What is the difference between riscv architecture and arm

The difference between riscv architecture and arm: 1. Design philosophy. The design philosophy of riscv is to simplify the instruction set and improve the efficiency of instruction execution. The design philosophy of arm is to add some special instructions and registers while maintaining the simplicity of the instruction set. , improve performance in specific application scenarios; 2. Openness, riscv instruction set architecture specifications are publicly available and can be used free of charge, arm has some restrictions on the definition and use of its instruction set architecture; 3. Application fields, riscv is used in embedded systems, mobile devices, high-performance computing, etc. ARM is used in mobile devices and embedded systems.

#The operating environment of this article: Windows 10 system, Dell G3 computer.

RISC-V architecture and ARM architecture are two different instruction set architectures. They have some differences in design ideas, openness, application fields, etc. The two architectures will be compared from several aspects below.

Design philosophy:

RISC-V architecture is a reduced instruction set (Reduced Instruction Set Computing, RISC) architecture. Its design philosophy is to simplify the instruction set. Improve instruction execution efficiency. The instruction set design of the RISC-V architecture is simple and clear, with a hierarchical structure, a small number of instructions, and a regular instruction format. It uses a three-address instruction format based on the Load/Store structure to separate data transfer instructions from arithmetic logic instructions, reducing the complexity of the instructions.

ARM architecture is a Reduced Instruction Set Computing (RISC) architecture. Its design concept is to maintain the simplicity of the instruction set while adding some special instructions and registers to improve specific application scenarios. lower performance. The instruction set design of the ARM architecture is more complex and flexible, including more instructions and registers, which can meet the needs of different application scenarios.

Openness:

RISC architecture is an open instruction set architecture. Its instruction set architecture specifications are public and can be used free of charge. Anyone can design, manufacture and sell processors based on the RISC-V architecture. This openness has made the RISC-V architecture widely noticed and used in academia and open source communities.

The ARM architecture is a closed-source commercial instruction set architecture. ARM has some restrictions on the definition and use of its instruction set architecture. Licensing the ARM architecture requires payment, and only authorized manufacturers can design, manufacture and sell ARM processors. This closed-source nature makes the ARM architecture widely used in the commercial field, and ARM processors have a high market share in mobile devices, embedded systems, servers and other fields.

Application fields:

There are some differences between RISC-V architecture and ARM architecture in application fields.

RISC-V architecture is suitable for various application scenarios due to its openness and flexibility. It can be used in embedded systems, mobile devices, servers, high-performance computing and other fields. In academia and open source communities, researchers and developers can innovate and experiment based on the RISC-V architecture and promote the development of instruction set architectures.

ARM architecture is more used in mobile devices and embedded systems due to its wide authorization and market share. ARM processors have a high market share in smartphones, tablets, Internet of Things devices and other fields. At the same time, the ARM architecture is also used in the server field, especially in low-power, high-performance servers.

Summary

There are some differences between RISC-V architecture and ARM architecture in terms of design ideas, openness and application fields. The RISC-V architecture focuses on the simplicity and openness of the instruction set and is suitable for various application scenarios. The ARM architecture focuses on the flexibility of the instruction set and commercial applications, and is mainly used in mobile devices and embedded systems.

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