Date: Sat, 13 Mar 1999 21:57:29 +0100
To: Henrik Berglund SdU <pgcc AT delorie DOT com>
Subject: Re: 3DNow Optimizations, was Re: AMDK6 optimized kernel and others
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In-Reply-To: <Pine.LNX.4.10.9903131213250.10630-100000@pm11-198.gso.infi.net>; from Jonathan Mark Brooks on Sat, Mar 13, 1999 at 12:16:20PM -0500
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From: Marc Lehmann <pcg AT goof DOT com>
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On Sat, Mar 13, 1999 at 12:16:20PM -0500, Jonathan Mark Brooks wrote:
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> Just out of curiosity, will we see 3DNow! optimizations in the pgcc
> compiler?

If AMD gives me a dual amd-k7 machine, yes.

> Also, my understanding is that the next revision of ecgs is supposed
> to incorporate the pgcc x86 specific optimizations.

No. the process of enhancing egcs to pgccs level is gradual. Its not a
question of just applying the patch to egcs, its a continual re-engineerig
process to adapt the pgcc changes to the egcs environment.

Egcs has two goals that currently conflict with pgcc:

- must be rock-solid on x86 AND on other architectures. I'm working on
  making pgcc run on other archs, though, so this might go away.
- the compiler mustn's use ages to compile a program. pgcc often trades
  a large increase in compile time for relatively small code improvements.
  This is not acceptable for egcs, so the algorithms have to be improved.

> I saw the thread but I wasn't sure why this is a problem with 2.2 kernels,
> i.e., why you can't use the ecgs or pgcc compilers without error.

You can use pgcc-1.1.1, actually. you can also *usually* use the
snapshots.  I just don't want to hear any bug reports, as I'm tired of
debugging the kernel.

See the egcs faq (http://egcs.cygnus.com/), what it says about the kernel
also applies to pgcc, with he added limitation that I don't want to see
ugly bug reports, and my desire for seeing "pgcc is broken, it can't
compile linux" is growing towards negative infinity.

--  
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