30.1.1. ARMv8 vs ARMv7 vs AArch64 vs AArch32
ARMv7 is the older architecture described at: ARMv7 architecture reference manual.
ARMv8 is the newer architecture ISA released in 2013 and described at: ARMv8 architecture reference manual. It can be in either of two states:
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aarch64
In the lose terminology of this repository:
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armmeans basically AArch32 -
aarch64means ARMv8 AArch64
ARMv8 has had several updates since its release:
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v8.1: 2014
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v8.2: 2016
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v8.3: 2016
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v8.4: TODO
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v8.5: 2018
They are described at: ARMv8 architecture reference manual A1.7 "ARMv8 architecture extensions".