gem5  v20.1.0.0
nop.hh
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2006-2007 The Regents of The University of Michigan
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met: redistributions of source code must retain the above copyright
8  * notice, this list of conditions and the following disclaimer;
9  * redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution;
12  * neither the name of the copyright holders nor the names of its
13  * contributors may be used to endorse or promote products derived from
14  * this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #ifndef __ARCH_SPARC_INSTS_NOP_HH__
30 #define __ARCH_SPARC_INSTS_NOP_HH__
31 
33 
34 namespace SparcISA
35 {
36 
38 //
39 // Nop instruction
40 //
41 
45 class Nop : public SparcStaticInst
46 {
47  public:
48  // Constructor
49  Nop(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
50  SparcStaticInst(mnem, _machInst, __opClass)
51  {
52  flags[IsNop] = true;
53  }
54 
55  Fault
56  execute(ExecContext *xc, Trace::InstRecord *traceData) const override
57  {
58  return NoFault;
59  }
60 
61  std::string
63  Addr pc, const Loader::SymbolTable *symtab) const override
64  {
65  std::stringstream response;
66  printMnemonic(response, mnemonic);
67  return response.str();
68  }
69 };
70 
71 }
72 
73 #endif // __ARCH_SPARC_INSTS_NOP_HH__
StaticInst::flags
std::bitset< Num_Flags > flags
Flag values for this instruction.
Definition: static_inst.hh:99
Loader::SymbolTable
Definition: symtab.hh:59
Trace::InstRecord
Definition: insttracer.hh:55
SparcISA::Nop::Nop
Nop(const char *mnem, ExtMachInst _machInst, OpClass __opClass)
Definition: nop.hh:49
SparcISA::Nop::execute
Fault execute(ExecContext *xc, Trace::InstRecord *traceData) const override
Definition: nop.hh:56
SparcISA
Definition: asi.cc:31
Fault
std::shared_ptr< FaultBase > Fault
Definition: types.hh:240
MipsISA::pc
Bitfield< 4 > pc
Definition: pra_constants.hh:240
ExecContext
The ExecContext is an abstract base class the provides the interface used by the ISA to manipulate th...
Definition: exec_context.hh:70
SparcISA::Nop
Nop class.
Definition: nop.hh:45
StaticInst::mnemonic
const char * mnemonic
Base mnemonic (e.g., "add").
Definition: static_inst.hh:258
StaticInst::ExtMachInst
TheISA::ExtMachInst ExtMachInst
Binary extended machine instruction type.
Definition: static_inst.hh:89
SparcISA::Nop::generateDisassembly
std::string generateDisassembly(Addr pc, const Loader::SymbolTable *symtab) const override
Internal function to generate disassembly string.
Definition: nop.hh:62
NoFault
constexpr decltype(nullptr) NoFault
Definition: types.hh:245
Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:142
SparcISA::SparcStaticInst
Base class for all SPARC static instructions.
Definition: static_inst.hh:87
SparcISA::SparcStaticInst::printMnemonic
static void printMnemonic(std::ostream &os, const char *mnemonic)
Definition: static_inst.cc:56
static_inst.hh

Generated on Wed Sep 30 2020 14:02:07 for gem5 by doxygen 1.8.17