src/arch/x86/floatregfile.hh

   1 /*
   2  * Copyright (c) 2003-2007 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  */
  30
  31 /*
  32  * Copyright (c) 2007 The Hewlett-Packard Development Company
  33  * All rights reserved.
  34  *
  35  * Redistribution and use of this software in source and binary forms,
  36  * with or without modification, are permitted provided that the
  37  * following conditions are met:
  38  *
  39  * The software must be used only for Non-Commercial Use which means any
  40  * use which is NOT directed to receiving any direct monetary
  41  * compensation for, or commercial advantage from such use.  Illustrative
  42  * examples of non-commercial use are academic research, personal study,
  43  * teaching, education and corporate research & development.
  44  * Illustrative examples of commercial use are distributing products for
  45  * commercial advantage and providing services using the software for
  46  * commercial advantage.
  47  *
  48  * If you wish to use this software or functionality therein that may be
  49  * covered by patents for commercial use, please contact:
  50  *     Director of Intellectual Property Licensing
  51  *     Office of Strategy and Technology
  52  *     Hewlett-Packard Company
  53  *     1501 Page Mill Road
  54  *     Palo Alto, California  94304
  55  *
  56  * Redistributions of source code must retain the above copyright notice,
  57  * this list of conditions and the following disclaimer.  Redistributions
  58  * in binary form must reproduce the above copyright notice, this list of
  59  * conditions and the following disclaimer in the documentation and/or
  60  * other materials provided with the distribution.  Neither the name of
  61  * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
  62  * contributors may be used to endorse or promote products derived from
  63  * this software without specific prior written permission.  No right of
  64  * sublicense is granted herewith.  Derivatives of the software and
  65  * output created using the software may be prepared, but only for
  66  * Non-Commercial Uses.  Derivatives of the software may be shared with
  67  * others provided: (i) the others agree to abide by the list of
  68  * conditions herein which includes the Non-Commercial Use restrictions;
  69  * and (ii) such Derivatives of the software include the above copyright
  70  * notice to acknowledge the contribution from this software where
  71  * applicable, this list of conditions and the disclaimer below.
  72  *
  73  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  74  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  75  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  76  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  77  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  78  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  79  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  80  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  81  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  82  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  83  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  84  *
  85  * Authors: Gabe Black
  86  */
  87
  88 #ifndef __ARCH_X86_FLOATREGFILE_HH__
  89 #define __ARCH_X86_FLOATREGFILE_HH__
  90
  91 #include <string>
  92
  93 #include "arch/x86/faults.hh"
  94 #include "arch/x86/types.hh"
  95 #include "arch/x86/x86_traits.hh"
  96
  97 class Checkpoint;
  98
  99 namespace X86ISA
 100 {
 101     //Each 128 bit xmm register is broken into two effective 64 bit registers.
 102     const int NumFloatRegs =
 103         NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs;
 104     const int NumFloatArchRegs = NumFloatRegs + 8;
 105
 106     class FloatRegFile
 107     {
 108       public:
 109         static const int SingleWidth = 32;
 110         static const int DoubleWidth = 64;
 111         static const int QuadWidth = 128;
 112
 113       protected:
 114         union
 115         {
 116             uint64_t q[NumFloatRegs];
 117             double d[NumFloatRegs];
 118             float f[NumFloatRegs][2];
 119         };
 120
 121       public:
 122         void clear();
 123
 124         FloatReg readReg(int floatReg, int width);
 125
 126         FloatRegBits readRegBits(int floatReg, int width);
 127
 128         Fault setReg(int floatReg, const FloatReg &val, int width);
 129
 130         Fault setRegBits(int floatReg, const FloatRegBits &val, int width);
 131
 132         void serialize(std::ostream &os);
 133
 134         void unserialize(Checkpoint *cp, const std::string &section);
 135     };
 136 }
 137
 138 #endif //__ARCH_X86_FLOATREGFILE_HH__