From: Stephen Leake <Stephen.Leake@gsfc.nasa.gov>
Subject: Re: Ada to C/C++ translator needed
Date: 1996/10/08
Date: 1996-10-08T00:00:00+00:00 [thread overview]
Message-ID: <325A5740.52E6@gsfc.nasa.gov> (raw)
In-Reply-To: 53anuv$meh@news.nyu.edu
Having just helped write the MD files for a VERY simple chip (the
UT69R000), I can provide another anecdote.
I started with NO knowledge of gcc, an MD files that were copied from
some other chip and edited. It was fairly easy to get simple C code to
work (on the level of A = B + 1). But when I got to functions with many
statements, and the register allocation kicked in, things got
complicated very quickly. I had to learn how gcc allocated registers,
and how to make the MD files work with that process. Reading other MD
files helped a lot, and the gcc code is pretty well commented, but it
wasn't easy.
All told, it was six months before I got the C compiler to pass most of
an ANSI validation suite. I haven't gotten to testing the Ada compiler
yet (I'm working on other stuff); nested procedures and exception
handling may uncover another level of bugs. If the chip you are porting
to is at all complex, incorporating that complexity will take more time,
too.
On the whole, it was a rewarding experience; if you like complex
puzzles, go for it!
--
- Stephe
next prev parent reply other threads:[~1996-10-08 0:00 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-09-25 0:00 Ada to C/C++ translator needed Emmanuel Champommier
1996-09-25 0:00 ` David Weller
1996-10-02 0:00 ` B|rje Norden
1996-10-04 0:00 ` David Weller
1996-10-05 0:00 ` Robert Dewar
1996-10-05 0:00 ` Frank Manning
1996-10-06 0:00 ` Samuel Tardieu
1996-10-07 0:00 ` Richard Kenner
1996-10-07 0:00 ` Robert Dewar
1996-10-08 0:00 ` Stephen Leake [this message]
1996-10-07 0:00 ` Robert Dewar
1996-10-08 0:00 ` Frank Manning
1996-10-07 0:00 ` Erik Magnuson
1996-09-26 0:00 ` Ian Ward
[not found] ` <52feul$os2@goanna.cs.rmit.edu.au>
1996-09-28 0:00 ` Tim Behrendsen
1996-09-29 0:00 ` Ken Pizzini
1996-09-29 0:00 ` Tim Behrendsen
1996-09-29 0:00 ` Robert Dewar
1996-09-30 0:00 ` Tim Behrendsen
1996-09-30 0:00 ` William Clodius
1996-09-30 0:00 ` Matthew Heaney
1996-09-30 0:00 ` Tim Behrendsen
1996-10-01 0:00 ` Richard A. O'Keefe
1996-09-30 0:00 ` Richard A. O'Keefe
1996-09-30 0:00 ` Tim Behrendsen
1996-09-30 0:00 ` Richard A. O'Keefe
1996-09-30 0:00 ` Peter Seebach
1996-10-02 0:00 ` Richard A. O'Keefe
1996-10-05 0:00 ` Lawrence Kirby
1996-09-30 0:00 ` Tim Behrendsen
1996-09-30 0:00 ` Peter Seebach
1996-09-30 0:00 ` Tim Behrendsen
1996-10-01 0:00 ` Richard A. O'Keefe
1996-10-01 0:00 ` Tim Behrendsen
1996-10-02 0:00 ` Ian Ward
1996-10-02 0:00 ` Tim Behrendsen
1996-10-06 0:00 ` Tanmoy Bhattacharya
1996-10-06 0:00 ` Lawrence Kirby
1996-10-08 0:00 ` Peter Seebach
1996-10-07 0:00 ` Tanmoy Bhattacharya
1996-10-02 0:00 ` Jon S Anthony
1996-10-02 0:00 ` Jon S Anthony
-- strict thread matches above, loose matches on Subject: below --
1996-10-02 0:00 Simon Johnston
1996-10-07 0:00 ` Richard Riehle
1996-10-09 0:00 ` Richard A. O'Keefe
1996-10-15 0:00 ` Tucker Taft
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox