Arm64 — V8a

Today, ARMv8-A is effectively the baseline for any non-x86 computing device. Its revisions (ARMv8.1 through ARMv8.7) have added features like atomic instructions (LSE), RAS extensions, memory tagging, and BFloat16 for AI. But the core ISA remains the 2011 design, and it has proven remarkably future-proof. With the introduction of ARMv9 (which extends rather than replaces ARMv8-A), it’s clear that ARMv8-A’s influence will be felt for another decade.

It introduces two main execution states: arm64 v8a

For a long time, critics argued ARM couldn't handle "Pro" workloads. That argument died when Apple transitioned to its M-series chips, built on ARMv8-A. By leveraging the high width and low power consumption of ARM64, they proved that you could have a fanless laptop that edits 8K video. Today, ARMv8-A is effectively the baseline for any