AB
Introduced2011
VersionARMv8-R, ARMv8-A, ARMv8.1-A, ARMv8.2-A, ARMv8.3-A, ARMv8.4-A, ARMv8.5-A, ARMv8.6-A, ARMv8.7-A, ARMv8.8-A, ARMv8.9-A, ARMv9.0-A, ARMv9.1-A, ARMv9.2-A, ARMv9.3-A, ARMv9.4-A, ARMv9.5-A, ARMv9.6-A, ARMv9.7-A
EncodingAArch64/A64 and AArch32/A32 use 32-bit instructions, AArch32/T32 (Thumb-2) uses mixed 16- and 32-bit instructions1
EndiannessBi (little as default)
ExtensionsSVE, SVE2, SME, SME2, AES, SM3, SM4, SHA, CRC32, RNDR, TME; All mandatory: Thumb-2, Neon, VFPv4-D16, VFPv4; obsolete: Thumb and Jazelle
Registers
General-purpose31 × 64-bit integer registers1
Floating-point32 × 128-bit registers1 for scalar 32- and 64-bit FP or SIMD FP or integer; or cryptography

ARM AArch64 (64/32-bit)

(echo:: @ )

Footnotes

  1. Grisenthwaite, Richard (2011). “ARMv8-A Technology Preview” (PDF). Archived from the original (PDF) on 11 November 2011. Retrieved 31 October 2011. 2 3