unimp.isa revision 2706
12083SN/A// -*- mode:c++ -*- 22083SN/A 32706Sksewell@umich.edu 42083SN/A// Copyright (c) 2003-2005 The Regents of The University of Michigan 52083SN/A// All rights reserved. 62083SN/A// 72083SN/A// Redistribution and use in source and binary forms, with or without 82083SN/A// modification, are permitted provided that the following conditions are 92083SN/A// met: redistributions of source code must retain the above copyright 102083SN/A// notice, this list of conditions and the following disclaimer; 112083SN/A// redistributions in binary form must reproduce the above copyright 122083SN/A// notice, this list of conditions and the following disclaimer in the 132083SN/A// documentation and/or other materials provided with the distribution; 142083SN/A// neither the name of the copyright holders nor the names of its 152083SN/A// contributors may be used to endorse or promote products derived from 162083SN/A// this software without specific prior written permission. 172083SN/A// 182083SN/A// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 192083SN/A// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 202083SN/A// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 212083SN/A// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 222083SN/A// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 232083SN/A// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 242083SN/A// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 252083SN/A// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 262083SN/A// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 272083SN/A// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 282083SN/A// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 292706Sksewell@umich.edu// 302706Sksewell@umich.edu// Authors: Korey Sewell 312706Sksewell@umich.edu 322706Sksewell@umich.edu//////////////////////////////////////////////////////////////////// 332706Sksewell@umich.edu// 342706Sksewell@umich.edu// Unimplemented instructions 352706Sksewell@umich.edu// 362649Ssaidi@eecs.umich.edu 372083SN/Aoutput header {{ 382083SN/A /** 392083SN/A * Static instruction class for unimplemented instructions that 402083SN/A * cause simulator termination. Note that these are recognized 412083SN/A * (legal) instructions that the simulator does not support; the 422083SN/A * 'Unknown' class is used for unrecognized/illegal instructions. 432083SN/A * This is a leaf class. 442083SN/A */ 452125SN/A class FailUnimplemented : public MipsStaticInst 462083SN/A { 472083SN/A public: 482083SN/A /// Constructor 492083SN/A FailUnimplemented(const char *_mnemonic, MachInst _machInst) 502125SN/A : MipsStaticInst(_mnemonic, _machInst, No_OpClass) 512083SN/A { 522083SN/A // don't call execute() (which panics) if we're on a 532083SN/A // speculative path 542083SN/A flags[IsNonSpeculative] = true; 552083SN/A } 562083SN/A 572083SN/A %(BasicExecDeclare)s 582083SN/A 592083SN/A std::string 602083SN/A generateDisassembly(Addr pc, const SymbolTable *symtab) const; 612083SN/A }; 622083SN/A 632083SN/A /** 642083SN/A * Base class for unimplemented instructions that cause a warning 652083SN/A * to be printed (but do not terminate simulation). This 662083SN/A * implementation is a little screwy in that it will print a 672083SN/A * warning for each instance of a particular unimplemented machine 682083SN/A * instruction, not just for each unimplemented opcode. Should 692083SN/A * probably make the 'warned' flag a static member of the derived 702083SN/A * class. 712083SN/A */ 722125SN/A class WarnUnimplemented : public MipsStaticInst 732083SN/A { 742083SN/A private: 752083SN/A /// Have we warned on this instruction yet? 762083SN/A mutable bool warned; 772083SN/A 782083SN/A public: 792083SN/A /// Constructor 802083SN/A WarnUnimplemented(const char *_mnemonic, MachInst _machInst) 812125SN/A : MipsStaticInst(_mnemonic, _machInst, No_OpClass), warned(false) 822083SN/A { 832083SN/A // don't call execute() (which panics) if we're on a 842083SN/A // speculative path 852083SN/A flags[IsNonSpeculative] = true; 862083SN/A } 872083SN/A 882083SN/A %(BasicExecDeclare)s 892083SN/A 902083SN/A std::string 912083SN/A generateDisassembly(Addr pc, const SymbolTable *symtab) const; 922083SN/A }; 932083SN/A}}; 942083SN/A 952083SN/Aoutput decoder {{ 962083SN/A std::string 972083SN/A FailUnimplemented::generateDisassembly(Addr pc, 982083SN/A const SymbolTable *symtab) const 992083SN/A { 1002083SN/A return csprintf("%-10s (unimplemented)", mnemonic); 1012083SN/A } 1022083SN/A 1032083SN/A std::string 1042083SN/A WarnUnimplemented::generateDisassembly(Addr pc, 1052083SN/A const SymbolTable *symtab) const 1062083SN/A { 1072083SN/A return csprintf("%-10s (unimplemented)", mnemonic); 1082083SN/A } 1092083SN/A}}; 1102083SN/A 1112083SN/Aoutput exec {{ 1122083SN/A Fault 1132083SN/A FailUnimplemented::execute(%(CPU_exec_context)s *xc, 1142083SN/A Trace::InstRecord *traceData) const 1152083SN/A { 1162083SN/A panic("attempt to execute unimplemented instruction '%s' " 1172495SN/A "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, 1182495SN/A inst2string(machInst)); 1192447SN/A return new UnimplementedOpcodeFault; 1202083SN/A } 1212083SN/A 1222083SN/A Fault 1232083SN/A WarnUnimplemented::execute(%(CPU_exec_context)s *xc, 1242083SN/A Trace::InstRecord *traceData) const 1252083SN/A { 1262083SN/A if (!warned) { 1272686Sksewell@umich.edu warn("\tinstruction '%s' unimplemented\n", mnemonic); 1282083SN/A warned = true; 1292083SN/A } 1302083SN/A 1312239SN/A return NoFault; 1322083SN/A } 1332083SN/A}}; 1342083SN/A 1352083SN/A 1362083SN/Adef format FailUnimpl() {{ 1372083SN/A iop = InstObjParams(name, 'FailUnimplemented') 1382083SN/A decode_block = BasicDecodeWithMnemonic.subst(iop) 1392083SN/A}}; 1402083SN/A 1412083SN/Adef format WarnUnimpl() {{ 1422083SN/A iop = InstObjParams(name, 'WarnUnimplemented') 1432083SN/A decode_block = BasicDecodeWithMnemonic.subst(iop) 1442083SN/A}}; 1452083SN/A 146