mirror of https://github.com/YosysHQ/yosys.git
141 lines
5.1 KiB
C++
141 lines
5.1 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "ast.h"
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#ifdef YOSYS_ENABLE_PLUGINS
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#include <dlfcn.h>
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#include <ffi.h>
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typedef void (*ffi_fptr) ();
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static ffi_fptr resolve_fn (std::string symbol_name)
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{
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if (symbol_name.find(':') != std::string::npos)
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{
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int pos = symbol_name.find(':');
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std::string plugin_name = symbol_name.substr(0, pos);
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std::string real_symbol_name = symbol_name.substr(pos+1);
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while (loaded_plugin_aliases.count(plugin_name))
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plugin_name = loaded_plugin_aliases.at(plugin_name);
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if (loaded_plugins.count(plugin_name) == 0)
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log_error("unable to resolve '%s': can't find plugin `%s'\n", symbol_name.c_str(), plugin_name.c_str());
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void *symbol = dlsym(loaded_plugins.at(plugin_name), real_symbol_name.c_str());
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if (symbol == nullptr)
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log_error("unable to resolve '%s': can't find symbol `%s' in plugin `%s'\n",
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symbol_name.c_str(), real_symbol_name.c_str(), plugin_name.c_str());
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return (ffi_fptr) symbol;
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}
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for (auto &it : loaded_plugins) {
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void *symbol = dlsym(it.second, symbol_name.c_str());
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if (symbol != nullptr)
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return (ffi_fptr) symbol;
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}
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void *symbol = dlsym(RTLD_DEFAULT, symbol_name.c_str());
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if (symbol != nullptr)
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return (ffi_fptr) symbol;
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log_error("unable to resolve '%s'.\n", symbol_name.c_str());
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}
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AST::AstNode *AST::dpi_call(const std::string &rtype, const std::string &fname, const std::vector<std::string> &argtypes, const std::vector<AstNode*> &args)
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{
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AST::AstNode *newNode = nullptr;
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union { double f64; float f32; int32_t i32; } value_store [args.size() + 1];
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ffi_type *types [args.size() + 1];
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void *values [args.size() + 1];
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ffi_cif cif;
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int status;
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log("Calling DPI function `%s' and returning `%s':\n", fname.c_str(), rtype.c_str());
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log_assert(SIZE(args) == SIZE(argtypes));
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for (int i = 0; i < SIZE(args); i++) {
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if (argtypes[i] == "real") {
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log(" arg %d (%s): %f\n", i, argtypes[i].c_str(), args[i]->asReal(args[i]->is_signed));
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value_store[i].f64 = args[i]->asReal(args[i]->is_signed);
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values[i] = &value_store[i].f64;
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types[i] = &ffi_type_double;
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} else if (argtypes[i] == "shortreal") {
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log(" arg %d (%s): %f\n", i, argtypes[i].c_str(), args[i]->asReal(args[i]->is_signed));
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value_store[i].f32 = args[i]->asReal(args[i]->is_signed);
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values[i] = &value_store[i].f32;
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types[i] = &ffi_type_double;
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} else if (argtypes[i] == "integer") {
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log(" arg %d (%s): %lld\n", i, argtypes[i].c_str(), (long long)args[i]->asInt(args[i]->is_signed));
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value_store[i].i32 = args[i]->asInt(args[i]->is_signed);
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values[i] = &value_store[i].i32;
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types[i] = &ffi_type_sint32;
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} else {
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log_error("invalid argtype '%s' for argument %d.\n", argtypes[i].c_str(), i);
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}
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}
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if (rtype == "integer") {
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types[args.size()] = &ffi_type_slong;
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values[args.size()] = &value_store[args.size()].i32;
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} else if (rtype == "shortreal") {
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types[args.size()] = &ffi_type_float;
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values[args.size()] = &value_store[args.size()].f32;
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} else if (rtype == "real") {
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types[args.size()] = &ffi_type_double;
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values[args.size()] = &value_store[args.size()].f64;
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} else {
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log_error("invalid rtype '%s'.\n", rtype.c_str());
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}
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if ((status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI, args.size(), types[args.size()], types)) != FFI_OK)
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log_error("ffi_prep_cif failed: status %d.\n", status);
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ffi_call(&cif, resolve_fn(fname.c_str()), values[args.size()], values);
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if (rtype == "real") {
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newNode = new AstNode(AST_REALVALUE);
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newNode->realvalue = value_store[args.size()].f64;
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log(" return realvalue: %g\n", newNode->asReal(true));
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} else if (rtype == "shortreal") {
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newNode = new AstNode(AST_REALVALUE);
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newNode->realvalue = value_store[args.size()].f32;
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log(" return realvalue: %g\n", newNode->asReal(true));
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} else {
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newNode = AstNode::mkconst_int(value_store[args.size()].i32, false);
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log(" return integer: %lld\n", (long long)newNode->asInt(true));
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}
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return newNode;
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}
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#else /* YOSYS_ENABLE_PLUGINS */
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AST::AstNode *AST::dpi_call(const std::string&, const std::string &fname, const std::vector<std::string>&, const std::vector<AstNode*>&)
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{
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log_error("Can't call DPI function `%s': this version of yosys is built without plugin support\n", fname.c_str());
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}
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#endif /* YOSYS_ENABLE_PLUGINS */
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