyosys", m.import("libyosys"));
}
#endif
void yosys_setup()
{
if(already_setup)
@ -199,11 +205,12 @@ void yosys_setup()
IdString::ensure_prepopulated();
#ifdef WITH_PYTHON
// With Python 3.12, calling PyImport_AppendInittab on an already
// Starting Python 3.12, calling PyImport_AppendInittab on an already
// initialized platform fails (such as when libyosys is imported
// from a Python interpreter)
if (!Py_IsInitialized()) {
PyImport_AppendInittab((char*)"libyosys", INIT_MODULE);
PyImport_AppendInittab((char*)"libyosys", PyInit_libyosys);
PyImport_AppendInittab((char*)"pyosys", PyInit_pyosys);
Py_Initialize();
PyRun_SimpleString("import sys");
signal(SIGINT, SIG_DFL);