private void checkRegisterAccess(Instruction instr) {

		if (instr.getNumOperands() == 0) {
			return;
		}

		Object[] objs = instr.getOpObjects(0);
		if (objs.length == 0) {
			return;
		}

		if (statusReg.equals(objs[0]) || statusReg.getAddress().equals(objs[0])) {
			handleStatusModification(instr);
		}
		else if (fsrReg.equals(objs[0]) || fsrReg.getAddress().equals(objs[0])) {
			handleFSRModification(instr);
		}
//		else if (isRead(instr, pclReg)){
//			paContext.writeValue(instr.getMaxAddress());
//			paContext.setValueAt(instr, instr.getMaxAddress().add(1).getOffset() >> 9, false);
//		}
	}
Attempt to markup FReg access instruction with register reference.

@param instr
@return register name if identified, else null
Ghidra/Processors/PIC/src/main/java/ghidra/app/plugin/core/analysis/Pic12Analyzer.java