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Synthesis support for SystemVerilog interfaces

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This time doing the changes mostly in AST before RTLIL generation
This commit is contained in:
Ruben Undheim 2018-10-11 23:33:31 +02:00
parent 9850de405a
commit 75009ada3c
10 changed files with 501 additions and 21 deletions
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133
frontends/ast/ast.cc
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@ -905,7 +905,7 @@ RTLIL::Const AstNode::realAsConst(int width)
// create a new AstModule from an AST_MODULE AST node
static AstModule* process_module(AstNode *ast, bool defer)
{
log_assert(ast->type == AST_MODULE);
log_assert(ast->type == AST_MODULE || ast->type == AST_INTERFACE);
if (defer)
log("Storing AST representation for module `%s'.\n", ast->str.c_str());
@ -916,6 +916,7 @@ static AstModule* process_module(AstNode *ast, bool defer)
current_module->ast = NULL;
current_module->name = ast->str;
current_module->attributes["\\src"] = stringf("%s:%d", ast->filename.c_str(), ast->linenum);
current_module->set_bool_attribute("\\cells_not_processed");
current_ast_mod = ast;
AstNode *ast_before_simplify = ast->clone();
@ -989,6 +990,8 @@ static AstModule* process_module(AstNode *ast, bool defer)
ignoreThisSignalsInInitial = RTLIL::SigSpec();
}
if (ast->type == AST_INTERFACE)
current_module->set_bool_attribute("\\is_interface");
current_module->ast = ast_before_simplify;
current_module->nolatches = flag_nolatches;
current_module->nomeminit = flag_nomeminit;
@ -1031,7 +1034,7 @@ void AST::process(RTLIL::Design *design, AstNode *ast, bool dump_ast1, bool dump
log_assert(current_ast->type == AST_DESIGN);
for (auto it = current_ast->children.begin(); it != current_ast->children.end(); it++)
{
if ((*it)->type == AST_MODULE)
if ((*it)->type == AST_MODULE || (*it)->type == AST_INTERFACE)
{
for (auto n : design->verilog_globals)
(*it)->children.push_back(n->clone());
@ -1083,8 +1086,123 @@ AstModule::~AstModule()
delete ast;
}
void AstModule::reprocess_module(RTLIL::Design *design, dict<RTLIL::IdString, RTLIL::Module*> local_interfaces)
{
bool is_top = false;
AstNode *new_ast = ast->clone();
for (auto &intf : local_interfaces) {
std::string intfname = intf.first.str();
RTLIL::Module *intfmodule = intf.second;
for (auto &wire_it : intfmodule->wires_){
AstNode *wire = new AstNode(AST_WIRE, new AstNode(AST_RANGE, AstNode::mkconst_int(wire_it.second->width -1, true), AstNode::mkconst_int(0, true)));
std::string newname = log_id(wire_it.first);
newname = intfname + "." + newname;
wire->str = newname;
new_ast->children.push_back(wire);
}
}
std::string original_name = this->name.str();
std::string changed_name = original_name + "_before_replacing_local_interfaces";
design->rename(this, changed_name);
this->set_bool_attribute("\\to_delete");
if (this->get_bool_attribute("\\initial_top")) {
this->attributes.erase("\\initial_top");
is_top = true;
}
AstModule *newmod = process_module(new_ast, false);
design->add(newmod);
RTLIL::Module* mod = design->module(original_name);
if (is_top)
mod->set_bool_attribute("\\top");
mod->set_bool_attribute("\\interfaces_replaced_in_module");
}
// create a new parametric module (when needed) and return the name of the generated module - WITH support for interfaces
RTLIL::IdString AstModule::derive(RTLIL::Design *design, dict<RTLIL::IdString, RTLIL::Const> parameters, dict<RTLIL::IdString, RTLIL::Module*> interfaces, bool mayfail)
{
AstNode *new_ast = NULL;
std::string modname = derive_common(design, parameters, &new_ast, mayfail);
// Since interfaces themselves may be instantiated with different parameters,
// "modname" must also take those into account, so that unique modules
// are derived for any variant of interface connections:
std::string interf_info = "";
bool has_interfaces = false;
for(auto &intf : interfaces) {
interf_info += log_id(intf.second->name);
has_interfaces = true;
}
if (has_interfaces)
modname += "$interfaces$" + interf_info;
if (!design->has(modname)) {
new_ast->str = modname;
for(auto &intf : interfaces) {
RTLIL::Module * intfmodule = intf.second;
std::string intfname = intf.first.str();
for (auto &wire_it : intfmodule->wires_){
AstNode *wire = new AstNode(AST_WIRE, new AstNode(AST_RANGE, AstNode::mkconst_int(wire_it.second->width -1, true), AstNode::mkconst_int(0, true)));
std::string origname = log_id(wire_it.first);
std::string newname = intfname + "." + origname;
wire->str = newname;
wire->is_input = true;
wire->is_output = true;
new_ast->children.push_back(wire);
}
}
design->add(process_module(new_ast, false));
design->module(modname)->check();
RTLIL::Module* mod = design->module(modname);
for(auto &intf : interfaces) {
if(mod->wires_.count(intf.first)) {
mod->wires_.erase(intf.first);
mod->fixup_ports();
RTLIL::Cell * new_subcell = mod->addCell(intf.first, intf.second->name);
new_subcell->set_bool_attribute("\\is_interface");
}
else {
log_error("No port with matching name found (%s) in %s. Stopping\n", log_id(intf.first), modname);
}
}
if (interfaces.size() > 0) {
mod->set_bool_attribute("\\interfaces_replaced_in_module");
}
} else {
log("Found cached RTLIL representation for module `%s'.\n", modname.c_str());
}
delete new_ast;
return modname;
}
// create a new parametric module (when needed) and return the name of the generated module - without support for interfaces
RTLIL::IdString AstModule::derive(RTLIL::Design *design, dict<RTLIL::IdString, RTLIL::Const> parameters, bool mayfail)
{
AstNode *new_ast = NULL;
std::string modname = derive_common(design, parameters, &new_ast, mayfail);
if (!design->has(modname)) {
new_ast->str = modname;
design->add(process_module(new_ast, false));
design->module(modname)->check();
} else {
log("Found cached RTLIL representation for module `%s'.\n", modname.c_str());
}
delete new_ast;
return modname;
}
// create a new parametric module (when needed) and return the name of the generated module
RTLIL::IdString AstModule::derive(RTLIL::Design *design, dict<RTLIL::IdString, RTLIL::Const> parameters, bool)
std::string AstModule::derive_common(RTLIL::Design *design, dict<RTLIL::IdString, RTLIL::Const> parameters, AstNode **new_ast_out, bool)
{
std::string stripped_name = name.str();
@ -1156,15 +1274,8 @@ RTLIL::IdString AstModule::derive(RTLIL::Design *design, dict<RTLIL::IdString, R
else
modname = "$paramod" + stripped_name + para_info;
if (!design->has(modname)) {
new_ast->str = modname;
design->add(process_module(new_ast, false));
design->module(modname)->check();
} else {
log("Found cached RTLIL representation for module `%s'.\n", modname.c_str());
}
delete new_ast;
(*new_ast_out) = new_ast;
return modname;
}