Editing Instruction cycle (section)

=== Control unit ===
The [[control unit]] (CU) decodes the instruction in the [[Instruction register|current instruction register]] (CIR). Then, the CU sends signals to other components within the CPU, such as the [[arithmetic logic unit]] (ALU), or back to memory to fetch operands, or to the [[floating-point unit]] (FPU). The ALU performs arithmetic operations based on specific [[Opcode|opcodes]] in the instruction. For example, in [[Reduced instruction set computer|RISC-V architecture]], funct3 and funct7 opcodes exist to distinguish whether an instruction is a logical or arithmetic operation.