arch/alpha/arguments.hh

   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 "base/refcnt.hh"
  35 #include "kern/tru64/kernel.hh"
  36 #include "sim/host.hh"
  37 #include "targetarch/vtophys.hh"
  38
  39 class ExecContext;
  40
  41 class AlphaArguments
  42 {
  43   protected:
  44     ExecContext *xc;
  45     int number;
  46     uint64_t getArg(bool fp = false);
  47
  48   protected:
  49     class Data : public RefCounted
  50     {
  51       public:
  52         Data(){}
  53         ~Data();
  54
  55       private:
  56         std::list<char *> data;
  57
  58       public:
  59         char *alloc(size_t size);
  60     };
  61
  62     RefCountingPtr<Data> data;
  63
  64   public:
  65     AlphaArguments(ExecContext *ctx, int n = 0)
  66         : xc(ctx), number(n), data(NULL)
  67         { assert(number >= 0); data = new Data;}
  68     AlphaArguments(const AlphaArguments &args)
  69         : xc(args.xc), number(args.number), data(args.data) {}
  70     ~AlphaArguments() {}
  71
  72     ExecContext *getExecContext() const { return xc; }
  73
  74     const AlphaArguments &operator=(const AlphaArguments &args) {
  75         xc = args.xc;
  76         number = args.number;
  77         data = args.data;
  78         return *this;
  79     }
  80
  81     AlphaArguments &operator++() {
  82         ++number;
  83         assert(number >= 0);
  84         return *this;
  85     }
  86
  87     AlphaArguments operator++(int) {
  88         AlphaArguments args = *this;
  89         ++number;
  90         assert(number >= 0);
  91         return args;
  92     }
  93
  94     AlphaArguments &operator--() {
  95         --number;
  96         assert(number >= 0);
  97         return *this;
  98     }
  99
 100     AlphaArguments operator--(int) {
 101         AlphaArguments args = *this;
 102         --number;
 103         assert(number >= 0);
 104         return args;
 105     }
 106
 107     const AlphaArguments &operator+=(int index) {
 108         number += index;
 109         assert(number >= 0);
 110         return *this;
 111     }
 112
 113     const AlphaArguments &operator-=(int index) {
 114         number -= index;
 115         assert(number >= 0);
 116         return *this;
 117     }
 118
 119     AlphaArguments operator[](int index) {
 120         return AlphaArguments(xc, index);
 121     }
 122
 123     template <class T>
 124     operator T() {
 125         assert(sizeof(T) <= sizeof(uint64_t));
 126         T data = static_cast<T>(getArg());
 127         return data;
 128     }
 129
 130     template <class T>
 131     operator T *() {
 132         T *buf = (T *)data->alloc(sizeof(T));
 133         CopyData(xc, buf, getArg(), sizeof(T));
 134         return buf;
 135     }
 136
 137     operator char *() {
 138         char *buf = data->alloc(2048);
 139         CopyString(xc, buf, getArg(), 2048);
 140         return buf;
 141     }
 142 };
 143
 144 #endif // __ARGUMENTS_HH__