Question

Provide a minimal set of MIPS instructions that may be used to implement the following pseudoinstruction: not $t1, $t2 // bit-wise invert

Answer 1

xori t1,t2,-1

Step-by-step explanation:

the not instruction is converted into xor immediate as not t1,t2 would mean that which is equal to xor

t1 t2 nott1 nott2 result

0 1 1 0 0

1 0 0 1 0

1 1 0 0 1

0 0 1 1 0