Enable thumb on AT91?

[Eugen Hristev]

On 9/27/23 01:15, Sean Anderson wrote:
> Hi Eugen,
> 
> I noticed that several AT91 boards are quite close to their SPL size
> limit. For example, sama5d27_wlsom1_ek_mmc is just 173 bytes short of
> its limit and doesn't even git with older GCCs. I looked at the
> datasheet for that processor, and noticed that it has thumb support.
> Have you considered enabling SYS_THUMB_BUILD? This shrinks SPL by around
> 30%. I don't have a board to test with, so I don't know if there are any
> technical reasons blocking this.
> 
> --Sean

Hello Sean,

Thumb should be fine for the AT91 architecture.
+ Nicolas and Aubin in CC.
The change would require testing.

Eugen