[Coco] Re: GCC: DFLOAT / DIRECT_PAGE

[John E. Malmberg]

Theodore A. Evans wrote:
<snip>
Thanks for the research.

GCC knows about IEEE floats, and it knows two other float types from 
popular pre-IEEE standard that are built into the hardware.

I do not know how much work it would be to add COCO float type, and that 
  is not something that I will be pursuing from the compiler point of 
view.  Since it is open source, it is fair game for anyone else though.

It looks like to make the compiler happy, I will need to figure out how 
to have the 6809 manipulate a IEEE double presision float.


One thing I forgot to mention about the direct page, for some Motorola 
processors, GCC uses the direct pages as banks of registers.

If I can get the direct page stuff implemented the way that I envision, 
I think that everyone will be happy with the result, because all usage 
patterns that I have seen reported here could be coded.


I am going to look at the Dfloat issue tonight if I get some spare time 
to see if I can find out how to implement it.


-John
wb8tyw at qsl.net
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