Don't test for LDREX then use LDREXB
Presence of LDREX does not imply presence of LDREXB.
If LDREX is not available SWP was being used, so a word sized operation is appropriate.
Presence of LDREX does not imply presence of LDREXB.
If LDREX is not available SWP was being used, so a word sized operation is appropriate.