diff --git a/utils/TableGen/CodeEmitterGen.cpp b/utils/TableGen/CodeEmitterGen.cpp index ec702c2a5d9..ac085120bf3 100644 --- a/utils/TableGen/CodeEmitterGen.cpp +++ b/utils/TableGen/CodeEmitterGen.cpp @@ -42,7 +42,7 @@ void CodeEmitterGen::reverseBits(std::vector &Insts) { unsigned middle = (numBits + 1) / 2; NewBI->setBit(middle, BI->getBit(middle)); } - + // Update the bits in reversed order so that emitInstrOpBits will get the // correct endianness. R->getValue("Inst")->setValue(NewBI); @@ -56,26 +56,26 @@ int CodeEmitterGen::getVariableBit(const std::string &VarName, BitsInit *BI, int bit) { if (VarBitInit *VBI = dynamic_cast(BI->getBit(bit))) { TypedInit *TI = VBI->getVariable(); - + if (VarInit *VI = dynamic_cast(TI)) { if (VI->getName() == VarName) return VBI->getBitNum(); } } - + return -1; -} +} void CodeEmitterGen::run(raw_ostream &o) { CodeGenTarget Target; std::vector Insts = Records.getAllDerivedDefinitions("Instruction"); - + // For little-endian instruction bit encodings, reverse the bit order if (Target.isLittleEndianEncoding()) reverseBits(Insts); EmitSourceFileHeader("Machine Code Emitter", o); std::string Namespace = Insts[0]->getValueAsString("Namespace") + "::"; - + const std::vector &NumberedInstructions = Target.getInstructionsByEnumValue(); @@ -91,12 +91,12 @@ void CodeEmitterGen::run(raw_ostream &o) { IN != EN; ++IN) { const CodeGenInstruction *CGI = *IN; Record *R = CGI->TheDef; - + if (R->getValueAsString("Namespace") == "TargetOpcode") { o << " 0U,\n"; continue; } - + BitsInit *BI = R->getValueAsBitsInit("Inst"); // Start by filling in fixed values... @@ -109,10 +109,10 @@ void CodeEmitterGen::run(raw_ostream &o) { o << " " << Value << "U," << '\t' << "// " << R->getName() << "\n"; } o << " 0U\n };\n"; - + // Map to accumulate all the cases. std::map > CaseMap; - + // Construct all cases statement for each opcode for (std::vector::iterator IC = Insts.begin(), EC = Insts.end(); IC != EC; ++IC) { @@ -125,7 +125,7 @@ void CodeEmitterGen::run(raw_ostream &o) { BitsInit *BI = R->getValueAsBitsInit("Inst"); const std::vector &Vals = R->getValues(); CodeGenInstruction &CGI = Target.getInstruction(R); - + // Loop over all of the fields in the instruction, determining which are the // operands to the instruction. unsigned op = 0; @@ -135,17 +135,17 @@ void CodeEmitterGen::run(raw_ostream &o) { // instead of doing it bit-by-bit, saving a lot in runtime cost. const std::string &VarName = Vals[i].getName(); bool gotOp = false; - + for (int bit = BI->getNumBits()-1; bit >= 0; ) { int varBit = getVariableBit(VarName, BI, bit); - + if (varBit == -1) { --bit; } else { int beginInstBit = bit; int beginVarBit = varBit; int N = 1; - + for (--bit; bit >= 0;) { varBit = getVariableBit(VarName, BI, bit); if (varBit == -1 || varBit != (beginVarBit - N)) break; @@ -158,18 +158,18 @@ void CodeEmitterGen::run(raw_ostream &o) { /// emitter, skip it. while (CGI.isFlatOperandNotEmitted(op)) ++op; - + Case += " // op: " + VarName + "\n" + " op = getMachineOpValue(MI, MI.getOperand(" + utostr(op++) + "));\n"; gotOp = true; } - + unsigned opMask = ~0U >> (32-N); int opShift = beginVarBit - N + 1; opMask <<= opShift; opShift = beginInstBit - beginVarBit; - + if (opShift > 0) { Case += " Value |= (op & " + utostr(opMask) + "U) << " + itostr(opShift) + ";\n";