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1// -*- mode:c++ -*-
2
3////////////////////////////////////////////////////////////////////
4//
5// Base class for MIPS instructions, and some support functions
6//
7
8//Outputs to decoder.hh
9output header {{
10
11 using namespace MipsISA;
12
13
14 /**
15 * Base class for all MIPS static instructions.
16 */
17 class MipsStaticInst : public StaticInst
18 {
19 protected:
20
21 // Constructor
22 MipsStaticInst(const char *mnem, MachInst _machInst, OpClass __opClass)
23 : StaticInst(mnem, _machInst, __opClass)
24 {
25 }
26
27 /// Print a register name for disassembly given the unique
28 /// dependence tag number (FP or int).
29 void printReg(std::ostream &os, int reg) const;
30
31 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
32 };
33
34}};
35
36//Ouputs to decoder.cc
37output decoder {{
38
39 void MipsStaticInst::printReg(std::ostream &os, int reg) const
40 {
41 if (reg < FP_Base_DepTag) {
42 ccprintf(os, "r%d", reg);
43 }
44 else {
45 ccprintf(os, "f%d", reg - FP_Base_DepTag);
46 }
47 }
48
49 std::string MipsStaticInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
50 {
51 std::stringstream ss;
52
53 ccprintf(ss, "%-10s ", mnemonic);
54
55 if(_numDestRegs > 0){
56 printReg(ss, _destRegIdx[0]);
57 }
58
59 if(_numSrcRegs > 0) {
60 ss << ", ";
61 printReg(ss, _srcRegIdx[0]);
62 }
63
64 if(_numSrcRegs > 1) {
65 ss << ", ";
66 printReg(ss, _srcRegIdx[1]);
67 }
68
69
70 if(mnemonic == "sll" || mnemonic == "sra"){
71 ccprintf(ss,", %d",SA);
72 }
73
74 return ss.str();
75 }
76
77}};
78