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[AVR] Add LDS/STS disassemble #146325

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[AVR] Add LDS/STS disassemble #146325

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20 changes: 20 additions & 0 deletions llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -433,6 +433,22 @@ static DecodeStatus decodeLoadStore(MCInst &Inst, unsigned Insn,
return MCDisassembler::Success;
}

static DecodeStatus decodeLoadStore32(MCInst &Inst, unsigned Insn,
uint64_t Address,
const MCDisassembler *Decoder) {
// Get the register that will be loaded or stored.
unsigned RegVal = GPRDecoderTable[(Insn >> 20) & 0x1f];

// Decode LDS/STS
if ((Insn & 0xfc0f0000) == 0x90000000) {
Inst.setOpcode((Insn & 0x02000000) ? AVR::STSKRr : AVR::LDSRdK);
Inst.addOperand(MCOperand::createReg(RegVal));
Inst.addOperand(MCOperand::createImm(Insn & 0xFFFF));
return MCDisassembler::Success;
}
return MCDisassembler::Fail;
}

static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
uint64_t &Size, uint32_t &Insn) {
if (Bytes.size() < 2) {
Expand Down Expand Up @@ -523,6 +539,10 @@ DecodeStatus AVRDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
return Result;
}

Result = decodeLoadStore32(Instr, Insn, Address, this);
if (Result != MCDisassembler::Fail)
return Result;

return MCDisassembler::Fail;
}
}
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