The repository contains ARM64 (AArch64) instruction encoding in a machine-readable JSON:
* ISA_v83A_A64_xml_00bet6_instructions.json contains encoding of every instruction, including ARM64v2/v3 extensions.
* ISA_v83A_A64_xml_00bet6_group_class.json contains hierarchical encoding ARM64 top level -> Instruction group (e.g. “Data Processing — Immediate”) -> Instruction class (e.g. “Add/subtract (immediate)”). No instruction encodings in this file.
The simple and easyly-organised JSON data was extracted from a machine-readable ARM64 specs. A64 ISA XML for Armv8.3 ver. 00bet6.1 released by ARM.