Instruction

An instruction is the basic elementary operations that a CPU can perform. 1

There are different kinds of instructions: - R-Type Instructions - Register Instructions - rd = rs funct rt - rd = destination - rs = source - rt = target - funct = the bits of the instruction to perform - I-Type Instructions - Immediate Instruction - rt = rs op Sign Extended Immediate - SEI means prepending the most significant bit of the immediate to the immediate until it is 32 bits big - J-Type Instructions - Jump Instructions - PC = (PC+4)_{31:28}:addr:00, where ':' means concatenate - PC = program counter; the address of the instruction that we are currently working on right now

  1. https://www.geeksforgeeks.org/computer-organization-basic-computer-instructions/ ↩