romcc

After a lot of pound the code generator seems stable, and I can take
a break to release romcc.

Currently it appears that any time it completes without error
the code generated is correct.

And most importantly with a few minor tweaks it compiles the
code written for l440gx memory initialization, before the compiler
was written.

Currently ``constant propagation'', ineffectual code elimination (code
that does not affect the output), a good register allocator and always
inlining are the only optimizations implemented.

On the wishlist are:
- using the mmx & sse registers on x86.
- x86-64 and Itanium ports.
- struct support
- non string constant initializers.
- A bibliography.

But it should be good enough to start playing with.
The version gets to be 1.0 when the compiler is useful enough to
compile a LinuxBIOS port.

ftp://ftp.lnxi.com/pub/src/linuxbios/romcc-0.21.tar.gz

Eric

[Alexander Amelkin]

Hello Eric,

Monday, April 7, 2003, 10:54:54 PM, you wrote:

EWB> After a lot of pound the code generator seems stable, and I can take
EWB> a break to release romcc.

May I dare to ask what romcc is? :)

With best regards,
Alexander  mailto:[e-mail]

P.S. To all the developers: I noticed "David Woodhouse" in the list of
developers at linuxbios.org. Is that the guy from Tyan or just someone
with the same name? I knew one guy from Tyan by the name of Dave
Woodhouse. So I wonder if that's him...

Alexander Amelkin  writes:
> Hello Eric,
>
> Monday, April 7, 2003, 10:54:54 PM, you wrote:
>
> EWB> After a lot of pound the code generator seems stable, and I can take

^^^^^== pounding ( I should learn english :)
> EWB> a break to release romcc.
>
> May I dare to ask what romcc is? :)

Sorry I guess I should have been a little more clear.

There has been a long standing issue with LinuxBIOS that much
of the code needs to be written in assembly because it is
run before memory is initialized, and so there is not a stack
available.

romcc is a small c compiler that generates code that runs without
a stack.  The full feature set of C is not available but as much
as is easy and is possible is.

The goal is to make maintenance easier, and code reviews of the
memory setup easier.

Eric