sparc: Pull the "Uknown" StaticInst class out of the ISA description.

The only thing the Unknown format does is return an instance of this
class, so there's no reason to have it in the ISA description.

Change-Id: I3f8187b1450a8622a974c030c0cb552b26f6b5f0
Reviewed-on: https://gem5-review.googlesource.com/5463
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/arch/sparc/insts/unknown.hh b/src/arch/sparc/insts/unknown.hh
new file mode 100644
index 000000000..b5826e40f
--- /dev/null
+++ b/src/arch/sparc/insts/unknown.hh
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2006 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
+ *          Steve Reinhardt
+ */
+
+#ifndef __ARCH_SPARC_INSTS_UNKNOWN_HH__
+#define __ARCH_SPARC_INSTS_UNKNOWN_HH__
+
+#include "arch/sparc/insts/static_inst.hh"
+
+namespace SparcISA
+{
+
+/**
+ * Class for Unknown/Illegal instructions
+ */
+class Unknown : public SparcStaticInst
+{
+  public:
+
+    // Constructor
+    Unknown(ExtMachInst _machInst) :
+            SparcStaticInst("unknown", _machInst, No_OpClass)
+    {}
+
+    Fault
+    execute(ExecContext *, Trace::InstRecord *) const override
+    {
+        return std::make_shared<IllegalInstruction>();
+    }
+
+    std::string
+    generateDisassembly(Addr pc, const SymbolTable *symtab) const override
+    {
+        return "Unknown instruction";
+    }
+
+};
+
+}
+
+#endif // __ARCH_SPARC_INSTS_UNKNOWN_HH__