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/*
* Copyright (c) 2011, 2019 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2004-2006 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: Kevin Lim
*/
#ifndef __CPU_BASE_DYN_INST_IMPL_HH__
#define __CPU_BASE_DYN_INST_IMPL_HH__
#include <iostream>
#include <set>
#include <sstream>
#include <string>
#include "base/cprintf.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/base_dyn_inst.hh"
#include "cpu/exetrace.hh"
#include "debug/DynInst.hh"
#include "debug/IQ.hh"
#include "mem/request.hh"
#include "sim/faults.hh"
template <class Impl>
BaseDynInst<Impl>::BaseDynInst(const StaticInstPtr &_staticInst,
const StaticInstPtr &_macroop,
TheISA::PCState _pc, TheISA::PCState _predPC,
InstSeqNum seq_num, ImplCPU *cpu)
: staticInst(_staticInst), cpu(cpu),
thread(nullptr),
traceData(nullptr),
macroop(_macroop),
memData(nullptr),
savedReq(nullptr),
reqToVerify(nullptr)
{
seqNum = seq_num;
pc = _pc;
predPC = _predPC;
initVars();
}
template <class Impl>
BaseDynInst<Impl>::BaseDynInst(const StaticInstPtr &_staticInst,
const StaticInstPtr &_macroop)
: staticInst(_staticInst), traceData(NULL), macroop(_macroop)
{
seqNum = 0;
initVars();
}
template <class Impl>
void
BaseDynInst<Impl>::initVars()
{
memData = NULL;
effAddr = 0;
physEffAddr = 0;
readyRegs = 0;
memReqFlags = 0;
status.reset();
instFlags.reset();
instFlags[RecordResult] = true;
instFlags[Predicate] = true;
instFlags[MemAccPredicate] = true;
lqIdx = -1;
sqIdx = -1;
// Eventually make this a parameter.
threadNumber = 0;
// Also make this a parameter, or perhaps get it from xc or cpu.
asid = 0;
// Initialize the fault to be NoFault.
fault = NoFault;
#ifndef NDEBUG
++cpu->instcount;
if (cpu->instcount > 1500) {
#ifdef DEBUG
cpu->dumpInsts();
dumpSNList();
#endif
assert(cpu->instcount <= 1500);
}
DPRINTF(DynInst,
"DynInst: [sn:%lli] Instruction created. Instcount for %s = %i\n",
seqNum, cpu->name(), cpu->instcount);
#endif
#ifdef DEBUG
cpu->snList.insert(seqNum);
#endif
}
template <class Impl>
BaseDynInst<Impl>::~BaseDynInst()
{
if (memData) {
delete [] memData;
}
if (traceData) {
delete traceData;
}
fault = NoFault;
#ifndef NDEBUG
--cpu->instcount;
DPRINTF(DynInst,
"DynInst: [sn:%lli] Instruction destroyed. Instcount for %s = %i\n",
seqNum, cpu->name(), cpu->instcount);
#endif
#ifdef DEBUG
cpu->snList.erase(seqNum);
#endif
}
#ifdef DEBUG
template <class Impl>
void
BaseDynInst<Impl>::dumpSNList()
{
std::set<InstSeqNum>::iterator sn_it = cpu->snList.begin();
int count = 0;
while (sn_it != cpu->snList.end()) {
cprintf("%i: [sn:%lli] not destroyed\n", count, (*sn_it));
count++;
sn_it++;
}
}
#endif
template <class Impl>
void
BaseDynInst<Impl>::dump()
{
cprintf("T%d : %#08d `", threadNumber, pc.instAddr());
std::cout << staticInst->disassemble(pc.instAddr());
cprintf("'\n");
}
template <class Impl>
void
BaseDynInst<Impl>::dump(std::string &outstring)
{
std::ostringstream s;
s << "T" << threadNumber << " : 0x" << pc.instAddr() << " "
<< staticInst->disassemble(pc.instAddr());
outstring = s.str();
}
template <class Impl>
void
BaseDynInst<Impl>::markSrcRegReady()
{
DPRINTF(IQ, "[sn:%lli] has %d ready out of %d sources. RTI %d)\n",
seqNum, readyRegs+1, numSrcRegs(), readyToIssue());
if (++readyRegs == numSrcRegs()) {
setCanIssue();
}
}
template <class Impl>
void
BaseDynInst<Impl>::markSrcRegReady(RegIndex src_idx)
{
_readySrcRegIdx[src_idx] = true;
markSrcRegReady();
}
template <class Impl>
bool
BaseDynInst<Impl>::eaSrcsReady() const
{
// For now I am assuming that src registers 1..n-1 are the ones that the
// EA calc depends on. (i.e. src reg 0 is the source of the data to be
// stored)
for (int i = 1; i < numSrcRegs(); ++i) {
if (!_readySrcRegIdx[i])
return false;
}
return true;
}
template <class Impl>
void
BaseDynInst<Impl>::setSquashed()
{
status.set(Squashed);
if (!isPinnedRegsRenamed() || isPinnedRegsSquashDone())
return;
// This inst has been renamed already so it may go through rename
// again (e.g. if the squash is due to memory access order violation).
// Reset the write counters for all pinned destination register to ensure
// that they are in a consistent state for a possible re-rename. This also
// ensures that dest regs will be pinned to the same phys register if
// re-rename happens.
for (int idx = 0; idx < numDestRegs(); idx++) {
PhysRegIdPtr phys_dest_reg = renamedDestRegIdx(idx);
if (phys_dest_reg->isPinned()) {
phys_dest_reg->incrNumPinnedWrites();
if (isPinnedRegsWritten())
phys_dest_reg->incrNumPinnedWritesToComplete();
}
}
setPinnedRegsSquashDone();
}
#endif//__CPU_BASE_DYN_INST_IMPL_HH__