arch/alpha/arguments.hh

   1 /*
   2  * Copyright (c) 2003-2005 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 "arch/alpha/vtophys.hh"
  35 #include "base/refcnt.hh"
  36 #include "sim/host.hh"
  37
  38 class ExecContext;
  39
  40 class 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         CopyData(xc, buf, getArg(), sizeof(T));
 133         return buf;
 134     }
 135
 136     operator char *() {
 137         char *buf = data->alloc(2048);
 138         CopyString(xc, buf, getArg(), 2048);
 139         return buf;
 140     }
 141 };
 142
 143 #endif // __ARGUMENTS_HH__