func_unit.hh revision 8229:78bf55f23338 
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
50struct OpDesc : public SimObject
51{
52    OpClass opClass;
53    unsigned    opLat;
54    unsigned    issueLat;
55
56    OpDesc(const OpDescParams *p)
57        : SimObject(p), opClass(p->opClass), opLat(p->opLat),
58          issueLat(p->issueLat) {};
59};
60
61struct FUDesc : public SimObject
62{
63    std::vector<OpDesc *> opDescList;
64    unsigned         number;
65
66    FUDesc(const FUDescParams *p)
67        : SimObject(p), opDescList(p->opList), number(p->count) {};
68};
69
70typedef std::vector<OpDesc *>::const_iterator OPDDiterator;
71typedef std::vector<FUDesc *>::const_iterator FUDDiterator;
72
73
74
75
76////////////////////////////////////////////////////////////////////////////
77//
78//  The actual FU object
79//
80//
81//
82class FuncUnit
83{
84  private:
85    unsigned opLatencies[Num_OpClasses];
86    unsigned issueLatencies[Num_OpClasses];
87    std::bitset<Num_OpClasses> capabilityList;
88
89  public:
90    FuncUnit();
91    FuncUnit(const FuncUnit &fu);
92
93    std::string name;
94
95    void addCapability(OpClass cap, unsigned oplat, unsigned issuelat);
96
97    bool provides(OpClass capability);
98    std::bitset<Num_OpClasses> capabilities();
99
100    unsigned &opLatency(OpClass capability);
101    unsigned issueLatency(OpClass capability);
102};
103
104#endif // __FU_POOL_HH__
105