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ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of RISC instruction set architectures (ISAs) for computer processors. Arm Ltd. develops the ISAs and licenses them to other companies, who build the physical devices that use the instruction set.
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ARM architecture is a computer CPU architecture used in...
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Learn about the Arm CPU architecture, a family of reduced instruction set computing (RISC) architectures for computer processors. Explore the benefits, features, profiles, and implementations of the Arm architecture, as well as the latest versions and use cases.
Learn about the Arm architecture, the foundation for innovation in the digital world. Explore the CPU, security, system, and graphics architectures, and access the tools, products, and services for Arm-based devices.
1 Overview. The Arm architecture provides the foundations for the design of a processor or core, things we refer to as a Processing Element (PE). The Arm architecture is used in a range of technologies, integrated into System-on-Chip (SoC) devices such as smartphones, microcomputers, embedded devices, and even servers.
- The Arm Computer Architecture
- Arm Isas and Execution State
- Arm Architectures
- The Cortex Series
- Conclusion
Due to the fact that Arm licenses out its architecture, there are both Arm designed microarchitectures and third-party microarchitectures. Arm releases an architecture, and other companies can implement that in their own design. In fact, the Arm reference manualdoes not lay out any specific microarchitecture, but instead defines the “behavior of an...
With the announcement of Armv8, the first 64-bit Arm architecture, a clarification of the ISAs became appropriate. The original 32-bit Arm ISA was re-branded A32, while the new 64-bit ISA was dubbed A64. Thumb became T32. A32 and T32, while backwards compatible with the previous versions, were expanded upon in Armv8. To maintain compatibility with ...
The Arm architectures are easy to spot because they always have a 'v' in their name. As mentioned earlier, Armv1 was the first Arm architecture, while Armv4T introduced the Thumb instruction set. The Arm11 family includes the Armv6 architecture along with a few other variations such as Armv6T2 and Armv6K. After Arm11, the families were reorganized ...
The modern Arm families are the Cortex series and include three architecture profiles: Cortex-A, Cortex-R, and Cortex-M. Any cores with this designation are microarchitectures designed in-house by Arm. The Cortex-A family are primarily considered application processors with OS and third-party application support. This means they can end up in appli...
In this article, we took a bird's-eye view of the Arm computer architecture, with a focus on the different architectures and the instruction sets that they use. We also looked at the different execution states within an Armv8 core and how different architectures are classified into families. Specifically, we looked at the Cortex series of Arm cores...
ARM is a family of RISC instruction set architectures (ISAs) for computer processors. Arm Ltd. develops the ISAs and licenses them to other companies, who build the physical devices that use the instruction set. It also designs and licenses cores that implement these ISAs.
