256 lines
11 KiB
C++
256 lines
11 KiB
C++
/* @file pyjit.cpp */
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#include "pyjit.hpp"
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#include "xo/pyexpression/pyexpression.hpp"
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#include "xo/jit/MachPipeline.hpp"
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#include "xo/pyutil/pycaller.hpp"
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#include "xo/pyutil/pyutil.hpp"
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#include <pybind11/stl.h>
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namespace xo {
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#ifdef OBSOLETE
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struct XferDbl2DblFn : public ref::Refcount {
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using fptr_type = double (*) (double);
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explicit XferDbl2DblFn(fptr_type fptr) : fptr_{fptr} {}
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double operator() (double x) { return (*fptr_)(x); }
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fptr_type fptr_;
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}; /*XferDbl2DblFn*/
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struct XferDblDbl2DblFn : public ref::Refcount {
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using fptr_type = double (*) (double, double);
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explicit XferDblDbl2DblFn(fptr_type fptr) : fptr_{fptr} {}
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double operator() (double x, double y) { return (*fptr_)(x, y); }
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fptr_type fptr_;
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}; /*XferDblDbl2DblFn*/
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#endif
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namespace jit {
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using xo::ast::Expression;
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using xo::pyutil::pycaller_base;
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using xo::pyutil::pycaller;
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using xo::ref::rp;
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//using xo::ref::Refcount;
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using xo::ref::unowned_ptr;
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namespace py = pybind11;
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/** storage for pycaller glue functions for different function signatures.
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* each pycaller instance embodies captures a canonical (architecture-dependent)
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* calling sequence for a C/C++ function with that signature.
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**/
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struct pycaller_store {
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public:
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/** singleton instance **/
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static pycaller_store * instance() { return &s_instance; }
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/** establish caller for signature @p prototype_str.
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* This needs to be called at most once for each distinct signature.
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*
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* Although it takes module as argument, the module being used
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* doesn't (shoudn't ??) matter
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**/
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template <typename Retval, typename... Args>
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pycaller_base::factory_function_type
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require_prototype(py::module & m,
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const std::string & prototype_str)
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{
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using caller_type = pycaller<Retval, Args...>;
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caller_type::declare_once(m);
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/* factory function takes function pointer of type
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* Retval(*)(Args...)
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* and returns new instance of caller_type for that function
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*/
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auto ix = pycaller_map_.find(prototype_str);
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auto retval = &caller_type::make;
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if(ix == pycaller_map_.end())
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pycaller_map_[prototype_str] = retval;
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return retval;
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}
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/** lookup caller for signature @p prototype_str **/
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pycaller_base::factory_function_type
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lookup_prototype(const std::string & prototype_str) const
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{
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auto ix = pycaller_map_.find(prototype_str);
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if (ix == pycaller_map_.end())
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return nullptr;
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else
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return ix->second;
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}
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private:
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static pycaller_store s_instance;
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/** map prototype string to pycaller factory for that prototype.
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* For example
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* "double(double)" -> pycaller<double,double>()
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**/
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std::unordered_map<std::string,
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pycaller_base::factory_function_type> pycaller_map_;
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}; /*pycaller_store*/
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pycaller_store
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pycaller_store::s_instance;
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PYBIND11_MODULE(XO_PYJIT_MODULE_NAME(), m) {
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// e.g. for xo::ast::Expression
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XO_PYEXPRESSION_IMPORT_MODULE(); // py::module_::import("pyexpression");
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m.doc() = "pybind11 plugin for xo-jit";
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pycaller_store::instance()
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->require_prototype<double, double>(m, "double (*)(double)");
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pycaller_store::instance()
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->require_prototype<double, double, double>(m, "double (*)(double,double)");
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//pycaller<double, double>::declare_once(m);
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//pycaller<double, double, double>::declare_once(m);
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py::class_<MachPipeline, rp<MachPipeline>>(m, "MachPipeline")
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.def_static("make", &MachPipeline::make,
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py::doc("Create machine pipeline for in-process code generation"
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" and execution. Not threadsafe.\n"
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"Does not share resources with any other instance"))
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.def_property_readonly("target_triple", &MachPipeline::target_triple,
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py::doc("string describing target host for code generation"))
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.def("get_function_name_v", &MachPipeline::get_function_name_v,
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py::doc("get vector of function names defined in jit module"))
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.def("dump_execution_session", &MachPipeline::dump_execution_session,
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py::doc("write to console with state of all jit-owned dynamic libraries"))
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.def("codegen",
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[](MachPipeline & jit, const rp<Expression> & expr) {
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return jit.codegen(expr.borrow());
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},
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py::arg("x"),
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py::doc("generate llvm (IR) code for Expression x"),
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/* we're assuming llvm-generated code lives for as long as the Jit
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* instance that created it.
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*
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* RC 14jun2024 - I think this is true, modulo use of llvm resource trackers.
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*/
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py::return_value_policy::reference_internal)
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.def("machgen_current_module", &MachPipeline::machgen_current_module,
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py::doc("Make current module available for execution via the jit.\n"
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"Adds all functions generated since last call to this method."))
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.def("dump_current_module", &MachPipeline::dump_current_module,
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py::doc("Dump contents of current module to console"))
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#ifdef OBSOLETE
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/* double -> double */
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.def("lookup_dbl2dbl_fn",
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[](MachPipeline & jit, const std::string & symbol) {
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auto llvm_addr = jit.lookup_symbol(symbol);
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auto fn_addr = llvm_addr.toPtr<double (*) (double)>();
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return new XferDbl2DblFn(fn_addr);
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})
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/* (double x double) -> double */
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.def("lookup_dbldbl2dbl_fn",
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[](MachPipeline & jit, const std::string & symbol) {
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auto llvm_addr = jit.lookup_symbol(symbol);
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auto fn_addr = llvm_addr.toPtr<double (*) (double, double)>();
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return new XferDblDbl2DblFn(fn_addr);
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})
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#endif
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.def("lookup_fn",
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[](MachPipeline & jit, const std::string & prototype, const std::string & symbol) -> pycaller_base* {
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auto llvm_addr = jit.lookup_symbol(symbol);
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/* llvm doesn't know the actual function signature,
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* so any function type will appear to succeed here.
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* We cast to particular function type within the pycaller<..> template
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*/
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if (llvm_addr) {
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auto fn_addr = llvm_addr.get().toPtr<void(*)()>();
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/* note: llvm_addr.toPtr<..> always succeeds,
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* event if pointer refers to an object of incompatible type
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*
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* note: return value policy is for python to own the wrapper
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*
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* note: pycaller signatures need to have been introduced in advance
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* (in practice determined at compile time,
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* since they encode a function-signature-specific calling sequence)
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* by calling pycaller_store::instance()->require_prototype<Retval, Args...>(prototype);
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*/
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auto factory = pycaller_store::instance()->lookup_prototype(prototype);
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if (!factory) {
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throw std::runtime_error(tostr("MachPipeline.lookup_fn: unknown function prototype",
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xtag("p", prototype)));
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}
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return (*factory)(fn_addr);
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} else {
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throw std::runtime_error(tostr("MachPipeline.lookup_fn: lookup on symbol S failed",
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xtag("S", symbol)));
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}
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#ifdef OBSOLETE
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if((prototype == "double(double,double)") || (prototype == "double(*)(double,double)")) {
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return new pycaller<double, double, double>(fn_addr);
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} else if ((prototype == "double(double)") || (prototype == "double(*)(double)")) {
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return new pycaller<double, double>(fn_addr);
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} else {
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throw std::runtime_error(tostr("MachPipeline.lookup_fn: unknown function prototype",
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xtag("p", prototype)));
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}
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#endif
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})
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;
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#ifdef OBSOLETE
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py::class_<XferDbl2DblFn, rp<XferDbl2DblFn>>(m, "XferDbl2DblFn")
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.def("__call__",
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[](XferDbl2DblFn & self, double x) { return self(x); }
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)
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;
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py::class_<XferDblDbl2DblFn, rp<XferDblDbl2DblFn>>(m, "XferDblDbl2DblFn")
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.def("__call__",
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[](XferDblDbl2DblFn & self, double x, double y) { return self(x, y); }
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)
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;
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#endif
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py::class_<llvm::Value,
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unowned_ptr<llvm::Value>>(m, "llvm_Value")
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.def("print",
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[](llvm::Value & x) {
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std::string buf;
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llvm::raw_string_ostream ss(buf);
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x.print(ss);
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return buf;
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})
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// .def("__repr__",
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// &Jit::display_string)
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;
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}
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} /*namespace jit*/
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} /*namespace xo*/
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/* end pyjit.cpp */
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