🚀 go-pugleaf

Hi All!

I am seariously searching some specific information on retargeting of the
GNU-compiler.

In particular, the project-group i am participating (don't know the equivalent
in other countries, imagine twelve students working together for one year to
get a specific problem solved) is designing and implementing a general purpose
micro processor based on FPGAs (two Xilinx xc4005). Field programmable gate
arrays (FPGAs) are runtime reconfigurable logic cell arrays, our processor will
(er, at least, we have that in mind) support runtime
reconstruction/reconfiguration/command-set-alteration.

We plan to retarget GNU to produce Assembler code for our processor, and now we
are trying to design the machine for that task. The documentation i've read so
far (Compiler Doc's 2.4.0) is rarely helpfull in this case, it describes how to
port and retarget GNU to an existing processor, but we work the other way
round. The question left is: What are the minimal necessities (number of
registers, supported commands, memory adressing, ...) to be able to retarget
GNU to our processor?

If anybody knows where to find these information, please give me a hint.

Many thanks in advance,
      Christian.

(please excuse my poor english, it's not my native language)
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