unknown.isa revision 12236:126ac9da6050
1// -*- mode:c++ -*- 2 3// Copyright (c) 2015 RISC-V Foundation 4// Copyright (c) 2016 The University of Virginia 5// All rights reserved. 6// 7// Redistribution and use in source and binary forms, with or without 8// modification, are permitted provided that the following conditions are 9// met: redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer; 11// redistributions in binary form must reproduce the above copyright 12// notice, this list of conditions and the following disclaimer in the 13// documentation and/or other materials provided with the distribution; 14// neither the name of the copyright holders nor the names of its 15// contributors may be used to endorse or promote products derived from 16// this software without specific prior written permission. 17// 18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29// 30// Authors: Maxwell Walter 31// Alec Roelke 32 33//////////////////////////////////////////////////////////////////// 34// 35// Unknown instructions 36// 37 38output header {{ 39 /** 40 * Static instruction class for unknown (illegal) instructions. 41 * These cause simulator termination if they are executed in a 42 * non-speculative mode. This is a leaf class. 43 */ 44 class Unknown : public RiscvStaticInst 45 { 46 public: 47 /// Constructor 48 Unknown(MachInst _machInst) 49 : RiscvStaticInst("unknown", _machInst, No_OpClass) 50 { 51 flags[IsNonSpeculative] = true; 52 } 53 54 Fault execute(ExecContext *, Trace::InstRecord *) const; 55 56 std::string 57 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 58 }; 59}}; 60 61output decoder {{ 62 std::string 63 Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const 64 { 65 return csprintf("unknown opcode 0x%02x", OPCODE); 66 } 67}}; 68 69output exec {{ 70 Fault 71 Unknown::execute(ExecContext *xc, Trace::InstRecord *traceData) const 72 { 73 Fault fault = std::make_shared<UnknownInstFault>(); 74 return fault; 75 } 76}}; 77 78def format Unknown() {{ 79 decode_block = 'return new Unknown(machInst);\n' 80}}; 81