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

Thumb Execution Environment (ThumbEE) also called Jazelle-RCT (Jazelle Runtime Compilation Target) was an ARM ISA extension designed to aid Just-In-Time (JIT) or Ahead-Of-Time (AOT) compilers by reducing the effective compiled code size, reducing memory footprint and immproving power efficiency. ThumbEE was introduced with the ARMv7-A.

ThumbEE has been deprecated by ARM.

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