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