T32 Instruction Set
The T32 instruction set, known as Thumb in pre-Armv8 architectures, is a mixed 32- and 16-bit length instruction set that offers the designer excellent code density for minimal system memory size and cost.
T32 provides enhanced levels of performance, energy efficiency, and code density for a wide range of embedded applications. Designers can use both T32 and A32 instructions sets and therefore have the flexibility to emphasize performance or code size on a subroutine level as their applications require. T32 is supported across all architecture profiles, and is the only instruction set supported by the M-Profile architecture.