Work on ARM backend for DMD started

[solidstate1991 via Digitalmars-d-announce]

While I currently don't have an ARM based hardware that would be 
easy to develop on, I'm planning to use QEMU to emulate some form 
of ARMv6 CPU, as it'll be the main target, as it's still being 
used in devices like the Raspberry Pi. ARMv5 is being considered 
if it doesn't need a lot of work, although I don't see a lot of 
reason behind doing it besides of the possibility of enabling the 
development of homebrew GBA, NDS, GP32, etc stuff.

As I became unemployed recently, I have a lot more time for 
development, so time now isn't an issue. Or at least until I find 
a job, which is hard due to my state as a college student, which 
I'm on the verge of losing it.

I would accept your input on various things, like if I should do 
some adjustments to the in-line assembly stuff, whether I should 
care about thumb (reduced size instruction set, not available on 
some newer targets) or not, etc. Got my hands on some official 
reference manual, it wouldn't hurt if I could research other ones 
too.