Fix: default func-of reg-name to current CSR's reg-name when func-of-field-name is set without func-of-reg-name

Agent-Logs-Url: https://github.com/riscv/docs-resources/sessions/58a81ebd-dcc0-4c02-b61f-7e78cc9f766f

Co-authored-by: james-ball-qualcomm <140646808+james-ball-qualcomm@users.noreply.github.com>

Author: Copilot

tools/create_csr_appendix.py

@@ -248,7 +248,7 @@ def render_type_cell(csr: Dict[str, Any]) -> str:
         base_reg_name: str = ""
         if isinstance(func_of_reg_name, str) and func_of_reg_name:
             base_reg_name = func_of_reg_name
-        elif isinstance(func_of_field_name, str) and func_of_field_name:
+        else:
             reg_name = csr.get("reg-name")
             if isinstance(reg_name, str) and reg_name:
                 base_reg_name = reg_name

tools/create_params.py

@@ -1235,13 +1235,22 @@ def html_csr_table_row(f, csr: Dict[str, Any], chapter_name: Optional[str]):
         isinstance(func_of_field_name, str)
         and func_of_field_name
     ):
-        func_of_target = ""
+        # Determine the base register name for func-of:
+        # 1. Prefer an explicit func-of-reg-name if provided.
+        # 2. Otherwise, when only func-of-field-name is given, default to this CSR's reg-name.
+        base_reg_name = ""
         if isinstance(func_of_reg_name, str) and func_of_reg_name:
-            func_of_target = func_of_reg_name
+            base_reg_name = func_of_reg_name
+        else:
+            if isinstance(reg_name, str) and reg_name:
+                base_reg_name = reg_name
+
+        func_of_target = base_reg_name
         if isinstance(func_of_field_name, str) and func_of_field_name:
             if func_of_target:
                 func_of_target = f"{func_of_target}.{func_of_field_name}"
             else:
+                # No usable register name; fall back to just the field name.
                 func_of_target = func_of_field_name
         type_display = f"{type_display}<br>func-of: {func_of_target}"