ARM ISA

General

History Families

Variants

26-bit 32-bit 64-bit

Extensions

ARM Thumb ThumbEE Jazelle VFP Neon Helium

Topics

Addressing Modes Registers Assembly Interrupts CPSR Modes Calling Convention Microarchitectures

Versions(all)

ARMv1 ARMv2 ARMv2a ARMv3 ARMv4 ARMv5 ARMv6 ARMv7 ARMv8 ARMv8.1 ARMv8.2 ARMv8.3

ARM Versions are the architectural version numbers. ARM architecture versions always use the ARMv# notations. Architecture versions are often confused with the various ARM implementations which historically used similar notations ARM#. Note that for the implementations, the number does not necessarily correlates to the architecture version used. Over the years, a number of additional implementations were designed by third party companies such as DEC, Intel, Qualcomm and Apple.

Versions

ISA	Variant	Microarchitectures
ARMv1		Acorn	ARM1
ARMv2		Acorn	ARM2
ARMv2a		Acorn	ARM3
		ARM	ARM250
ARMv3		ARM	ARM6, ARM7
ARMv4	ARMv4	ARM	ARM8
		DEC	StrongARM
	ARMv4T	ARM	ARM7TDMI, ARM9TDMI
ARMv5	ARMv5TE	ARM	ARM7EJ, ARM9E, ARM10E
		Intel	XScale
ARMv6	ARMv6	ARM	ARM11
	ARMv6-M	ARM	Cortex-M0, Cortex-M1
ARMv7	ARMv7-A	ARM	Cortex-A5, Cortex-A7, Cortex-A8, Cortex-A9, Cortex-A12, Cortex-A15, Cortex-A17
		Apple	Swift
		Marvell	Sheeva PJ4
		Qualcomm	Scorpion, Krait
	ARMv7-R	ARM	Cortex-R4, Cortex-R5, Cortex-R7
	ARMv7-M	ARM	Cortex-M3
	ARMv7E-M	ARM	Cortex-M4
ARMv8	ARMv8-A	ARM	Cortex-A35, Cortex-A53, Cortex-A57, Cortex-A72, Cortex-A73
		Apple	Cyclone, Typhoon, Twister, Hurricane, Zephyr
		AMD	K12
		AppliedMicro	Storm, Shadowcat, Skylark
		Nvidia	Denver
		Samsung	Mongoose 1, Mongoose 2
		Qualcomm	Kryo, Falkor
ARMv8.1	ARMv8.1-A
ARMv8.2	ARMv8.2-A	ARM	Cortex-A55, Cortex-A75
		Ampere	Shadowcat
ARMv8.3	ARMv8.3-A	Qualcomm	Saphira

See also

• x86 Extensions