static ImmediateOrRegister getOperand2(int instruction) {
boolean iBit = isIBitSet(instruction);
ImmediateOrRegister operand2 = null;
if (iBit) {
operand2 = new Immediate(new Short((short) extractSignedIntFromNBits(instruction, 13)));
} else {
operand2 = SPARCRegisters.getRegister(getSourceRegister2(instruction));
}
return operand2;
}
Instruction decodeReadWrite(
int instruction, SPARCInstructionFactory factory, int rs1Num, int rdNum) {
Instruction instr = null;
int specialReg = specialRegNum;
if (rs1Num == 0) specialReg = SPARCSpecialRegisters.Y;
if (rs1Num == 15 && rdNum == 0) {
instr = factory.newStbarInstruction();
} else {
instr = factory.newReadInstruction(specialReg, rs1Num, SPARCRegisters.getRegister(rdNum));
}
return instr;
}