private String parseReg(String firstParam) {
	firstParam = firstParam.toUpperCase();
	if (firstParam.contains("$T0"))
	    return "$T0";
	if (firstParam.contains("$T1"))
	    return "$T1";
	if (firstParam.contains("$T2"))
	    return "$T2";
	if (firstParam.contains("$T3"))
	    return "$T3";
	if (firstParam.contains("$T4"))
	    return "$T4";
	if (firstParam.contains("$S0"))
	    return "$S0";
	if (firstParam.contains("$S1"))
	    return "$S1";
	if (firstParam.contains("$S2"))
	    return "$S2";
	if (firstParam.contains("$S3"))
	    return "$S3";

	return "$zero";
    }