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Diffstat (limited to 'support/tools/TableGen/InstrInfoEmitter.cpp')
| -rw-r--r-- | support/tools/TableGen/InstrInfoEmitter.cpp | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/support/tools/TableGen/InstrInfoEmitter.cpp b/support/tools/TableGen/InstrInfoEmitter.cpp deleted file mode 100644 index c794cd0441..0000000000 --- a/support/tools/TableGen/InstrInfoEmitter.cpp +++ /dev/null @@ -1,160 +0,0 @@ -//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===// -// -// This tablegen backend is responsible for emitting a description of the target -// instruction set for the code generator. -// -//===----------------------------------------------------------------------===// - -#include "InstrInfoEmitter.h" -#include "CodeGenWrappers.h" -#include "Record.h" - -// runEnums - Print out enum values for all of the instructions. -void InstrInfoEmitter::runEnums(std::ostream &OS) { - std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction"); - - if (Insts.size() == 0) - throw std::string("No 'Instruction' subclasses defined!"); - - std::string Namespace = Insts[0]->getValueAsString("Namespace"); - - EmitSourceFileHeader("Target Instruction Enum Values", OS); - - if (!Namespace.empty()) - OS << "namespace " << Namespace << " {\n"; - OS << " enum {\n"; - - CodeGenTarget Target; - - // We must emit the PHI opcode first... - Record *InstrInfo = Target.getInstructionSet(); - Record *PHI = InstrInfo->getValueAsDef("PHIInst"); - - OS << " " << PHI->getName() << ", \t// 0 (fixed for all targets)\n"; - - // Print out the rest of the instructions now... - for (unsigned i = 0, e = Insts.size(); i != e; ++i) - if (Insts[i] != PHI) - OS << " " << Insts[i]->getName() << ", \t// " << i+1 << "\n"; - - OS << " };\n"; - if (!Namespace.empty()) - OS << "}\n"; -} - -void InstrInfoEmitter::printDefList(ListInit *LI, const std::string &Name, - std::ostream &OS) const { - OS << "static const unsigned " << Name << "[] = { "; - for (unsigned j = 0, e = LI->getSize(); j != e; ++j) - if (DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(j))) - OS << getQualifiedName(DI->getDef()) << ", "; - else - throw "Illegal value in '" + Name + "' list!"; - OS << "0 };\n"; -} - - -// run - Emit the main instruction description records for the target... -void InstrInfoEmitter::run(std::ostream &OS) { - EmitSourceFileHeader("Target Instruction Descriptors", OS); - CodeGenTarget Target; - const std::string &TargetName = Target.getName(); - Record *InstrInfo = Target.getInstructionSet(); - Record *PHI = InstrInfo->getValueAsDef("PHIInst"); - - std::vector<Record*> Instructions = - Records.getAllDerivedDefinitions("Instruction"); - - // Emit all of the instruction's implicit uses and defs... - for (unsigned i = 0, e = Instructions.size(); i != e; ++i) { - Record *Inst = Instructions[i]; - ListInit *LI = Inst->getValueAsListInit("Uses"); - if (LI->getSize()) printDefList(LI, Inst->getName()+"ImpUses", OS); - LI = Inst->getValueAsListInit("Defs"); - if (LI->getSize()) printDefList(LI, Inst->getName()+"ImpDefs", OS); - } - - OS << "\nstatic const TargetInstrDescriptor " << TargetName - << "Insts[] = {\n"; - emitRecord(PHI, 0, InstrInfo, OS); - - for (unsigned i = 0, e = Instructions.size(); i != e; ++i) - if (Instructions[i] != PHI) - emitRecord(Instructions[i], i+1, InstrInfo, OS); - OS << "};\n"; -} - -void InstrInfoEmitter::emitRecord(Record *R, unsigned Num, Record *InstrInfo, - std::ostream &OS) { - OS << " { \"" << R->getValueAsString("Name") - << "\",\t-1, -1, 0, false, 0, 0, 0, 0"; - - // Emit all of the target indepedent flags... - if (R->getValueAsBit("isReturn")) OS << "|M_RET_FLAG"; - if (R->getValueAsBit("isBranch")) OS << "|M_BRANCH_FLAG"; - if (R->getValueAsBit("isCall" )) OS << "|M_CALL_FLAG"; - if (R->getValueAsBit("isTwoAddress")) OS << "|M_2_ADDR_FLAG"; - if (R->getValueAsBit("isTerminator")) OS << "|M_TERMINATOR_FLAG"; - OS << ", 0"; - - // Emit all of the target-specific flags... - ListInit *LI = InstrInfo->getValueAsListInit("TSFlagsFields"); - ListInit *Shift = InstrInfo->getValueAsListInit("TSFlagsShifts"); - if (LI->getSize() != Shift->getSize()) - throw "Lengths of " + InstrInfo->getName() + - ":(TargetInfoFields, TargetInfoPositions) must be equal!"; - - for (unsigned i = 0, e = LI->getSize(); i != e; ++i) - emitShiftedValue(R, dynamic_cast<StringInit*>(LI->getElement(i)), - dynamic_cast<IntInit*>(Shift->getElement(i)), OS); - - OS << ", "; - - // Emit the implicit uses and defs lists... - LI = R->getValueAsListInit("Uses"); - if (!LI->getSize()) - OS << "0, "; - else - OS << R->getName() << "ImpUses, "; - - LI = R->getValueAsListInit("Defs"); - if (!LI->getSize()) - OS << "0 "; - else - OS << R->getName() << "ImpDefs "; - - OS << " }, // Inst #" << Num << " = " << R->getName() << "\n"; -} - -void InstrInfoEmitter::emitShiftedValue(Record *R, StringInit *Val, - IntInit *ShiftInt, std::ostream &OS) { - if (Val == 0 || ShiftInt == 0) - throw std::string("Illegal value or shift amount in TargetInfo*!"); - RecordVal *RV = R->getValue(Val->getValue()); - int Shift = ShiftInt->getValue(); - - if (RV == 0 || RV->getValue() == 0) - throw R->getName() + " doesn't have a field named '" + Val->getValue()+"'!"; - - Init *Value = RV->getValue(); - if (BitInit *BI = dynamic_cast<BitInit*>(Value)) { - if (BI->getValue()) OS << "|(1<<" << Shift << ")"; - return; - } else if (BitsInit *BI = dynamic_cast<BitsInit*>(Value)) { - // Convert the Bits to an integer to print... - Init *I = BI->convertInitializerTo(new IntRecTy()); - if (I) - if (IntInit *II = dynamic_cast<IntInit*>(I)) { - if (II->getValue()) - OS << "|(" << II->getValue() << "<<" << Shift << ")"; - return; - } - - } else if (IntInit *II = dynamic_cast<IntInit*>(Value)) { - if (II->getValue()) OS << "|(" << II->getValue() << "<<" << Shift << ")"; - return; - } - - std::cerr << "Unhandled initializer: " << *Val << "\n"; - throw "In record '" + R->getName() + "' for TSFlag emission."; -} |