public void executeBLTZAL(Instruction instruction) { 
		/* -- Branch on less than zero and link

	Description:
	Branches if the register is less than zero and saves the return address in $31
	Operation:
	if $s < 0 $31 = PC + 8 (or nPC + 4); advance_pc (offset << 2)); else advance_pc (4);
	Syntax:
	bltzal $s, offset
	Encoding:
	0000 01ss sss1 0000 iiii iiii iiii iiii
		 */ 
	}