ast_code_genertor supports signed input and output

Author: shtaxxx

pyverilog/ast_code_generator/codegen.py

@@ -358,6 +358,7 @@ def visit_Ioport(self, node):
             'second' : '' if node.second is None else node.second.__class__.__name__.lower(),
             'name' : escape(node.first.name),
             'width' : '' if node.first.width is None else self.visit(node.first.width),
+            'signed' : node.first.signed or (node.second is not None and node.second.signed)
             }
         rslt = template.render(template_dict)
         return rslt

pyverilog/ast_code_generator/template/ioport.txt

@@ -1 +1 @@
-{{ first }} {% if second != '' %}{{ second }} {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}
+{{ first }} {% if second != '' %}{{ second }} {% endif %}{% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}