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	Vendor	Microarchitectures
ARMv1	ARMv1	Acorn	ARM1
ARMv2	ARMv2	Acorn	ARM2
	ARMv2a	Acorn	ARM3
		ARM	ARM250
ARMv3	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
		Cavium	ThunderX1
		Nvidia	Denver
		Phytium	Xiaomi
		Samsung	M1, M2, M3
		Qualcomm	Kryo, Falkor
ARMv8.1	ARMv8.1-A	Cavium	Vulcan
ARMv8.2	ARMv8.2-A	ARM	• Cortex-A55, Cortex-A75 (Prometheus), • Cortex-A76, Cortex-A77, Cortex-A78 (Hercules)
			• Neoverse N1 (Ares), Neoverse E1 (Helios)
		Ampere	Quicksilver
		Nvidia	Carmel
		Samsung	M4, M5
ARMv8.3	ARMv8.3-A	Qualcomm	Saphira
ARMv8.4	ARMv8.4-A ARMv8.5-A	ARM	• Neoverse V1 (Zeus) • Apple A13, S6, S7, S8; Apple A14, M1
ARMv8.6	ARMv8.6-A ARMv8.7-A	ARM	Apple A15, A16, A17, M2, M3 Qualcomm Oryon
ARMv9	ARMv9.0-A	ARM	• Cortex-A510, Cortex-A710, Cortex-A715 • Cortex-X2, Cortex-X3
			• Neoverse N2 (Perseus), Neoverse V2 (Demeter)
ARMv9.1	ARMv9.1-A	ARM
ARMv9.2	ARMv9.2-A	ARM	Cortex-A520, Cortex-A720, Cortex-A725 Cortex-X4, Cortex-X925, Cortex-X930 Neoverse N3 (Hermes), Neoverse V3 (Poseidon) Apple A18, Apple M4
ARMv9.3	ARMv9.3-A	ARM
ARMv9.4	ARMv9.4-A	ARM

Part numbers

ARM • Cortex

HW Part number	Vendor/Manuf
0x41	ARM
0x42	Broadcom
0x43	Cavium
0x44	DEC
0x46	Fujitsu
0x48	HiSilicon
0x49	Infineon
0x4d	Motorola NXP (Freescale)
0x4e	NVIDIA (nvidia)
0x50	APM
0x51	Qualcomm
0x53	Samsung
0x56	Marvell
0x61	Apple
0x66	Faraday
0x69	Intel
0x6d	Microsoft
0x70	Phytium
0xc0	Ampere

See also

• x86 Extensions