src/base/bigint.hh

   1 /*
   2  * Copyright (c) 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: Ali Saidi
  29  */
  30
  31 #include "base/misc.hh"
  32
  33 #include <iostream>
  34
  35 #ifndef __BASE_BIGINT_HH__
  36 #define __BASE_BIGINT_HH__
  37 // Create a couple of large int types for atomic reads
  38 struct m5_twin64_t {
  39     uint64_t a;
  40     uint64_t b;
  41     m5_twin64_t()
  42     {}
  43     m5_twin64_t(const uint64_t x)
  44     {
  45         a = x;
  46         b = x;
  47     }
  48     inline m5_twin64_t& operator=(const uint64_t x)
  49     {
  50         a = x;
  51         b = x;
  52         return *this;
  53     }
  54
  55     operator uint64_t()
  56     {
  57         panic("Tried to cram a twin64_t into an integer!\n");
  58         return a;
  59     }
  60 };
  61
  62 struct m5_twin32_t {
  63     uint32_t a;
  64     uint32_t b;
  65     m5_twin32_t()
  66     {}
  67     m5_twin32_t(const uint32_t x)
  68     {
  69         a = x;
  70         b = x;
  71     }
  72     inline m5_twin32_t& operator=(const uint32_t x)
  73     {
  74         a = x;
  75         b = x;
  76         return *this;
  77     }
  78
  79     operator uint32_t()
  80     {
  81         panic("Tried to cram a twin32_t into an integer!\n");
  82         return a;
  83     }
  84 };
  85
  86
  87 // This is for twin loads (two 64 bit values), not 1 128 bit value (as far as
  88 // endian conversion is concerned!
  89 typedef m5_twin64_t Twin64_t;
  90 typedef m5_twin32_t Twin32_t;
  91
  92 // Output operator overloads
  93 std::ostream & operator << (std::ostream & os, const Twin64_t & t);
  94 std::ostream & operator << (std::ostream & os, const Twin32_t & t);
  95
  96 #endif // __BASE_BIGINT_HH__
  97