#define DEBUG_TYPE "decoder-emitter"
#include "CodeGenTarget.h"
-#include "llvm/TableGen/Record.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/TableGenBackend.h"
-
-#include <vector>
#include <map>
#include <string>
+#include <vector>
using namespace llvm;
return ValueNotSet(V) ? -1 : (V == BIT_FALSE ? 0 : 1);
}
static bit_value_t bitFromBits(const BitsInit &bits, unsigned index) {
- if (BitInit *bit = dynamic_cast<BitInit*>(bits.getBit(index)))
+ if (BitInit *bit = dyn_cast<BitInit>(bits.getBit(index)))
return bit->getValue() ? BIT_TRUE : BIT_FALSE;
// The bit is uninitialized.
}
// Prints the bit value for each position.
static void dumpBits(raw_ostream &o, const BitsInit &bits) {
- unsigned index;
-
- for (index = bits.getNumBits(); index > 0; index--) {
+ for (unsigned index = bits.getNumBits(); index > 0; --index) {
switch (bitFromBits(bits, index - 1)) {
case BIT_TRUE:
o << "1";
// Starts by inheriting our parent filter chooser's filter bit values.
std::vector<bit_value_t> BitValueArray(Owner->FilterBitValues);
- unsigned bitIndex;
-
if (VariableInstructions.size()) {
// Conservatively marks each segment position as BIT_UNSET.
- for (bitIndex = 0; bitIndex < NumBits; bitIndex++)
+ for (unsigned bitIndex = 0; bitIndex < NumBits; ++bitIndex)
BitValueArray[StartBit + bitIndex] = BIT_UNSET;
// Delegates to an inferior filter chooser for further processing on this
mapIterator++) {
// Marks all the segment positions with either BIT_TRUE or BIT_FALSE.
- for (bitIndex = 0; bitIndex < NumBits; bitIndex++) {
+ for (unsigned bitIndex = 0; bitIndex < NumBits; ++bitIndex) {
if (mapIterator->first & (1ULL << bitIndex))
BitValueArray[StartBit + bitIndex] = BIT_TRUE;
else
switch (*I) {
default:
- throw "invalid decode table opcode";
+ PrintFatalError("invalid decode table opcode");
case MCD::OPC_ExtractField: {
++I;
unsigned Start = *I++;
OS.indent(Indentation) << "static bool checkDecoderPredicate(unsigned Idx, "
<< "uint64_t Bits) {\n";
Indentation += 2;
- OS.indent(Indentation) << "switch (Idx) {\n";
- OS.indent(Indentation) << "default: llvm_unreachable(\"Invalid index!\");\n";
- unsigned Index = 0;
- for (PredicateSet::const_iterator I = Predicates.begin(), E = Predicates.end();
- I != E; ++I, ++Index) {
- OS.indent(Indentation) << "case " << Index << ":\n";
- OS.indent(Indentation+2) << "return (" << *I << ");\n";
+ if (!Predicates.empty()) {
+ OS.indent(Indentation) << "switch (Idx) {\n";
+ OS.indent(Indentation) << "default: llvm_unreachable(\"Invalid index!\");\n";
+ unsigned Index = 0;
+ for (PredicateSet::const_iterator I = Predicates.begin(), E = Predicates.end();
+ I != E; ++I, ++Index) {
+ OS.indent(Indentation) << "case " << Index << ":\n";
+ OS.indent(Indentation+2) << "return (" << *I << ");\n";
+ }
+ OS.indent(Indentation) << "}\n";
+ } else {
+ // No case statement to emit
+ OS.indent(Indentation) << "llvm_unreachable(\"Invalid index!\");\n";
}
- OS.indent(Indentation) << "}\n";
Indentation -= 2;
OS.indent(Indentation) << "}\n\n";
}
for (DecoderSet::const_iterator I = Decoders.begin(), E = Decoders.end();
I != E; ++I, ++Index) {
OS.indent(Indentation) << "case " << Index << ":\n";
- OS << *I << "\n";
+ OS << *I;
OS.indent(Indentation+2) << "return S;\n";
}
OS.indent(Indentation) << "}\n";
/// filter array as a series of chars.
void FilterChooser::dumpFilterArray(raw_ostream &o,
const std::vector<bit_value_t> &filter) const {
- unsigned bitIndex;
-
- for (bitIndex = BitWidth; bitIndex > 0; bitIndex--) {
+ for (unsigned bitIndex = BitWidth; bitIndex > 0; bitIndex--) {
switch (filter[bitIndex - 1]) {
case BIT_UNFILTERED:
o << ".";
if (OpInfo.numFields() == 1) {
OperandInfo::const_iterator OI = OpInfo.begin();
- o.indent(Indentation) << " tmp = fieldFromInstruction"
+ o.indent(Indentation) << "tmp = fieldFromInstruction"
<< "(insn, " << OI->Base << ", " << OI->Width
<< ");\n";
} else {
- o.indent(Indentation) << " tmp = 0;\n";
+ o.indent(Indentation) << "tmp = 0;\n";
for (OperandInfo::const_iterator OI = OpInfo.begin(), OE = OpInfo.end();
OI != OE; ++OI) {
- o.indent(Indentation) << " tmp |= (fieldFromInstruction"
+ o.indent(Indentation) << "tmp |= (fieldFromInstruction"
<< "(insn, " << OI->Base << ", " << OI->Width
<< ") << " << OI->Offset << ");\n";
}
}
if (Decoder != "")
- o.indent(Indentation) << " " << Emitter->GuardPrefix << Decoder
+ o.indent(Indentation) << Emitter->GuardPrefix << Decoder
<< "(MI, tmp, Address, Decoder)"
<< Emitter->GuardPostfix << "\n";
else
- o.indent(Indentation) << " MI.addOperand(MCOperand::CreateImm(tmp));\n";
+ o.indent(Indentation) << "MI.addOperand(MCOperand::CreateImm(tmp));\n";
}
I = InsnOperands.begin(), E = InsnOperands.end(); I != E; ++I) {
// If a custom instruction decoder was specified, use that.
if (I->numFields() == 0 && I->Decoder.size()) {
- OS.indent(Indentation) << " " << Emitter->GuardPrefix << I->Decoder
+ OS.indent(Indentation) << Emitter->GuardPrefix << I->Decoder
<< "(MI, insn, Address, Decoder)"
<< Emitter->GuardPostfix << "\n";
break;
// FIXME: emitDecoder() function can take a buffer directly rather than
// a stream.
raw_svector_ostream S(Decoder);
- unsigned I = 0;
+ unsigned I = 4;
emitDecoder(S, I, Opc);
S.flush();
TableInfo.Table.push_back(MCD::OPC_CheckPredicate);
// Predicate index
- for (int i = 0, e = PBytes.size(); i != e; ++i)
+ for (unsigned i = 0, e = PBytes.size(); i != e; ++i)
TableInfo.Table.push_back(PBytes[i]);
// Push location for NumToSkip backpatching.
TableInfo.FixupStack.back().push_back(TableInfo.Table.size());
if (NeedPositiveMask) {
encodeULEB128(PositiveMask.getZExtValue(), S);
S.flush();
- for (int i = 0, e = MaskBytes.size(); i != e; ++i)
+ for (unsigned i = 0, e = MaskBytes.size(); i != e; ++i)
TableInfo.Table.push_back(MaskBytes[i]);
} else
TableInfo.Table.push_back(0);
S.resync();
encodeULEB128(NegativeMask.getZExtValue(), S);
S.flush();
- for (int i = 0, e = MaskBytes.size(); i != e; ++i)
+ for (unsigned i = 0, e = MaskBytes.size(); i != e; ++i)
TableInfo.Table.push_back(MaskBytes[i]);
} else
TableInfo.Table.push_back(0);
getIslands(StartBits, EndBits, FieldVals, Insn);
unsigned Size = StartBits.size();
- unsigned I, NumBits;
// Emit the predicate table entry if one is needed.
emitPredicateTableEntry(TableInfo, Opc);
// Check any additional encoding fields needed.
- for (I = Size; I != 0; --I) {
- NumBits = EndBits[I-1] - StartBits[I-1] + 1;
+ for (unsigned I = Size; I != 0; --I) {
+ unsigned NumBits = EndBits[I-1] - StartBits[I-1] + 1;
TableInfo.Table.push_back(MCD::OPC_CheckField);
TableInfo.Table.push_back(StartBits[I-1]);
TableInfo.Table.push_back(NumBits);
S.flush();
// Decoder index
- for (int i = 0, e = Bytes.size(); i != e; ++i)
+ for (unsigned i = 0, e = Bytes.size(); i != e; ++i)
TableInfo.Table.push_back(Bytes[i]);
}
}
}
- unsigned BitIndex, InsnIndex;
+ unsigned BitIndex;
// We maintain BIT_WIDTH copies of the bitAttrs automaton.
// The automaton consumes the corresponding bit from each
else
bitAttrs.push_back(ATTR_NONE);
- for (InsnIndex = 0; InsnIndex < numInstructions; ++InsnIndex) {
+ for (unsigned InsnIndex = 0; InsnIndex < numInstructions; ++InsnIndex) {
insn_t insn;
insnWithID(insn, Opcodes[InsnIndex]);
bitAttr_t RA = ATTR_NONE;
unsigned StartBit = 0;
- for (BitIndex = 0; BitIndex < BitWidth; BitIndex++) {
+ for (BitIndex = 0; BitIndex < BitWidth; ++BitIndex) {
bitAttr_t bitAttr = bitAttrs[BitIndex];
assert(bitAttr != ATTR_NONE && "Bit without attributes");
// for decoding register classes.
// FIXME: This need to be extended to handle instructions with custom
// decoder methods, and operands with (simple) MIOperandInfo's.
- TypedInit *TI = dynamic_cast<TypedInit*>(NI->first);
- RecordRecTy *Type = dynamic_cast<RecordRecTy*>(TI->getType());
+ TypedInit *TI = cast<TypedInit>(NI->first);
+ RecordRecTy *Type = cast<RecordRecTy>(TI->getType());
Record *TypeRecord = Type->getRecord();
bool isReg = false;
if (TypeRecord->isSubClassOf("RegisterOperand"))
RecordVal *DecoderString = TypeRecord->getValue("DecoderMethod");
StringInit *String = DecoderString ?
- dynamic_cast<StringInit*>(DecoderString->getValue()) : 0;
+ dyn_cast<StringInit>(DecoderString->getValue()) : 0;
if (!isReg && String && String->getValue() != "")
Decoder = String->getValue();
for (unsigned bi = 0; bi < Bits.getNumBits(); ++bi) {
VarInit *Var = 0;
- VarBitInit *BI = dynamic_cast<VarBitInit*>(Bits.getBit(bi));
+ VarBitInit *BI = dyn_cast<VarBitInit>(Bits.getBit(bi));
if (BI)
- Var = dynamic_cast<VarInit*>(BI->getVariable());
+ Var = dyn_cast<VarInit>(BI->getBitVar());
else
- Var = dynamic_cast<VarInit*>(Bits.getBit(bi));
+ Var = dyn_cast<VarInit>(Bits.getBit(bi));
if (!Var) {
if (Base != ~0U) {
<< " if (numBits == sizeof(InsnType)*8)\n"
<< " fieldMask = (InsnType)(-1LL);\n"
<< " else\n"
- << " fieldMask = ((1 << numBits) - 1) << startBit;\n"
+ << " fieldMask = (((InsnType)1 << numBits) - 1) << startBit;\n"
<< " return (insn & fieldMask) >> startBit;\n"
<< "}\n\n";
}
<< " uint64_t Bits = STI.getFeatureBits();\n"
<< "\n"
<< " const uint8_t *Ptr = DecodeTable;\n"
- << " uint32_t CurFieldValue;\n"
+ << " uint32_t CurFieldValue = 0;\n"
<< " DecodeStatus S = MCDisassembler::Success;\n"
<< " for (;;) {\n"
<< " ptrdiff_t Loc = Ptr - DecodeTable;\n"
}
DecoderTableInfo TableInfo;
- std::set<unsigned> Sizes;
for (std::map<std::pair<std::string, unsigned>,
std::vector<unsigned> >::const_iterator
I = OpcMap.begin(), E = OpcMap.end(); I != E; ++I) {
projects / oota-llvm.git / blobdiff