public void EX()
throws IrregularStringOfBitsException, IntegerOverflowException, TwosComplementSumException {
// getting strings from temporary registers
String rt = TR[RT_FIELD].getBinString();
String rs = TR[RS_FIELD].getBinString();
String shift = "", rd;
// getting the low order 5 bits from rs register
shift = rs.substring(59);
// cutting the high part of register
rt = rt.substring(32, 64);
int shift_value = Converter.binToInt(shift, true);
// composing new shifted value and performing sign extension
StringBuffer buf = new StringBuffer();
for (int i = 0; i < 32; i++) {
buf.append(rt.charAt(0));
}
buf.append(rt.substring(shift_value));
// filling the remaining bits with 0
for (int i = 0; i < shift_value; i++) {
buf.append('0');
}
String target = new String(buf);
TR[RD_FIELD].setBits(target, 0);
if (enableForwarding) {
doWB();
}
}
