Extracted from http://re-eject.gbadev.org/index.php web site, here are some very good documents to help the programmer in his everyday job.

1) Re "assembler dtirectices.pdf":
Out of the blue, comes a brand new reference, this time for GAS with ARM.
This reference contains only information relevant to doing ARM/THUMB Assembly with GAS (the GNU ASsembler). It contains a listing of all the known relevant (to ARM-Thumb-Elf Targets) Assembler Directivs. If you notice something that's wrong, please do mail

2) Re "table of instruction set code.pdf"
For the time being, I have made available a beta version of the new Thumb Reference. I still need to add information about the encoding of the branch link/link exchange instructions, Symbols reference, and if there's enough room then info for ARM with the GNU Assembler (but after more thought, I should do a full seperate reference for that). As always, this is designed for maximum quality color printing. High quality black and white is acceptable too, just its difficult to make sense of the color coding.