Announced in October 2011, [13] Armv8-A (often called ARMv8 while the Armv8-R is also available) represents a fundamental change to the ARM architecture. It supports two Execution states : a 64-bit state named AArch64 and a 32-bit state named AArch32 .

This is a table of 64/32-bit central processing units that implement the ARMv8-A instruction set architecture and mandatory or optional extensions of it. Most chips support the 32-bit ARMv7-A for legacy applications.

2015年5月15日 · The new Cortex-A Series Programmer's Guide for ARMv8-A is available now and does not require a click-through agreement to download. Besides a general introduction to the ARMv8-A architecture, the guide covers: The ARMv8-A A64 and A32 instructions sets

AArch64 was introduced in ARMv8-A and is included in subsequent versions of ARMv8-A, and in all versions of ARMv9-A. It was also introduced in ARMv8-R as an option, after its introduction in ARMv8-A; it is not included in ARMv8-M.

This guide examines the features in Armv8-A and Armv9-A that help to mitigate against software attacks, such as ROP and JOP attacks. The guide covers pointer authentication, branch target authentication, and memory tagging.

Armv8-A The Armv8-A architecture introduces the ability to use 64-bit and 32-bit Execution states, known as AArch64 and AArch32 respectively. The AArch64 Execution state supports the A64 instruction set.

2020年7月3日 · This guide introduces the A64 instruction set, used in the 64 -bit Armv8-A architecture, also known as AArch64. We will not cover every single instruction in this guide.

2014年12月2日 · ARMv8.1 is the first set of changes that ARM is introducing to the latest version of its ARMv8 A-profile architecture, grouped to help the ecosystem manage tools and software support alongside the large numbers of ARMv8-A based processors and products in development or production today.

At a high level, ARMv8-A describes both a 32-bit and 64-bit architecture, respectively called AArch32 and AArch64. AArch32 is the ARMv8-A 32-bit execution state, that uses 32-bit general purpose registers, a 32-bit program counter (PC), stack pointer (SP), and link register (LR).

This guide introduces memory systems in the Armv8-A architecture. These systems are detailed through The memory model, Memory types, Memory attributes and Barriers.