Re: [RFC/PATCH 0/3] ARM: Use udiv/sdiv for __aeabi_{u}idiv library functions

Peter Maydell
2015-11-22T13:29:51Z

On 21 November 2015 at 23:21, Arnd Bergmann <arnd@arndb.de> wrote:
> Regarding PJ4, it's still unclear whether that has the same
> problem and it only reports idivt when it actually supports idiva,
> or whether the lack of idiva support on PJ4 is instead the reason
> why the ARM ARM was updated to have separate flags.

SDIV/IDIV were originally introduced for R and M profile only
and there the Thumb encodings of SDIV/IDIV are mandatory
whereas the ARM ones are optional (and weren't initially
defined at all). So if you're looking for CPUs with only the
Thumb encodings I would try checking older R profile cores
like the Cortex-R4.

thanks
-- PMM