A MIPS ALU

• We need AND and OR.
• Also ADD
• Inputs: A, B , cin
• An invert for B
• An operation - or two bit control line.
• NOR can be done by not(A+B) (a not A line)
• SLT instruction: Outputs a 1 if A <B, Really MSB of subtraction
• BEQ, BNE need to know if the result is a zero
• Overflow Detection.
• A MIPS ALU S