Re: Enable thumb on AT91?

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