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Message-ID: <19981207212512.D30338@cerebro.laendle>
Date: Mon, 7 Dec 1998 21:25:12 +0100
From: Marc Lehmann <pcg AT goof DOT com>
To: beastium-list AT desk DOT nl
Subject: Re: 3dnow in pgcc
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In-Reply-To: <Pine.GSO.4.05.9812072058470.5488-100000@stekt3>; from Tuukka Toivonen on Mon, Dec 07, 1998 at 09:01:13PM +0200
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On Mon, Dec 07, 1998 at 09:01:13PM +0200, Tuukka Toivonen wrote:
> On Mon, 7 Dec 1998, David Jonsson wrote:
> 
> ><excerpt><smaller>I'm not on the list. Please consider adding 3dnow in
> >pgcc.. I noticed you are planning MMX in the future.. You might also want
> 
> >Its not in the compiler. It is in the assembler, as.
> 
> "as" support is the first step. When as supports 3dnow, pgcc could
> theoretically generate 3dnow opcodes and take advantage of it.
> I don't know how easy that would to do, and if it would actually
> be useful optimization.

at least full 3dnow support is useful. I see the main advantage in being
able to use fp without switching (but with less precision, no long long
support and not faster).

There are three patches that give better mmx support in asm() statements,
the (old) one of mine (at ftp.goof.com/pub/pcg/test or so) enables the
generation of some mmx instructions.

I believe mmx support in one way or another will be added into egcs next
year. Once we can generate mmx people will start to use parallelization to
make better use of it ;)

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      ---==---(_)__  __ ____  __       Marc Lehmann       +--
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    The choice of a GNU generation                        |
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