1. 1c640a6 arm: Migrate SYS_THUMB_BUILD to Kconfig, introduce SPL_SYS_THUMB_BUILD by Tom Rini · Sat Mar 18 09:01:44 2017 -0400
  2. a382322 arm: support Thumb-1 with CONFIG_SYS_THUMB_BUILD by Albert ARIBAUD · Fri Oct 23 18:06:40 2015 +0200
  3. a257f2e arm: build arch memset/memcpy in Thumb2 mode by Stefan Agner · Thu Dec 18 18:10:33 2014 +0100
  4. 93416c1 arm: Use optimized memcpy and memset from linux by Matthias Weisser · Thu Mar 10 21:36:32 2011 +0000