src/cpu/func_unit.hh

   1 /*
   2  * Copyright (c) 2002-2006 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  * Authors: Steve Raasch
  29  */
  30
  31 #ifndef __CPU_FUNC_UNIT_HH__
  32 #define __CPU_FUNC_UNIT_HH__
  33
  34 #include <bitset>
  35 #include <string>
  36 #include <vector>
  37
  38 #include "cpu/op_class.hh"
  39 #include "params/FUDesc.hh"
  40 #include "params/OpDesc.hh"
  41 #include "sim/sim_object.hh"
  42
  43 ////////////////////////////////////////////////////////////////////////////
  44 //
  45 //  Structures used ONLY during the initialization phase...
  46 //
  47 //
  48 //
  49
  50 class OpDesc : public SimObject
  51 {
  52   public:
  53     OpClass opClass;
  54     Cycles opLat;
  55     Cycles issueLat;
  56
  57     OpDesc(const OpDescParams *p)
  58         : SimObject(p), opClass(p->opClass), opLat(p->opLat),
  59           issueLat(p->issueLat) {};
  60 };
  61
  62 class FUDesc : public SimObject
  63 {
  64   public:
  65     std::vector<OpDesc *> opDescList;
  66     unsigned         number;
  67
  68     FUDesc(const FUDescParams *p)
  69         : SimObject(p), opDescList(p->opList), number(p->count) {};
  70 };
  71
  72 typedef std::vector<OpDesc *>::const_iterator OPDDiterator;
  73 typedef std::vector<FUDesc *>::const_iterator FUDDiterator;
  74
  75
  76
  77
  78 ////////////////////////////////////////////////////////////////////////////
  79 //
  80 //  The actual FU object
  81 //
  82 //
  83 //
  84 class FuncUnit
  85 {
  86   private:
  87     unsigned opLatencies[Num_OpClasses];
  88     unsigned issueLatencies[Num_OpClasses];
  89     std::bitset<Num_OpClasses> capabilityList;
  90
  91   public:
  92     FuncUnit();
  93     FuncUnit(const FuncUnit &fu);
  94
  95     std::string name;
  96
  97     void addCapability(OpClass cap, unsigned oplat, unsigned issuelat);
  98
  99     bool provides(OpClass capability);
 100     std::bitset<Num_OpClasses> capabilities();
 101
 102     unsigned &opLatency(OpClass capability);
 103     unsigned issueLatency(OpClass capability);
 104 };
 105
 106 #endif // __FU_POOL_HH__