func_unit.cc 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#include <sstream>
32
33#include "base/misc.hh"
34#include "cpu/func_unit.hh"
35
36using namespace std;
37
38
39////////////////////////////////////////////////////////////////////////////
40//
41//  The funciton unit
42//
43FuncUnit::FuncUnit()
44{
45    capabilityList.reset();
46}
47
48
49//  Copy constructor
50FuncUnit::FuncUnit(const FuncUnit &fu)
51{
52
53    for (int i = 0; i < Num_OpClasses; ++i) {
54        opLatencies[i] = fu.opLatencies[i];
55        pipelined[i] = fu.pipelined[i];
56    }
57
58    capabilityList = fu.capabilityList;
59}
60
61
62void
63FuncUnit::addCapability(OpClass cap, unsigned oplat, bool pipeline)
64{
65    if (oplat == 0)
66        panic("FuncUnit:  you don't really want a zero-cycle latency do you?");
67
68    capabilityList.set(cap);
69
70    opLatencies[cap] = oplat;
71    pipelined[cap] = pipeline;
72}
73
74bool
75FuncUnit::provides(OpClass capability)
76{
77    return capabilityList[capability];
78}
79
80bitset<Num_OpClasses>
81FuncUnit::capabilities()
82{
83    return capabilityList;
84}
85
86unsigned &
87FuncUnit::opLatency(OpClass cap)
88{
89    return opLatencies[cap];
90}
91
92bool
93FuncUnit::isPipelined(OpClass capability)
94{
95    return pipelined[capability];
96}
97
98////////////////////////////////////////////////////////////////////////////
99//
100//  The SimObjects we use to get the FU information into the simulator
101//
102////////////////////////////////////////////////////////////////////////////
103
104//
105//  We use 2 objects to specify this data in the INI file:
106//    (1) OpDesc - Describes the operation class & latencies
107//                   (multiple OpDesc objects can refer to the same
108//                   operation classes)
109//    (2) FUDesc - Describes the operations available in the unit &
110//                   the number of these units
111//
112//
113
114
115//
116//  The operation-class description object
117//
118OpDesc *
119OpDescParams::create()
120{
121    return new OpDesc(this);
122}
123
124//
125//  The FuDesc object
126//
127FUDesc *
128FUDescParams::create()
129{
130    return new FUDesc(this);
131}
132