[chbot] GCC and recursion

[Charles Manning]

That TIL book is great. I have bought, and lost by lending out, two copies
in the past.

I started playing with Forth in 1984. Quite amazing that the whole
compiler, editor and "operating system" all fitted in less than 32 or
memory.

Are you using soft cores with the FPA or hard cores off on the side?


On Sun, Apr 14, 2024 at 2:54 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Yup, for doing real-work ATmega, STM32, or RISC-V has it, no question.
>
> Having said that, newer projects tend to be FPGA based with a small CPU
> orchestrating complex logic.
>
> I built a Threaded Interpretive Language when I was a kid, based on the
> book of the same name (ISBN 978-0070383609). Ran on a 6809 and was
> hugely weird/fascinating at the time (TIL, not 6809).
>
> On 4/14/2024 2:24 PM, Charles Manning wrote:
> > I really find computer architecture interesting. But I'm taking the
> > other approach that life is too short so I'm jumping in with the RISC V
> > community.
> >
> > Have you looked at some of the tiny Forth machines? eg. Swapforth and
> J1a.
> >
> >
> > On Sun, Apr 14, 2024 at 2:07 PM Mark Atherton <markaren1 at xtra.co.nz
> > <mailto:markaren1 at xtra.co.nz>> wrote:
> >
> >     Ha! I have already implemented RPN, and it works fine. This whole
> >     project is an experiment; interested to see what how far I can push
> >     things before the parser gets ugly.
> >
> >     I guess then next step is to write a small compiler running on an
> x86,
> >     generating P-code to be run on a *tiny* interpreter on the machine
> (and
> >     its associated 128 word limit). There is plenty of micro-code space,
> so
> >     might be able to dream up some complex instructions to make the
> >     interpreter very small.
> >
> >     Oh god, look what you have made me do now... :)
> >
> >
> >     On 4/14/2024 12:06 PM, Charles Manning wrote:
> >      > There is always an equivalent algorithm using arrays etc to make a
> >      > manual stack (ie. looping instead of function calling to get the
> >      > "recursion".).
> >      >
> >      > Sometimes that's all you've got. eg. Fortran 77 etc does not
> provide
> >      > recursion because it is not stack based (like C).
> >      >
> >      > Function calling recursion is a lot easier and cleaner though.
> >      >
> >      > Have you considered just saying sod it and using RPN for your
> >     assembler?
> >      > Well for a first cut anyway.
> >
> >
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