4333549575
Currently, each op class has a parameter issueLat that denotes the cycles after which another op of the same class can be issued. As of now, this latency can either be one cycle (fully pipelined) or same as execution latency of the op (not at all pipelined). The fact that issueLat is a parameter of type Cycles makes one believe that it can be set to any value. To avoid the confusion, the parameter is being renamed as 'pipelined' with type boolean. If set to true, the op would execute in a fully pipelined fashion. Otherwise, it would execute in an unpipelined fashion.
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*
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* Copyright (c) 2002-2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Steve Raasch
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*/
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#ifndef __CPU_FUNC_UNIT_HH__
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#define __CPU_FUNC_UNIT_HH__
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#include <bitset>
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#include <string>
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#include <vector>
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#include "cpu/op_class.hh"
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#include "params/FUDesc.hh"
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#include "params/OpDesc.hh"
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#include "sim/sim_object.hh"
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////////////////////////////////////////////////////////////////////////////
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//
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// Structures used ONLY during the initialization phase...
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//
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//
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//
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class OpDesc : public SimObject
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{
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public:
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OpClass opClass;
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Cycles opLat;
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bool pipelined;
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OpDesc(const OpDescParams *p)
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: SimObject(p), opClass(p->opClass), opLat(p->opLat),
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pipelined(p->pipelined) {};
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};
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class FUDesc : public SimObject
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{
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public:
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std::vector<OpDesc *> opDescList;
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unsigned number;
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FUDesc(const FUDescParams *p)
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: SimObject(p), opDescList(p->opList), number(p->count) {};
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};
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typedef std::vector<OpDesc *>::const_iterator OPDDiterator;
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typedef std::vector<FUDesc *>::const_iterator FUDDiterator;
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////////////////////////////////////////////////////////////////////////////
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//
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// The actual FU object
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//
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//
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//
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class FuncUnit
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{
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private:
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unsigned opLatencies[Num_OpClasses];
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bool pipelined[Num_OpClasses];
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std::bitset<Num_OpClasses> capabilityList;
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public:
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FuncUnit();
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FuncUnit(const FuncUnit &fu);
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std::string name;
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void addCapability(OpClass cap, unsigned oplat, bool pipelined);
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bool provides(OpClass capability);
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std::bitset<Num_OpClasses> capabilities();
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unsigned &opLatency(OpClass capability);
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bool isPipelined(OpClass capability);
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};
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#endif // __FU_POOL_HH__
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