src/arch/alpha/floatregfile.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  * Authors: Steve Reinhardt
  29  *          Gabe Black
  30  */
  31
  32 #ifndef __ARCH_ALPHA_FLOATREGFILE_HH__
  33 #define __ARCH_ALPHA_FLOATREGFILE_HH__
  34
  35 #include <iosfwd>
  36 #include <string>
  37
  38 #include "arch/alpha/isa_traits.hh"
  39 #include "arch/alpha/types.hh"
  40
  41 class Checkpoint;
  42
  43 namespace AlphaISA {
  44
  45 const int SingleWidth = 32;
  46 const int SingleBytes = SingleWidth / 4;
  47 const int DoubleWidth = 64;
  48 const int DoubleBytes = DoubleWidth / 4;
  49 const int QuadWidth = 128;
  50 const int QuadBytes = QuadWidth / 4;
  51
  52 class FloatRegFile
  53 {
  54   public:
  55     static const int regWidth = DoubleWidth;
  56
  57     union {
  58         uint64_t q[NumFloatRegs];   // integer qword view
  59         double d[NumFloatRegs];     // double-precision floating point view
  60     };
  61
  62     void clear();
  63
  64     void serialize(std::ostream &os);
  65     void unserialize(Checkpoint *cp, const std::string &section);
  66
  67     FloatReg
  68     readReg(int floatReg)
  69     {
  70         return d[floatReg];
  71     }
  72
  73     FloatReg
  74     readReg(int floatReg, int width)
  75     {
  76         return readReg(floatReg);
  77     }
  78
  79     FloatRegBits
  80     readRegBits(int floatReg)
  81     {
  82         return q[floatReg];
  83     }
  84
  85     FloatRegBits
  86     readRegBits(int floatReg, int width)
  87     {
  88         return readRegBits(floatReg);
  89     }
  90
  91     void
  92     setReg(int floatReg, const FloatReg &val)
  93     {
  94         d[floatReg] = val;
  95     }
  96
  97     void
  98     setReg(int floatReg, const FloatReg &val, int width)
  99     {
 100         setReg(floatReg, val);
 101     }
 102
 103     void
 104     setRegBits(int floatReg, const FloatRegBits &val)
 105     {
 106         q[floatReg] = val;
 107     }
 108
 109     void
 110     setRegBits(int floatReg, const FloatRegBits &val, int width)
 111     {
 112         setRegBits(floatReg, val);
 113     }
 114
 115 };
 116
 117 } // namespace AlphaISA
 118
 119 #endif // __ARCH_ALPHA_FLOATREGFILE_HH__