Switch between Thumb state and ThumbEE state.
ENTERX causes a change from Thumb state to ThumbEE
state, or has no effect in ThumbEE state.
LEAVEX causes a change from ThumbEE state to
Thumb state, or has no effect in Thumb state.
Do not use
LEAVEX in an
These instructions are not available in the ARM instruction set.
These 32-bit Thumb and ThumbEE instructions are available in ARMv7, with ThumbEE support.
There are no 16-bit Thumb versions of these instructions.