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+// -*- mode:c++ -*-
+
+// Copyright (c) 2015 RISC-V Foundation
+// Copyright (c) 2016 The University of Virginia
+// 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.
+//
+// Authors: Maxwell Walter
+//          Alec Roelke
+
+// Declarations for execute() methods.
+def template BasicExecDeclare {{
+    Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const;
+}};
+
+// Basic instruction class declaration template.
+def template BasicDeclare {{
+    //
+    // Static instruction class for "%(mnemonic)s".
+    //
+    class %(class_name)s : public %(base_class)s
+    {
+      public:
+        /// Constructor.
+        %(class_name)s(MachInst machInst);
+        %(BasicExecDeclare)s
+        using %(base_class)s::generateDisassembly;
+    };
+}};
+
+// Basic instruction class constructor template.
+def template BasicConstructor {{
+    %(class_name)s::%(class_name)s(MachInst machInst)
+        : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s)
+    {
+        %(constructor)s;
+    }
+}};
+
+
+// Basic instruction class execute method template.
+def template BasicExecute {{
+    Fault
+    %(class_name)s::execute(CPU_EXEC_CONTEXT *xc,
+        Trace::InstRecord *traceData) const
+    {
+        Fault fault = NoFault;
+
+        %(op_decl)s;
+        %(op_rd)s;
+        if (fault == NoFault) {
+            %(code)s;
+            if (fault == NoFault) {
+                %(op_wb)s;
+            }
+        }
+        return fault;
+    }
+}};
+
+// Basic decode template.
+def template BasicDecode {{
+    return new %(class_name)s(machInst);
+}};
+
+// Basic decode template, passing mnemonic in as string arg to constructor.
+def template BasicDecodeWithMnemonic {{
+    return new %(class_name)s("%(mnemonic)s", machInst);
+}};
+
+// The most basic instruction format...
+def format BasicOp(code, *flags) {{
+    iop = InstObjParams(name, Name, 'RiscvStaticInst', code, flags)
+    header_output = BasicDeclare.subst(iop)
+    decoder_output = BasicConstructor.subst(iop)
+    decode_block = BasicDecode.subst(iop)
+    exec_output = BasicExecute.subst(iop)
+}};