Ruby: Add support for functional accesses

This patch rpovides functional access support in Ruby. Currently only
the M5Port of RubyPort supports functional accesses. The support for
functional through the PioPort will be added as a separate patch.

1 files changed, 12 insertions, 7 deletions

diff --git a/src/mem/slicc/ast/MemberExprAST.py b/src/mem/slicc/ast/MemberExprAST.py
index a13205252..412c178d8 100644
--- a/src/mem/slicc/ast/MemberExprAST.py
+++ b/src/mem/slicc/ast/MemberExprAST.py
@@ -49,10 +49,15 @@ class MemberExprAST(ExprAST):
         code.fix(fix)
 
         # Verify that this is a valid field name for this type
-        if self.field not in return_type.data_members:
-            self.error("Invalid object field: " +
-                       "Type '%s' does not have data member %s" % \
-                       (return_type, self.field))
-
-        # Return the type of the field
-        return return_type.data_members[self.field].type
+        if self.field in return_type.data_members:
+            # Return the type of the field
+            return return_type.data_members[self.field].type
+        else:
+            if "interface" in return_type:
+               interface_type = self.symtab.find(return_type["interface"]);
+               if self.field in interface_type.data_members:
+                   # Return the type of the field
+                   return interface_type.data_members[self.field].type
+        self.error("Invalid object field: " +
+                   "Type '%s' does not have data member %s" % \
+                   (return_type, self.field))