void HexagonMCInstrInfo::replaceDuplex(MCContext &Context, MCInst &MCB,
DuplexCandidate Candidate) {
assert(Candidate.packetIndexI < MCB.size());
assert(Candidate.packetIndexJ < MCB.size());
assert(isBundle(MCB));
MCInst *Duplex =
deriveDuplex(Context, Candidate.iClass,
*MCB.getOperand(Candidate.packetIndexJ).getInst(),
*MCB.getOperand(Candidate.packetIndexI).getInst());
assert(Duplex != nullptr);
MCB.getOperand(Candidate.packetIndexI).setInst(Duplex);
MCB.erase(MCB.begin() + Candidate.packetIndexJ);
}
int64_t HexagonMCInstrInfo::minConstant(MCInst const &MCI, size_t Index) {
auto Sentinal = static_cast<int64_t>(std::numeric_limits<uint32_t>::max())
<< 8;
if (MCI.size() <= Index)
return Sentinal;
MCOperand const &MCO = MCI.getOperand(Index);
if (!MCO.isExpr())
return Sentinal;
int64_t Value;
if (!MCO.getExpr()->evaluateAsAbsolute(Value))
return Sentinal;
return Value;
}
/// tryCompound - Given a bundle check for compound insns when one
/// is found update the contents fo the bundle with the compound insn.
/// If a compound instruction is found then the bundle will have one
/// additional slot.
void HexagonMCInstrInfo::tryCompound(MCInstrInfo const &MCII,
MCContext &Context, MCInst &MCI) {
assert(MCI.getOpcode() == Hexagon::BUNDLE &&
"Non-Bundle where Bundle expected");
// By definition a compound must have 2 insn.
if (MCI.size() < 2)
return;
// Look for compounds until none are found, only update the bundle when
// a compound is found.
while (lookForCompound(MCII, Context, MCI))
;
return;
}
bool HexagonMCInstrInfo::isBundle(MCInst const &MCI) {
auto Result = Hexagon::BUNDLE == MCI.getOpcode();
assert(!Result || (MCI.size() > 0 && MCI.getOperand(0).isImm()));
return Result;
}
size_t HexagonMCInstrInfo::bundleSize(MCInst const &MCI) {
if (HexagonMCInstrInfo::isBundle(MCI))
return (MCI.size() - bundleInstructionsOffset);
else
return (1);
}
