fix extension merge and add name and encoding conflict checking (risc…

…v#116)

* fix extension merge and add name and encoding conflict checking

* fix comments

* uniform code's indentation

parse.py

@@ -133,6 +133,16 @@ def process_enc_line(line, ext):
 
     return (name, single_dict)
 
+def same_base_ext (ext_name, ext_name_list):
+    type1 = ext_name.split("_")[0]
+    for ext_name1 in ext_name_list:
+        type2 = ext_name1.split("_")[0]
+        # "rv" mean insn for rv32 and rv64
+        if (type1 == type2 or
+            (type2 == "rv" and (type1 == "rv32" or type1 == "rv64")) or
+            (type1 == "rv" and (type2 == "rv32" or type2 == "rv64"))):
+            return True
+    return False
 
 def create_inst_dict(file_filter, include_pseudo=False, include_pseudo_ops=[]):
     '''
@@ -205,20 +215,38 @@ def create_inst_dict(file_filter, include_pseudo=False, include_pseudo_ops=[]):
             # call process_enc_line to get the data about the current
             # instruction
             (name, single_dict) = process_enc_line(line, f)
+            ext_name = f.split("/")[-1]
 
             # if an instruction has already been added to the filtered
             # instruction dictionary throw an error saying the given
             # instruction is already imported and raise SystemExit
             if name in instr_dict:
                 var = instr_dict[name]["extension"]
-                if instr_dict[name]['encoding'] != single_dict['encoding']:
+                if same_base_ext(ext_name, var):
+                    # disable same names on the same base extensions
                     err_msg = f'instruction : {name} from '
-                    err_msg += f'{f.split("/")[-1]} is already '
-                    err_msg += f'added from {var} but each have different encodings for the same instruction'
+                    err_msg += f'{ext_name} is already '
+                    err_msg += f'added from {var} in same base extensions'
                     logging.error(err_msg)
                     raise SystemExit(1)
-                instr_dict[name]['extension'].append(single_dict['extension'])
-
+                elif instr_dict[name]['encoding'] != single_dict['encoding']:
+                    # disable same names with different encodings on different base extensions
+                    err_msg = f'instruction : {name} from '
+                    err_msg += f'{ext_name} is already '
+                    err_msg += f'added from {var} but each have different encodings in different base extensions'
+                    logging.error(err_msg)
+                    raise SystemExit(1)
+                instr_dict[name]['extension'].extend(single_dict['extension'])
+            else:
+              for key in instr_dict:
+                  item = instr_dict[key]
+                  if item["encoding"] == single_dict['encoding'] and same_base_ext(ext_name, item["extension"]):
+                      # disable different names with same encodings on the same base extensions
+                      err_msg = f'instruction : {name} from '
+                      err_msg += f'{ext_name} has the same encoding with instruction {key} '
+                      err_msg += f'added from {item["extension"]} in same base extensions'
+                      logging.error(err_msg)
+                      raise SystemExit(1)
             # update the final dict with the instruction
             instr_dict[name] = single_dict