base.isa revision 2706:d88c27f75121 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2006 The Regents of The University of Michigan
4// All rights reserved.
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15// this software without specific prior written permission.
16//
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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    /**
43     * Base class for all MIPS static instructions.
44     */
45    class MipsStaticInst : public StaticInst
46    {
47      protected:
48
49        // Constructor
50        MipsStaticInst(const char *mnem, MachInst _machInst, OpClass __opClass)
51            : StaticInst(mnem, _machInst, __opClass)
52        {
53        }
54
55        /// Print a register name for disassembly given the unique
56        /// dependence tag number (FP or int).
57        void printReg(std::ostream &os, int reg) const;
58
59        std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
60    };
61
62}};
63
64//Ouputs to decoder.cc
65output decoder {{
66
67    void MipsStaticInst::printReg(std::ostream &os, int reg) const
68    {
69        if (reg < FP_Base_DepTag) {
70            ccprintf(os, "r%d", reg);
71        }
72        else {
73            ccprintf(os, "f%d", reg - FP_Base_DepTag);
74        }
75    }
76
77    std::string MipsStaticInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
78    {
79        std::stringstream ss;
80
81        ccprintf(ss, "%-10s ", mnemonic);
82
83        if(_numDestRegs > 0){
84            printReg(ss, _destRegIdx[0]);
85        }
86
87        if(_numSrcRegs > 0) {
88            ss << ", ";
89            printReg(ss, _srcRegIdx[0]);
90        }
91
92        if(_numSrcRegs > 1) {
93            ss << ", ";
94            printReg(ss, _srcRegIdx[1]);
95        }
96
97
98        if(mnemonic == "sll" || mnemonic == "sra"){
99            ccprintf(ss,", %d",SA);
100        }
101
102        return ss.str();
103    }
104
105}};
106
107