func_unit.hh revision 2736 
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 "sim/sim_object.hh"
40
41////////////////////////////////////////////////////////////////////////////
42//
43//  Structures used ONLY during the initialization phase...
44//
45//
46//
47
48struct OpDesc : public SimObject
49{
50    OpClass opClass;
51    unsigned    opLat;
52    unsigned    issueLat;
53
54    OpDesc(std::string name, OpClass c, unsigned o, unsigned i)
55        : SimObject(name), opClass(c), opLat(o), issueLat(i) {};
56};
57
58struct FUDesc : public SimObject
59{
60    std::vector<OpDesc *> opDescList;
61    unsigned         number;
62
63    FUDesc(std::string name, std::vector<OpDesc *> l, unsigned n)
64        : SimObject(name), opDescList(l), number(n) {};
65};
66
67typedef std::vector<OpDesc *>::iterator OPDDiterator;
68typedef std::vector<FUDesc *>::iterator FUDDiterator;
69
70
71
72
73////////////////////////////////////////////////////////////////////////////
74//
75//  The actual FU object
76//
77//
78//
79class FuncUnit
80{
81  private:
82    unsigned opLatencies[Num_OpClasses];
83    unsigned issueLatencies[Num_OpClasses];
84    std::bitset<Num_OpClasses> capabilityList;
85
86  public:
87    FuncUnit();
88    FuncUnit(const FuncUnit &fu);
89
90    std::string name;
91
92    void addCapability(OpClass cap, unsigned oplat, unsigned issuelat);
93
94    bool provides(OpClass capability);
95    std::bitset<Num_OpClasses> capabilities();
96
97    unsigned &opLatency(OpClass capability);
98    unsigned issueLatency(OpClass capability);
99};
100
101#endif // __FU_POOL_HH__
102