base.isa revision 2754:e3d023bc752c 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2006 The Regents of The University of Michigan
4// All rights reserved.
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10// redistributions in binary form must reproduce the above copyright
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15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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
37output 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
64output 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
106