2 #include "CodeEmitterGen.h"
5 void CodeEmitterGen::createEmitter(std::ostream &o) {
6 std::vector<Record*> Insts;
8 const std::map<std::string, Record*> &Defs = Records.getDefs();
9 Record *Inst = Records.getClass("Instruction");
10 assert(Inst && "Couldn't find Instruction class!");
12 for (std::map<std::string, Record*>::const_iterator I = Defs.begin(),
13 E = Defs.end(); I != E; ++I)
14 if (I->second->isSubClassOf(Inst))
15 Insts.push_back(I->second);
17 std::string Namespace = "V9::";
18 std::string ClassName = "SparcV9CodeEmitter::";
20 //const std::string &Namespace = Inst->getValue("Namespace")->getName();
21 o << "unsigned " << ClassName
22 << "getBinaryCodeForInstr(MachineInstr &MI) {\n"
23 << " unsigned Value = 0;\n"
24 << " switch (MI.getOpcode()) {\n";
25 for (std::vector<Record*>::iterator I = Insts.begin(), E = Insts.end();
29 o << " case " << Namespace << R->getName() << ": {\n";
31 const RecordVal *InstVal = R->getValue("Inst");
32 Init *InitVal = InstVal->getValue();
34 assert(dynamic_cast<BitsInit*>(InitVal) &&
35 "Can only handle undefined bits<> types!");
36 BitsInit *BI = (BitsInit*)InitVal;
39 const std::vector<RecordVal> &Vals = R->getValues();
41 // Start by filling in fixed values...
42 for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
43 if (BitInit *B = dynamic_cast<BitInit*>(BI->getBit(i)))
44 Value |= B->getValue() << i;
46 o << " Value = " << Value << "U;\n";
47 o << " // " << *InstVal << "\n";
49 // Loop over all of the fields in the instruction adding in any
50 // contributions to this value (due to bit references).
52 unsigned Offset = 31, opNum=0;
53 std::map<const std::string,unsigned> OpOrder;
54 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
55 if (Vals[i].getName() != "Inst" &&
56 !Vals[i].getValue()->isComplete() &&
57 Vals[i].getName() != "annul" &&
58 Vals[i].getName() != "cc" &&
59 Vals[i].getName() != "predict")
61 o << " // " << opNum << ": " << Vals[i].getName() << "\n";
62 OpOrder[Vals[i].getName()] = opNum++;
66 for (int f = Vals.size()-1; f >= 0; --f) {
67 if (Vals[f].getPrefix()) {
68 BitsInit *FieldInitializer = (BitsInit*)Vals[f].getValue();
70 // Scan through the field looking for bit initializers of the current
72 for (int i = FieldInitializer->getNumBits()-1; i >= 0; --i) {
74 if (BitInit *BI=dynamic_cast<BitInit*>(FieldInitializer->getBit(i))){
76 } else if (UnsetInit *UI =
77 dynamic_cast<UnsetInit*>(FieldInitializer->getBit(i))) {
79 } else if (VarBitInit *VBI =
80 dynamic_cast<VarBitInit*>(FieldInitializer->getBit(i))) {
81 TypedInit *TI = VBI->getVariable();
82 if (VarInit *VI = dynamic_cast<VarInit*>(TI)) {
83 o << " Value |= getValueBit(MI.getOperand("
84 << OpOrder[VI->getName()]
85 << "), " << VBI->getBitNum()
86 << ")" << " << " << Offset << ";\n";
88 } else if (FieldInit *FI = dynamic_cast<FieldInit*>(TI)) {
89 // FIXME: implement this!
90 o << "FIELD INIT not implemented yet!\n";
92 o << "something else\n";
103 << " return Value;\n"