Command: SAR- Shift arithmetic right
Arguments: OP: register or memory location; QUANTITY: immediate
Usage: SAR OP, QUANTITY
Effects: Shifts all bits of OP right QUANTITY times and adds doubles the bit at the beginning.
Flags to be set: OF, SF, ZF, PF, CF
Misc: Carry flag contains bit that was shifted out last.
Corresponds to signed division by 2 QUANTITY times