src/arch/alpha/registers.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  */
  30
  31 #ifndef __ARCH_ALPHA_REGISTERS_HH__
  32 #define __ARCH_ALPHA_REGISTERS_HH__
  33
  34 #include "arch/alpha/ipr.hh"
  35 #include "arch/alpha/max_inst_regs.hh"
  36 #include "base/types.hh"
  37
  38 namespace AlphaISA {
  39
  40 using AlphaISAInst::MaxInstSrcRegs;
  41 using AlphaISAInst::MaxInstDestRegs;
  42
  43 typedef uint8_t RegIndex;
  44 typedef uint64_t IntReg;
  45
  46 // floating point register file entry type
  47 typedef double FloatReg;
  48 typedef uint64_t FloatRegBits;
  49
  50 // control register file contents
  51 typedef uint64_t MiscReg;
  52
  53 union AnyReg
  54 {
  55     IntReg  intreg;
  56     FloatReg   fpreg;
  57     MiscReg ctrlreg;
  58 };
  59
  60 enum MiscRegIndex
  61 {
  62     MISCREG_FPCR = NumInternalProcRegs,
  63     MISCREG_UNIQ,
  64     MISCREG_LOCKFLAG,
  65     MISCREG_LOCKADDR,
  66     MISCREG_INTR
  67 };
  68
  69 // semantically meaningful register indices
  70 const RegIndex ZeroReg = 31;     // architecturally meaningful
  71 // the rest of these depend on the ABI
  72 const RegIndex StackPointerReg = 30;
  73 const RegIndex GlobalPointerReg = 29;
  74 const RegIndex ProcedureValueReg = 27;
  75 const RegIndex ReturnAddressReg = 26;
  76 const RegIndex ReturnValueReg = 0;
  77 const RegIndex FramePointerReg = 15;
  78
  79 const RegIndex SyscallNumReg = 0;
  80 const RegIndex FirstArgumentReg = 16;
  81 const RegIndex SyscallPseudoReturnReg = 20;
  82 const RegIndex SyscallSuccessReg = 19;
  83
  84 const int NumIntArchRegs = 32;
  85 const int NumPALShadowRegs = 8;
  86 const int NumFloatArchRegs = 32;
  87 // @todo: Figure out what this number really should be.
  88 const int NumMiscArchRegs = 77;
  89
  90 const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs;
  91 const int NumFloatRegs = NumFloatArchRegs;
  92 const int NumMiscRegs = NumMiscArchRegs;
  93
  94 const int TotalNumRegs =
  95     NumIntRegs + NumFloatRegs + NumMiscRegs + NumInternalProcRegs;
  96
  97 const int TotalDataRegs = NumIntRegs + NumFloatRegs;
  98
  99 // These enumerate all the registers for dependence tracking.
 100 enum DependenceTags {
 101     // 0..31 are the integer regs 0..31
 102     // 32..63 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
 103     FP_Base_DepTag = 40,
 104     Ctrl_Base_DepTag = 72
 105 };
 106
 107 } // namespace AlphaISA
 108
 109 #endif // __ARCH_ALPHA_REGFILE_HH__