unimp.isa revision 12234:78ece221f9f5
1// -*- mode:c++ -*- 2 3// Copyright (c) 2003-2005 The Regents of The University of Michigan 4// All rights reserved. 5// 6// Redistribution and use in source and binary forms, with or without 7// modification, are permitted provided that the following conditions are 8// met: redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer; 10// redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution; 13// neither the name of the copyright holders nor the names of its 14// contributors may be used to endorse or promote products derived from 15// this software without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28// 29// Authors: Steve Reinhardt 30 31//////////////////////////////////////////////////////////////////// 32// 33// Unimplemented instructions 34// 35 36output header {{ 37 /** 38 * Static instruction class for unimplemented instructions that 39 * cause simulator termination. Note that these are recognized 40 * (legal) instructions that the simulator does not support; the 41 * 'Unknown' class is used for unrecognized/illegal instructions. 42 * This is a leaf class. 43 */ 44 class FailUnimplemented : public SparcStaticInst 45 { 46 public: 47 /// Constructor 48 FailUnimplemented(const char *_mnemonic, ExtMachInst _machInst) 49 : SparcStaticInst(_mnemonic, _machInst, No_OpClass) 50 { 51 // don't call execute() (which panics) if we're on a 52 // speculative path 53 flags[IsNonSpeculative] = true; 54 } 55 56 %(BasicExecDeclare)s 57 58 std::string 59 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 60 }; 61 62 /** 63 * Base class for unimplemented instructions that cause a warning 64 * to be printed (but do not terminate simulation). This 65 * implementation is a little screwy in that it will print a 66 * warning for each instance of a particular unimplemented machine 67 * instruction, not just for each unimplemented opcode. Should 68 * probably make the 'warned' flag a static member of the derived 69 * class. 70 */ 71 class WarnUnimplemented : public SparcStaticInst 72 { 73 private: 74 /// Have we warned on this instruction yet? 75 mutable bool warned; 76 77 public: 78 /// Constructor 79 WarnUnimplemented(const char *_mnemonic, ExtMachInst _machInst) 80 : SparcStaticInst(_mnemonic, _machInst, No_OpClass), warned(false) 81 { 82 // don't call execute() (which panics) if we're on a 83 // speculative path 84 flags[IsNonSpeculative] = true; 85 } 86 87 %(BasicExecDeclare)s 88 89 std::string 90 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 91 }; 92}}; 93 94output decoder {{ 95 std::string 96 FailUnimplemented::generateDisassembly(Addr pc, 97 const SymbolTable *symtab) const 98 { 99 return csprintf("%-10s (unimplemented)", mnemonic); 100 } 101 102 std::string 103 WarnUnimplemented::generateDisassembly(Addr pc, 104 const SymbolTable *symtab) const 105 { 106 return csprintf("%-10s (unimplemented)", mnemonic); 107 } 108}}; 109 110output exec {{ 111 Fault 112 FailUnimplemented::execute(ExecContext *xc, 113 Trace::InstRecord *traceData) const 114 { 115 panic("attempt to execute unimplemented instruction '%s' " 116 "(inst 0x%08x)", mnemonic, machInst); 117 return NoFault; 118 } 119 120 Fault 121 WarnUnimplemented::execute(ExecContext *xc, 122 Trace::InstRecord *traceData) const 123 { 124 if (!warned) { 125 warn("instruction '%s' unimplemented\n", mnemonic); 126 warned = true; 127 } 128 129 return NoFault; 130 } 131}}; 132 133 134def format FailUnimpl() {{ 135 iop = InstObjParams(name, 'FailUnimplemented') 136 decode_block = BasicDecodeWithMnemonic.subst(iop) 137}}; 138 139def format WarnUnimpl() {{ 140 iop = InstObjParams(name, 'WarnUnimplemented') 141 decode_block = BasicDecodeWithMnemonic.subst(iop) 142}}; 143 144