private void handleComputedFlow(Instruction instr, long pclByte, int refOpIndex) {
		if (pclathContext.hasValue()) {
			long offset = ((pclathContext.longValue() << 8) + pclByte) * 2;
			Address destAddr = instr.getMinAddress().getNewAddress(offset);
			refMgr.addMemoryReference(instr.getMinAddress(), destAddr, instr.getFlowType(),
				SourceType.ANALYSIS, refOpIndex);
			if (listing.getUndefinedDataAt(destAddr) != null) {
				try {
					program.getProgramContext().setValue(pclathReg, destAddr, destAddr,
						pclathContext.value());
					disassembleAt(destAddr);
				}
				catch (ContextChangeException e) {
					Msg.error(this, "Unexpected Error", e);
				}
			}
		}
	}
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