src/cpu/func_unit.cc

   1 /*
   2  * Copyright (c) 2002-2006 The Regents of The University of Michigan
   3  * All rights reserved.
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   5  * Redistribution and use in source and binary forms, with or without
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  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
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  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "cpu/func_unit.hh"
  30
  31 #include <sstream>
  32
  33 #include "base/logging.hh"
  34
  35 ////////////////////////////////////////////////////////////////////////////
  36 //
  37 //  The funciton unit
  38 //
  39 FuncUnit::FuncUnit()
  40 {
  41     opLatencies.fill(0);
  42     pipelined.fill(false);
  43     capabilityList.reset();
  44 }
  45
  46
  47 //  Copy constructor
  48 FuncUnit::FuncUnit(const FuncUnit &fu)
  49 {
  50
  51     for (int i = 0; i < Num_OpClasses; ++i) {
  52         opLatencies[i] = fu.opLatencies[i];
  53         pipelined[i] = fu.pipelined[i];
  54     }
  55
  56     capabilityList = fu.capabilityList;
  57 }
  58
  59
  60 void
  61 FuncUnit::addCapability(OpClass cap, unsigned oplat, bool pipeline)
  62 {
  63     if (oplat == 0)
  64         panic("FuncUnit:  you don't really want a zero-cycle latency do you?");
  65
  66     capabilityList.set(cap);
  67
  68     opLatencies[cap] = oplat;
  69     pipelined[cap] = pipeline;
  70 }
  71
  72 bool
  73 FuncUnit::provides(OpClass capability)
  74 {
  75     return capabilityList[capability];
  76 }
  77
  78 std::bitset<Num_OpClasses>
  79 FuncUnit::capabilities()
  80 {
  81     return capabilityList;
  82 }
  83
  84 unsigned &
  85 FuncUnit::opLatency(OpClass cap)
  86 {
  87     return opLatencies[cap];
  88 }
  89
  90 bool
  91 FuncUnit::isPipelined(OpClass capability)
  92 {
  93     return pipelined[capability];
  94 }