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diff --git a/src/mem/slicc/ast/InfixOperatorExprAST.cc b/src/mem/slicc/ast/InfixOperatorExprAST.cc
new file mode 100644
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+++ b/src/mem/slicc/ast/InfixOperatorExprAST.cc
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * InfixOperatorExprAST.C
+ *
+ * Description: See InfixOperatorExprAST.h
+ *
+ * $Id: InfixOperatorExprAST.C,v 3.2 2004/01/31 20:46:15 milo Exp $
+ *
+ */
+
+#include "InfixOperatorExprAST.hh"
+
+InfixOperatorExprAST::InfixOperatorExprAST(ExprAST* left_ptr,
+                                           string* op_ptr,
+                                           ExprAST* right_ptr)
+  : ExprAST()
+{
+  m_left_ptr = left_ptr;
+  m_op_ptr = op_ptr;
+  m_right_ptr = right_ptr;
+}
+
+InfixOperatorExprAST::~InfixOperatorExprAST()
+{
+  delete m_left_ptr;
+  delete m_op_ptr;
+  delete m_right_ptr;
+}
+
+Type* InfixOperatorExprAST::generate(string& code) const
+{
+  code += "(";
+  Type* left_type_ptr = m_left_ptr->generate(code);
+  code += " " + *m_op_ptr + " ";
+  Type* right_type_ptr = m_right_ptr->generate(code);
+  code += ")";
+
+  string inputs, output;
+  // Figure out what the input and output types should be
+  if ((*m_op_ptr == "==" ||
+       *m_op_ptr == "!=")) {
+    output = "bool";
+    if (left_type_ptr != right_type_ptr) {
+      error("Type mismatch: left & right operand of operator '" + *m_op_ptr +
+            "' must be the same type." +
+            "left: '" + left_type_ptr->toString() +
+            "', right: '" + right_type_ptr->toString() + "'");
+    }
+  } else {
+    if ((*m_op_ptr == "&&" ||
+         *m_op_ptr == "||")) {
+      // boolean inputs and output
+      inputs = "bool";
+      output = "bool";
+    } else if ((*m_op_ptr == "==" ||
+                *m_op_ptr == "!=" ||
+                *m_op_ptr == ">=" ||
+                *m_op_ptr == "<=" ||
+                *m_op_ptr == ">" ||
+                *m_op_ptr == "<")) {
+      // Integer inputs, boolean output
+      inputs = "int";
+      output = "bool";
+    } else {
+      // integer inputs and output
+      inputs = "int";
+      output = "int";
+    }
+
+    Type* inputs_type = g_sym_table.getType(inputs);
+
+    if (inputs_type != left_type_ptr) {
+      m_left_ptr->error("Type mismatch: left operand of operator '" + *m_op_ptr +
+                        "' expects input type '" + inputs + "', actual was " + left_type_ptr->toString() + "'");
+    }
+
+    if (inputs_type != right_type_ptr) {
+      m_right_ptr->error("Type mismatch: right operand of operator '" + *m_op_ptr +
+                         "' expects input type '" + inputs + "', actual was '" + right_type_ptr->toString() + "'");
+    }
+  }
+
+  // All is well
+  Type* output_type = g_sym_table.getType(output);
+  return output_type;
+}
+
+
+void InfixOperatorExprAST::print(ostream& out) const
+{
+  out << "[InfixExpr: " << *m_left_ptr
+      << *m_op_ptr << *m_right_ptr << "]";
+}