Hi,

Some years ago Graeme and I looked at using thumb and weren't really impressed with the space savings, but lately Phil has been fixing a lot of stuff in OE:

http://lists.linuxtogo.org/pipermail/openembedded-devel/2008-October/006718.html

Since armv4t machines are cache-starved and don't have a VFP unit I'd like to propose that angstrom will use thumb by default for armv4t machines.

If someone can pony up a benchmark for armv5t we can consider switching that as well.

Armv6 has an vfp, so thumb not really worth it, and we don't have any arm1176 based machines to use thumb2 with. Armv7a has 512kB L2 cache, so thumb isn't really needed there.

thoughts, suggestions?

Koen


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