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diff --git a/src/systemc/dt/fx/sc_fxdefs.cc b/src/systemc/dt/fx/sc_fxdefs.cc
new file mode 100644
index 000000000..4a9e7458f
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+++ b/src/systemc/dt/fx/sc_fxdefs.cc
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+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_fxdefs.cpp -
+
+  Original Author: Martin Janssen, Synopsys, Inc.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+
+// $Log: sc_fxdefs.cpp,v $
+// Revision 1.1.1.1  2006/12/15 20:20:04  acg
+// SystemC 2.3
+//
+// Revision 1.3  2006/01/13 18:53:57  acg
+// Andy Goodrich: added $Log command so that CVS comments are reproduced in
+// the source.
+//
+
+#include "systemc/ext/dt/fx/sc_fxdefs.hh"
+
+namespace sc_dt
+{
+
+// ----------------------------------------------------------------------------
+//  ENUM : sc_enc
+//
+//  Enumeration of sign encodings.
+// ----------------------------------------------------------------------------
+
+const std::string
+to_string(sc_enc enc)
+{
+    switch (enc) {
+        case SC_TC_:
+            return std::string("SC_TC_");
+        case SC_US_:
+            return std::string("SC_US_");
+        default:
+            return std::string("unknown");
+    }
+}
+
+// ----------------------------------------------------------------------------
+//  ENUM : sc_q_mode
+//
+//  Enumeration of quantization modes.
+// ----------------------------------------------------------------------------
+
+const std::string
+to_string(sc_q_mode q_mode)
+{
+    switch (q_mode) {
+        case SC_RND:
+            return std::string("SC_RND");
+        case SC_RND_ZERO:
+            return std::string("SC_RND_ZERO");
+        case SC_RND_MIN_INF:
+            return std::string("SC_RND_MIN_INF");
+        case SC_RND_INF:
+            return std::string("SC_RND_INF");
+        case SC_RND_CONV:
+            return std::string("SC_RND_CONV");
+        case SC_TRN:
+            return std::string("SC_TRN");
+        case SC_TRN_ZERO:
+            return std::string("SC_TRN_ZERO");
+        default:
+            return std::string("unknown");
+    }
+}
+
+// ----------------------------------------------------------------------------
+//  ENUM : sc_o_mode
+//
+//  Enumeration of overflow modes.
+// ----------------------------------------------------------------------------
+
+const std::string
+to_string(sc_o_mode o_mode)
+{
+    switch (o_mode) {
+        case SC_SAT:
+            return std::string("SC_SAT");
+        case SC_SAT_ZERO:
+            return std::string("SC_SAT_ZERO");
+        case SC_SAT_SYM:
+            return std::string("SC_SAT_SYM");
+        case SC_WRAP:
+            return std::string("SC_WRAP");
+        case SC_WRAP_SM:
+            return std::string("SC_WRAP_SM");
+        default:
+            return std::string("unknown");
+    }
+}
+
+
+// ----------------------------------------------------------------------------
+//  ENUM : sc_switch
+//
+//  Enumeration of switch states.
+// ----------------------------------------------------------------------------
+
+const std::string
+to_string(sc_switch sw)
+{
+    switch (sw) {
+        case SC_OFF:
+            return std::string("SC_OFF");
+        case SC_ON:
+            return std::string("SC_ON");
+        default:
+            return std::string("unknown");
+    }
+}
+
+
+// ----------------------------------------------------------------------------
+//  ENUM : sc_fmt
+//
+//  Enumeration of formats for character string conversion.
+// ----------------------------------------------------------------------------
+
+const std::string
+to_string(sc_fmt fmt)
+{
+    switch (fmt) {
+        case SC_F:
+            return std::string("SC_F");
+        case SC_E:
+            return std::string("SC_E");
+        default:
+            return std::string("unknown");
+    }
+}
+
+} // namespace sc_dt