Added support for SystemVerilog packages with localparam definitions

frontends/ast/ast.cc

@@ -151,6 +151,7 @@ std::string AST::type2str(AstNodeType type)
 	X(AST_POSEDGE)
 	X(AST_NEGEDGE)
 	X(AST_EDGE)
+	X(AST_PACKAGE)
 #undef X
 	default:
 		log_abort();
@@ -996,6 +997,14 @@ void AST::process(RTLIL::Design *design, AstNode *ast, bool dump_ast1, bool dump
 			for (auto n : global_decls)
 				(*it)->children.push_back(n->clone());
 
+			for (auto n : design->packages){
+				for (auto o : n->children) {
+					AstNode *cloned_node = o->clone();
+					cloned_node->str = n->str + std::string("::") + cloned_node->str.substr(1);
+					(*it)->children.push_back(cloned_node);
+				}
+			}
+
 			if (flag_icells && (*it)->str.substr(0, 2) == "\\$")
 				(*it)->str = (*it)->str.substr(1);
 
@@ -1013,6 +1022,9 @@ void AST::process(RTLIL::Design *design, AstNode *ast, bool dump_ast1, bool dump
 
 			design->add(process_module(*it, defer));
 		}
+		else if ((*it)->type == AST_PACKAGE){
+			design->packages.push_back((*it)->clone());
+		}
 		else
 			global_decls.push_back(*it);
 	}

frontends/ast/ast.h

@@ -137,7 +137,9 @@ namespace AST
 
 		AST_POSEDGE,
 		AST_NEGEDGE,
-		AST_EDGE
+		AST_EDGE,
+
+		AST_PACKAGE
 	};
 
 	// convert an node type to a string (e.g. for debug output)

frontends/ast/genrtlil.cc

@@ -806,6 +806,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 	case AST_GENBLOCK:
 	case AST_GENIF:
 	case AST_GENCASE:
+	case AST_PACKAGE:
 		break;
 
 	// remember the parameter, needed for example in techmap

frontends/verilog/verilog_lexer.l

@@ -141,6 +141,8 @@ YOSYS_NAMESPACE_END
 "endfunction"  { return TOK_ENDFUNCTION; }
 "task"         { return TOK_TASK; }
 "endtask"      { return TOK_ENDTASK; }
+"package"      { SV_KEYWORD(TOK_PACKAGE); }
+"endpackage"   { SV_KEYWORD(TOK_ENDPACKAGE); }
 "parameter"    { return TOK_PARAMETER; }
 "localparam"   { return TOK_LOCALPARAM; }
 "defparam"     { return TOK_DEFPARAM; }
@@ -351,6 +353,8 @@ import[ \t\r\n]+\"(DPI|DPI-C)\"[ \t\r\n]+function[ \t\r\n]+ {
 "<<<" { return OP_SSHL; }
 ">>>" { return OP_SSHR; }
 
+"::"  { SV_KEYWORD(TOK_PACKAGESEP); }
+
 "+:" { return TOK_POS_INDEXED; }
 "-:" { return TOK_NEG_INDEXED; }
 

frontends/verilog/verilog_parser.y

@@ -102,6 +102,7 @@ static void free_attr(std::map<std::string, AstNode*> *al)
 %token <string> TOK_STRING TOK_ID TOK_CONST TOK_REALVAL TOK_PRIMITIVE
 %token ATTR_BEGIN ATTR_END DEFATTR_BEGIN DEFATTR_END
 %token TOK_MODULE TOK_ENDMODULE TOK_PARAMETER TOK_LOCALPARAM TOK_DEFPARAM
+%token TOK_PACKAGE TOK_ENDPACKAGE TOK_PACKAGESEP
 %token TOK_INPUT TOK_OUTPUT TOK_INOUT TOK_WIRE TOK_REG
 %token TOK_INTEGER TOK_SIGNED TOK_ASSIGN TOK_ALWAYS TOK_INITIAL
 %token TOK_BEGIN TOK_END TOK_IF TOK_ELSE TOK_FOR TOK_WHILE TOK_REPEAT
@@ -155,6 +156,7 @@ design:
 	task_func_decl design |
 	param_decl design |
 	localparam_decl design |
+	package design |
 	/* empty */;
 
 attr:
@@ -212,6 +214,14 @@ hierarchical_id:
 	TOK_ID {
 		$$ = $1;
 	} |
+	hierarchical_id TOK_PACKAGESEP TOK_ID {
+		if ($3->substr(0, 1) == "\\")
+			*$1 += "::" + $3->substr(1);
+		else
+			*$1 += "::" + *$3;
+		delete $3;
+		$$ = $1;
+	} |
 	hierarchical_id '.' TOK_ID {
 		if ($3->substr(0, 1) == "\\")
 			*$1 += "." + $3->substr(1);
@@ -311,6 +321,25 @@ module_arg:
 		do_not_require_port_stubs = true;
 	};
 
+package:
+	attr TOK_PACKAGE TOK_ID {
+		AstNode *mod = new AstNode(AST_PACKAGE);
+		ast_stack.back()->children.push_back(mod);
+		ast_stack.push_back(mod);
+		current_ast_mod = mod;
+		mod->str = *$3;
+		append_attr(mod, $1);
+	} ';' package_body TOK_ENDPACKAGE {
+		ast_stack.pop_back();
+		current_ast_mod = NULL;
+	};
+
+package_body:
+	package_body package_body_stmt |;
+
+package_body_stmt:
+	localparam_decl;
+
 non_opt_delay:
 	'#' '(' expr ')' { delete $3; } |
 	'#' '(' expr ':' expr ':' expr ')' { delete $3; delete $5; delete $7; };

kernel/rtlil.cc

@@ -304,6 +304,8 @@ RTLIL::Design::~Design()
 {
 	for (auto it = modules_.begin(); it != modules_.end(); ++it)
 		delete it->second;
+	for (auto n : packages)
+		delete n;
 }
 
 RTLIL::ObjRange<RTLIL::Module*> RTLIL::Design::modules()

kernel/rtlil.h

@@ -18,6 +18,7 @@
  */
 
 #include "kernel/yosys.h"
+#include "frontends/ast/ast.h"
 
 #ifndef RTLIL_H
 #define RTLIL_H
@@ -792,6 +793,7 @@ struct RTLIL::Design
 
 	int refcount_modules_;
 	dict<RTLIL::IdString, RTLIL::Module*> modules_;
+	std::vector<AST::AstNode*> packages;
 
 	std::vector<RTLIL::Selection> selection_stack;
 	dict<RTLIL::IdString, RTLIL::Selection> selection_vars;