指令集的英文怎么说？

A instruction set, also commonly referred to as an instruction set architecture or processor architecture, is a set of instructions that a processor (or microprocessor) can understand and execute. It is the language used to communicate instructions to the processor, and it is usually specific to a particular processor series or family. Instruction sets are the fundamental build blocks of a processor and thus form the basis for modern computing.

An instruction set can be pided into two parts: the instruction format and the opcode. The instruction format determines the layout of the data, how the instructions are encoded and the number of operands that can be associated with each instruction. An opcode is a short instruction code that describes an operation or functional unit. The opcode is usually composed of two parts - the operation code and the mnemonic. The operation code indicates the type of operation, such as arithmetic, logical, memory, or input-output. The mnemonic provides a symbolic representation of the operation.

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Instruction sets are typically implemented in processor hardware or in firmware, which is software that is stored in read-only memory (ROM) and executed directly by the processor. They can also be implemented in microcode, which is a small set of microinstructions placed directly in the processor core or developed as part of a processor's architecture.

February 24, 2021

There are three main types of instruction sets: Reduced Instruction Set Computer (RISC), Complex Instruction Set Computer (CISC), and very long instruction word (VLIW). RISC instruction sets are designed to reduce the instruction cycle times and typically use less complex instruction opcodes than CISC instruction sets. CISC instruction sets are typically more complex and include a wider range of instructions, allowing for optimized instruction execution. Finally, VLIW instruction sets are typically composed of multiple operation code words (or opcodes) that are combined to form very long instructions that can be executed in one cycle.

No matter which type of instruction set an architecture uses, the goals of processor designers remain the same: speed and efficiency. A good instruction set should be able to optimize programs for size, high speed, low power, and flexibility. In addition, instruction sets should keep track of which instructions have been executed in order to determine where to jump to when executing subsequent instructions. In the end, all of these features have a large impact on the performance of a processor.

In the modern world, instruction sets are incredibly important in creating powerful, efficient, and flexible processors. They continue to evolve to meet the needs of modern computing, which drives innovation and progress for the entire computing industry.