@Override
	public int hashCode() {
		return opcode + seqnum.hashCode();
	}
Decode p-code from a stream

@param decoder is the stream decoder
@param pfact factory used to create p-code correctly

@return new PcodeOp
@throws DecoderException if encodings are invalid
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeOp.java