Date:	Fri, 2 Jul 1999 09:33:21 +0200 (CEST)
From:	Niteshadow <niteshadow AT hq DOT alert DOT sk>
To:	pgcc AT delorie DOT com
Subject:	Re: Pentium III optimizatio
In-Reply-To:	<377BD117.5FCE9945@casema.net>
Message-ID:	<Pine.LNX.4.10.9907020928390.27825-100000@hq.alert.sk>
MIME-Version:	1.0
Reply-To:	pgcc AT delorie DOT com
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On Thu, 1 Jul 1999, Martijn Kruithof wrote:

> Igor Schein wrote:
> > 
> > Hi, can pgcc optimize for Pentium III architecture?
> > 
> > Thanks
> > Igor
> 
> As far as I know no special optimizations are available for P II/ P III
> (correct me if I am wrong) Use pentium pro optimizations for best
> results
> on P II / III
> 
> kind regs Martijn 
> 
> --
> <snipped, some stupid sig in dutch>
> 

there are the optimizations for PPro, yet the real difference between
PPro/PII/PIII are the MMX/Catmai instructions, which are (at least to my
knowledge) pretty tough to implement in a compiler. This has to do
(please correct me if I am wrong) with their use of FP registers and their
nature being SIWD -- this means the compiler would have to really know
what the programmer wanted to create with a chunk of C code..

signed
Robert


- ------------------------------------------------------------------------------
- From  : Robert 'Niteshadow' Varga
email : niteshadow AT hq DOT alert DOT sk, varga AT ibl DOT sk
PGPkey: http://hq.alert.sk/~niteshadow/pgpkey.txt
phone : +421 903 511 985 (mobile, always), +421 863 432 49 75 (home, rarely)
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