xref: /gem5/src/cpu/o3/dyn_inst_impl.hh

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 * Authors: Kevin Lim
 */

#ifndef __CPU_O3_DYN_INST_IMPL_HH__
#define __CPU_O3_DYN_INST_IMPL_HH__

#include "base/cp_annotate.hh"
#include "cpu/o3/dyn_inst.hh"
#include "sim/full_system.hh"
#include "debug/O3PipeView.hh"

template <class Impl>
BaseO3DynInst<Impl>::BaseO3DynInst(const StaticInstPtr &staticInst,
                                   const StaticInstPtr &macroop,
                                   TheISA::PCState pc, TheISA::PCState predPC,
                                   InstSeqNum seq_num, O3CPU *cpu)
    : BaseDynInst<Impl>(staticInst, macroop, pc, predPC, seq_num, cpu)
{
    initVars();
}

template <class Impl>
BaseO3DynInst<Impl>::BaseO3DynInst(const StaticInstPtr &_staticInst,
                                   const StaticInstPtr &_macroop)
    : BaseDynInst<Impl>(_staticInst, _macroop)
{
    initVars();
}

template <class Impl>BaseO3DynInst<Impl>::~BaseO3DynInst()
{
#if TRACING_ON
    if (DTRACE(O3PipeView)) {
        Tick fetch = this->fetchTick;
        // fetchTick can be -1 if the instruction fetched outside the trace window.
        if (fetch != -1) {
            Tick val;
            // Print info needed by the pipeline activity viewer.
            DPRINTFR(O3PipeView, "O3PipeView:fetch:%llu:0x%08llx:%d:%llu:%s\n",
                     fetch,
                     this->instAddr(),
                     this->microPC(),
                     this->seqNum,
                     this->staticInst->disassemble(this->instAddr()));

            val = (this->decodeTick == -1) ? 0 : fetch + this->decodeTick;
            DPRINTFR(O3PipeView, "O3PipeView:decode:%llu\n", val);
            val = (this->renameTick == -1) ? 0 : fetch + this->renameTick;
            DPRINTFR(O3PipeView, "O3PipeView:rename:%llu\n", val);
            val = (this->dispatchTick == -1) ? 0 : fetch + this->dispatchTick;
            DPRINTFR(O3PipeView, "O3PipeView:dispatch:%llu\n", val);
            val = (this->issueTick == -1) ? 0 : fetch + this->issueTick;
            DPRINTFR(O3PipeView, "O3PipeView:issue:%llu\n", val);
            val = (this->completeTick == -1) ? 0 : fetch + this->completeTick;
            DPRINTFR(O3PipeView, "O3PipeView:complete:%llu\n", val);
            val = (this->commitTick == -1) ? 0 : fetch + this->commitTick;

            Tick valS = (this->storeTick == -1) ? 0 : fetch + this->storeTick;
            DPRINTFR(O3PipeView, "O3PipeView:retire:%llu:store:%llu\n", val, valS);
        }
    }
#endif
};


template <class Impl>
void
BaseO3DynInst<Impl>::initVars()
{
    this->_readySrcRegIdx.reset();

    _numDestMiscRegs = 0;

#if TRACING_ON
    // Value -1 indicates that particular phase
    // hasn't happened (yet).
    fetchTick = -1;
    decodeTick = -1;
    renameTick = -1;
    dispatchTick = -1;
    issueTick = -1;
    completeTick = -1;
    commitTick = -1;
    storeTick = -1;
#endif
}

template <class Impl>
Fault
BaseO3DynInst<Impl>::execute()
{
    // @todo: Pretty convoluted way to avoid squashing from happening
    // when using the TC during an instruction's execution
    // (specifically for instructions that have side-effects that use
    // the TC).  Fix this.
    bool no_squash_from_TC = this->thread->noSquashFromTC;
    this->thread->noSquashFromTC = true;

    this->fault = this->staticInst->execute(this, this->traceData);

    this->thread->noSquashFromTC = no_squash_from_TC;

    return this->fault;
}

template <class Impl>
Fault
BaseO3DynInst<Impl>::initiateAcc()
{
    // @todo: Pretty convoluted way to avoid squashing from happening
    // when using the TC during an instruction's execution
    // (specifically for instructions that have side-effects that use
    // the TC).  Fix this.
    bool no_squash_from_TC = this->thread->noSquashFromTC;
    this->thread->noSquashFromTC = true;

    this->fault = this->staticInst->initiateAcc(this, this->traceData);

    this->thread->noSquashFromTC = no_squash_from_TC;

    return this->fault;
}

template <class Impl>
Fault
BaseO3DynInst<Impl>::completeAcc(PacketPtr pkt)
{
    // @todo: Pretty convoluted way to avoid squashing from happening
    // when using the TC during an instruction's execution
    // (specifically for instructions that have side-effects that use
    // the TC).  Fix this.
    bool no_squash_from_TC = this->thread->noSquashFromTC;
    this->thread->noSquashFromTC = true;

    if (this->cpu->checker) {
        if (this->isStoreConditional()) {
            this->reqToVerify->setExtraData(pkt->req->getExtraData());
        }
    }

    this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);

    this->thread->noSquashFromTC = no_squash_from_TC;

    return this->fault;
}

template <class Impl>
void
BaseO3DynInst<Impl>::trap(const Fault &fault)
{
    this->cpu->trap(fault, this->threadNumber, this->staticInst);
}

template <class Impl>
void
BaseO3DynInst<Impl>::syscall(int64_t callnum, Fault *fault)
{
    if (FullSystem)
        panic("Syscall emulation isn't available in FS mode.\n");

    // HACK: check CPU's nextPC before and after syscall. If it
    // changes, update this instruction's nextPC because the syscall
    // must have changed the nextPC.
    TheISA::PCState curPC = this->cpu->pcState(this->threadNumber);
    this->cpu->syscall(callnum, this->threadNumber, fault);
    TheISA::PCState newPC = this->cpu->pcState(this->threadNumber);
    if (!(curPC == newPC)) {
        this->pcState(newPC);
    }
}

#endif//__CPU_O3_DYN_INST_IMPL_HH__