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  • From the CPU's point of view, how does it distinguish an assembly code is an ARM code or a Thumb code?

    From the CPU's point of view, how does it distinguish an assembly code is an ARM code or a Thumb code?

    Is there some signal bit represent the code is ARM or Thumb code, this is just my guess.

  • How to understand SDIV instruction availability?

    Hi,

    When I read Thumb-2 instruction manual, it is not clear to me about SDIV availability. Especially I do not understand the last line "are not available in ARM state."

    Could you explain it to me?

    Thanks,

    New functionality introduced with Thumb…