uint32_t HexagonMCCodeEmitter::parseBits(size_t Instruction, size_t Last,
MCInst const &MCB,
MCInst const &MCI) const {
- bool Duplex = HexagonMCInstrInfo::isDuplex(MCII, MCI);
if (Instruction == 0) {
if (HexagonMCInstrInfo::isInnerLoop(MCB)) {
- assert(!Duplex);
assert(Instruction != Last);
return HexagonII::INST_PARSE_LOOP_END;
}
}
if (Instruction == 1) {
if (HexagonMCInstrInfo::isOuterLoop(MCB)) {
- assert(!Duplex);
assert(Instruction != Last);
return HexagonII::INST_PARSE_LOOP_END;
}
}
- if (Duplex) {
- assert(Instruction == Last);
- return HexagonII::INST_PARSE_DUPLEX;
- }
if(Instruction == Last)
return HexagonII::INST_PARSE_PACKET_END;
return HexagonII::INST_PARSE_NOT_END;
llvm_unreachable("Unimplemented Instruction");
}
Binary |= Parse;
-
- // if we need to emit a duplexed instruction
- if (HMB.getOpcode() >= Hexagon::DuplexIClass0 &&
- HMB.getOpcode() <= Hexagon::DuplexIClassF) {
- assert(Parse == HexagonII::INST_PARSE_DUPLEX &&
- "Emitting duplex without duplex parse bits");
- unsigned dupIClass;
- switch (HMB.getOpcode()) {
- case Hexagon::DuplexIClass0:
- dupIClass = 0;
- break;
- case Hexagon::DuplexIClass1:
- dupIClass = 1;
- break;
- case Hexagon::DuplexIClass2:
- dupIClass = 2;
- break;
- case Hexagon::DuplexIClass3:
- dupIClass = 3;
- break;
- case Hexagon::DuplexIClass4:
- dupIClass = 4;
- break;
- case Hexagon::DuplexIClass5:
- dupIClass = 5;
- break;
- case Hexagon::DuplexIClass6:
- dupIClass = 6;
- break;
- case Hexagon::DuplexIClass7:
- dupIClass = 7;
- break;
- case Hexagon::DuplexIClass8:
- dupIClass = 8;
- break;
- case Hexagon::DuplexIClass9:
- dupIClass = 9;
- break;
- case Hexagon::DuplexIClassA:
- dupIClass = 10;
- break;
- case Hexagon::DuplexIClassB:
- dupIClass = 11;
- break;
- case Hexagon::DuplexIClassC:
- dupIClass = 12;
- break;
- case Hexagon::DuplexIClassD:
- dupIClass = 13;
- break;
- case Hexagon::DuplexIClassE:
- dupIClass = 14;
- break;
- case Hexagon::DuplexIClassF:
- dupIClass = 15;
- break;
- default:
- llvm_unreachable("Unimplemented DuplexIClass");
- break;
- }
- // 29 is the bit position.
- // 0b1110 =0xE bits are masked off and down shifted by 1 bit.
- // Last bit is moved to bit position 13
- Binary = ((dupIClass & 0xE) << (29 - 1)) | ((dupIClass & 0x1) << 13);
-
- const MCInst *subInst0 = HMB.getOperand(0).getInst();
- const MCInst *subInst1 = HMB.getOperand(1).getInst();
-
- // get subinstruction slot 0
- unsigned subInstSlot0Bits = getBinaryCodeForInstr(*subInst0, Fixups, STI);
- // get subinstruction slot 1
- unsigned subInstSlot1Bits = getBinaryCodeForInstr(*subInst1, Fixups, STI);
-
- Binary |= subInstSlot0Bits | (subInstSlot1Bits << 16);
- }
support::endian::Writer<support::little>(OS).write<uint32_t>(Binary);
++MCNumEmitted;
}