src/arch/sparc/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: Gabe Black
  29  *          Ali Saidi
  30  */
  31
  32 #ifndef __ARCH_SPARC_FLOATREGFILE_HH__
  33 #define __ARCH_SPARC_FLOATREGFILE_HH__
  34
  35 #include "arch/sparc/faults.hh"
  36 #include "arch/sparc/isa_traits.hh"
  37 #include "arch/sparc/types.hh"
  38
  39 #include <string>
  40
  41 namespace SparcISA
  42 {
  43     std::string getFloatRegName(RegIndex);
  44
  45     typedef float float32_t;
  46     typedef double float64_t;
  47     //FIXME long double refers to a 10 byte float, rather than a
  48     //16 byte float as required. This data type may have to be emulated.
  49     typedef double float128_t;
  50
  51     class FloatRegFile
  52     {
  53       public:
  54         static const int SingleWidth = 32;
  55         static const int DoubleWidth = 64;
  56         static const int QuadWidth = 128;
  57
  58       protected:
  59
  60         //Since the floating point registers overlap each other,
  61         //A generic storage space is used. The float to be returned is
  62         //pulled from the appropriate section of this region.
  63         char regSpace[(SingleWidth / 8) * NumFloatRegs];
  64
  65       public:
  66
  67         void clear();
  68
  69         FloatReg readReg(int floatReg, int width);
  70
  71         FloatRegBits readRegBits(int floatReg, int width);
  72
  73         Fault setReg(int floatReg, const FloatReg &val, int width);
  74
  75         Fault setRegBits(int floatReg, const FloatRegBits &val, int width);
  76
  77         void serialize(std::ostream &os);
  78
  79         void unserialize(Checkpoint *cp, const std::string &section);
  80     };
  81 }
  82
  83 #endif