Re: [avr-llvm-devel] Load / Store

[Kevin S. <sch...@kw...>]

First, thanks for the all work you've done, Borja.

>Another thing, i dont know how feasible is doing this, but should we make
>program and data space addrs transparent to the user?

If you're asking what I think you're asking, notation for this will be part
of the next version of the C standard. The approved final draft of this, TR
18037 "Extensions to support embedded processors", is available at
<http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1275.pdf>. See "Named
Address Spaces" in section 5. I believe LLVM can now support this directly.

In the long run, I think it would be ideal to have code pointers be either
two or three bytes depending on the processor model. This would imply
supporting 24-bit integers as well; it looks like LLVM can do this now,
though it couldn't when I looked at using it for AVR a couple years ago. It
would also be nice to have one-byte pointers (i.e. an additional address
space) to efficiently reference I/O registers.

-- 
Kevin Schoedel <sch...@kw...> VA3TCS