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