public static int getOpcode(String s) throws UnknownInstructionException {
		if (opcodeTable == null) {
			generateOpcodeTable();
		}
		Integer i = opcodeTable.get(s);
		if (i == null) {
			throw new UnknownInstructionException();
		}
		return i.intValue();
	}
Get the p-code op code for the given mnemonic string.
@param s is the mnemonic string
@return the op code

@throws UnknownInstructionException if there is no matching mnemonic
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeOp.java