src/arch/mips/isa/base.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2006 The Regents of The University of Michigan
   4 // All rights reserved.
   5 //
   6 // Redistribution and use in source and binary forms, with or without
   7 // modification, are permitted provided that the following conditions are
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   9 // notice, this list of conditions and the following disclaimer;
  10 // redistributions in binary form must reproduce the above copyright
  11 // notice, this list of conditions and the following disclaimer in the
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  13 // neither the name of the copyright holders nor the names of its
  14 // contributors may be used to endorse or promote products derived from
  15 // this software without specific prior written permission.
  16 //
  17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29 // Authors: Korey Sewell
  30
  31 ////////////////////////////////////////////////////////////////////
  32 //
  33 // Base class for MIPS instructions, and some support functions
  34 //
  35
  36 //Outputs to decoder.hh
  37 output header {{
  38
  39     using namespace MipsISA;
  40
  41     /**
  42      * Base class for all MIPS static instructions.
  43      */
  44     class MipsStaticInst : public StaticInst
  45     {
  46       protected:
  47
  48         // Constructor
  49         MipsStaticInst(const char *mnem, MachInst _machInst, OpClass __opClass)
  50             : StaticInst(mnem, _machInst, __opClass)
  51         {
  52         }
  53
  54         /// Print a register name for disassembly given the unique
  55         /// dependence tag number (FP or int).
  56         void printReg(std::ostream &os, int reg) const;
  57
  58         std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
  59     };
  60
  61 }};
  62
  63 //Ouputs to decoder.cc
  64 output decoder {{
  65
  66     void MipsStaticInst::printReg(std::ostream &os, int reg) const
  67     {
  68         if (reg < FP_Base_DepTag) {
  69             ccprintf(os, "r%d", reg);
  70         }
  71         else {
  72             ccprintf(os, "f%d", reg - FP_Base_DepTag);
  73         }
  74     }
  75
  76     std::string MipsStaticInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  77     {
  78         std::stringstream ss;
  79
  80         ccprintf(ss, "%-10s ", mnemonic);
  81
  82         if(_numDestRegs > 0){
  83             printReg(ss, _destRegIdx[0]);
  84         }
  85
  86         if(_numSrcRegs > 0) {
  87             ss << ", ";
  88             printReg(ss, _srcRegIdx[0]);
  89         }
  90
  91         if(_numSrcRegs > 1) {
  92             ss << ", ";
  93             printReg(ss, _srcRegIdx[1]);
  94         }
  95
  96
  97         if(mnemonic == "sll" || mnemonic == "sra"){
  98             ccprintf(ss,", %d",SA);
  99         }
 100
 101         return ss.str();
 102     }
 103
 104 }};
 105