arguments.hh revision 56 
1/*
2 * Copyright (c) 2003 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
29#ifndef __ARGUMENTS_HH__
30#define __ARGUMENTS_HH__
31
32#include <assert.h>
33
34#include "sim/host.hh"
35#include "targetarch/kernel.hh"
36#include "base/refcnt.hh"
37
38class ExecContext;
39
40class AlphaArguments
41{
42  protected:
43    ExecContext *xc;
44    int number;
45    uint64_t getArg(bool fp = false);
46
47  protected:
48    class Data : public RefCounted
49    {
50      public:
51        Data(){}
52        ~Data();
53
54      private:
55        std::list<char *> data;
56
57      public:
58        char *alloc(size_t size);
59    };
60
61    RefCountingPtr<Data> data;
62
63  public:
64    AlphaArguments(ExecContext *ctx, int n = 0)
65        : xc(ctx), number(n), data(NULL)
66        { assert(number >= 0); data = new Data;}
67    AlphaArguments(const AlphaArguments &args)
68        : xc(args.xc), number(args.number), data(args.data) {}
69    ~AlphaArguments() {}
70
71    ExecContext *getExecContext() const { return xc; }
72
73    const AlphaArguments &operator=(const AlphaArguments &args) {
74        xc = args.xc;
75        number = args.number;
76        data = args.data;
77        return *this;
78    }
79
80    AlphaArguments &operator++() {
81        ++number;
82        assert(number >= 0);
83        return *this;
84    }
85
86    AlphaArguments operator++(int) {
87        AlphaArguments args = *this;
88        ++number;
89        assert(number >= 0);
90        return args;
91    }
92
93    AlphaArguments &operator--() {
94        --number;
95        assert(number >= 0);
96        return *this;
97    }
98
99    AlphaArguments operator--(int) {
100        AlphaArguments args = *this;
101        --number;
102        assert(number >= 0);
103        return args;
104    }
105
106    const AlphaArguments &operator+=(int index) {
107        number += index;
108        assert(number >= 0);
109        return *this;
110    }
111
112    const AlphaArguments &operator-=(int index) {
113        number -= index;
114        assert(number >= 0);
115        return *this;
116    }
117
118    AlphaArguments operator[](int index) {
119        return AlphaArguments(xc, index);
120    }
121
122    template <class T>
123    operator T() {
124        assert(sizeof(T) <= sizeof(uint64_t));
125        T data = static_cast<T>(getArg());
126        return data;
127    }
128
129    template <class T>
130    operator T *() {
131        T *buf = (T *)data->alloc(sizeof(T));
132        Kernel::CopyData(xc, buf, getArg(), sizeof(T));
133        return buf;
134    }
135
136    operator char *() {
137        char *buf = data->alloc(2048);
138        Kernel::CopyString(xc, buf, getArg(), 2048);
139        return buf;
140    }
141};
142
143#endif // __ARGUMENTS_HH__
144