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Add "read_ilang -[no]overwrite" 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2018-12-23 15:45:09 +01:00
parent d938ce7ab6
commit 6dad191377
3 changed files with 54 additions and 4 deletions
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30
frontends/ilang/ilang_frontend.cc
View File

@ -44,11 +44,39 @@ struct IlangFrontend : public Frontend {
log("Load modules from an ilang file to the current design. (ilang is a text\n");
log("representation of a design in yosys's internal format.)\n");
log("\n");
log(" -nooverwrite\n");
log(" ignore re-definitions of modules. (the default behavior is to\n");
log(" create an error message if the existing module is not a blackbox\n");
log(" module, and overwrite the existing module if it is a blackbox module.)\n");
log("\n");
log(" -overwrite\n");
log(" overwrite existing modules with the same name\n");
log("\n");
}
void execute(std::istream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
ILANG_FRONTEND::flag_nooverwrite = false;
ILANG_FRONTEND::flag_overwrite = false;
log_header(design, "Executing ILANG frontend.\n");
extra_args(f, filename, args, 1);
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
std::string arg = args[argidx];
if (arg == "-nooverwrite") {
ILANG_FRONTEND::flag_nooverwrite = true;
ILANG_FRONTEND::flag_overwrite = false;
continue;
}
if (arg == "-overwrite") {
ILANG_FRONTEND::flag_nooverwrite = false;
ILANG_FRONTEND::flag_overwrite = true;
continue;
}
break;
}
extra_args(f, filename, args, argidx);
log("Input filename: %s\n", filename.c_str());
ILANG_FRONTEND::lexin = f;

2
frontends/ilang/ilang_frontend.h
View File

@ -32,6 +32,8 @@ YOSYS_NAMESPACE_BEGIN
namespace ILANG_FRONTEND {
extern std::istream *lexin;
extern RTLIL::Design *current_design;
extern bool flag_nooverwrite;
extern bool flag_overwrite;
}
YOSYS_NAMESPACE_END

26
frontends/ilang/ilang_parser.y
View File

@ -37,6 +37,8 @@ namespace ILANG_FRONTEND {
std::vector<std::vector<RTLIL::SwitchRule*>*> switch_stack;
std::vector<RTLIL::CaseRule*> case_stack;
dict<RTLIL::IdString, RTLIL::Const> attrbuf;
bool flag_nooverwrite, flag_overwrite;
bool delete_current_module;
}
using namespace ILANG_FRONTEND;
YOSYS_NAMESPACE_END
@ -93,18 +95,36 @@ design:
module:
TOK_MODULE TOK_ID EOL {
if (current_design->has($2))
rtlil_frontend_ilang_yyerror(stringf("ilang error: redefinition of module %s.", $2).c_str());
delete_current_module = false;
if (current_design->has($2)) {
RTLIL::Module *existing_mod = current_design->module($2);
if (!flag_overwrite && attrbuf.count("\\blackbox") && attrbuf.at("\\blackbox").as_bool()) {
log("Ignoring blackbox re-definition of module %s.\n", $2);
delete_current_module = true;
} else if (!flag_nooverwrite && !flag_overwrite && !existing_mod->get_bool_attribute("\\blackbox")) {
rtlil_frontend_ilang_yyerror(stringf("ilang error: redefinition of module %s.", $2).c_str());
} else if (flag_nooverwrite) {
log("Ignoring re-definition of module %s.\n", $2);
delete_current_module = true;
} else {
log("Replacing existing%s module %s.\n", existing_mod->get_bool_attribute("\\blackbox") ? " blackbox" : "", $2);
current_design->remove(existing_mod);
}
}
current_module = new RTLIL::Module;
current_module->name = $2;
current_module->attributes = attrbuf;
current_design->add(current_module);
if (!delete_current_module)
current_design->add(current_module);
attrbuf.clear();
free($2);
} module_body TOK_END {
if (attrbuf.size() != 0)
rtlil_frontend_ilang_yyerror("dangling attribute");
current_module->fixup_ports();
if (delete_current_module)
delete current_module;
current_module = nullptr;
} EOL;
module_body: