func_unit.hh

Go to the documentation of this file.

/*
 * Copyright (c) 2013-2014 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.
 *
 * 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.
 */
 
#ifndef __CPU_MINOR_FUNC_UNIT_HH__
#define __CPU_MINOR_FUNC_UNIT_HH__
 
#include <cstdint>
#include <ostream>
#include <string>
#include <vector>
 
#include "base/types.hh"
#include "cpu/func_unit.hh"
#include "cpu/minor/buffers.hh"
#include "cpu/minor/dyn_inst.hh"
#include "cpu/timing_expr.hh"
#include "params/MinorFU.hh"
#include "params/MinorFUPool.hh"
#include "params/MinorOpClass.hh"
#include "params/MinorOpClassSet.hh"
#include "sim/clocked_object.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
class MinorOpClass : public SimObject
{
  public:
    OpClass opClass;
 
  public:
    MinorOpClass(const MinorOpClassParams &params) :
        SimObject(params),
        opClass(params.opClass)
    { }
};
 
class MinorOpClassSet : public SimObject
{
  public:
    std::vector<MinorOpClass *> opClasses;
 
    std::vector<bool> capabilityList;
 
  public:
    MinorOpClassSet(const MinorOpClassSetParams &params);
 
  public:
    bool provides(OpClass op_class) { return capabilityList[op_class]; }
};
 
class MinorFUTiming: public SimObject
{
  public:
    uint64_t mask;
    uint64_t match;
 
    std::string description;
 
    bool suppress;
 
    Cycles extraCommitLat;
    TimingExpr *extraCommitLatExpr;
 
    Cycles extraAssumedLat;
 
    std::vector<Cycles> srcRegsRelativeLats;
 
    MinorOpClassSet *opClasses;
 
  public:
    MinorFUTiming(const MinorFUTimingParams &params);
 
  public:
    bool provides(OpClass op_class) { return opClasses->provides(op_class); }
};
 
class MinorFU : public SimObject
{
  public:
    MinorOpClassSet *opClasses;
 
    Cycles opLat;
 
    Cycles issueLat;
 
    std::vector<unsigned int> cantForwardFromFUIndices;
 
    std::vector<MinorFUTiming *> timings;
 
  public:
    MinorFU(const MinorFUParams &params) :
        SimObject(params),
        opClasses(params.opClasses),
        opLat(params.opLat),
        issueLat(params.issueLat),
        cantForwardFromFUIndices(params.cantForwardFromFUIndices),
        timings(params.timings)
    { }
};
 
class MinorFUPool : public SimObject
{
  public:
    std::vector<MinorFU *> funcUnits;
 
  public:
    MinorFUPool(const MinorFUPoolParams &params) :
        SimObject(params),
        funcUnits(params.funcUnits)
    { }
};
 
namespace minor
{
 
class QueuedInst
{
  public:
    MinorDynInstPtr inst;
 
  public:
    QueuedInst(MinorDynInstPtr inst_ = MinorDynInst::bubble()) :
        inst(inst_)
    { }
 
  public:
    void reportData(std::ostream &os) const;
    bool isBubble() const { return inst->isBubble(); }
 
    static QueuedInst bubble()
    { return QueuedInst(MinorDynInst::bubble()); }
};
 
typedef SelfStallingPipeline<QueuedInst,
    ReportTraitsAdaptor<QueuedInst> > FUPipelineBase;
 
class FUPipeline : public FUPipelineBase, public FuncUnit
{
  public:
    const MinorFU &description;
 
    ClockedObject &timeSource;
 
    std::bitset<Num_OpClasses> capabilityList;
 
    std::vector<bool> cantForwardFromFUIndices;
 
  public:
    Cycles nextInsertCycle;
 
  public:
    FUPipeline(const std::string &name, const MinorFU &description_,
        ClockedObject &timeSource_);
 
  public:
    Cycles cyclesBeforeInsert();
 
    bool canInsert() const;
 
    MinorFUTiming *findTiming(const StaticInstPtr &inst);
 
    void advance();
};
 
} // namespace minor
} // namespace gem5
 
#endif /* __CPU_MINOR_FUNC_UNIT_HH__ */