Stub decoder. This is probably even farther from finished than it looks...

--HG--
extra : convert_revision : a39a158fec4560f6eb7a6987592c473677c0b1ba

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diff --git a/src/arch/x86/isa/formats/basic.isa b/src/arch/x86/isa/formats/basic.isa
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+++ b/src/arch/x86/isa/formats/basic.isa
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+// Copyright (c) 2007 The Regents of The University of Michigan
+// 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: Gabe Black
+
+// Copyright (c) 2007 The Hewlett-Packard Development Company
+// All rights reserved.
+//
+// Redistribution and use of this software in source and binary forms,
+// with or without modification, are permitted provided that the
+// following conditions are met:
+//
+// The software must be used only for Non-Commercial Use which means any
+// use which is NOT directed to receiving any direct monetary
+// compensation for, or commercial advantage from such use.  Illustrative
+// examples of non-commercial use are academic research, personal study,
+// teaching, education and corporate research & development.
+// Illustrative examples of commercial use are distributing products for
+// commercial advantage and providing services using the software for
+// commercial advantage.
+//
+// If you wish to use this software or functionality therein that may be
+// covered by patents for commercial use, please contact:
+//     Director of Intellectual Property Licensing
+//     Office of Strategy and Technology
+//     Hewlett-Packard Company
+//     1501 Page Mill Road
+//     Palo Alto, California  94304
+//
+// 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.  No right of
+// sublicense is granted herewith.  Derivatives of the software and
+// output created using the software may be prepared, but only for
+// Non-Commercial Uses.  Derivatives of the software may be shared with
+// others provided: (i) the others agree to abide by the list of
+// conditions herein which includes the Non-Commercial Use restrictions;
+// and (ii) such Derivatives of the software include the above copyright
+// notice to acknowledge the contribution from this software where
+// applicable, this list of conditions and the disclaimer below.
+//
+// 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: Gabe Black
+
+// Declarations for execute() methods.
+def template BasicExecDeclare {{
+        Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const;
+}};
+
+// Definitions of execute methods that panic.
+def template BasicExecPanic {{
+        Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const
+        {
+            panic("Execute method called when it shouldn't!");
+            M5_DUMMY_RETURN
+        }
+}};
+
+// 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(ExtMachInst machInst);
+            %(BasicExecDeclare)s
+        };
+}};
+
+// Basic instruction class constructor template.
+def template BasicConstructor {{
+        inline %(class_name)s::%(class_name)s(ExtMachInst 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)s *xc,
+                Trace::InstRecord *traceData) const
+        {
+            Fault fault = NoFault;
+
+            %(fp_enable_check)s;
+            %(op_decl)s;
+            %(op_rd)s;
+            %(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);
+}};