[Buildroot] [PATCH 2/3] New entry for the Cortex-M4 processor

Peter Korsgaard peter at korsgaard.com
Thu Sep 24 21:02:58 UTC 2015


>>>>> "Yann" == Yann E MORIN <yann.morin.1998 at free.fr> writes:

Hi,

 > It is my understanding that -mthumb will generate Thumb2 instructions on
 > cores that have Thumb2 (e.g. Cortex), and Thumb (aka Thumb1) on cores
 > that do not have Thumb2.

 > Also, since Thumb2 is a strict superset of Thumb, then having Thumb2
 > means having Thumb, at least from an instruction set point of view.

 > I believe Thumb2 should select Thumb.

Yes, that sounds sensible.

-- 
Bye, Peter Korsgaard



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