private boolean isRead(Instruction instr, Register reg) {
		Object[] objs = instr.getInputObjects();
		for (Object obj : objs) {
			if (obj instanceof Address && reg.getAddress().equals(obj)) {
				return true;
			}
		}
		return 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/Pic17c7xxAnalyzer.java