func_unit.hh revision 10807 
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
50class OpDesc : public SimObject
51{
52  public:
53    OpClass opClass;
54    Cycles opLat;
55    bool pipelined;
56
57    OpDesc(const OpDescParams *p)
58        : SimObject(p), opClass(p->opClass), opLat(p->opLat),
59          pipelined(p->pipelined) {};
60};
61
62class FUDesc : public SimObject
63{
64  public:
65    std::vector<OpDesc *> opDescList;
66    unsigned         number;
67
68    FUDesc(const FUDescParams *p)
69        : SimObject(p), opDescList(p->opList), number(p->count) {};
70};
71
72typedef std::vector<OpDesc *>::const_iterator OPDDiterator;
73typedef std::vector<FUDesc *>::const_iterator FUDDiterator;
74
75
76
77
78////////////////////////////////////////////////////////////////////////////
79//
80//  The actual FU object
81//
82//
83//
84class FuncUnit
85{
86  private:
87    unsigned opLatencies[Num_OpClasses];
88    bool pipelined[Num_OpClasses];
89    std::bitset<Num_OpClasses> capabilityList;
90
91  public:
92    FuncUnit();
93    FuncUnit(const FuncUnit &fu);
94
95    std::string name;
96
97    void addCapability(OpClass cap, unsigned oplat, bool pipelined);
98
99    bool provides(OpClass capability);
100    std::bitset<Num_OpClasses> capabilities();
101
102    unsigned &opLatency(OpClass capability);
103    bool isPipelined(OpClass capability);
104};
105
106#endif // __FU_POOL_HH__
107